diff --git a/.config/dictionaries/project.dic b/.config/dictionaries/project.dic
index 1812da14af..7d0d4d2fd8 100644
--- a/.config/dictionaries/project.dic
+++ b/.config/dictionaries/project.dic
@@ -80,6 +80,7 @@ junitreport
 Keyhash
 keyserver
 lcov
+lerp
 Leshiy
 libapp
 libavcodec
@@ -179,6 +180,7 @@ vkeywitness
 voteplan
 voteplans
 wallclock
+wasmtime
 Werror
 xcassets
 xcconfig
@@ -188,4 +190,12 @@ xcodeproj
 xctest
 xctestrun
 xcworkspace
-yoroi
\ No newline at end of file
+yoroi
+multiplatform
+Multiplatform
+Easterling
+lovelace
+lovelaces
+pinenacl
+dtscalac
+vkeys
diff --git a/.gitignore b/.gitignore
index 515ebe4db1..d6aba0034f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -22,7 +22,6 @@
 # Icon must end with two \r
 Icon
 
-
 # Thumbnails
 ._*
 
@@ -103,4 +102,8 @@ dev-catalyst-voice-9f78f27c6bc5.json
 /docs/site/
 
 # Rust
-Cargo.lock
\ No newline at end of file
+
+# By default ignore Cargo.lock
+# Specifically exclude it in the directory it appears, if its required.
+# More information here https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html
+Cargo.lock
diff --git a/Earthfile b/Earthfile
index 9fa6990e1b..0f94987112 100644
--- a/Earthfile
+++ b/Earthfile
@@ -1,31 +1,34 @@
-# Set the Earthly version to 0.7
+VERSION 0.8
+
+IMPORT github.com/input-output-hk/catalyst-ci/earthly/mdlint:v3.00.0 AS mdlint-ci
+IMPORT github.com/input-output-hk/catalyst-ci/earthly/cspell:v3.00.0 AS cspell-ci
+IMPORT github.com/input-output-hk/catalyst-ci/earthly/postgresql:v3.00.0 AS postgresql-ci
 
-VERSION 0.7
 FROM debian:stable-slim
 
 # cspell: words livedocs sitedocs
 
 # check-markdown markdown check using catalyst-ci.
 check-markdown:
-    DO github.com/input-output-hk/catalyst-ci/earthly/mdlint:v2.11.1+CHECK
+    DO mdlint-ci+CHECK
 
 # markdown-check-fix markdown check and fix using catalyst-ci.
 markdown-check-fix:
     LOCALLY
 
-    DO github.com/input-output-hk/catalyst-ci/earthly/mdlint:v2.11.1+MDLINT_LOCALLY --src=$(echo ${PWD}) --fix=--fix
+    DO mdlint-ci+MDLINT_LOCALLY --src=$(echo ${PWD}) --fix=--fix
 
 # check-spelling Check spelling in this repo inside a container.
 check-spelling:
-    DO github.com/input-output-hk/catalyst-ci/earthly/cspell:v2.11.1+CHECK
+    DO cspell-ci+CHECK
 
 # check if the sql files are properly formatted and pass lint quality checks.
 check-sqlfluff:
-    FROM github.com/input-output-hk/catalyst-ci/earthly/postgresql:v2.11.1+postgres-base
+    FROM postgresql-ci+postgres-base
 
     COPY . .
 
-    DO github.com/input-output-hk/catalyst-ci/earthly/postgresql:v2.11.1+CHECK
+    DO postgresql-ci+CHECK
 
 repo-docs:
     # Create artifacts of extra files we embed inside the documentation when its built.
diff --git a/athena/.gitignore b/athena/.gitignore
index aa901d56da..8afaf0c8eb 100644
--- a/athena/.gitignore
+++ b/athena/.gitignore
@@ -4,12 +4,8 @@
 debug/
 target/
 
-# Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
-# More information here https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html
-Cargo.lock
-
 # These are backup files generated by rustfmt
 **/*.rs.bk
 
 # MSVC Windows builds of rustc generate these, which store debugging information
-*.pdb
\ No newline at end of file
+*.pdb
diff --git a/catalyst-gateway/.gitignore b/catalyst-gateway/.gitignore
index c1b3e69689..92e534b054 100644
--- a/catalyst-gateway/.gitignore
+++ b/catalyst-gateway/.gitignore
@@ -8,4 +8,8 @@ target/
 **/*.rs.bk
 
 # MSVC Windows builds of rustc generate these, which store debugging information
-*.pdb
\ No newline at end of file
+*.pdb
+
+# Build artifacts
+cat-gateway.coverage-report.info
+cat-gateway.junit-report.xml
diff --git a/catalyst-gateway/Cargo.lock b/catalyst-gateway/Cargo.lock
deleted file mode 100644
index 63edbb0a74..0000000000
--- a/catalyst-gateway/Cargo.lock
+++ /dev/null
@@ -1,4338 +0,0 @@
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-checksum = "7dd37b7e5ab9018759f893a1952c9420d060016fc19a472b4bb20d1bdd694d1b"
-dependencies = [
- "windows_aarch64_gnullvm 0.52.4",
- "windows_aarch64_msvc 0.52.4",
- "windows_i686_gnu 0.52.4",
- "windows_i686_msvc 0.52.4",
- "windows_x86_64_gnu 0.52.4",
- "windows_x86_64_gnullvm 0.52.4",
- "windows_x86_64_msvc 0.52.4",
-]
-
-[[package]]
-name = "windows_aarch64_gnullvm"
-version = "0.48.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2b38e32f0abccf9987a4e3079dfb67dcd799fb61361e53e2882c3cbaf0d905d8"
-
-[[package]]
-name = "windows_aarch64_gnullvm"
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-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bcf46cf4c365c6f2d1cc93ce535f2c8b244591df96ceee75d8e83deb70a9cac9"
-
-[[package]]
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-checksum = "dc35310971f3b2dbbf3f0690a219f40e2d9afcf64f9ab7cc1be722937c26b4bc"
-
-[[package]]
-name = "windows_aarch64_msvc"
-version = "0.52.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
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-
-[[package]]
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-source = "registry+https://github.com/rust-lang/crates.io-index"
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-
-[[package]]
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-source = "registry+https://github.com/rust-lang/crates.io-index"
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-
-[[package]]
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-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8f55c233f70c4b27f66c523580f78f1004e8b5a8b659e05a4eb49d4166cca406"
-
-[[package]]
-name = "windows_i686_msvc"
-version = "0.52.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1515e9a29e5bed743cb4415a9ecf5dfca648ce85ee42e15873c3cd8610ff8e02"
-
-[[package]]
-name = "windows_x86_64_gnu"
-version = "0.48.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "53d40abd2583d23e4718fddf1ebec84dbff8381c07cae67ff7768bbf19c6718e"
-
-[[package]]
-name = "windows_x86_64_gnu"
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-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5eee091590e89cc02ad514ffe3ead9eb6b660aedca2183455434b93546371a03"
-
-[[package]]
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-version = "0.48.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0b7b52767868a23d5bab768e390dc5f5c55825b6d30b86c844ff2dc7414044cc"
-
-[[package]]
-name = "windows_x86_64_gnullvm"
-version = "0.52.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "77ca79f2451b49fa9e2af39f0747fe999fcda4f5e241b2898624dca97a1f2177"
-
-[[package]]
-name = "windows_x86_64_msvc"
-version = "0.48.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ed94fce61571a4006852b7389a063ab983c02eb1bb37b47f8272ce92d06d9538"
-
-[[package]]
-name = "windows_x86_64_msvc"
-version = "0.52.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "32b752e52a2da0ddfbdbcc6fceadfeede4c939ed16d13e648833a61dfb611ed8"
-
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-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f593a95398737aeed53e489c785df13f3618e41dbcd6718c6addbf1395aa6876"
-dependencies = [
- "memchr",
-]
-
-[[package]]
-name = "wyz"
-version = "0.5.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "05f360fc0b24296329c78fda852a1e9ae82de9cf7b27dae4b7f62f118f77b9ed"
-dependencies = [
- "tap",
-]
-
-[[package]]
-name = "zeroize"
-version = "1.7.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "525b4ec142c6b68a2d10f01f7bbf6755599ca3f81ea53b8431b7dd348f5fdb2d"
diff --git a/catalyst-gateway/Cargo.toml b/catalyst-gateway/Cargo.toml
index 3b175c68fb..7b85571ab8 100644
--- a/catalyst-gateway/Cargo.toml
+++ b/catalyst-gateway/Cargo.toml
@@ -21,9 +21,8 @@ tracing = "0.1.37"
 tracing-subscriber = "0.3.16"
 serde = "1.0"
 serde_json = "1.0"
-poem = "2.0.0"
-poem-openapi = "4.0.0"
-poem-extensions = "0.8.0"
+poem = "3.0.0"
+poem-openapi = "5.0.0"
 prometheus = "0.13.0"
 cryptoxide = "0.4.4"
 uuid = "1"
@@ -42,7 +41,7 @@ bb8-postgres = "0.8.1"
 tokio-postgres = "0.7.10"
 tokio = "1"
 dotenvy = "0.15"
-local-ip-address = "0.5.7"
+local-ip-address = "0.6.1"
 gethostname = "0.4.3"
 hex = "0.4.3"
 handlebars = "5.1.2"
diff --git a/catalyst-gateway/Earthfile b/catalyst-gateway/Earthfile
index 305ec8cb11..84597480cb 100644
--- a/catalyst-gateway/Earthfile
+++ b/catalyst-gateway/Earthfile
@@ -1,10 +1,13 @@
-VERSION --try --global-cache 0.7
+VERSION 0.8
+
+IMPORT github.com/input-output-hk/catalyst-ci/earthly/rust:v3.00.0 AS rust-ci
+IMPORT github.com/input-output-hk/catalyst-ci/earthly/mithril_snapshot:v3.00.0 AS mithril-snapshot-ci
 
 #cspell: words rustfmt toolsets USERARCH
 
-# Set up our target toolchains, and copy our files.
+# builder : Set up our target toolchains, and copy our files.
 builder:
-    DO github.com/input-output-hk/catalyst-ci/earthly/rust:v2.11.1+SETUP
+    DO rust-ci+SETUP
 
     COPY --dir .cargo .config Cargo.* clippy.toml deny.toml rustfmt.toml bin crates .
 
@@ -14,39 +17,45 @@ builder:
 ##
 ## These targets are discovered and executed automatically by CI.
 
-# Run check using the most efficient host tooling
+# check : Run check using the most efficient host tooling
 # CI Automated Entry point.
 check:
     FROM +builder
 
-    RUN /scripts/std_checks.py
+    DO rust-ci+EXECUTE --cmd="/scripts/std_checks.py"
 
-# Test which runs check with all supported host tooling.  Needs qemu or rosetta to run.
+# all-hosts-check : Test which runs check with all supported host tooling.  Needs qemu or rosetta to run.
 # Only used to validate tooling is working across host toolsets.
 all-hosts-check:
     BUILD --platform=linux/amd64 --platform=linux/arm64 +check
 
+# build : Build the catalyst-gateway service
 build:
     # Build the service
     FROM +builder
 
-    TRY
-        RUN /scripts/std_build.py \
-                --cov_report="coverage-report.info" \
-                --bins="cat-gateway/cat-gateway"
-    FINALLY
-        SAVE ARTIFACT --if-exists target/nextest/ci/junit.xml AS LOCAL cat-gateway.junit-report.xml
-        SAVE ARTIFACT --if-exists coverage-report.info AS LOCAL cat-gateway.coverage-report.info
-    END
-    RUN ./target/$TARGETARCH/release/cat-gateway docs ./target/$TARGETARCH/doc/cat-gateway-api.json
-    SAVE ARTIFACT target/$TARGETARCH/doc doc
-    SAVE ARTIFACT target/$TARGETARCH/release/cat-gateway cat-gateway
-
-# Test which runs check with all supported host tooling.  Needs qemu or rosetta to run.
+    DO rust-ci+EXECUTE \
+        --cmd="/scripts/std_build.py" \
+        --args1="--bins=cat-gateway/cat-gateway" \
+        --args2="--cov_report=$HOME/coverage-report.info" \
+        --args3="--verbose" \
+        --output="release/cat-gateway" \
+        --junit="cat-gateway.junit-report.xml" \
+        --coverage="cat-gateway.coverage-report.info" \
+        --docs="true"
+
+    # Generate the OpenAPI doc from the cat-gateway executable itself.
+    RUN ./target/release/cat-gateway docs ./target/doc/cat-gateway-api.json
+
+    SAVE ARTIFACT target/doc doc
+    SAVE ARTIFACT target/release/cat-gateway cat-gateway
+
+# all-hosts-build : Test which runs check with all supported host tooling.  Needs qemu or rosetta to run.
 # Only used to validate tooling is working across host toolsets.
 all-hosts-build:
     BUILD --platform=linux/amd64 --platform=linux/arm64 +build
 
+# package-cat-gateway : Create a deployable container for catalyst-gateway
 package-cat-gateway:
     ARG tag="latest"
 
@@ -61,13 +70,15 @@ package-cat-gateway:
     ENTRYPOINT ./entry.sh
     SAVE IMAGE cat-gateway:$tag
 
+# package-cat-gateway : Create a deployable container for catalyst-gateway
+# And bundle a Mithril snapshot of cardano preprod
 package-cat-gateway-with-preprod-snapshot:
     ARG tag="latest"
 
     FROM +package-cat-gateway
 
     # copy preprod mithril snapshot to /tmp/preprod dir
-    COPY github.com/input-output-hk/catalyst-ci/earthly/mithril_snapshot:v2.11.1+package-preprod-snapshot/snapshot /tmp/preprod
+    COPY mithril-snapshot-ci+package-preprod-snapshot/snapshot /tmp/preprod
 
     SAVE IMAGE cat-gateway:$tag
 
diff --git a/catalyst-gateway/bin/Cargo.toml b/catalyst-gateway/bin/Cargo.toml
index 6c4ff37820..f08b2b7a71 100644
--- a/catalyst-gateway/bin/Cargo.toml
+++ b/catalyst-gateway/bin/Cargo.toml
@@ -48,7 +48,6 @@ poem-openapi = { workspace = true, features = [
     "url",
     "chrono",
 ] }
-poem-extensions = { workspace = true }
 prometheus = { workspace = true }
 cryptoxide = { workspace = true }
 uuid = { workspace = true, features = ["v4", "serde"] }
diff --git a/catalyst-gateway/bin/src/cardano/util.rs b/catalyst-gateway/bin/src/cardano/util.rs
index db0e099229..fb54d3217a 100644
--- a/catalyst-gateway/bin/src/cardano/util.rs
+++ b/catalyst-gateway/bin/src/cardano/util.rs
@@ -23,7 +23,6 @@ pub type StakeCredentialKey = String;
 pub(crate) const BLAKE_2B_256_HASH_SIZE: usize = 256 / 8;
 
 /// Helper function to generate the `blake2b_256` hash of a byte slice
-#[allow(dead_code)]
 pub(crate) fn hash(bytes: &[u8]) -> [u8; BLAKE_2B_256_HASH_SIZE] {
     let mut digest = [0u8; BLAKE_2B_256_HASH_SIZE];
     let mut context = Blake2b::new(BLAKE_2B_256_HASH_SIZE);
@@ -54,7 +53,7 @@ pub struct PolicyAsset {
 }
 
 /// Extract assets
-pub fn parse_policy_assets(assets: &[MultiEraPolicyAssets<'_>]) -> Vec<PolicyAsset> {
+pub(crate) fn parse_policy_assets(assets: &[MultiEraPolicyAssets<'_>]) -> Vec<PolicyAsset> {
     assets
         .iter()
         .map(|asset| {
@@ -67,7 +66,7 @@ pub fn parse_policy_assets(assets: &[MultiEraPolicyAssets<'_>]) -> Vec<PolicyAss
 }
 
 /// Parse child assets
-pub fn parse_child_assets(assets: &[MultiEraAsset]) -> Vec<Asset> {
+fn parse_child_assets(assets: &[MultiEraAsset]) -> Vec<Asset> {
     assets
         .iter()
         .filter_map(|asset| {
diff --git a/catalyst-gateway/bin/src/cli.rs b/catalyst-gateway/bin/src/cli.rs
index 586af14b0e..aae2367fd3 100644
--- a/catalyst-gateway/bin/src/cli.rs
+++ b/catalyst-gateway/bin/src/cli.rs
@@ -6,7 +6,8 @@ use tracing::{error, info};
 
 use crate::{
     cardano::start_followers,
-    logger, service,
+    logger,
+    service::{self, started},
     settings::{DocsSettings, ServiceSettings},
     state::State,
 };
@@ -54,13 +55,14 @@ impl Cli {
                     }
                 });
 
-                start_followers(
+                let followers_fut = start_followers(
                     event_db.clone(),
                     settings.follower_settings.check_config_tick,
                     settings.follower_settings.data_refresh_tick,
                     machine_id,
-                )
-                .await?;
+                );
+                started();
+                followers_fut.await?;
 
                 Ok(())
             },
diff --git a/catalyst-gateway/bin/src/event_db/legacy/queries/search.rs b/catalyst-gateway/bin/src/event_db/legacy/queries/search.rs
index e21e15c2fe..4c0f0dfb3a 100644
--- a/catalyst-gateway/bin/src/event_db/legacy/queries/search.rs
+++ b/catalyst-gateway/bin/src/event_db/legacy/queries/search.rs
@@ -38,9 +38,7 @@ impl EventDB {
             where_clause.push_str(
                 format!(
                     "WHERE {0}.{1} LIKE '%{2}%'",
-                    table,
-                    filter.column.to_string(),
-                    filter.search
+                    table, filter.column, filter.search
                 )
                 .as_str(),
             );
@@ -48,9 +46,7 @@ impl EventDB {
                 where_clause.push_str(
                     format!(
                         "AND {0}.{1} LIKE '%{2}%'",
-                        table,
-                        filter.column.to_string(),
-                        filter.search
+                        table, filter.column, filter.search
                     )
                     .as_str(),
                 );
@@ -66,24 +62,12 @@ impl EventDB {
         if let Some(order_by) = order_by_iter.next() {
             let order_type = if order_by.descending { "DESC" } else { "ASC" };
             order_by_clause.push_str(
-                format!(
-                    "ORDER BY {0}.{1} {2}",
-                    table,
-                    order_by.column.to_string(),
-                    order_type
-                )
-                .as_str(),
+                format!("ORDER BY {0}.{1} {2}", table, order_by.column, order_type).as_str(),
             );
             for order_by in order_by_iter {
                 let order_type = if order_by.descending { "DESC" } else { "ASC" };
                 order_by_clause.push_str(
-                    format!(
-                        ", {0}.{1} LIKE '%{2}%'",
-                        table,
-                        order_by.column.to_string(),
-                        order_type
-                    )
-                    .as_str(),
+                    format!(", {0}.{1} LIKE '%{2}%'", table, order_by.column, order_type).as_str(),
                 );
             }
         }
diff --git a/catalyst-gateway/bin/src/event_db/legacy/types/search.rs b/catalyst-gateway/bin/src/event_db/legacy/types/search.rs
index bd28c888e6..a044b92a2f 100644
--- a/catalyst-gateway/bin/src/event_db/legacy/types/search.rs
+++ b/catalyst-gateway/bin/src/event_db/legacy/types/search.rs
@@ -1,4 +1,6 @@
 //! Search Queries
+use std::fmt::Display;
+
 use super::{event::EventSummary, objective::ObjectiveSummary, proposal::ProposalSummary};
 
 #[allow(clippy::module_name_repetitions)]
@@ -37,14 +39,14 @@ pub(crate) enum SearchColumn {
     Funds,
 }
 
-impl ToString for SearchColumn {
-    fn to_string(&self) -> String {
+impl Display for SearchColumn {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         match self {
-            SearchColumn::Title => "title".to_string(),
-            SearchColumn::Type => "type".to_string(),
-            SearchColumn::Description => "description".to_string(),
-            SearchColumn::Author => "author".to_string(),
-            SearchColumn::Funds => "funds".to_string(),
+            SearchColumn::Title => write!(f, "title"),
+            SearchColumn::Type => write!(f, "type"),
+            SearchColumn::Description => write!(f, "description"),
+            SearchColumn::Author => write!(f, "author"),
+            SearchColumn::Funds => write!(f, "funds"),
         }
     }
 }
diff --git a/catalyst-gateway/bin/src/event_db/legacy/types/voting_status.rs b/catalyst-gateway/bin/src/event_db/legacy/types/voting_status.rs
index 51d7dc0256..53d38e0154 100644
--- a/catalyst-gateway/bin/src/event_db/legacy/types/voting_status.rs
+++ b/catalyst-gateway/bin/src/event_db/legacy/types/voting_status.rs
@@ -1,13 +1,15 @@
 //! Voting Status
-use super::objective::ObjectiveId;
 
-/// A voting status
-#[derive(Debug, Clone, PartialEq, Eq)]
-pub(crate) struct VotingStatus {
-    /// The objective ID
-    pub(crate) objective_id: ObjectiveId,
-    /// The voting status
-    pub(crate) open: bool,
-    /// The settings
-    pub(crate) settings: Option<String>,
-}
+// Not currently used
+// use super::objective::ObjectiveId;
+//
+// A voting status
+// #[derive(Debug, Clone, PartialEq, Eq)]
+// pub(crate) struct VotingStatus {
+// The objective ID
+// pub(crate) objective_id: ObjectiveId,
+// The voting status
+// pub(crate) open: bool,
+// The settings
+// pub(crate) settings: Option<String>,
+// }
diff --git a/catalyst-gateway/bin/src/service/api/cardano/date_time_to_slot_number_get.rs b/catalyst-gateway/bin/src/service/api/cardano/date_time_to_slot_number_get.rs
index fb053fd812..bc9738e8f0 100644
--- a/catalyst-gateway/bin/src/service/api/cardano/date_time_to_slot_number_get.rs
+++ b/catalyst-gateway/bin/src/service/api/cardano/date_time_to_slot_number_get.rs
@@ -1,7 +1,6 @@
 //! Implementation of the GET `/date_time_to_slot_number` endpoint
 
-use poem_extensions::{response, UniResponse::T200};
-use poem_openapi::payload::Json;
+use poem_openapi::{payload::Json, ApiResponse};
 
 use crate::{
     event_db::{
@@ -13,22 +12,21 @@ use crate::{
             network::Network,
             slot_info::{Slot, SlotInfo},
         },
-        responses::{
-            resp_2xx::OK,
-            resp_4xx::ApiValidationError,
-            resp_5xx::{handle_5xx_response, ServerError, ServiceUnavailable},
-        },
+        responses::WithErrorResponses,
     },
     state::State,
 };
 
-/// # All Responses
-pub(crate) type AllResponses = response! {
-    200: OK<Json<SlotInfo>>,
-    400: ApiValidationError,
-    500: ServerError,
-    503: ServiceUnavailable,
-};
+/// Endpoint responses.
+#[derive(ApiResponse)]
+pub(crate) enum Responses {
+    /// Returns the slot info.
+    #[oai(status = 200)]
+    Ok(Json<SlotInfo>),
+}
+
+/// All responses.
+pub(crate) type AllResponses = WithErrorResponses<Responses>;
 
 /// # GET `/date_time_to_slot_number`
 #[allow(clippy::unused_async)]
@@ -71,20 +69,21 @@ pub(crate) async fn endpoint(
 
     let current = match process_slot_info_result(current) {
         Ok(current) => current,
-        Err(err) => return handle_5xx_response!(err),
+        Err(err) => return AllResponses::handle_error(&err),
     };
     let previous = match process_slot_info_result(previous) {
         Ok(current) => current,
-        Err(err) => return handle_5xx_response!(err),
+        Err(err) => return AllResponses::handle_error(&err),
     };
     let next = match process_slot_info_result(next) {
         Ok(current) => current,
-        Err(err) => return handle_5xx_response!(err),
+        Err(err) => return AllResponses::handle_error(&err),
     };
 
-    T200(OK(Json(SlotInfo {
+    Responses::Ok(Json(SlotInfo {
         previous,
         current,
         next,
-    })))
+    }))
+    .into()
 }
diff --git a/catalyst-gateway/bin/src/service/api/cardano/mod.rs b/catalyst-gateway/bin/src/service/api/cardano/mod.rs
index 680a67c328..727d2b1bed 100644
--- a/catalyst-gateway/bin/src/service/api/cardano/mod.rs
+++ b/catalyst-gateway/bin/src/service/api/cardano/mod.rs
@@ -40,14 +40,6 @@ impl CardanoApi {
     ///
     /// This endpoint returns the total Cardano's staked ada amount to the corresponded
     /// user's stake address.
-    ///
-    /// ## Responses
-    /// * 200 OK - Returns the staked ada amount.
-    /// * 400 Bad Request.
-    /// * 404 Not Found.
-    /// * 500 Server Error - If anything within this function fails unexpectedly.
-    /// * 503 Service Unavailable - Service is not ready, requests to other
-    /// endpoints should not be sent until the service becomes ready.
     async fn staked_ada_get(
         &self, data: Data<&Arc<State>>,
         /// The stake address of the user.
@@ -80,14 +72,6 @@ impl CardanoApi {
     ///
     /// This endpoint returns the registration info followed by the [CIP-36](https://cips.cardano.org/cip/CIP-36/) to the
     /// corresponded user's stake address.
-    ///
-    /// ## Responses
-    /// * 200 OK - Returns the registration info.
-    /// * 400 Bad Request.
-    /// * 404 Not Found.
-    /// * 500 Server Error - If anything within this function fails unexpectedly.
-    /// * 503 Service Unavailable - Service is not ready, requests to other
-    /// endpoints should not be sent until the service becomes ready.
     async fn registration_get(
         &self, data: Data<&Arc<State>>,
         /// The stake address of the user.
@@ -119,14 +103,6 @@ impl CardanoApi {
     /// Get Cardano follower's sync state.
     ///
     /// This endpoint returns the current cardano follower's sync state info.
-    ///
-    /// ## Responses
-    /// * 200 OK - Returns the follower's sync state.
-    /// * 400 Bad Request.
-    /// * 404 Not Found.
-    /// * 500 Server Error - If anything within this function fails unexpectedly.
-    /// * 503 Service Unavailable - Service is not ready, requests to other
-    /// endpoints should not be sent until the service becomes ready.
     async fn sync_state_get(
         &self, data: Data<&Arc<State>>,
         /// Cardano network type.
@@ -149,13 +125,6 @@ impl CardanoApi {
     ///
     /// This endpoint returns the closest cardano slot info to the provided
     /// date-time.
-    ///
-    /// ## Responses
-    /// * 200 OK - Returns the slot info.
-    /// * 400 Bad Request.
-    /// * 500 Server Error - If anything within this function fails unexpectedly.
-    /// * 503 Service Unavailable - Service is not ready, requests to other
-    /// endpoints should not be sent until the service becomes ready.
     async fn date_time_to_slot_number_get(
         &self, data: Data<&Arc<State>>,
         /// The date-time for which the slot number should be calculated.
diff --git a/catalyst-gateway/bin/src/service/api/cardano/registration_get.rs b/catalyst-gateway/bin/src/service/api/cardano/registration_get.rs
index a6d3e0f11f..86f284dfbf 100644
--- a/catalyst-gateway/bin/src/service/api/cardano/registration_get.rs
+++ b/catalyst-gateway/bin/src/service/api/cardano/registration_get.rs
@@ -1,10 +1,6 @@
 //! Implementation of the GET `/registration` endpoint
 
-use poem_extensions::{
-    response,
-    UniResponse::{T200, T400, T404},
-};
-use poem_openapi::payload::Json;
+use poem_openapi::{payload::Json, ApiResponse};
 
 use crate::{
     event_db::{cardano::chain_state::SlotNumber, error::NotFoundError},
@@ -13,26 +9,27 @@ use crate::{
             objects::cardano::{
                 network::Network, registration_info::RegistrationInfo, stake_address::StakeAddress,
             },
-            responses::{
-                resp_2xx::OK,
-                resp_4xx::{ApiValidationError, NotFound},
-                resp_5xx::{handle_5xx_response, ServerError, ServiceUnavailable},
-            },
+            responses::WithErrorResponses,
         },
         utilities::check_network,
     },
     state::State,
 };
 
-/// # All Responses
-#[allow(dead_code)]
-pub(crate) type AllResponses = response! {
-    200: OK<Json<RegistrationInfo>>,
-    400: ApiValidationError,
-    404: NotFound,
-    500: ServerError,
-    503: ServiceUnavailable,
-};
+/// Endpoint responses
+#[derive(ApiResponse)]
+pub(crate) enum Responses {
+    /// The registration information for the stake address queried.
+    #[oai(status = 200)]
+    Ok(Json<RegistrationInfo>),
+    /// No valid registration found for the provided stake address
+    /// and provided slot number.
+    #[oai(status = 404)]
+    NotFound,
+}
+
+/// All responses
+pub(crate) type AllResponses = WithErrorResponses<Responses>;
 
 /// # GET `/registration`
 pub(crate) async fn endpoint(
@@ -45,7 +42,7 @@ pub(crate) async fn endpoint(
     let stake_credential = stake_address.payload().as_hash().to_vec();
     let network = match check_network(stake_address.network(), provided_network) {
         Ok(network) => network,
-        Err(err) => return T400(err),
+        Err(err) => return AllResponses::handle_error(&err),
     };
 
     // get the total utxo amount from the database
@@ -54,14 +51,15 @@ pub(crate) async fn endpoint(
         .await
     {
         Ok((tx_id, payment_address, voting_info, nonce)) => {
-            T200(OK(Json(RegistrationInfo::new(
+            Responses::Ok(Json(RegistrationInfo::new(
                 tx_id,
                 &payment_address,
                 voting_info,
                 nonce,
-            ))))
+            )))
+            .into()
         },
-        Err(err) if err.is::<NotFoundError>() => T404(NotFound),
-        Err(err) => handle_5xx_response!(err),
+        Err(err) if err.is::<NotFoundError>() => Responses::NotFound.into(),
+        Err(err) => AllResponses::handle_error(&err),
     }
 }
diff --git a/catalyst-gateway/bin/src/service/api/cardano/staked_ada_get.rs b/catalyst-gateway/bin/src/service/api/cardano/staked_ada_get.rs
index c06fca9d92..7e039c3f5a 100644
--- a/catalyst-gateway/bin/src/service/api/cardano/staked_ada_get.rs
+++ b/catalyst-gateway/bin/src/service/api/cardano/staked_ada_get.rs
@@ -1,10 +1,6 @@
 //! Implementation of the GET `/staked_ada` endpoint
 
-use poem_extensions::{
-    response,
-    UniResponse::{T200, T400, T404},
-};
-use poem_openapi::payload::Json;
+use poem_openapi::{payload::Json, ApiResponse};
 
 use crate::{
     event_db::{cardano::chain_state::SlotNumber, error::NotFoundError},
@@ -13,25 +9,26 @@ use crate::{
             objects::cardano::{
                 network::Network, stake_address::StakeAddress, stake_info::StakeInfo,
             },
-            responses::{
-                resp_2xx::OK,
-                resp_4xx::{ApiValidationError, NotFound},
-                resp_5xx::{handle_5xx_response, ServerError, ServiceUnavailable},
-            },
+            responses::WithErrorResponses,
         },
         utilities::check_network,
     },
     state::State,
 };
 
-/// # All Responses
-pub(crate) type AllResponses = response! {
-    200: OK<Json<StakeInfo>>,
-    400: ApiValidationError,
-    404: NotFound,
-    500: ServerError,
-    503: ServiceUnavailable,
-};
+/// Endpoint responses.
+#[derive(ApiResponse)]
+pub(crate) enum Responses {
+    /// The amount of ADA staked by the queried stake address, as at the indicated slot.
+    #[oai(status = 200)]
+    Ok(Json<StakeInfo>),
+    /// The queried stake address was not found at the requested slot number.
+    #[oai(status = 404)]
+    NotFound,
+}
+
+/// All responses.
+pub(crate) type AllResponses = WithErrorResponses<Responses>;
 
 /// # GET `/staked_ada`
 pub(crate) async fn endpoint(
@@ -45,7 +42,7 @@ pub(crate) async fn endpoint(
 
     let network = match check_network(stake_address.network(), provided_network) {
         Ok(network) => network,
-        Err(err) => return T400(err),
+        Err(err) => return AllResponses::handle_error(&err),
     };
 
     // get the total utxo amount from the database
@@ -54,12 +51,13 @@ pub(crate) async fn endpoint(
         .await
     {
         Ok((amount, slot_number)) => {
-            T200(OK(Json(StakeInfo {
+            Responses::Ok(Json(StakeInfo {
                 amount,
                 slot_number,
-            })))
+            }))
+            .into()
         },
-        Err(err) if err.is::<NotFoundError>() => T404(NotFound),
-        Err(err) => handle_5xx_response!(err),
+        Err(err) if err.is::<NotFoundError>() => Responses::NotFound.into(),
+        Err(err) => AllResponses::handle_error(&err),
     }
 }
diff --git a/catalyst-gateway/bin/src/service/api/cardano/sync_state_get.rs b/catalyst-gateway/bin/src/service/api/cardano/sync_state_get.rs
index c8abdae323..e80e2a3b60 100644
--- a/catalyst-gateway/bin/src/service/api/cardano/sync_state_get.rs
+++ b/catalyst-gateway/bin/src/service/api/cardano/sync_state_get.rs
@@ -1,32 +1,29 @@
 //! Implementation of the GET `/sync_state` endpoint
 
-use poem_extensions::{
-    response,
-    UniResponse::{T200, T404},
-};
-use poem_openapi::payload::Json;
+use poem_openapi::{payload::Json, ApiResponse};
 
 use crate::{
     event_db::error::NotFoundError,
     service::common::{
         objects::cardano::{network::Network, sync_state::SyncState},
-        responses::{
-            resp_2xx::OK,
-            resp_4xx::{ApiValidationError, NotFound},
-            resp_5xx::{handle_5xx_response, ServerError, ServiceUnavailable},
-        },
+        responses::WithErrorResponses,
     },
     state::State,
 };
 
-/// # All Responses
-pub(crate) type AllResponses = response! {
-    200: OK<Json<SyncState>>,
-    400: ApiValidationError,
-    404: NotFound,
-    500: ServerError,
-    503: ServiceUnavailable,
-};
+/// Endpoint responses.
+#[derive(ApiResponse)]
+pub(crate) enum Responses {
+    /// The synchronisation state of the blockchain with the catalyst gateway service.
+    #[oai(status = 200)]
+    Ok(Json<SyncState>),
+    /// The network is unknown. Catalyst gateway is not syncing the queried network.
+    #[oai(status = 404)]
+    NotFound,
+}
+
+/// All responses.
+pub(crate) type AllResponses = WithErrorResponses<Responses>;
 
 /// # GET `/sync_state`
 #[allow(clippy::unused_async)]
@@ -37,13 +34,14 @@ pub(crate) async fn endpoint(state: &State, network: Option<Network>) -> AllResp
 
     match event_db.last_updated_state(network.into()).await {
         Ok((slot_number, block_hash, last_updated)) => {
-            T200(OK(Json(SyncState {
+            Responses::Ok(Json(SyncState {
                 slot_number,
                 block_hash: block_hash.into(),
                 last_updated,
-            })))
+            }))
+            .into()
         },
-        Err(err) if err.is::<NotFoundError>() => T404(NotFound),
-        Err(err) => handle_5xx_response!(err),
+        Err(err) if err.is::<NotFoundError>() => Responses::NotFound.into(),
+        Err(err) => AllResponses::handle_error(&err),
     }
 }
diff --git a/catalyst-gateway/bin/src/service/api/health/live_get.rs b/catalyst-gateway/bin/src/service/api/health/live_get.rs
index db198f8c6e..3acf18bf27 100644
--- a/catalyst-gateway/bin/src/service/api/health/live_get.rs
+++ b/catalyst-gateway/bin/src/service/api/health/live_get.rs
@@ -1,21 +1,38 @@
 //! Implementation of the GET /health/live endpoint
 
-use poem_extensions::{response, UniResponse::T204};
-use tracing::{error, info, warn};
-
-use crate::service::common::responses::{
-    resp_2xx::NoContent,
-    resp_4xx::ApiValidationError,
-    resp_5xx::{ServerError, ServiceUnavailable},
-};
-
-/// All responses
-pub(crate) type AllResponses = response! {
-    204: NoContent,
-    400: ApiValidationError,
-    500: ServerError,
-    503: ServiceUnavailable,
-};
+use std::sync::atomic::{AtomicBool, Ordering};
+
+use poem_openapi::ApiResponse;
+
+use crate::service::common::responses::WithErrorResponses;
+
+/// Flag to determine if the service has started
+static IS_LIVE: AtomicBool = AtomicBool::new(true);
+
+/// Set the started flag to `true`
+#[allow(dead_code)]
+pub(crate) fn set_live(flag: bool) {
+    IS_LIVE.store(flag, Ordering::Release);
+}
+/// Get the started flag
+#[allow(dead_code)]
+fn is_live() -> bool {
+    IS_LIVE.load(Ordering::Acquire)
+}
+
+/// Endpoint responses.
+#[derive(ApiResponse)]
+pub(crate) enum Responses {
+    /// Service is OK and can keep running.
+    #[oai(status = 204)]
+    NoContent,
+    /// Service is possibly not running reliably.
+    #[oai(status = 503)]
+    ServiceUnavailable,
+}
+
+/// All responses.
+pub(crate) type AllResponses = WithErrorResponses<Responses>;
 
 /// # GET /health/live
 ///
@@ -26,24 +43,11 @@ pub(crate) type AllResponses = response! {
 ///
 /// In this service, liveness is assumed unless there are multiple panics generated
 /// by an endpoint in a short window.
-///
-/// ## Responses
-///
-/// * 204 No Content - Service is OK and can keep running.
-/// * 400 API Validation Error
-/// * 500 Server Error - If anything within this function fails unexpectedly. (Possible
-///   but unlikely)
-/// * 503 Service Unavailable - Service is possibly not running reliably.
 #[allow(clippy::unused_async)]
 pub(crate) async fn endpoint() -> AllResponses {
-    // TODO: Detect if too many panics have occurred in a defined window.
-    // If so, return a 503
-    // T503(ServiceUnavailable)
-
-    info!("liveness check");
-    warn!("liveness check - warn");
-    error!("liveness check - error");
-
-    // otherwise everything seems to be A-OK
-    T204(NoContent)
+    if is_live() {
+        Responses::NoContent.into()
+    } else {
+        Responses::ServiceUnavailable.into()
+    }
 }
diff --git a/catalyst-gateway/bin/src/service/api/health/mod.rs b/catalyst-gateway/bin/src/service/api/health/mod.rs
index 9a7b190c46..0e886a474a 100644
--- a/catalyst-gateway/bin/src/service/api/health/mod.rs
+++ b/catalyst-gateway/bin/src/service/api/health/mod.rs
@@ -10,6 +10,8 @@ mod live_get;
 mod ready_get;
 mod started_get;
 
+pub(crate) use started_get::started;
+
 /// Health API Endpoints
 pub(crate) struct HealthApi;
 
@@ -25,13 +27,6 @@ impl HealthApi {
     ///
     /// *This endpoint is for internal use of the service deployment infrastructure.
     /// It may not be exposed publicly.*
-    ///
-    /// ## Responses
-    ///
-    /// * 204 No Content - Service is Started and can serve requests.
-    /// * 500 Server Error - If anything within this function fails unexpectedly.
-    /// * 503 Service Unavailable - Service has not started, do not send other requests
-    ///   yet.
     async fn started_get(&self) -> started_get::AllResponses {
         started_get::endpoint().await
     }
@@ -46,13 +41,6 @@ impl HealthApi {
     ///
     /// *This endpoint is for internal use of the service deployment infrastructure.
     /// It may not be exposed publicly.*
-    ///
-    /// ## Responses
-    ///
-    /// * 204 No Content - Service is Ready and can serve requests.
-    /// * 500 Server Error - If anything within this function fails unexpectedly.
-    /// * 503 Service Unavailable - Service is not ready, requests to other
-    /// endpoints should not be sent until the service becomes ready.
     async fn ready_get(&self, state: Data<&Arc<State>>) -> ready_get::AllResponses {
         ready_get::endpoint(state).await
     }
@@ -66,13 +54,6 @@ impl HealthApi {
     ///
     /// *This endpoint is for internal use of the service deployment infrastructure.
     /// It may not be exposed publicly. Refer to []*
-    ///
-    /// ## Responses
-    ///
-    /// * 204 No Content - Service is OK and can keep running.
-    /// * 500 Server Error - If anything within this function fails unexpectedly.
-    ///   (Possible but unlikely)
-    /// * 503 Service Unavailable - Service is possibly not running reliably.
     async fn live_get(&self) -> live_get::AllResponses {
         live_get::endpoint().await
     }
diff --git a/catalyst-gateway/bin/src/service/api/health/ready_get.rs b/catalyst-gateway/bin/src/service/api/health/ready_get.rs
index 99abdbeeb7..cdf1d2ebb2 100644
--- a/catalyst-gateway/bin/src/service/api/health/ready_get.rs
+++ b/catalyst-gateway/bin/src/service/api/health/ready_get.rs
@@ -3,28 +3,26 @@
 use std::sync::Arc;
 
 use poem::web::Data;
-use poem_extensions::{
-    response,
-    UniResponse::{T204, T503},
-};
+use poem_openapi::ApiResponse;
 
 use crate::{
-    event_db::schema_check::MismatchedSchemaError,
-    service::common::responses::{
-        resp_2xx::NoContent,
-        resp_4xx::ApiValidationError,
-        resp_5xx::{handle_5xx_response, ServerError, ServiceUnavailable},
-    },
+    event_db::schema_check::MismatchedSchemaError, service::common::responses::WithErrorResponses,
     state::State,
 };
 
-/// All responses
-pub(crate) type AllResponses = response! {
-    204: NoContent,
-    400: ApiValidationError,
-    500: ServerError,
-    503: ServiceUnavailable,
-};
+/// Endpoint responses.
+#[derive(ApiResponse)]
+pub(crate) enum Responses {
+    /// Service is Started and can serve requests.
+    #[oai(status = 204)]
+    NoContent,
+    /// Service is not ready, do not send other requests.
+    #[oai(status = 503)]
+    ServiceUnavailable,
+}
+
+/// All responses.
+pub(crate) type AllResponses = WithErrorResponses<Responses>;
 
 /// # GET /health/ready
 ///
@@ -43,24 +41,16 @@ pub(crate) type AllResponses = response! {
 /// and is not able to properly service requests while it is occurring.
 /// This would let the load balancer shift traffic to other instances of this
 /// service that are ready.
-///
-/// ## Responses
-///
-/// * 204 No Content - Service is Ready to serve requests.
-/// * 400 API Validation Error
-/// * 500 Server Error - If anything within this function fails unexpectedly. (Possible
-///   but unlikely)
-/// * 503 Service Unavailable - Service is not ready, do not send other requests.
 pub(crate) async fn endpoint(state: Data<&Arc<State>>) -> AllResponses {
     match state.event_db().schema_version_check().await {
         Ok(_) => {
             tracing::debug!("DB schema version status ok");
-            T204(NoContent)
+            Responses::NoContent.into()
         },
         Err(err) if err.is::<MismatchedSchemaError>() => {
             tracing::error!("{err}");
-            T503(ServiceUnavailable)
+            Responses::ServiceUnavailable.into()
         },
-        Err(err) => handle_5xx_response!(err),
+        Err(err) => AllResponses::handle_error(&err),
     }
 }
diff --git a/catalyst-gateway/bin/src/service/api/health/started_get.rs b/catalyst-gateway/bin/src/service/api/health/started_get.rs
index 981d4788c0..c2a990a584 100644
--- a/catalyst-gateway/bin/src/service/api/health/started_get.rs
+++ b/catalyst-gateway/bin/src/service/api/health/started_get.rs
@@ -1,20 +1,36 @@
 //! Implementation of the GET /health/started endpoint
 
-use poem_extensions::{response, UniResponse::T204};
-
-use crate::service::common::responses::{
-    resp_2xx::NoContent,
-    resp_4xx::ApiValidationError,
-    resp_5xx::{ServerError, ServiceUnavailable},
-};
-
-/// All responses
-pub(crate) type AllResponses = response! {
-    204: NoContent,
-    400: ApiValidationError,
-    500: ServerError,
-    503: ServiceUnavailable,
-};
+use std::sync::atomic::{AtomicBool, Ordering};
+
+use poem_openapi::ApiResponse;
+
+use crate::service::common::responses::WithErrorResponses;
+
+/// Flag to determine if the service has started
+static IS_STARTED: AtomicBool = AtomicBool::new(false);
+
+/// Set the started flag to `true`
+pub(crate) fn started() {
+    IS_STARTED.store(true, Ordering::Release);
+}
+/// Get the started flag
+fn is_started() -> bool {
+    IS_STARTED.load(Ordering::Acquire)
+}
+
+/// Endpoint responses.
+#[derive(ApiResponse)]
+pub(crate) enum Responses {
+    /// Service is Started and can serve requests.
+    #[oai(status = 204)]
+    NoContent,
+    /// Service is not ready, do not send other requests.
+    #[oai(status = 503)]
+    ServiceUnavailable,
+}
+
+/// All responses.
+pub(crate) type AllResponses = WithErrorResponses<Responses>;
 
 /// # GET /health/started
 ///
@@ -33,16 +49,11 @@ pub(crate) type AllResponses = response! {
 /// into memory or processed in some way before the API can return valid
 /// responses.  In that scenario this endpoint would return 503 until that
 /// startup processing was fully completed.
-///
-/// ## Responses
-///
-/// * 204 No Content - Service is Started and can  serve requests.
-/// * 400 API Validation Error
-/// * 500 Server Error - If anything within this function fails unexpectedly. (Possible
-///   but unlikely)
-/// * 503 Service Unavailable - Service has not started, do not send other requests.
 #[allow(clippy::unused_async)]
 pub(crate) async fn endpoint() -> AllResponses {
-    // otherwise everything seems to be A-OK
-    T204(NoContent)
+    if is_started() {
+        Responses::NoContent.into()
+    } else {
+        Responses::ServiceUnavailable.into()
+    }
 }
diff --git a/catalyst-gateway/bin/src/service/api/legacy/registration/mod.rs b/catalyst-gateway/bin/src/service/api/legacy/registration/mod.rs
index 73c4047fc6..398c68c1c4 100644
--- a/catalyst-gateway/bin/src/service/api/legacy/registration/mod.rs
+++ b/catalyst-gateway/bin/src/service/api/legacy/registration/mod.rs
@@ -2,12 +2,11 @@
 use std::sync::Arc;
 
 use poem::web::Data;
-use poem_extensions::{response, UniResponse::T200};
 use poem_openapi::{
     param::{Path, Query},
     payload::Json,
     types::Example,
-    OpenApi,
+    ApiResponse, OpenApi,
 };
 
 use crate::{
@@ -17,11 +16,7 @@ use crate::{
                 event_id::EventId, voter_registration::VoterRegistration,
                 voting_public_key::VotingPublicKey,
             },
-            responses::{
-                resp_2xx::OK,
-                resp_4xx::{BadRequest, NotFound},
-                resp_5xx::{ServerError, ServiceUnavailable},
-            },
+            responses::WithErrorResponses,
             tags::ApiTags,
         },
         utilities::middleware::schema_validation::schema_version_validation,
@@ -32,6 +27,17 @@ use crate::{
 /// Registration API Endpoints
 pub(crate) struct RegistrationApi;
 
+/// Endpoint responses
+#[derive(ApiResponse)]
+enum Responses {
+    /// Voter's registration info
+    #[oai(status = 200)]
+    Ok(Json<VoterRegistration>),
+}
+
+/// All responses
+type AllResponses = WithErrorResponses<Responses>;
+
 #[OpenApi(prefix_path = "/registration", tag = "ApiTags::Registration")]
 impl RegistrationApi {
     #[oai(
@@ -67,13 +73,7 @@ impl RegistrationApi {
         /// in the response. Otherwise, it will be omitted.
         #[oai(default)]
         with_delegators: Query<bool>,
-    ) -> response! {
-           200: OK<Json<VoterRegistration>>,
-           400: BadRequest<Json<VoterRegistration>>,
-           404: NotFound,
-           500: ServerError,
-           503: ServiceUnavailable,
-       } {
-        T200(OK(Json(VoterRegistration::example())))
+    ) -> AllResponses {
+        Responses::Ok(Json(VoterRegistration::example())).into()
     }
 }
diff --git a/catalyst-gateway/bin/src/service/api/legacy/v0/message_post.rs b/catalyst-gateway/bin/src/service/api/legacy/v0/message_post.rs
index 762f763ea8..5e04ea3e77 100644
--- a/catalyst-gateway/bin/src/service/api/legacy/v0/message_post.rs
+++ b/catalyst-gateway/bin/src/service/api/legacy/v0/message_post.rs
@@ -1,42 +1,33 @@
 //! Implementation of the POST /message endpoint
 
-use poem_extensions::{response, UniResponse::T200};
-use poem_openapi::payload::{Binary, Json};
+use poem_openapi::{
+    payload::{Binary, Json},
+    ApiResponse,
+};
 
 use crate::service::common::{
     objects::legacy::fragments_processing_summary::FragmentsProcessingSummary,
-    responses::{
-        resp_2xx::OK,
-        resp_4xx::BadRequest,
-        resp_5xx::{ServerError, ServiceUnavailable},
-    },
+    responses::WithErrorResponses,
 };
 
+/// Endpoint responses
+#[derive(ApiResponse)]
+pub(crate) enum Responses {
+    /// Contains information about accepted and rejected fragments.
+    #[oai(status = 200)]
+    Ok(Json<FragmentsProcessingSummary>),
+}
+
 /// All responses
-pub(crate) type AllResponses = response! {
-    200: OK<Json<FragmentsProcessingSummary>>,
-    400: BadRequest<Json<FragmentsProcessingSummary>>,
-    500: ServerError,
-    503: ServiceUnavailable,
-};
+pub(crate) type AllResponses = WithErrorResponses<Responses>;
 
 /// # POST /message
 ///
 /// Message post endpoint.
 ///
 /// When successful, returns a summary of fragments accepted and rejected.
-///
-/// ## Responses
-///
-/// * 200 JSON Fragments Processing Summary - Contains information about accepted and
-///   rejected fragments.
-/// * 400 JSON Fragments Processing Summary - Contains information about accepted and
-///   rejected fragments.
-/// * 500 Server Error - If anything within this function fails unexpectedly. (Possible
-///   but unlikely)
-/// * 503 Service Unavailable - Service has not started, do not send other requests.
 #[allow(clippy::unused_async)]
 pub(crate) async fn endpoint(_message: Binary<Vec<u8>>) -> AllResponses {
     // otherwise everything seems to be A-OK
-    T200(OK(Json(FragmentsProcessingSummary::default())))
+    Responses::Ok(Json(FragmentsProcessingSummary::default())).into()
 }
diff --git a/catalyst-gateway/bin/src/service/api/legacy/v0/plans_get.rs b/catalyst-gateway/bin/src/service/api/legacy/v0/plans_get.rs
index a8b523fce8..8f7c600d88 100644
--- a/catalyst-gateway/bin/src/service/api/legacy/v0/plans_get.rs
+++ b/catalyst-gateway/bin/src/service/api/legacy/v0/plans_get.rs
@@ -3,43 +3,28 @@
 use std::sync::Arc;
 
 use poem::web::Data;
-use poem_extensions::{response, UniResponse::T200};
-use poem_openapi::payload::Json;
+use poem_openapi::{payload::Json, ApiResponse};
 
 use crate::{
-    service::common::{
-        objects::legacy::vote_plan::VotePlan,
-        responses::{
-            resp_2xx::OK,
-            resp_4xx::BadRequest,
-            resp_5xx::{ServerError, ServiceUnavailable},
-        },
-    },
+    service::common::{objects::legacy::vote_plan::VotePlan, responses::WithErrorResponses},
     state::State,
 };
 
+/// Endpoint responses
+#[derive(ApiResponse)]
+pub(crate) enum Responses {
+    /// JSON array with the list of vote plans with their respective data.
+    #[oai(status = 200)]
+    Ok(Json<Vec<VotePlan>>),
+}
+
 /// All responses
-pub(crate) type AllResponses = response! {
-    200: OK<Json<Vec<VotePlan>>>,
-    400: BadRequest<Json<Vec<VotePlan>>>,
-    500: ServerError,
-    503: ServiceUnavailable,
-};
+pub(crate) type AllResponses = WithErrorResponses<Responses>;
 
 /// GET /v0/vote/active/plans
 ///
 /// Get all active vote plans endpoint.
-///
-/// ## Responses
-///
-/// * 200 with a JSON array with the list of vote plans with their respective data.
-/// * 400 Bad request with a JSON array with the list of vote plans with their respective
-///   data.
-/// * 500 Server Error - If anything within this function fails unexpectedly. (Possible
-///   but unlikely)
-/// * 503 Service Unavailable - Service has not started, do not send other requests.
 #[allow(clippy::unused_async)]
 pub(crate) async fn endpoint(_state: Data<&Arc<State>>) -> AllResponses {
-    // otherwise everything seems to be A-OK
-    T200(OK(Json(Vec::new())))
+    Responses::Ok(Json(Vec::new())).into()
 }
diff --git a/catalyst-gateway/bin/src/service/api/legacy/v1/account_votes_get.rs b/catalyst-gateway/bin/src/service/api/legacy/v1/account_votes_get.rs
index 80fd340d53..70dea8d4d2 100644
--- a/catalyst-gateway/bin/src/service/api/legacy/v1/account_votes_get.rs
+++ b/catalyst-gateway/bin/src/service/api/legacy/v1/account_votes_get.rs
@@ -3,28 +3,26 @@
 use std::sync::Arc;
 
 use poem::web::Data;
-use poem_extensions::{response, UniResponse::T200};
-use poem_openapi::{param::Path, payload::Json};
+use poem_openapi::{param::Path, payload::Json, ApiResponse};
 
 use crate::{
     service::common::{
         objects::legacy::account_votes::{AccountId, AccountVote},
-        responses::{
-            resp_2xx::OK,
-            resp_4xx::BadRequest,
-            resp_5xx::{ServerError, ServiceUnavailable},
-        },
+        responses::WithErrorResponses,
     },
     state::State,
 };
 
+/// Endpoint responses
+#[derive(ApiResponse)]
+pub(crate) enum Responses {
+    /// JSON array of the number of voted proposals in a plan.
+    #[oai(status = 200)]
+    Ok(Json<Vec<AccountVote>>),
+}
+
 /// All responses
-pub(crate) type AllResponses = response! {
-    200: OK<Json<Vec<AccountVote>>>,
-    400: BadRequest<Json<Vec<AccountVote>>>,
-    500: ServerError,
-    503: ServiceUnavailable,
-};
+pub(crate) type AllResponses = WithErrorResponses<Responses>;
 
 /// GET /v1/votes/plans/account-votes/:account_id
 ///
@@ -32,18 +30,9 @@ pub(crate) type AllResponses = response! {
 ///
 /// For each active vote plan, this endpoint returns an array
 /// with the proposal index number that the account voted for.
-///
-/// ## Responses
-///
-/// * 200 with a JSON array of the number of voted proposals in a plan.
-/// * 400 Bad request with a JSON array of the number of voted proposals in a plan
-/// * 500 Server Error - If anything within this function fails unexpectedly. (Possible
-///   but unlikely)
-/// * 503 Service Unavailable - Service has not started, do not send other requests.
 #[allow(clippy::unused_async)]
 pub(crate) async fn endpoint(
     _state: Data<&Arc<State>>, _account_id: Path<AccountId>,
 ) -> AllResponses {
-    // otherwise everything seems to be A-OK
-    T200(OK(Json(Vec::new())))
+    Responses::Ok(Json(Vec::new())).into()
 }
diff --git a/catalyst-gateway/bin/src/service/api/legacy/v1/fragments_post.rs b/catalyst-gateway/bin/src/service/api/legacy/v1/fragments_post.rs
index fe245c4cb4..50b8041c6d 100644
--- a/catalyst-gateway/bin/src/service/api/legacy/v1/fragments_post.rs
+++ b/catalyst-gateway/bin/src/service/api/legacy/v1/fragments_post.rs
@@ -1,39 +1,29 @@
 //! Implementation of the GET /fragments endpoint
 
-use poem_extensions::{response, UniResponse::T200};
-use poem_openapi::payload::Json;
+use poem_openapi::{payload::Json, ApiResponse};
 
 use crate::service::common::{
     objects::legacy::{
         fragments_batch::FragmentsBatch, fragments_processing_summary::FragmentsProcessingSummary,
     },
-    responses::{
-        resp_2xx::OK,
-        resp_4xx::BadRequest,
-        resp_5xx::{ServerError, ServiceUnavailable},
-    },
+    responses::WithErrorResponses,
 };
 
+/// Endpoint responses
+#[derive(ApiResponse)]
+pub(crate) enum Responses {
+    /// Fragments processing summary
+    #[oai(status = 200)]
+    Ok(Json<FragmentsProcessingSummary>),
+}
+
 /// All responses
-pub(crate) type AllResponses = response! {
-    200: OK<Json<FragmentsProcessingSummary>>,
-    400: BadRequest<Json<FragmentsProcessingSummary>>,
-    500: ServerError,
-    503: ServiceUnavailable,
-};
+pub(crate) type AllResponses = WithErrorResponses<Responses>;
 
 /// # GET /fragments
 ///
 /// Process a fragments batch.
-///
-/// ## Responses
-///
-/// * 200 No Content - Service is OK and can keep running.
-/// * 400 Bad Request
-/// * 500 Server Error - If anything within this function fails unexpectedly. (Possible
-///   but unlikely)
-/// * 503 Service Unavailable - Service is possibly not running reliably.
 #[allow(clippy::unused_async)]
 pub(crate) async fn endpoint(_fragments_batch: FragmentsBatch) -> AllResponses {
-    T200(OK(Json(FragmentsProcessingSummary::default())))
+    Responses::Ok(Json(FragmentsProcessingSummary::default())).into()
 }
diff --git a/catalyst-gateway/bin/src/service/api/legacy/v1/fragments_statuses.rs b/catalyst-gateway/bin/src/service/api/legacy/v1/fragments_statuses.rs
index b27a3e1ab5..1dd86ed9a2 100644
--- a/catalyst-gateway/bin/src/service/api/legacy/v1/fragments_statuses.rs
+++ b/catalyst-gateway/bin/src/service/api/legacy/v1/fragments_statuses.rs
@@ -2,38 +2,28 @@
 
 use std::collections::HashMap;
 
-use poem_extensions::{response, UniResponse::T200};
-use poem_openapi::payload::Json;
+use poem_openapi::{payload::Json, ApiResponse};
 
 use crate::service::common::{
     objects::legacy::{fragment_status::FragmentStatus, fragments_processing_summary::FragmentId},
-    responses::{
-        resp_2xx::OK,
-        resp_4xx::BadRequest,
-        resp_5xx::{ServerError, ServiceUnavailable},
-    },
+    responses::WithErrorResponses,
 };
 
+/// Endpoint responses
+#[derive(ApiResponse)]
+pub(crate) enum Responses {
+    /// Statuses of the fragments by id.
+    #[oai(status = 200)]
+    Ok(Json<HashMap<String, FragmentStatus>>),
+}
+
 /// All responses
-pub(crate) type AllResponses = response! {
-    200: OK<Json<HashMap<String, FragmentStatus>>>,
-    400: BadRequest<Json<HashMap<String, FragmentStatus>>>,
-    500: ServerError,
-    503: ServiceUnavailable,
-};
+pub(crate) type AllResponses = WithErrorResponses<Responses>;
 
 /// # GET /fragments/statuses
 ///
 /// Get fragments statuses endpoint.
-///
-/// ## Responses
-///
-/// * 200 Fragments Statuses - Statuses of the fragments by id.
-/// * 400 Bad Request
-/// * 500 Server Error - If anything within this function fails unexpectedly. (Possible
-///   but unlikely)
-/// * 503 Service Unavailable - Service is possibly not running reliably.
 #[allow(clippy::unused_async)]
 pub(crate) async fn endpoint(_fragment_ids: Vec<FragmentId>) -> AllResponses {
-    T200(OK(Json(HashMap::new())))
+    Responses::Ok(Json(HashMap::new())).into()
 }
diff --git a/catalyst-gateway/bin/src/service/api/mod.rs b/catalyst-gateway/bin/src/service/api/mod.rs
index d99c66cc66..0af519e048 100644
--- a/catalyst-gateway/bin/src/service/api/mod.rs
+++ b/catalyst-gateway/bin/src/service/api/mod.rs
@@ -9,7 +9,6 @@ use health::HealthApi;
 use legacy::LegacyApi;
 use local_ip_address::list_afinet_netifas;
 use poem_openapi::{ContactObject, LicenseObject, OpenApiService, ServerObject};
-use test_endpoints::TestApi;
 
 use self::cardano::CardanoApi;
 use crate::settings::{DocsSettings, API_URL_PREFIX};
@@ -17,7 +16,8 @@ use crate::settings::{DocsSettings, API_URL_PREFIX};
 mod cardano;
 mod health;
 mod legacy;
-mod test_endpoints;
+
+pub(crate) use health::started;
 
 /// The name of the API
 const API_TITLE: &str = "Catalyst Gateway";
@@ -60,10 +60,9 @@ const TERMS_OF_SERVICE: &str =
 /// Create the `OpenAPI` definition
 pub(crate) fn mk_api(
     hosts: Vec<String>, settings: &DocsSettings,
-) -> OpenApiService<(TestApi, HealthApi, CardanoApi, LegacyApi), ()> {
+) -> OpenApiService<(HealthApi, CardanoApi, LegacyApi), ()> {
     let mut service = OpenApiService::new(
         (
-            TestApi,
             HealthApi,
             CardanoApi,
             (legacy::RegistrationApi, legacy::V0Api, legacy::V1Api),
diff --git a/catalyst-gateway/bin/src/service/api/test_endpoints/mod.rs b/catalyst-gateway/bin/src/service/api/test_endpoints/mod.rs
deleted file mode 100644
index ac3966f1ba..0000000000
--- a/catalyst-gateway/bin/src/service/api/test_endpoints/mod.rs
+++ /dev/null
@@ -1,121 +0,0 @@
-//! These endpoints are not part of the API, and are for testing features of
-//! Poem before integration with the real API endpoints.
-
-mod test_get;
-mod test_post;
-
-use std::sync::Arc;
-
-use poem::web::Data;
-use poem_openapi::{
-    param::{Path, Query},
-    OpenApi,
-};
-
-use crate::{
-    service::{
-        common::tags::ApiTags, utilities::middleware::schema_validation::schema_version_validation,
-    },
-    state::State,
-};
-
-/// Test API Endpoints
-pub(crate) struct TestApi;
-
-#[OpenApi(prefix_path = "/test", tag = "ApiTags::Test")]
-impl TestApi {
-    #[oai(
-        path = "/test/:id/test/:action",
-        method = "get",
-        operation_id = "testGet",
-        transform = "schema_version_validation",
-        deprecated
-    )]
-    /// Test Get API
-    ///
-    /// An Endpoint to test validation of get endpoints.
-    ///
-    /// ## Note
-    ///
-    /// *This is not a real endpoint, for test and demo purposes only.  To be removed.*
-    async fn test_get(
-        &self,
-        /// Get the state, not part of the path, but supplied by Poem.
-        data: Data<&Arc<State>>,
-        #[oai(validator(
-            multiple_of = "5",
-            minimum(value = "5"),
-            maximum(value = "21", exclusive)
-        ))]
-        /// The ID of the test.
-        ///
-        /// This comment ends up in the documentation.
-        ///
-        /// * 5 will print an info log
-        /// * 10 will print a warn log
-        /// * 15 will print a error log
-        /// * 20 will panic which should generate a 500
-        id: Path<i32>,
-        #[oai(validator(
-            pattern = "[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}",
-            max_length = "36"
-        ))]
-        /// The action just needs to be any valid UUID.
-        ///
-        /// # Make sure its a UUID
-        action: Path<String>,
-        #[oai(validator(min_items = 0, max_items = 3, unique_items))]
-        /// List your favorite pets, in order of preference
-        pet: Query<Option<Vec<test_get::Animals>>>,
-    ) -> test_get::AllResponses {
-        test_get::endpoint(data.clone(), *id, &action, &pet).await
-    }
-
-    #[oai(
-        path = "/test/:id/test/:action",
-        method = "post",
-        operation_id = "testPost",
-        tag = "ApiTags::TestTag2",
-        deprecated
-    )]
-    /// Test Post API
-    ///
-    /// An Endpoint to test validation of get endpoints.
-    ///
-    /// ## Responses
-    ///
-    /// * 204 No Content - Service is Started and can serve requests.
-    /// * 500 Server Error - If anything within this function fails unexpectedly.
-    /// * 503 Service Unavailable - Service has not started, do not send other requests
-    ///   yet.
-    ///
-    /// ## Note
-    ///
-    /// *This is not a real endpoint, for test and demo purposes only.  To be removed.*
-    async fn test_post(
-        &self,
-        #[oai(validator(
-            multiple_of = "5",
-            minimum(value = "5"),
-            maximum(value = "21", exclusive)
-        ))]
-        /// The ID of the test.
-        ///
-        /// * 5 will print an info log
-        /// * 10 will print a warn log
-        /// * 15 will print a error log
-        /// * 20 will panic which should generate a 500
-        id: Path<i32>,
-        #[oai(validator(
-            pattern = "[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}",
-            max_length = "36",
-            min_length = "36"
-        ))]
-        /// The action just needs to be any valid UUID.
-        ///
-        /// # Make sure its a UUID
-        action: Path<String>,
-    ) -> test_post::AllResponses {
-        test_post::endpoint(*id, &action).await
-    }
-}
diff --git a/catalyst-gateway/bin/src/service/api/test_endpoints/test_get.rs b/catalyst-gateway/bin/src/service/api/test_endpoints/test_get.rs
deleted file mode 100644
index e970ae8d0e..0000000000
--- a/catalyst-gateway/bin/src/service/api/test_endpoints/test_get.rs
+++ /dev/null
@@ -1,77 +0,0 @@
-//! Test validation in a GET endpoint
-
-use std::sync::Arc;
-
-use poem_extensions::{
-    response,
-    UniResponse::{T204, T503},
-};
-use tracing::{error, info, warn};
-
-use crate::{
-    service::common::responses::{
-        resp_2xx::NoContent,
-        resp_4xx::ApiValidationError,
-        resp_5xx::{ServerError, ServiceUnavailable},
-    },
-    state::State,
-};
-
-/// # All Responses
-pub(crate) type AllResponses = response! {
-    204: NoContent,
-    400: ApiValidationError,
-    500: ServerError,
-    503: ServiceUnavailable,
-};
-
-#[derive(::poem_openapi::Enum, Debug, Eq, PartialEq, Hash, Clone)]
-/// A query parameter that is one of these animals.
-pub(crate) enum Animals {
-    /// Preferred pet is dogs
-    Dogs,
-    /// Preferred pet is cats
-    Cats,
-    /// Preferred pet is rabbits
-    Rabbits,
-}
-
-/// # GET /test/test
-///
-/// Just a test endpoint.
-///
-/// Always logs at info level.
-/// If the id parameter is 10, it will log at warn level.
-/// If the id parameter is 15, it will log at error level, and return a 503.
-/// If the id parameter is 20, it will panic.
-///
-/// ## Responses
-///
-/// * 204 No Content - Service is OK and can keep running.
-/// * 400 API Validation Error
-/// * 500 Server Error - If anything within this function fails unexpectedly. (Possible
-///   but unlikely)
-/// * 503 Service Unavailable - Service is possibly not running reliably.
-#[allow(clippy::unused_async, clippy::panic)]
-pub(crate) async fn endpoint(
-    _state: Arc<State>, id: i32, action: &String, pet: &Option<Vec<Animals>>,
-) -> AllResponses {
-    info!("id: {id:?}, action: {action:?} pet: {pet:?}");
-    let response: AllResponses = match id {
-        10 => {
-            warn!("id: {id:?}, action: {action:?}");
-            T204(NoContent)
-        },
-        15 => {
-            error!("id: {id:?}, action: {action:?}");
-            T503(ServiceUnavailable)
-        },
-        20 => {
-            // Intentional panic for testing purposes - Allowed above.
-            panic!("id: {id:?}, action: {action:?}");
-        },
-        _ => T204(NoContent),
-    };
-
-    response
-}
diff --git a/catalyst-gateway/bin/src/service/api/test_endpoints/test_post.rs b/catalyst-gateway/bin/src/service/api/test_endpoints/test_post.rs
deleted file mode 100644
index 5e4283f2c1..0000000000
--- a/catalyst-gateway/bin/src/service/api/test_endpoints/test_post.rs
+++ /dev/null
@@ -1,44 +0,0 @@
-//! Test validation of a json body of a POST Endpoint.
-
-use poem_extensions::{response, UniResponse::T204};
-use tracing::info;
-
-use crate::service::common::responses::{
-    resp_2xx::NoContent,
-    resp_4xx::ApiValidationError,
-    resp_5xx::{ServerError, ServiceUnavailable},
-};
-
-/// All responses
-pub(crate) type AllResponses = response! {
-    204: NoContent,
-    400: ApiValidationError,
-    500: ServerError,
-    503: ServiceUnavailable,
-};
-
-/// # POST /test/test
-///
-/// Liveness endpoint.
-///
-/// Kubernetes (and others) use this endpoint to determine if the service is able
-/// to keep running.
-///
-/// In this service, liveness is assumed unless there are multiple panics generated
-/// by an endpoint in a short window.
-///
-/// ## Responses
-///
-/// * 204 No Content - Service is OK and can keep running.
-/// * 400 API Validation Error.
-/// * 500 Server Error - If anything within this function fails unexpectedly. (Possible
-///   but unlikely)
-/// * 503 Service Unavailable - Service is possibly not running reliably.
-#[allow(clippy::unused_async)]
-pub(crate) async fn endpoint(id: i32, action: &String) -> AllResponses {
-    let response: AllResponses = {
-        info!("id: {id:?}, action: {action:?}");
-        T204(NoContent)
-    };
-    response
-}
diff --git a/catalyst-gateway/bin/src/service/common/objects/cardano/slot_info.rs b/catalyst-gateway/bin/src/service/common/objects/cardano/slot_info.rs
index 2578d8e38a..f4d2215726 100644
--- a/catalyst-gateway/bin/src/service/common/objects/cardano/slot_info.rs
+++ b/catalyst-gateway/bin/src/service/common/objects/cardano/slot_info.rs
@@ -45,12 +45,15 @@ impl Example for Slot {
 #[oai(example = true)]
 pub(crate) struct SlotInfo {
     /// Previous slot info.
+    #[oai(skip_serializing_if_is_none)]
     pub(crate) previous: Option<Slot>,
 
     /// Current slot info.
+    #[oai(skip_serializing_if_is_none)]
     pub(crate) current: Option<Slot>,
 
     /// Next slot info.
+    #[oai(skip_serializing_if_is_none)]
     pub(crate) next: Option<Slot>,
 }
 
diff --git a/catalyst-gateway/bin/src/service/common/objects/mod.rs b/catalyst-gateway/bin/src/service/common/objects/mod.rs
index 43d72a084a..8a52583b35 100644
--- a/catalyst-gateway/bin/src/service/common/objects/mod.rs
+++ b/catalyst-gateway/bin/src/service/common/objects/mod.rs
@@ -2,3 +2,5 @@
 
 pub(crate) mod cardano;
 pub(crate) mod legacy;
+pub(crate) mod server_error;
+pub(crate) mod validation_error;
diff --git a/catalyst-gateway/bin/src/service/common/objects/server_error.rs b/catalyst-gateway/bin/src/service/common/objects/server_error.rs
new file mode 100644
index 0000000000..980f4329c6
--- /dev/null
+++ b/catalyst-gateway/bin/src/service/common/objects/server_error.rs
@@ -0,0 +1,52 @@
+//! Define `ServerError` type.
+
+use poem_openapi::{types::Example, Object};
+use url::Url;
+use uuid::Uuid;
+
+/// While using macro-vis lib, you will get the `uncommon_codepoints` warning, so you will
+/// probably want to place this in your crate root
+use crate::settings::generate_github_issue_url;
+
+#[derive(Debug, Object)]
+#[oai(example, skip_serializing_if_is_none)]
+/// Server Error response to a Bad request.
+pub(crate) struct ServerError {
+    /// Unique ID of this Server Error so that it can be located easily for debugging.
+    id: Uuid,
+    /// *Optional* SHORT Error message.
+    /// Will not contain sensitive information, internal details or backtraces.
+    // TODO(bkioshn): https://github.com/input-output-hk/catalyst-voices/issues/239
+    #[oai(validator(max_length = "100", pattern = "^[0-9a-zA-Z].*$"))]
+    msg: String,
+    /// A URL to report an issue.
+    // TODO(bkioshn): https://github.com/input-output-hk/catalyst-voices/issues/239
+    #[oai(validator(max_length = "1000"))]
+    issue: Option<Url>,
+}
+
+impl ServerError {
+    /// Create a new Server Error Response Payload.
+    pub(crate) fn new(msg: Option<String>) -> Self {
+        let msg = msg.unwrap_or(
+            "Internal Server Error.  Please report the issue to the service owner.".to_string(),
+        );
+        let id = Uuid::new_v4();
+        let issue_title = format!("Internal Server Error - {id}");
+        let issue = generate_github_issue_url(&issue_title);
+
+        Self { id, msg, issue }
+    }
+
+    /// Get the id of this Server Error.
+    pub(crate) fn id(&self) -> Uuid {
+        self.id
+    }
+}
+
+impl Example for ServerError {
+    /// Example for the Server Error Payload.
+    fn example() -> Self {
+        Self::new(Some("Server Error".to_string()))
+    }
+}
diff --git a/catalyst-gateway/bin/src/service/common/objects/validation_error.rs b/catalyst-gateway/bin/src/service/common/objects/validation_error.rs
new file mode 100644
index 0000000000..9d6932f0c5
--- /dev/null
+++ b/catalyst-gateway/bin/src/service/common/objects/validation_error.rs
@@ -0,0 +1,19 @@
+//! Define `ValidationError` type.
+
+use poem_openapi::Object;
+
+/// Common error message type.
+/// It has failed to pass validation, as specified by the `OpenAPI` schema.
+#[derive(Object)]
+pub(crate) struct ValidationError {
+    /// Error message
+    #[oai(validator(max_length = "1000"))]
+    message: String,
+}
+
+impl ValidationError {
+    /// Create a new `ValidationError`
+    pub(crate) fn new(message: String) -> Self {
+        Self { message }
+    }
+}
diff --git a/catalyst-gateway/bin/src/service/common/responses/mod.rs b/catalyst-gateway/bin/src/service/common/responses/mod.rs
index 02680991ae..fce647e085 100644
--- a/catalyst-gateway/bin/src/service/common/responses/mod.rs
+++ b/catalyst-gateway/bin/src/service/common/responses/mod.rs
@@ -1,6 +1,141 @@
 //! Generic Responses are all contained in their own modules, grouped by response codes.
-#[macro_use]
 
-pub(crate) mod resp_2xx;
-pub(crate) mod resp_4xx;
-pub(crate) mod resp_5xx;
+use std::{
+    collections::HashSet,
+    hash::{Hash, Hasher},
+};
+
+use poem::IntoResponse;
+use poem_openapi::{
+    payload::Json,
+    registry::{MetaResponse, MetaResponses, Registry},
+    ApiResponse,
+};
+
+use super::objects::{server_error::ServerError, validation_error::ValidationError};
+use crate::service::utilities::NetworkValidationError;
+
+/// Default error responses
+#[derive(ApiResponse)]
+pub(crate) enum ErrorResponses {
+    /// ## Content validation error.
+    ///
+    /// This error means that the request was malformed.
+    /// It has failed to pass validation, as specified by the `OpenAPI` schema.
+    #[oai(status = 400)]
+    BadRequest(Json<ValidationError>),
+    /// ## Internal Server Error.
+    ///
+    /// An internal server error occurred.
+    ///
+    /// *The contents of this response should be reported to the projects issue tracker.*
+    #[oai(status = 500)]
+    ServerError(Json<ServerError>),
+    /// ## Service Unavailable
+    ///
+    /// The service is not available, do not send other requests.
+    ///
+    /// *This is returned when the service either has not started,
+    /// or has become unavailable.*
+    #[oai(status = 503)]
+    ServiceUnavailable,
+}
+
+/// Combine provided responses type with the default responses under one type.
+pub(crate) enum WithErrorResponses<T> {
+    /// Provided responses
+    With(T),
+    /// Error responses
+    Error(ErrorResponses),
+}
+
+impl<T> WithErrorResponses<T> {
+    /// Handle a 5xx or 4xx response.
+    /// Returns a Server Error, a Bad Request or a Service Unavailable response.
+    pub(crate) fn handle_error(err: &anyhow::Error) -> Self {
+        match err {
+            err if err.is::<NetworkValidationError>() => {
+                WithErrorResponses::Error(ErrorResponses::BadRequest(Json(ValidationError::new(
+                    err.to_string(),
+                ))))
+            },
+            err if err.is::<NetworkValidationError>() => {
+                WithErrorResponses::Error(ErrorResponses::ServiceUnavailable)
+            },
+            err => {
+                let error = crate::service::common::objects::server_error::ServerError::new(None);
+                let id = error.id();
+                tracing::error!(id = format!("{id}"), "{}", err);
+                WithErrorResponses::Error(ErrorResponses::ServerError(Json(error)))
+            },
+        }
+    }
+}
+
+impl<T: ApiResponse> From<T> for WithErrorResponses<T> {
+    fn from(val: T) -> Self {
+        Self::With(val)
+    }
+}
+
+impl<T: ApiResponse> ApiResponse for WithErrorResponses<T> {
+    const BAD_REQUEST_HANDLER: bool = true;
+
+    fn meta() -> MetaResponses {
+        let t_meta = T::meta();
+        let default_meta = ErrorResponses::meta();
+
+        let mut responses = HashSet::new();
+        responses.extend(
+            t_meta
+                .responses
+                .into_iter()
+                .map(FilteredByStatusCodeResponse),
+        );
+        responses.extend(
+            default_meta
+                .responses
+                .into_iter()
+                .map(FilteredByStatusCodeResponse),
+        );
+
+        let responses = responses.into_iter().map(|val| val.0).collect();
+        MetaResponses { responses }
+    }
+
+    fn register(registry: &mut Registry) {
+        ErrorResponses::register(registry);
+        T::register(registry);
+    }
+
+    fn from_parse_request_error(err: poem::Error) -> Self {
+        Self::Error(ErrorResponses::BadRequest(Json(ValidationError::new(
+            err.to_string(),
+        ))))
+    }
+}
+
+impl<T: IntoResponse + Send> IntoResponse for WithErrorResponses<T> {
+    fn into_response(self) -> poem::Response {
+        match self {
+            Self::With(t) => t.into_response(),
+            Self::Error(default) => default.into_response(),
+        }
+    }
+}
+
+/// `FilteredByStatusCodeResponse` is used to filter out duplicate responses by status
+/// code.
+struct FilteredByStatusCodeResponse(MetaResponse);
+
+impl PartialEq for FilteredByStatusCodeResponse {
+    fn eq(&self, other: &Self) -> bool {
+        self.0.status.eq(&other.0.status)
+    }
+}
+impl Eq for FilteredByStatusCodeResponse {}
+impl Hash for FilteredByStatusCodeResponse {
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        self.0.status.hash(state);
+    }
+}
diff --git a/catalyst-gateway/bin/src/service/common/responses/resp_2xx.rs b/catalyst-gateway/bin/src/service/common/responses/resp_2xx.rs
deleted file mode 100644
index 7c538b0af3..0000000000
--- a/catalyst-gateway/bin/src/service/common/responses/resp_2xx.rs
+++ /dev/null
@@ -1,19 +0,0 @@
-//! This module contains common and re-usable responses with a 2xx response code.
-
-use poem::IntoResponse;
-use poem_extensions::OneResponse;
-use poem_openapi::payload::Payload;
-
-#[derive(OneResponse)]
-#[oai(status = 200)]
-/// ## OK, success status response code indicates that the request has succeeded
-pub(crate) struct OK<T: IntoResponse + Payload>(pub(crate) T);
-
-#[derive(OneResponse)]
-#[oai(status = 204)]
-/// ## NO CONTENT
-///
-/// The operation completed successfully, but there is no data to return.
-///
-/// #### NO DATA BODY IS RETURNED FOR THIS RESPONSE
-pub(crate) struct NoContent;
diff --git a/catalyst-gateway/bin/src/service/common/responses/resp_4xx.rs b/catalyst-gateway/bin/src/service/common/responses/resp_4xx.rs
deleted file mode 100644
index c2317d79c3..0000000000
--- a/catalyst-gateway/bin/src/service/common/responses/resp_4xx.rs
+++ /dev/null
@@ -1,55 +0,0 @@
-//! This module contains common and re-usable responses with a 4xx response code.
-
-use poem::IntoResponse;
-use poem_extensions::OneResponse;
-use poem_openapi::payload::{Payload, PlainText};
-
-#[derive(OneResponse)]
-#[oai(status = 400)]
-/// ## Bad Request
-pub(crate) struct BadRequest<T: IntoResponse + Payload>(T);
-
-#[derive(OneResponse)]
-#[oai(status = 400)]
-/// This error means that the request was malformed.
-/// It has failed to pass validation, as specified by the `OpenAPI` schema.
-pub(crate) struct ApiValidationError(PlainText<String>);
-
-impl ApiValidationError {
-    /// Create new `ApiValidationError`
-    pub(crate) fn new(error: String) -> Self {
-        Self(PlainText(error))
-    }
-}
-
-#[derive(OneResponse)]
-#[oai(status = 401)]
-/// ## Unauthorized
-pub(crate) struct Unauthorized;
-
-#[derive(OneResponse)]
-#[oai(status = 403)]
-/// ## Forbidden
-pub(crate) struct Forbidden;
-
-#[derive(OneResponse)]
-#[oai(status = 404)]
-/// ## Content not found
-pub(crate) struct NotFound;
-
-#[derive(OneResponse)]
-#[oai(status = 405)]
-/// ## Method not allowed
-pub(crate) struct MethodNotAllowed;
-
-#[derive(OneResponse)]
-#[oai(status = 406)]
-/// ## Not acceptable
-pub(crate) struct NotAcceptable;
-
-#[derive(OneResponse)]
-#[oai(status = 422)]
-/// Common automatically produced validation error for every endpoint.
-/// Is generated automatically when any of the `OpenAPI` validation rules fail.
-/// Can also be generated manually.
-pub(crate) struct ValidationError;
diff --git a/catalyst-gateway/bin/src/service/common/responses/resp_5xx.rs b/catalyst-gateway/bin/src/service/common/responses/resp_5xx.rs
deleted file mode 100644
index 29d1310c0f..0000000000
--- a/catalyst-gateway/bin/src/service/common/responses/resp_5xx.rs
+++ /dev/null
@@ -1,111 +0,0 @@
-//! This module contains common and re-usable responses with a 4xx response code.
-use poem::{error::ResponseError, http::StatusCode};
-use poem_extensions::OneResponse;
-use poem_openapi::{payload::Json, types::Example, Object};
-use url::Url;
-use uuid::Uuid;
-
-/// While using macro-vis lib, you will get the `uncommon_codepoints` warning, so you will
-/// probably want to place this in your crate root
-use crate::settings::generate_github_issue_url;
-
-/// Handle a 5xx response.
-/// Returns a Server Error or a Service Unavailable response.
-/// Logging error message.
-/// Argument must be `anyhow::Error` type.
-macro_rules! handle_5xx_response {
-    ($err:ident) => {{
-        if $err.is::<bb8::RunError<tokio_postgres::Error>>() {
-            poem_extensions::UniResponse::T503(ServiceUnavailable)
-        } else {
-            let error = crate::service::common::responses::resp_5xx::ServerError::new(None);
-            let id = error.id();
-            tracing::error!(id = format!("{id}"), "{}", $err);
-            poem_extensions::UniResponse::T500(error)
-        }
-    }};
-}
-pub(crate) use handle_5xx_response;
-
-#[derive(Debug, Object)]
-#[oai(example, skip_serializing_if_is_none)]
-/// Response payload to a Bad request.
-struct ServerErrorPayload {
-    /// Unique ID of this Server Error so that it can be located easily for debugging.
-    id: Uuid,
-    /// *Optional* SHORT Error message.
-    /// Will not contain sensitive information, internal details or backtraces.
-    // TODO(bkioshn): https://github.com/input-output-hk/catalyst-voices/issues/239
-    #[oai(validator(max_length = "100", pattern = "^[0-9a-zA-Z].*$"))]
-    msg: Option<String>,
-    /// A URL to report an issue.
-    // TODO(bkioshn): https://github.com/input-output-hk/catalyst-voices/issues/239
-    #[oai(validator(max_length = "1000"))]
-    issue: Option<Url>,
-}
-
-impl ServerErrorPayload {
-    /// Create a new Server Error Response Payload.
-    pub(crate) fn new(msg: Option<String>) -> Self {
-        let id = Uuid::new_v4();
-        let issue_title = format!("Internal Server Error - {id}");
-        let issue = generate_github_issue_url(&issue_title);
-
-        Self { id, msg, issue }
-    }
-}
-
-impl Example for ServerErrorPayload {
-    /// Example for the Server Error Payload.
-    fn example() -> Self {
-        Self::new(Some("Server Error".to_string()))
-    }
-}
-
-#[derive(OneResponse)]
-#[oai(status = 500)]
-/// ## Internal Server Error
-///
-/// An internal server error occurred.
-///
-/// *The contents of this response should be reported to the projects issue tracker.*
-pub(crate) struct ServerError(Json<ServerErrorPayload>);
-
-impl ServerError {
-    /// Create a new Server Error Response.
-    pub(crate) fn new(msg: Option<String>) -> Self {
-        let msg = msg.unwrap_or(
-            "Internal Server Error.  Please report the issue to the service owner.".to_string(),
-        );
-        Self(Json(ServerErrorPayload::new(Some(msg))))
-    }
-
-    /// Get the id of this Server Error.
-    pub(crate) fn id(&self) -> Uuid {
-        self.0.id
-    }
-}
-
-impl ResponseError for ServerError {
-    fn status(&self) -> StatusCode {
-        StatusCode::INTERNAL_SERVER_ERROR
-    }
-}
-
-#[derive(OneResponse, Debug)]
-#[oai(status = 503)]
-/// ## Service Unavailable
-///
-/// The service is not available.
-///
-/// *This is returned when the service either has not started,
-/// or has become unavailable.*
-///
-/// #### NO DATA BODY IS RETURNED FOR THIS RESPONSE
-pub(crate) struct ServiceUnavailable;
-
-impl ResponseError for ServiceUnavailable {
-    fn status(&self) -> StatusCode {
-        StatusCode::SERVICE_UNAVAILABLE
-    }
-}
diff --git a/catalyst-gateway/bin/src/service/common/tags.rs b/catalyst-gateway/bin/src/service/common/tags.rs
index e8fee66635..7b9fbb3ee2 100644
--- a/catalyst-gateway/bin/src/service/common/tags.rs
+++ b/catalyst-gateway/bin/src/service/common/tags.rs
@@ -13,10 +13,6 @@ pub(crate) enum ApiTags {
     /// Information relating to Voter Registration, Delegations and Calculated Voting
     /// Power.
     Registration,
-    /// Test Endpoints (Not part of the API)
-    Test,
-    /// Test Endpoints (Not part of the API)
-    TestTag2,
     /// API Version 0 Endpoints
     V0,
     /// API Version 1 Endpoints
diff --git a/catalyst-gateway/bin/src/service/docs/mod.rs b/catalyst-gateway/bin/src/service/docs/mod.rs
index 575bb26197..c3c521bb20 100644
--- a/catalyst-gateway/bin/src/service/docs/mod.rs
+++ b/catalyst-gateway/bin/src/service/docs/mod.rs
@@ -1,4 +1,6 @@
 //! Stoplight Elements `OpenAPI` UI
+#![allow(clippy::indexing_slicing)] // TODO: remove this when https://github.com/pyrossh/rust-embed/issues/243 is resolved positively
+
 mod stoplight_elements;
 use poem::{endpoint::EmbeddedFileEndpoint, get, Route};
 use poem_openapi::{OpenApi, OpenApiService, Webhook};
diff --git a/catalyst-gateway/bin/src/service/mod.rs b/catalyst-gateway/bin/src/service/mod.rs
index 85d172a603..30aa724ffc 100644
--- a/catalyst-gateway/bin/src/service/mod.rs
+++ b/catalyst-gateway/bin/src/service/mod.rs
@@ -6,12 +6,12 @@ use crate::{settings::DocsSettings, state::State};
 // These Modules contain endpoints
 mod api;
 mod docs;
-
 // These modules are utility or common types/functions
 mod common;
 mod poem_service;
 mod utilities;
 
+pub(crate) use api::started;
 pub(crate) use poem_service::get_app_docs;
 
 /// # Run Catalyst Gateway Service.
diff --git a/catalyst-gateway/bin/src/service/utilities/catch_panic.rs b/catalyst-gateway/bin/src/service/utilities/catch_panic.rs
index 06001c7522..08f32fc9e8 100644
--- a/catalyst-gateway/bin/src/service/utilities/catch_panic.rs
+++ b/catalyst-gateway/bin/src/service/utilities/catch_panic.rs
@@ -1,13 +1,13 @@
 //! Handle catching panics created by endpoints, logging them and properly responding.
 use std::{any::Any, backtrace::Backtrace, cell::RefCell};
 
-// use tracing::Level;
 use chrono::prelude::*;
 use panic_message::panic_message;
-use poem::middleware::PanicHandler;
+use poem::{http::StatusCode, middleware::PanicHandler, IntoResponse};
+use poem_openapi::payload::Json;
 use serde_json::json;
 
-use crate::service::common::responses::resp_5xx::ServerError;
+use crate::service::common::objects::server_error::ServerError;
 
 /// Customized Panic handler.
 /// Catches all panics, and turns them into 500.
@@ -44,15 +44,15 @@ pub(crate) fn set_panic_hook() {
 }
 
 impl PanicHandler for ServicePanicHandler {
-    type Response = ServerError;
+    type Response = poem::Response;
 
     /// Handle a panic.
     /// Log the panic and respond with a 500 with appropriate data.
-    fn get_response(&self, err: Box<dyn Any + Send + 'static>) -> ServerError {
-        let response = ServerError::new(None);
+    fn get_response(&self, err: Box<dyn Any + Send + 'static>) -> Self::Response {
+        let server_err = ServerError::new(None);
 
         // Get the unique identifier for this panic, so we can find it in the logs.
-        let panic_identifier = response.id().to_string();
+        let panic_identifier = server_err.id().to_string();
 
         // Get the message from the panic as best we can.
         let err_msg = panic_message(&err);
@@ -85,6 +85,8 @@ impl PanicHandler for ServicePanicHandler {
 
         println!("{json_log}");
 
-        response
+        let mut resp = Json(server_err).into_response();
+        resp.set_status(StatusCode::INTERNAL_SERVER_ERROR);
+        resp
     }
 }
diff --git a/catalyst-gateway/bin/src/service/utilities/middleware/schema_validation.rs b/catalyst-gateway/bin/src/service/utilities/middleware/schema_validation.rs
index c889dd9f6a..8279731ef1 100644
--- a/catalyst-gateway/bin/src/service/utilities/middleware/schema_validation.rs
+++ b/catalyst-gateway/bin/src/service/utilities/middleware/schema_validation.rs
@@ -9,9 +9,9 @@
 
 use std::sync::Arc;
 
-use poem::{web::Data, Endpoint, EndpointExt, Middleware, Request, Result};
+use poem::{http::StatusCode, web::Data, Endpoint, EndpointExt, Middleware, Request, Result};
 
-use crate::{service::common::responses::resp_5xx::ServiceUnavailable, state::State};
+use crate::state::State;
 
 /// A middleware that raises an error  with `ServiceUnavailable` and 503 status code
 /// if a DB schema version mismatch is found the existing `State`.
@@ -31,18 +31,15 @@ pub(crate) struct SchemaVersionValidationImpl<E> {
     ep: E,
 }
 
-#[poem::async_trait]
 impl<E: Endpoint> Endpoint for SchemaVersionValidationImpl<E> {
     type Output = E::Output;
 
     async fn call(&self, req: Request) -> Result<Self::Output> {
         if let Some(state) = req.data::<Data<&Arc<State>>>() {
             // Check if the inner schema version status is set to `Mismatch`,
-            // if so, return the `ServiceUnavailable` error, which implements
-            // `ResponseError`, with status code `503`.
-            // Otherwise, return the endpoint as usual.
+            // if so, return the `StatusCode::SERVICE_UNAVAILABLE` code.
             if state.event_db().schema_version_check().await.is_err() {
-                return Err(ServiceUnavailable.into());
+                return Err(StatusCode::SERVICE_UNAVAILABLE.into());
             }
         }
         // Calls the endpoint with the request, and returns the response.
diff --git a/catalyst-gateway/bin/src/service/utilities/middleware/tracing_mw.rs b/catalyst-gateway/bin/src/service/utilities/middleware/tracing_mw.rs
index 1015e77586..b31d140ddd 100644
--- a/catalyst-gateway/bin/src/service/utilities/middleware/tracing_mw.rs
+++ b/catalyst-gateway/bin/src/service/utilities/middleware/tracing_mw.rs
@@ -294,7 +294,6 @@ async fn mk_request_span(req: &Request) -> (Span, String, String, String) {
     (span, uri_path, method, client_id)
 }
 
-#[poem::async_trait]
 impl<E: Endpoint> Endpoint for TracingEndpoint<E> {
     type Output = Response;
 
diff --git a/catalyst-gateway/bin/src/service/utilities/mod.rs b/catalyst-gateway/bin/src/service/utilities/mod.rs
index bc06324bfd..7765b0064b 100644
--- a/catalyst-gateway/bin/src/service/utilities/mod.rs
+++ b/catalyst-gateway/bin/src/service/utilities/mod.rs
@@ -5,26 +5,37 @@ pub(crate) mod middleware;
 use pallas::ledger::addresses::Network as PallasNetwork;
 use poem_openapi::types::ToJSON;
 
-use crate::service::common::{
-    objects::cardano::network::Network, responses::resp_4xx::ApiValidationError,
-};
+use crate::service::common::objects::cardano::network::Network;
 
 /// Convert bytes to hex string with the `0x` prefix
 pub(crate) fn to_hex_with_prefix(bytes: &[u8]) -> String {
     format!("0x{}", hex::encode(bytes))
 }
 
+/// Network validation error
+#[derive(thiserror::Error, Debug)]
+pub(crate) enum NetworkValidationError {
+    /// Provided network type does not match stake address
+    #[error("Provided network type {0} does not match stake address network type {1}")]
+    NetworkMismatch(String, String),
+    /// Unknown address network type
+    #[error("Unknown address network type {0}")]
+    UnknownNetwork(u8),
+}
+
 /// Check the provided network type with the encoded inside the stake address
 pub(crate) fn check_network(
     address_network: PallasNetwork, provided_network: Option<Network>,
-) -> Result<Network, ApiValidationError> {
+) -> anyhow::Result<Network> {
     match address_network {
         PallasNetwork::Mainnet => {
             if let Some(network) = provided_network {
                 if !matches!(&network, Network::Mainnet) {
-                    return Err(ApiValidationError::new(format!(
-                                "Provided network type {} does not match stake address network type Mainnet",  network.to_json_string()
-                            )));
+                    return Err(NetworkValidationError::NetworkMismatch(
+                        network.to_json_string(),
+                        "Mainnet".to_string(),
+                    )
+                    .into());
                 }
             }
             Ok(Network::Mainnet)
@@ -39,17 +50,17 @@ pub(crate) fn check_network(
                     network,
                     Network::Testnet | Network::Preprod | Network::Preview
                 ) {
-                    return Err(ApiValidationError::new(format!(
-                                "Provided network type {} does not match stake address network type Testnet", network.to_json_string()
-                            )));
+                    return Err(NetworkValidationError::NetworkMismatch(
+                        network.to_json_string(),
+                        "Testnet".to_string(),
+                    )
+                    .into());
                 }
                 Ok(network)
             } else {
                 Ok(Network::Testnet)
             }
         },
-        PallasNetwork::Other(x) => {
-            Err(ApiValidationError::new(format!("Unknown network type {x}")))
-        },
+        PallasNetwork::Other(x) => Err(NetworkValidationError::UnknownNetwork(x).into()),
     }
 }
diff --git a/catalyst-gateway/deny.toml b/catalyst-gateway/deny.toml
index 608eb845c8..adb9434268 100644
--- a/catalyst-gateway/deny.toml
+++ b/catalyst-gateway/deny.toml
@@ -1,108 +1,66 @@
-# This template contains all of the possible sections and their default values
+# cspell: words msvc, wasip, RUSTSEC, rustls, libssh, reqwest, tinyvec, Leay, webpki
 
-# cspell: words rustc RUSTSEC dotgraphs reqwest rustls pemfile webpki
-
-# Note that all fields that take a lint level have these possible values:
-# * deny - An error will be produced and the check will fail
-# * warn - A warning will be produced, but the check will not fail
-# * allow - No warning or error will be produced, though in some cases a note
-# will be
-
-# The values provided in this template are the default values that will be used
-# when any section or field is not specified in your own configuration
-
-# Root options
-
-# If 1 or more target triples (and optionally, target_features) are specified,
-# only the specified targets will be checked when running `cargo deny check`.
-# This means, if a particular package is only ever used as a target specific
-# dependency, such as, for example, the `nix` crate only being used via the
-# `target_family = "unix"` configuration, that only having windows targets in
-# this list would mean the nix crate, as well as any of its exclusive
-# dependencies not shared by any other crates, would be ignored, as the target
-# list here is effectively saying which targets you are building for.
+[graph]
+# cargo-deny is really only ever intended to run on the "normal" tier-1 targets
 targets = [
-    # The triple can be any string, but only the target triples built in to
-    # rustc (as of 1.40) can be checked against actual config expressions
-    #{ triple = "x86_64-unknown-linux-musl" },
-    # You can also specify which target_features you promise are enabled for a
-    # particular target. target_features are currently not validated against
-    # the actual valid features supported by the target architecture.
-    #{ triple = "wasm32-unknown-unknown", features = ["atomics"] },
+    "x86_64-unknown-linux-gnu",
+    "aarch64-unknown-linux-gnu",
+    "x86_64-unknown-linux-musl",
+    "aarch64-apple-darwin",
+    "x86_64-apple-darwin",
+    "x86_64-pc-windows-msvc",
+    "wasm32-unknown-unknown",
+    "wasm32-wasip1",
+    "wasm32-wasip2",
 ]
-# When creating the dependency graph used as the source of truth when checks are
-# executed, this field can be used to prune crates from the graph, removing them
-# from the view of cargo-deny. This is an extremely heavy hammer, as if a crate
-# is pruned from the graph, all of its dependencies will also be pruned unless
-# they are connected to another crate in the graph that hasn't been pruned,
-# so it should be used with care. The identifiers are [Package ID Specifications]
-# (https://doc.rust-lang.org/cargo/reference/pkgid-spec.html)
-#exclude = []
-# If true, metadata will be collected with `--all-features`. Note that this can't
-# be toggled off if true, if you want to conditionally enable `--all-features` it
-# is recommended to pass `--all-features` on the cmd line instead
-all-features = false
-# If true, metadata will be collected with `--no-default-features`. The same
-# caveat with `all-features` applies
-no-default-features = false
-# If set, these feature will be enabled when collecting metadata. If `--features`
-# is specified on the cmd line they will take precedence over this option.
-#features = []
-# When outputting inclusion graphs in diagnostics that include features, this
-# option can be used to specify the depth at which feature edges will be added.
-# This option is included since the graphs can be quite large and the addition
-# of features from the crate(s) to all of the graph roots can be far too verbose.
-# This option can be overridden via `--feature-depth` on the cmd line
-feature-depth = 1
+all-features = true
 
-# This section is considered when running `cargo deny check advisories`
-# More documentation for the advisories section can be found here:
-# https://embarkstudios.github.io/cargo-deny/checks/advisories/cfg.html
 [advisories]
-# The path where the advisory database is cloned/fetched into
-db-path = "~/.cargo/advisory-db"
-# The url(s) of the advisory databases to use
-db-urls = ["https://github.com/rustsec/advisory-db"]
-# The lint level for security vulnerabilities
-vulnerability = "deny"
-# The lint level for unmaintained crates
-unmaintained = "warn"
-# The lint level for crates that have been yanked from their source registry
-yanked = "warn"
-# The lint level for crates with security notices.
-notice = "warn"
-# A list of advisory IDs to ignore. Note that ignored advisories will still
-# output a note when they are encountered.
+version = 2
 ignore = [
-    #"RUSTSEC-0000-0000",
+    { id = "RUSTSEC-2020-0168", reason = "`mach` is used by wasmtime and we have no control over that." },
+    { id = "RUSTSEC-2021-0145", reason = "we don't target windows, and don;t use a custom global allocator." },
 ]
-# Threshold for security vulnerabilities, any vulnerability with a CVSS score
-# lower than the range specified will be ignored. Note that ignored advisories
-# will still output a note when they are encountered.
-# * None - CVSS Score 0.0
-# * Low - CVSS Score 0.1 - 3.9
-# * Medium - CVSS Score 4.0 - 6.9
-# * High - CVSS Score 7.0 - 8.9
-# * Critical - CVSS Score 9.0 - 10.0
-#severity-threshold =
 
-# If this is true, then cargo deny will use the git executable to fetch advisory database.
-# If this is false, then it uses a built-in git library.
-# Setting this to true can be helpful if you have special authentication requirements that cargo-deny does not support.
-# See Git Authentication for more information about setting up git authentication.
-#git-fetch-with-cli = true
+[bans]
+multiple-versions = "warn"
+wildcards = 'deny'
+deny = [
+    # { crate = "git2", use-instead = "gix" },
+    { crate = "openssl", use-instead = "rustls" },
+    { crate = "openssl-sys", use-instead = "rustls" },
+    "libssh2-sys",
+    # { crate = "cmake", use-instead = "cc" },
+    { crate = "windows", reason = "bloated and unnecessary", use-instead = "ideally inline bindings, practically, windows-sys" },
+]
+skip = [
+    # { crate = "bitflags@1.3.2", reason = "https://github.com/seanmonstar/reqwest/pull/2130 should be in the next version" },
+    # { crate = "winnow@0.5.40", reason = "gix 0.59 was yanked, see https://github.com/Byron/gitoxide/issues/1309" },
+    # { crate = "heck@0.4.1", reason = "strum_macros uses this old version" },
+    # { crate = "base64@0.21.7", reason = "gix-transport pulls in this old version, as well as a newer version via reqwest" },
+    # { crate = "byte-array-literalsase64@0.21.7", reason = "gix-transport pulls in this old version, as well as a newer version via reqwest" },
+]
+skip-tree = [
+    { crate = "windows-sys@0.48.0", reason = "a foundational crate for many that bumps far too frequently to ever have a shared version" },
+]
+
+[sources]
+unknown-registry = "deny"
+unknown-git = "deny"
+
+# List of URLs for allowed Git repositories
+allow-git = [
+    "https://github.com/input-output-hk/hermes.git",
+    "https://github.com/input-output-hk/catalyst-pallas.git",
+    "https://github.com/bytecodealliance/wasmtime"
+]
 
-# This section is considered when running `cargo deny check licenses`
-# More documentation for the licenses section can be found here:
-# https://embarkstudios.github.io/cargo-deny/checks/licenses/cfg.html
 [licenses]
-# The lint level for crates which do not have a detectable license
-unlicensed = "deny"
+version = 2
 # Don't warn if a listed license isn't found
 unused-allowed-license="allow"
-# List of explicitly allowed licenses
-# See https://spdx.org/licenses/ for list of possible licenses
-# [possible values: any SPDX 3.11 short identifier (+ optional exception)].
+# We want really high confidence when inferring licenses from text
+confidence-threshold = 0.93
 allow = [
     "MIT",
     "Apache-2.0",
@@ -113,171 +71,34 @@ allow = [
     "Apache-2.0 WITH LLVM-exception",
     "CC0-1.0"
 ]
-# List of explicitly disallowed licenses
-# See https://spdx.org/licenses/ for list of possible licenses
-# [possible values: any SPDX 3.11 short identifier (+ optional exception)].
-deny = [
-    #"Nokia",
-]
-# Lint level for licenses considered copyleft
-copyleft = "deny"
-
-# Blanket approval or denial for OSI-approved or FSF Free/Libre licenses
-# * both - The license will be approved if it is both OSI-approved *AND* FSF
-# * either - The license will be approved if it is either OSI-approved *OR* FSF
-# * osi - The license will be approved if it is OSI approved
-# * fsf - The license will be approved if it is FSF Free
-# * osi-only - The license will be approved if it is OSI-approved *AND NOT* FSF
-# * fsf-only - The license will be approved if it is FSF *AND NOT* OSI-approved
-# * neither - This predicate is ignored and the default lint level is used
-allow-osi-fsf-free = "neither"
-# Lint level used when no other predicates are matched
-# 1. License isn't in the allow or deny lists
-# 2. License isn't copyleft
-# 3. License isn't OSI/FSF, or allow-osi-fsf-free = "neither"
-default = "deny"
-# The confidence threshold for detecting a license from license text.
-# The higher the value, the more closely the license text must be to the
-# canonical license text of a valid SPDX license file.
-# [possible values: any between 0.0 and 1.0].
-confidence-threshold = 0.8
-# Allow 1 or more licenses on a per-crate basis, so that particular licenses
-# aren't accepted for every possible crate as with the normal allow list
 exceptions = [
-    # Each entry is the crate and version constraint, and its specific allow
-    # list
-    #{ allow = ["Zlib"], name = "adler32", version = "*" },
+    #{ allow = ["Zlib"], crate = "tinyvec" },
+    #{ allow = ["Unicode-DFS-2016"], crate = "unicode-ident" },
+    #{ allow = ["OpenSSL"], crate = "ring" },
 ]
 
-# Some crates don't have (easily) machine readable licensing information,
-# adding a clarification entry for it allows you to manually specify the
-# licensing information
-#[[licenses.clarify]]
-# The name of the crate the clarification applies to
-#name = "ring"
-# The optional version constraint for the crate
-#version = "*"
-# The SPDX expression for the license requirements of the crate
-#expression = "MIT AND ISC AND OpenSSL"
-# One or more files in the crate's source used as the "source of truth" for
-# the license expression. If the contents match, the clarification will be used
-# when running the license check, otherwise the clarification will be ignored
-# and the crate will be checked normally, which may produce warnings or errors
-# depending on the rest of your configuration
-#license-files = [
-    # Each entry is a crate relative path, and the (opaque) hash of its contents
-    #{ path = "LICENSE", hash = 0xbd0eed23 }
-#]
+[[licenses.clarify]]
+crate = "byte-array-literals"
+expression = "Apache-2.0 WITH LLVM-exception"
+license-files = [{ path = "../../../LICENSE", hash = 0x001c7e6c }]
+
+# SPDX considers OpenSSL to encompass both the OpenSSL and SSLeay licenses
+# https://spdx.org/licenses/OpenSSL.html
+# ISC - Both BoringSSL and ring use this for their new files
+# MIT - "Files in third_party/ have their own licenses, as described therein. The MIT
+# license, for third_party/fiat, which, unlike other third_party directories, is
+# compiled into non-test libraries, is included below."
+# OpenSSL - Obviously
+#expression = "ISC AND MIT AND OpenSSL"
+#license-files = [{ path = "LICENSE", hash = 0xbd0eed23 }]
 
-[licenses.private]
-# If true, ignores workspace crates that aren't published, or are only
-# published to private registries.
-# To see how to mark a crate as unpublished (to the official registry),
-# visit https://doc.rust-lang.org/cargo/reference/manifest.html#the-publish-field.
-ignore = false
-# One or more private registries that you might publish crates to, if a crate
-# is only published to private registries, and ignore is true, the crate will
-# not have its license(s) checked
-registries = [
-    #"https://sekretz.com/registry
-]
-
-# This section is considered when running `cargo deny check bans`.
-# More documentation about the 'bans' section can be found here:
-# https://embarkstudios.github.io/cargo-deny/checks/bans/cfg.html
-[bans]
-# Lint level for when multiple versions of the same crate are detected
-multiple-versions = "warn"
-# Lint level for when a crate version requirement is `*`
-wildcards = "deny"
-# The graph highlighting used when creating dotgraphs for crates
-# with multiple versions
-# * lowest-version - The path to the lowest versioned duplicate is highlighted
-# * simplest-path - The path to the version with the fewest edges is highlighted
-# * all - Both lowest-version and simplest-path are used
-highlight = "all"
-# The default lint level for `default` features for crates that are members of
-# the workspace that is being checked. This can be overridden by allowing/denying
-# `default` on a crate-by-crate basis if desired.
-workspace-default-features = "allow"
-# The default lint level for `default` features for external crates that are not
-# members of the workspace. This can be overridden by allowing/denying `default`
-# on a crate-by-crate basis if desired.
-external-default-features = "allow"
-# List of crates that are allowed. Use with care!
-allow = [
-    #{ name = "ansi_term", version = "=0.11.0" },
-]
-# List of crates to deny
-deny = [
-    # Each entry the name of a crate and a version range. If version is
-    # not specified, all versions will be matched.
-    #{ name = "ansi_term", version = "=0.11.0" },
-    #
-    # Wrapper crates can optionally be specified to allow the crate when it
-    # is a direct dependency of the otherwise banned crate
-    #{ name = "ansi_term", version = "=0.11.0", wrappers = [] },
-    { name = "openssl" },
-]
-
-# List of features to allow/deny
-# Each entry the name of a crate and a version range. If version is
-# not specified, all versions will be matched.
-#[[bans.features]]
-#name = "reqwest"
-# Features to not allow
-#deny = ["json"]
-# Features to allow
-#allow = [
-#    "rustls",
-#    "__rustls",
-#    "__tls",
-#    "hyper-rustls",
-#    "rustls",
-#    "rustls-pemfile",
-#    "rustls-tls-webpki-roots",
-#    "tokio-rustls",
-#    "webpki-roots",
-#]
-# If true, the allowed features must exactly match the enabled feature set. If
-# this is set there is no point setting `deny`
-#exact = true
-
-# Certain crates/versions that will be skipped when doing duplicate detection.
-skip = [
-    #{ name = "ansi_term", version = "=0.11.0" },
-]
-# Similarly to `skip` allows you to skip certain crates during duplicate
-# detection. Unlike skip, it also includes the entire tree of transitive
-# dependencies starting at the specified crate, up to a certain depth, which is
-# by default infinite.
-skip-tree = [
-    #{ name = "ansi_term", version = "=0.11.0", depth = 20 },
-]
-
-# This section is considered when running `cargo deny check sources`.
-# More documentation about the 'sources' section can be found here:
-# https://embarkstudios.github.io/cargo-deny/checks/sources/cfg.html
-[sources]
-# Lint level for what to happen when a crate from a crate registry that is not
-# in the allow list is encountered
-unknown-registry = "deny"
-# Lint level for what to happen when a crate from a git repository that is not
-# in the allow list is encountered
-unknown-git = "deny"
-# List of URLs for allowed crate registries. Defaults to the crates.io index
-# if not specified. If it is specified but empty, no registries are allowed.
-allow-registry = ["https://github.com/rust-lang/crates.io-index"]
-# List of URLs for allowed Git repositories
-allow-git = [
-    "https://github.com/input-output-hk/hermes.git",
-    "https://github.com/input-output-hk/catalyst-pallas.git"
-]
+#[[licenses.clarify]]
+#crate = "webpki"
+#expression = "ISC"
+#license-files = [{ path = "LICENSE", hash = 0x001c7e6c }]
 
-[sources.allow-org]
-# 1 or more github.com organizations to allow git sources for
-#github = [""]
-# 1 or more gitlab.com organizations to allow git sources for
-#gitlab = [""]
-# 1 or more bitbucket.org organizations to allow git sources for
-#bitbucket = [""]
+# Actually "ISC-style"
+#[[licenses.clarify]]
+#crate = "rustls-webpki"
+#expression = "ISC"
+#license-files = [{ path = "LICENSE", hash = 0x001c7e6c }]
diff --git a/catalyst-gateway/event-db/Earthfile b/catalyst-gateway/event-db/Earthfile
index 86841cd516..c3b57a36d8 100644
--- a/catalyst-gateway/event-db/Earthfile
+++ b/catalyst-gateway/event-db/Earthfile
@@ -1,15 +1,16 @@
 # This is a Dockerfile for building a container image for the Catalyst Event Database.
 # The container image is built from scratch and includes the necessary files for running
 # the database and its associated software.
+VERSION 0.8
 
-VERSION 0.7
+IMPORT github.com/input-output-hk/catalyst-ci/earthly/postgresql:v3.00.0 AS postgresql-ci
 
 # cspell: words
 
 # Internal: builder is our Event db builder target. Prepares all necessary artifacts.
 #   CI target : dependency
 builder:
-    DO github.com/input-output-hk/catalyst-ci/earthly/postgresql:v2.11.1+BUILDER
+    DO postgresql-ci+BUILDER
 
     # override setup-db.sql
     COPY setup-db.sql /sql/
@@ -21,8 +22,8 @@ builder:
 build:
     FROM +builder
 
-    DO github.com/input-output-hk/catalyst-ci/earthly/postgresql:v2.11.1+BUILD --image_name=event-db
-    DO github.com/input-output-hk/catalyst-ci/earthly/postgresql:v2.11.1+DOCS --image_name=event-db
+    DO postgresql-ci+BUILD --image_name=event-db
+    DO postgresql-ci+DOCS --image_name=event-db
 
 # test the event db database schema
 #   CI target : true
diff --git a/catalyst-gateway/tests/Earthfile b/catalyst-gateway/tests/Earthfile
index 7cc6478835..2713223062 100644
--- a/catalyst-gateway/tests/Earthfile
+++ b/catalyst-gateway/tests/Earthfile
@@ -1,34 +1,39 @@
-VERSION 0.7
+VERSION 0.8
 
 package-schemathesis:
     FROM python:3.12-alpine3.19
 
     ARG tag="latest"
     ARG max_examples=1000
-    ARG max_response_time=300
+    # TODO: https://github.com/input-output-hk/catalyst-voices/issues/465
+    ARG max_response_time=1000
     ARG wait_for_schema=15
     ARG workers=2
     ARG schema_version=30
     ARG openapi_spec
 
     RUN apk add --no-cache gcc musl-dev
-    RUN python -m pip install schemathesis
+    RUN python -m pip install schemathesis==3.27.1
     RUN mkdir /results
 
     VOLUME /results
-    ENTRYPOINT st run --checks all $openapi_spec --workers=$workers --wait-for-schema=$wait_for_schema \
-                        --max-response-time=$max_response_time --hypothesis-max-examples=$max_examples \
-                            --data-generation-method=all --skip-deprecated-operations \
-                                --force-schema-version=$schema_version --show-trace --force-color  \
-                                  --junit-xml /results/junit-report.xml --cassette-path=/results/cassette.yaml \
-                                # TODO: https://github.com/input-output-hk/catalyst-voices/issues/330
-                                --exclude-checks content_type_conformance \
-                                --exclude-checks response_schema_conformance
+    ENTRYPOINT st run --checks all $openapi_spec \
+                    --workers=$workers \
+                    --wait-for-schema=$wait_for_schema \
+                    --max-response-time=$max_response_time \
+                    --hypothesis-max-examples=$max_examples \
+                    --data-generation-method=all \
+                    --skip-deprecated-operations \
+                    --force-schema-version=$schema_version \
+                    --show-trace \
+                    --force-color  \
+                    --junit-xml=/results/junit-report.xml \
+                    --cassette-path=/results/cassette.yaml
 
     SAVE IMAGE schemathesis:$tag
 
 # test-fuzzer-api - Fuzzy test cat-gateway using openapi specs
-fuzzer-api:
+test-fuzzer-api:
     FROM earthly/dind:alpine-3.19
     RUN apk update && apk add iptables-legacy # workaround for https://github.com/earthly/earthly/issues/3784
     RUN apk add yq zstd
@@ -44,25 +49,18 @@ fuzzer-api:
         --service cat-gateway \
         --allow-privileged
         RUN docker run --net=host --name=st schemathesis:latest || echo fail > fail && \
-                docker logs cat-gateway > ./cat-gateway.log && zstd -9 cat-gateway.log && \
-                    docker cp st:/results/junit-report.xml junit-report.xml && \
-                        docker cp st:/results/cassette.yaml cassette.yaml
+            docker-compose logs cat-gateway > ./cat-gateway.log && zstd -9 cat-gateway.log && \
+            docker cp st:/results/junit-report.xml junit-report.xml && \
+            docker cp st:/results/cassette.yaml cassette.yaml
     END
     WAIT
         SAVE ARTIFACT junit-report.xml AS LOCAL schemathesis.junit-report.xml
         SAVE ARTIFACT cat-gateway.log.zst AS LOCAL cat-gateway.log.zst
         SAVE ARTIFACT cassette.yaml AS LOCAL cassette.yaml
     END
-    IF [ -f fail ]
-        RUN echo -e "\033[0;31mSchemathesis test run failed. Run the test locally to get Catalyst Gateway logs\n" && \
-            echo -e "\033[0;31mFailed tests:" && \
-            yq -PC '.http_interactions.[] | select(.status == "FAILURE")' cassette.yaml && \
-            exit 1
-    END
 
 # test-lint-openapi - OpenAPI linting from an artifact
 # testing whether the OpenAPI generated during build stage follows good practice.
-# enable this linting after this issue will be solved
 test-lint-openapi:
     FROM github.com/input-output-hk/catalyst-ci/earthly/spectral:v2.4.0+spectral-base
     # Copy the doc artifact.
diff --git a/catalyst-gateway/tests/api_tests/Earthfile b/catalyst-gateway/tests/api_tests/Earthfile
index 5c4d985114..d25bfe8c1d 100644
--- a/catalyst-gateway/tests/api_tests/Earthfile
+++ b/catalyst-gateway/tests/api_tests/Earthfile
@@ -1,12 +1,15 @@
-VERSION --global-cache 0.7
+VERSION 0.8
 
+IMPORT github.com/input-output-hk/catalyst-ci/earthly/python:v3.00.0 AS python-ci
+
+# builder : 
 builder:
-    FROM github.com/input-output-hk/catalyst-ci/earthly/python:v2.11.1+python-base
+    FROM python-ci+python-base
 
     # prepare tests
     COPY --dir ./api_tests .
     COPY ./snapshot_tool-56364174.json .
-    DO github.com/input-output-hk/catalyst-ci/earthly/python:v2.11.1+BUILDER
+    DO python-ci+BUILDER
 
 test:
     FROM +builder
diff --git a/catalyst-gateway/tests/api_tests/api_tests/__init__.py b/catalyst-gateway/tests/api_tests/api_tests/__init__.py
index 14d2437930..e15ed46f89 100644
--- a/catalyst-gateway/tests/api_tests/api_tests/__init__.py
+++ b/catalyst-gateway/tests/api_tests/api_tests/__init__.py
@@ -22,6 +22,7 @@ def cat_gateway_endpoint_url(endpoint: str):
 
 def check_is_live():
     resp = requests.get(cat_gateway_endpoint_url("api/health/live"))
+    print(f"resp: {resp}, code: {resp.status_code}")
     assert resp.status_code == 204
     logger.info("cat-gateway service is LIVE.")
 
diff --git a/catalyst-gateway/tests/api_tests/docker-compose.yml b/catalyst-gateway/tests/api_tests/docker-compose.yml
index eef91b418e..d029da3f67 100644
--- a/catalyst-gateway/tests/api_tests/docker-compose.yml
+++ b/catalyst-gateway/tests/api_tests/docker-compose.yml
@@ -34,7 +34,6 @@ services:
       - DATA_REFRESH_TICK=5
       - CHECK_CONFIG_TICK=5
       - MACHINE_ID="UID"
-    hostname: gateway
     ports:
       - 3030:3030
     depends_on:
diff --git a/catalyst-gateway/tests/schemathesis-docker-compose.yml b/catalyst-gateway/tests/schemathesis-docker-compose.yml
index fe30738a89..01acbeab55 100644
--- a/catalyst-gateway/tests/schemathesis-docker-compose.yml
+++ b/catalyst-gateway/tests/schemathesis-docker-compose.yml
@@ -34,8 +34,8 @@ services:
       - DATA_REFRESH_TICK=5
       - CHECK_CONFIG_TICK=5
       - MACHINE_ID="UID"
-    container_name: cat-gateway
-    network_mode: "host"
+    ports:
+      - 3030:3030
     depends_on:
       event-db:
         condition: service_healthy
diff --git a/catalyst_voices/Earthfile b/catalyst_voices/Earthfile
index ccf99e46a7..46b4ed0dc1 100644
--- a/catalyst_voices/Earthfile
+++ b/catalyst_voices/Earthfile
@@ -1,4 +1,6 @@
-VERSION --try --global-cache --arg-scope-and-set 0.7
+VERSION 0.8
+
+IMPORT ../catalyst-gateway AS catalyst-gateway
 
 # If running this target with a local ssh agent active, set the environment
 # variable EARTHLY_SSH_AUTH_SOCK='' to make the `+deps` target work. Earthly
@@ -8,6 +10,7 @@ VERSION --try --global-cache --arg-scope-and-set 0.7
 deps:
     FROM debian:bookworm-slim
     ARG TARGETARCH
+    ARG FLUTTER_VERSION=3.19.5
     RUN apt-get update
     RUN apt-get install -y git curl unzip bzip2 bash jq gpg lcov
     COPY --dir test_driver/scripts .
@@ -17,10 +20,8 @@ deps:
 
     WORKDIR /frontend
 
-    RUN git clone https://github.com/flutter/flutter.git /usr/local/flutter
+    RUN git clone --depth 1 --branch $FLUTTER_VERSION https://github.com/flutter/flutter.git /usr/local/flutter
     ENV PATH="/usr/local/flutter/bin:/usr/local/flutter/bin/cache/dart-sdk/bin:$HOME/.pub-cache/bin:${PATH}"
-    RUN flutter channel stable
-    RUN flutter upgrade
     RUN flutter --version
     RUN flutter doctor -v
     RUN flutter config --enable-web
@@ -43,7 +44,7 @@ code-generator:
 
     FROM +src
     WORKDIR /frontend/catalyst_voices/packages/catalyst_voices_services
-    COPY ../catalyst-gateway+build/doc/cat-gateway-api.json openapi/cat-gateway-api.json
+    COPY catalyst-gateway+build/doc/cat-gateway-api.json openapi/cat-gateway-api.json
     RUN flutter pub get
     RUN dart run build_runner build --delete-conflicting-outputs
 
diff --git a/catalyst_voices/lib/pages/coming_soon/description.dart b/catalyst_voices/lib/pages/coming_soon/description.dart
index 90214c098b..82fe7ae460 100644
--- a/catalyst_voices/lib/pages/coming_soon/description.dart
+++ b/catalyst_voices/lib/pages/coming_soon/description.dart
@@ -13,7 +13,7 @@ class ComingSoonDescription extends StatelessWidget {
       height: 66,
       child: DefaultTextStyle(
         style: GoogleFonts.notoSans(
-          textStyle: const TextStyle(color: VoicesColors.blueText),
+          textStyle: const TextStyle(color: VoicesColors.lightTextOnPrimary),
           fontSize: 16,
           fontWeight: FontWeight.w400,
         ),
diff --git a/catalyst_voices/lib/pages/coming_soon/logo.dart b/catalyst_voices/lib/pages/coming_soon/logo.dart
index 0547e27a5a..d3854da508 100644
--- a/catalyst_voices/lib/pages/coming_soon/logo.dart
+++ b/catalyst_voices/lib/pages/coming_soon/logo.dart
@@ -20,7 +20,7 @@ class ComingSoonLogo extends StatelessWidget {
           child: Text(
             l10n.comingSoonSubtitle,
             style: GoogleFonts.notoSans(
-              textStyle: const TextStyle(color: VoicesColors.blue),
+              textStyle: const TextStyle(color: VoicesColors.lightPrimary),
               fontSize: 19,
               fontWeight: FontWeight.w500,
             ),
diff --git a/catalyst_voices/lib/pages/coming_soon/title.dart b/catalyst_voices/lib/pages/coming_soon/title.dart
index e2230b295c..4f3ad1a614 100644
--- a/catalyst_voices/lib/pages/coming_soon/title.dart
+++ b/catalyst_voices/lib/pages/coming_soon/title.dart
@@ -18,7 +18,7 @@ class ComingSoonTitle extends StatelessWidget {
         children: [
           DefaultTextStyle(
             style: GoogleFonts.poppins(
-              textStyle: const TextStyle(color: VoicesColors.blue),
+              textStyle: const TextStyle(color: VoicesColors.lightPrimary),
               fontSize: 53,
               height: 1.15,
               fontWeight: FontWeight.w700,
@@ -35,7 +35,7 @@ class ComingSoonTitle extends StatelessWidget {
           ),
           DefaultTextStyle(
             style: GoogleFonts.poppins(
-              textStyle: const TextStyle(color: VoicesColors.blue),
+              textStyle: const TextStyle(color: VoicesColors.lightPrimary),
               fontSize: 53,
               height: 1.15,
               fontWeight: FontWeight.w700,
diff --git a/catalyst_voices/lib/pages/home/home_page.dart b/catalyst_voices/lib/pages/home/home_page.dart
index ca1ca53729..ebaec830fc 100644
--- a/catalyst_voices/lib/pages/home/home_page.dart
+++ b/catalyst_voices/lib/pages/home/home_page.dart
@@ -18,7 +18,7 @@ final class HomePage extends StatelessWidget {
             Text(
               context.l10n.homeScreenText,
               style: const TextStyle(
-                color: VoicesColors.purpleGradientStart,
+                color: VoicesColors.lightPrimary,
                 fontFamily: VoicesFonts.sFPro,
                 fontSize: 32,
               ),
diff --git a/catalyst_voices/packages/catalyst_voices_assets/assets/colors/colors.xml b/catalyst_voices/packages/catalyst_voices_assets/assets/colors/colors.xml
index 0a9f7a30dd..b5a26c57ce 100644
--- a/catalyst_voices/packages/catalyst_voices_assets/assets/colors/colors.xml
+++ b/catalyst_voices/packages/catalyst_voices_assets/assets/colors/colors.xml
@@ -1,14 +1,97 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <color name="white">#FFFFFF</color>
-    <color name="dark_background ">#000000</color>
-    <color name="purple">#512DA8</color>
-    <color name="purple_gradient_start">#673AB7</color>
-    <color name="purple_gradient_stop">#512DA8</color>
-    <color name="dark_card">#222126</color>
-    <color name="green">#7CAE7A</color>
-    <color name="red">#B02E0C</color>
-    <color name="today">#565656</color>
-    <color name="blue">#1235C7</color>
-    <color name="blue_text">#506288</color>
+    <color name="light_text_primary">#212A3D</color>
+    <color name="light_text_on_primary">#506288</color>
+    <color name="light_text_on_primary_container">#FFFFFF</color>
+    <color name="light_text_disabled">#61212A3D</color>
+    <color name="light_primary">#123CD3</color>
+    <color name="light_on_primary">#FFFFFF</color>
+    <color name="light_primary_container">#A1B4F7</color>
+    <color name="light_on_primary_container">#081B5E</color>
+    <color name="light_secondary">#C014EB</color>
+    <color name="light_on_secondary">#FFFFFF</color>
+    <color name="light_secondary_container">#E6A1F7</color>
+    <color name="light_on_secondary_container">#4D085E</color>
+    <color name="light_outline">#D9DEE8</color>
+    <color name="light_outline_variant">#61BFC8D9</color>
+    <color name="light_error">#CC0000</color>
+    <color name="light_on_error">#FFFFFF</color>
+    <color name="light_error_container">#FFD1D1</color>
+    <color name="light_on_error_container">#700000</color>
+    <color name="light_success">#218230</color>
+    <color name="light_on_success">#FFFFFF</color>
+    <color name="light_success_container">#CEF3D4</color>
+    <color name="light_on_success_container">#13491B</color>
+    <color name="light_warning">#E76309</color>
+    <color name="light_on_warning">#FFFFFF</color>
+    <color name="light_warning_container">#FDE1CE</color>
+    <color name="light_on_warning_container">#582603</color>
+    <color name="light_on_surface_neutral_08">#14212A3D</color>
+    <color name="light_on_surface_neutral_012">#1F212A3D</color>
+    <color name="light_on_surface_neutral_016">#29212A3D</color>
+    <color name="light_on_surface_primary_container">#A1B4F7</color>
+    <color name="light_on_surface_primary_08">#14123CD3</color>
+    <color name="light_on_surface_primary_012">#1F123CD3</color>
+    <color name="light_on_surface_primary_016">#29123CD3</color>
+    <color name="light_on_surface_secondary_08">#14C014EB</color>
+    <color name="light_on_surface_secondary_012">#1FC014EB</color>
+    <color name="light_on_surface_secondary_016">#29C014EB</color>
+    <color name="light_on_surface_error_08">#14CC0000</color>
+    <color name="light_on_surface_error_012">#1FCC0000</color>
+    <color name="light_on_surface_error_016">#29CC0000</color>
+    <color name="light_icons_foreground">#212A3D</color>
+    <color name="light_icons_background">#FFFFFF</color>
+    <color name="light_icons_disabled">#61212A3D</color>
+    <color name="light_icons_primary">#123CD3</color>
+    <color name="light_icons_secondary">#C014EB</color>
+    <color name="light_icons_success">#218230</color>
+    <color name="light_icons_warning">#E76309</color>
+    <color name="light_icons_error">#CC0000</color>
+    <color name="dark_text_primary">#FFFFFF</color>
+    <color name="dark_text_on_primary">#E6E9F0</color>
+    <color name="dark_text_on_primary_container">#0C288D</color>
+    <color name="dark_text_disabled">#61D9DEE8</color>
+    <color name="dark_primary">#728EF3</color>
+    <color name="dark_on_primary">#0C288D</color>
+    <color name="dark_primary_container">#1035BC</color>
+    <color name="dark_on_primary_container">#E8ECFD</color>
+    <color name="dark_secondary">#DF8AF5</color>
+    <color name="dark_on_secondary">#26042F</color>
+    <color name="dark_secondary_container">#9910BC</color>
+    <color name="dark_on_secondary_container">#9910BC</color>
+    <color name="dark_outline">#7F90B3</color>
+    <color name="dark_outline_variant">#364463</color>
+    <color name="dark_error">#FF9999</color>
+    <color name="dark_on_error">#380000</color>
+    <color name="dark_error_container">#AD0000</color>
+    <color name="dark_on_error_container">#FFD1D1</color>
+    <color name="dark_success">#BAEDC2</color>
+    <color name="dark_on_success">#08210C</color>
+    <color name="dark_success_container">#1D722A</color>
+    <color name="dark_on_success_container">#CEF3D4</color>
+    <color name="dark_warning">#FBC9A7</color>
+    <color name="dark_on_warning">#2C1302</color>
+    <color name="dark_warning_container">#B64E07</color>
+    <color name="dark_on_warning_container">#FDE1CE</color>
+    <color name="dark_on_surface_neutral_08">#1FBFC8D9</color>
+    <color name="dark_on_surface_neutral_012">#1FBFC8D9</color>
+    <color name="dark_on_surface_neutral_016">#29212A3D</color>
+    <color name="dark_on_surface_primary_container">#0C288D</color>
+    <color name="dark_on_surface_primary_08">#1F123CD3</color>
+    <color name="dark_on_surface_primary_012">#1F123CD3</color>
+    <color name="dark_on_surface_primary_016">#29123CD3</color>
+    <color name="dark_on_surface_secondary_08">#1FD972F3</color>
+    <color name="dark_on_surface_secondary_012">#1FC014EB</color>
+    <color name="dark_on_surface_secondary_016">#29C014EB</color>
+    <color name="dark_on_surface_error_08">#1FFFC2C2</color>
+    <color name="dark_on_surface_error_012">#1FCC0000</color>
+    <color name="dark_on_surface_error_016">#29CC0000</color>
+    <color name="dark_icons_foreground">#F2F4F8</color>
+    <color name="dark_icons_background">#212A3D</color>
+    <color name="dark_icons_disabled">#61BFC8D9</color>
+    <color name="dark_icons_primary">#728EF3</color>
+    <color name="dark_icons_secondary">#DF8AF5</color>
+    <color name="dark_icons_success">#85E093</color>
+    <color name="dark_icons_warning">#FAB484</color>
+    <color name="dark_icons_error">#FF9999</color>
 </resources>
diff --git a/catalyst_voices/packages/catalyst_voices_assets/example/lib/src/main.dart b/catalyst_voices/packages/catalyst_voices_assets/example/lib/src/main.dart
index d2f8dccbbf..537effa13d 100644
--- a/catalyst_voices/packages/catalyst_voices_assets/example/lib/src/main.dart
+++ b/catalyst_voices/packages/catalyst_voices_assets/example/lib/src/main.dart
@@ -17,7 +17,7 @@ final class Example extends StatelessWidget {
               const Text(
                 'Catalyst Assets',
                 style: TextStyle(
-                  color: VoicesColors.purpleGradientStart,
+                  color: VoicesColors.lightPrimary,
                   fontFamily: VoicesFonts.sFPro,
                   fontSize: 32,
                 ),
diff --git a/catalyst_voices/packages/catalyst_voices_assets/lib/generated/colors.gen.dart b/catalyst_voices/packages/catalyst_voices_assets/lib/generated/colors.gen.dart
index 6259051f28..8e121dd46c 100644
--- a/catalyst_voices/packages/catalyst_voices_assets/lib/generated/colors.gen.dart
+++ b/catalyst_voices/packages/catalyst_voices_assets/lib/generated/colors.gen.dart
@@ -13,36 +13,285 @@ import 'package:flutter/material.dart';
 class VoicesColors {
   VoicesColors._();
 
-  /// Color: #1235C7
-  static const Color blue = Color(0xFF1235C7);
+  /// Color: #FF9999
+  static const Color darkError = Color(0xFFFF9999);
 
-  /// Color: #506288
-  static const Color blueText = Color(0xFF506288);
+  /// Color: #AD0000
+  static const Color darkErrorContainer = Color(0xFFAD0000);
+
+  /// Color: #212A3D
+  static const Color darkIconsBackground = Color(0xFF212A3D);
+
+  /// Color: #61BFC8D9
+  static const Color darkIconsDisabled = Color(0x61BFC8D9);
+
+  /// Color: #FF9999
+  static const Color darkIconsError = Color(0xFFFF9999);
+
+  /// Color: #F2F4F8
+  static const Color darkIconsForeground = Color(0xFFF2F4F8);
+
+  /// Color: #728EF3
+  static const Color darkIconsPrimary = Color(0xFF728EF3);
+
+  /// Color: #DF8AF5
+  static const Color darkIconsSecondary = Color(0xFFDF8AF5);
+
+  /// Color: #85E093
+  static const Color darkIconsSuccess = Color(0xFF85E093);
+
+  /// Color: #FAB484
+  static const Color darkIconsWarning = Color(0xFFFAB484);
+
+  /// Color: #380000
+  static const Color darkOnError = Color(0xFF380000);
+
+  /// Color: #FFD1D1
+  static const Color darkOnErrorContainer = Color(0xFFFFD1D1);
+
+  /// Color: #0C288D
+  static const Color darkOnPrimary = Color(0xFF0C288D);
+
+  /// Color: #E8ECFD
+  static const Color darkOnPrimaryContainer = Color(0xFFE8ECFD);
+
+  /// Color: #26042F
+  static const Color darkOnSecondary = Color(0xFF26042F);
+
+  /// Color: #9910BC
+  static const Color darkOnSecondaryContainer = Color(0xFF9910BC);
+
+  /// Color: #08210C
+  static const Color darkOnSuccess = Color(0xFF08210C);
+
+  /// Color: #CEF3D4
+  static const Color darkOnSuccessContainer = Color(0xFFCEF3D4);
+
+  /// Color: #1FCC0000
+  static const Color darkOnSurfaceError012 = Color(0x1FCC0000);
+
+  /// Color: #29CC0000
+  static const Color darkOnSurfaceError016 = Color(0x29CC0000);
+
+  /// Color: #1FFFC2C2
+  static const Color darkOnSurfaceError08 = Color(0x1FFFC2C2);
+
+  /// Color: #1FBFC8D9
+  static const Color darkOnSurfaceNeutral012 = Color(0x1FBFC8D9);
+
+  /// Color: #29212A3D
+  static const Color darkOnSurfaceNeutral016 = Color(0x29212A3D);
+
+  /// Color: #1FBFC8D9
+  static const Color darkOnSurfaceNeutral08 = Color(0x1FBFC8D9);
+
+  /// Color: #1F123CD3
+  static const Color darkOnSurfacePrimary012 = Color(0x1F123CD3);
+
+  /// Color: #29123CD3
+  static const Color darkOnSurfacePrimary016 = Color(0x29123CD3);
+
+  /// Color: #1F123CD3
+  static const Color darkOnSurfacePrimary08 = Color(0x1F123CD3);
+
+  /// Color: #0C288D
+  static const Color darkOnSurfacePrimaryContainer = Color(0xFF0C288D);
+
+  /// Color: #1FC014EB
+  static const Color darkOnSurfaceSecondary012 = Color(0x1FC014EB);
+
+  /// Color: #29C014EB
+  static const Color darkOnSurfaceSecondary016 = Color(0x29C014EB);
+
+  /// Color: #1FD972F3
+  static const Color darkOnSurfaceSecondary08 = Color(0x1FD972F3);
+
+  /// Color: #2C1302
+  static const Color darkOnWarning = Color(0xFF2C1302);
+
+  /// Color: #FDE1CE
+  static const Color darkOnWarningContainer = Color(0xFFFDE1CE);
+
+  /// Color: #7F90B3
+  static const Color darkOutline = Color(0xFF7F90B3);
+
+  /// Color: #364463
+  static const Color darkOutlineVariant = Color(0xFF364463);
+
+  /// Color: #728EF3
+  static const Color darkPrimary = Color(0xFF728EF3);
+
+  /// Color: #1035BC
+  static const Color darkPrimaryContainer = Color(0xFF1035BC);
+
+  /// Color: #DF8AF5
+  static const Color darkSecondary = Color(0xFFDF8AF5);
+
+  /// Color: #9910BC
+  static const Color darkSecondaryContainer = Color(0xFF9910BC);
+
+  /// Color: #BAEDC2
+  static const Color darkSuccess = Color(0xFFBAEDC2);
+
+  /// Color: #1D722A
+  static const Color darkSuccessContainer = Color(0xFF1D722A);
+
+  /// Color: #61D9DEE8
+  static const Color darkTextDisabled = Color(0x61D9DEE8);
+
+  /// Color: #E6E9F0
+  static const Color darkTextOnPrimary = Color(0xFFE6E9F0);
+
+  /// Color: #0C288D
+  static const Color darkTextOnPrimaryContainer = Color(0xFF0C288D);
+
+  /// Color: #FFFFFF
+  static const Color darkTextPrimary = Color(0xFFFFFFFF);
+
+  /// Color: #FBC9A7
+  static const Color darkWarning = Color(0xFFFBC9A7);
 
-  /// Color: #000000
-  static const Color darkBackground = Color(0xFF000000);
+  /// Color: #B64E07
+  static const Color darkWarningContainer = Color(0xFFB64E07);
 
-  /// Color: #222126
-  static const Color darkCard = Color(0xFF222126);
+  /// Color: #CC0000
+  static const Color lightError = Color(0xFFCC0000);
 
-  /// Color: #7CAE7A
-  static const Color green = Color(0xFF7CAE7A);
+  /// Color: #FFD1D1
+  static const Color lightErrorContainer = Color(0xFFFFD1D1);
 
-  /// Color: #512DA8
-  static const Color purple = Color(0xFF512DA8);
+  /// Color: #FFFFFF
+  static const Color lightIconsBackground = Color(0xFFFFFFFF);
+
+  /// Color: #61212A3D
+  static const Color lightIconsDisabled = Color(0x61212A3D);
+
+  /// Color: #CC0000
+  static const Color lightIconsError = Color(0xFFCC0000);
+
+  /// Color: #212A3D
+  static const Color lightIconsForeground = Color(0xFF212A3D);
+
+  /// Color: #123CD3
+  static const Color lightIconsPrimary = Color(0xFF123CD3);
+
+  /// Color: #C014EB
+  static const Color lightIconsSecondary = Color(0xFFC014EB);
+
+  /// Color: #218230
+  static const Color lightIconsSuccess = Color(0xFF218230);
+
+  /// Color: #E76309
+  static const Color lightIconsWarning = Color(0xFFE76309);
+
+  /// Color: #FFFFFF
+  static const Color lightOnError = Color(0xFFFFFFFF);
+
+  /// Color: #700000
+  static const Color lightOnErrorContainer = Color(0xFF700000);
+
+  /// Color: #FFFFFF
+  static const Color lightOnPrimary = Color(0xFFFFFFFF);
+
+  /// Color: #081B5E
+  static const Color lightOnPrimaryContainer = Color(0xFF081B5E);
+
+  /// Color: #FFFFFF
+  static const Color lightOnSecondary = Color(0xFFFFFFFF);
+
+  /// Color: #4D085E
+  static const Color lightOnSecondaryContainer = Color(0xFF4D085E);
+
+  /// Color: #FFFFFF
+  static const Color lightOnSuccess = Color(0xFFFFFFFF);
+
+  /// Color: #13491B
+  static const Color lightOnSuccessContainer = Color(0xFF13491B);
+
+  /// Color: #1FCC0000
+  static const Color lightOnSurfaceError012 = Color(0x1FCC0000);
+
+  /// Color: #29CC0000
+  static const Color lightOnSurfaceError016 = Color(0x29CC0000);
+
+  /// Color: #14CC0000
+  static const Color lightOnSurfaceError08 = Color(0x14CC0000);
 
-  /// Color: #673AB7
-  static const Color purpleGradientStart = Color(0xFF673AB7);
+  /// Color: #1F212A3D
+  static const Color lightOnSurfaceNeutral012 = Color(0x1F212A3D);
 
-  /// Color: #512DA8
-  static const Color purpleGradientStop = Color(0xFF512DA8);
+  /// Color: #29212A3D
+  static const Color lightOnSurfaceNeutral016 = Color(0x29212A3D);
 
-  /// Color: #B02E0C
-  static const Color red = Color(0xFFB02E0C);
+  /// Color: #14212A3D
+  static const Color lightOnSurfaceNeutral08 = Color(0x14212A3D);
 
-  /// Color: #565656
-  static const Color today = Color(0xFF565656);
+  /// Color: #1F123CD3
+  static const Color lightOnSurfacePrimary012 = Color(0x1F123CD3);
+
+  /// Color: #29123CD3
+  static const Color lightOnSurfacePrimary016 = Color(0x29123CD3);
+
+  /// Color: #14123CD3
+  static const Color lightOnSurfacePrimary08 = Color(0x14123CD3);
+
+  /// Color: #A1B4F7
+  static const Color lightOnSurfacePrimaryContainer = Color(0xFFA1B4F7);
+
+  /// Color: #1FC014EB
+  static const Color lightOnSurfaceSecondary012 = Color(0x1FC014EB);
+
+  /// Color: #29C014EB
+  static const Color lightOnSurfaceSecondary016 = Color(0x29C014EB);
+
+  /// Color: #14C014EB
+  static const Color lightOnSurfaceSecondary08 = Color(0x14C014EB);
 
   /// Color: #FFFFFF
-  static const Color white = Color(0xFFFFFFFF);
+  static const Color lightOnWarning = Color(0xFFFFFFFF);
+
+  /// Color: #582603
+  static const Color lightOnWarningContainer = Color(0xFF582603);
+
+  /// Color: #D9DEE8
+  static const Color lightOutline = Color(0xFFD9DEE8);
+
+  /// Color: #61BFC8D9
+  static const Color lightOutlineVariant = Color(0x61BFC8D9);
+
+  /// Color: #123CD3
+  static const Color lightPrimary = Color(0xFF123CD3);
+
+  /// Color: #A1B4F7
+  static const Color lightPrimaryContainer = Color(0xFFA1B4F7);
+
+  /// Color: #C014EB
+  static const Color lightSecondary = Color(0xFFC014EB);
+
+  /// Color: #E6A1F7
+  static const Color lightSecondaryContainer = Color(0xFFE6A1F7);
+
+  /// Color: #218230
+  static const Color lightSuccess = Color(0xFF218230);
+
+  /// Color: #CEF3D4
+  static const Color lightSuccessContainer = Color(0xFFCEF3D4);
+
+  /// Color: #61212A3D
+  static const Color lightTextDisabled = Color(0x61212A3D);
+
+  /// Color: #506288
+  static const Color lightTextOnPrimary = Color(0xFF506288);
+
+  /// Color: #FFFFFF
+  static const Color lightTextOnPrimaryContainer = Color(0xFFFFFFFF);
+
+  /// Color: #212A3D
+  static const Color lightTextPrimary = Color(0xFF212A3D);
+
+  /// Color: #E76309
+  static const Color lightWarning = Color(0xFFE76309);
+
+  /// Color: #FDE1CE
+  static const Color lightWarningContainer = Color(0xFFFDE1CE);
 }
diff --git a/catalyst_voices/packages/catalyst_voices_brands/lib/src/theme_builder/theme_builder.dart b/catalyst_voices/packages/catalyst_voices_brands/lib/src/theme_builder/theme_builder.dart
index 40c4ae71cb..440921a96a 100644
--- a/catalyst_voices/packages/catalyst_voices_brands/lib/src/theme_builder/theme_builder.dart
+++ b/catalyst_voices/packages/catalyst_voices_brands/lib/src/theme_builder/theme_builder.dart
@@ -4,23 +4,34 @@ import 'package:catalyst_voices_brands/src/themes/fallback.dart';
 import 'package:flutter/material.dart';
 
 /// A utility class to build themes dynamically based on brand keys.
-/// 
+///
 /// [buildTheme] can be used to obtain the corresponding theme data for the
 /// [BrandKey] passed to the method.
-/// 
-/// For each brand there is a specific key defined in the [BrandKey] enum 
+///
+/// [buildDarkTheme] operates in the same way but picks the dark version of the
+/// theme for a specific brand.
+///
+/// For each brand there is a specific key defined in the [BrandKey] enum
 /// and a corresponding [ThemeData] in the `themes` folder.
+/// For each brand a light and a dark [ThemeData] should be defined.
 ///
-/// [buildTheme] defaults to the [catalyst] theme. 
+/// [buildTheme] and [buildDarkTheme] default to the [catalyst] theme.
 class ThemeBuilder {
+  static final Map<BrandKey, ThemeData> lightThemes = {
+    BrandKey.catalyst: catalyst,
+    BrandKey.fallback: fallback,
+  };
+
+  static final Map<BrandKey, ThemeData> darkThemes = {
+    BrandKey.catalyst: darkCatalyst,
+    BrandKey.fallback: darkFallback,
+  };
+
   static ThemeData buildTheme(BrandKey? brandKey) {
-    switch (brandKey) {
-      case BrandKey.catalyst:
-        return catalyst;
-      case BrandKey.fallback:
-        return fallback;
-      case null:
-        return catalyst;
-    }
+    return lightThemes[brandKey ?? BrandKey.catalyst]!;
+  }
+
+  static ThemeData buildDarkTheme(BrandKey? brandKey) {
+    return darkThemes[brandKey ?? BrandKey.catalyst]!;
   }
 }
diff --git a/catalyst_voices/packages/catalyst_voices_brands/lib/src/themes/catalyst.dart b/catalyst_voices/packages/catalyst_voices_brands/lib/src/themes/catalyst.dart
index 8e3c5698d9..885c4efcf6 100644
--- a/catalyst_voices/packages/catalyst_voices_brands/lib/src/themes/catalyst.dart
+++ b/catalyst_voices/packages/catalyst_voices_brands/lib/src/themes/catalyst.dart
@@ -1,10 +1,232 @@
 import 'package:catalyst_voices_assets/catalyst_voices_assets.dart';
+import 'package:catalyst_voices_assets/generated/colors.gen.dart';
+import 'package:catalyst_voices_brands/src/themes/voices_color_scheme.dart';
 import 'package:flutter/material.dart';
+import 'package:google_fonts/google_fonts.dart';
+
+ThemeData _buildThemeData(
+  ColorScheme colorScheme,
+  VoicesColorScheme voicesColorScheme,
+) {
+  return ThemeData(
+    textTheme: TextTheme(
+      displayLarge: GoogleFonts.notoSans(
+        color: voicesColorScheme.textPrimary,
+        fontSize: 57,
+        letterSpacing: -1.14,
+        fontWeight: FontWeight.w700,
+        height: 1.12,
+      ),
+      displayMedium: GoogleFonts.poppins(
+        color: voicesColorScheme.textPrimary,
+        fontSize: 45,
+        fontWeight: FontWeight.w700,
+        height: 1.15,
+      ),
+      displaySmall: GoogleFonts.poppins(
+        color: voicesColorScheme.textPrimary,
+        fontSize: 36,
+        fontWeight: FontWeight.w700,
+        height: 1.22,
+      ),
+      headlineLarge: GoogleFonts.poppins(
+        color: voicesColorScheme.textPrimary,
+        fontSize: 32,
+        fontWeight: FontWeight.w700,
+        height: 1.25,
+      ),
+      headlineMedium: GoogleFonts.poppins(
+        color: voicesColorScheme.textPrimary,
+        fontSize: 28,
+        fontWeight: FontWeight.w700,
+        height: 1.28,
+      ),
+      headlineSmall: GoogleFonts.poppins(
+        color: voicesColorScheme.textPrimary,
+        fontSize: 24,
+        fontWeight: FontWeight.w700,
+        height: 1.33,
+      ),
+      titleLarge: GoogleFonts.poppins(
+        color: voicesColorScheme.textPrimary,
+        fontSize: 22,
+        fontWeight: FontWeight.w700,
+        height: 1.27,
+        letterSpacing: 0.66,
+      ),
+      titleMedium: GoogleFonts.poppins(
+        color: voicesColorScheme.textPrimary,
+        fontSize: 16,
+        fontWeight: FontWeight.w700,
+        height: 1.5,
+        letterSpacing: 0.48,
+      ),
+      titleSmall: GoogleFonts.poppins(
+        color: voicesColorScheme.textPrimary,
+        fontSize: 14,
+        fontWeight: FontWeight.w700,
+        height: 1.42,
+        letterSpacing: 0.42,
+      ),
+      bodyLarge: GoogleFonts.notoSans(
+        color: voicesColorScheme.textPrimary,
+        fontSize: 16,
+        fontWeight: FontWeight.w500,
+        height: 1.5,
+        letterSpacing: 0.08,
+      ),
+      bodyMedium: GoogleFonts.notoSans(
+        color: voicesColorScheme.textPrimary,
+        fontSize: 14,
+        fontWeight: FontWeight.w500,
+        height: 1.42,
+        letterSpacing: 0.04,
+      ),
+      bodySmall: GoogleFonts.notoSans(
+        color: voicesColorScheme.textPrimary,
+        fontSize: 12,
+        fontWeight: FontWeight.w500,
+        height: 1.33,
+        letterSpacing: 0.05,
+      ),
+      labelLarge: GoogleFonts.notoSans(
+        color: voicesColorScheme.textPrimary,
+        fontSize: 14,
+        fontWeight: FontWeight.w500,
+        height: 1.42,
+        letterSpacing: 0.10,
+      ),
+      labelMedium: GoogleFonts.notoSans(
+        color: voicesColorScheme.textPrimary,
+        fontSize: 12,
+        fontWeight: FontWeight.w500,
+        height: 1,
+      ),
+      labelSmall: GoogleFonts.notoSans(
+        color: voicesColorScheme.textPrimary,
+        fontSize: 11,
+        fontWeight: FontWeight.w500,
+        height: 1.45,
+        letterSpacing: 0.50,
+      ),
+    ),
+    colorScheme: colorScheme,
+    extensions: <ThemeExtension<dynamic>>[
+      voicesColorScheme,
+    ],
+  );
+}
+
+const ColorScheme lightColorScheme = ColorScheme.light(
+  primary: VoicesColors.lightPrimary,
+  primaryContainer: VoicesColors.lightPrimaryContainer,
+  onPrimaryContainer: VoicesColors.lightOnPrimaryContainer,
+  secondary: VoicesColors.lightSecondary,
+  onSecondary: VoicesColors.lightOnSecondary,
+  secondaryContainer: VoicesColors.lightSecondaryContainer,
+  onSecondaryContainer: VoicesColors.lightOnSecondaryContainer,
+  error: VoicesColors.lightError,
+  errorContainer: VoicesColors.lightErrorContainer,
+  onErrorContainer: VoicesColors.lightOnErrorContainer,
+  outline: VoicesColors.lightOutline,
+  outlineVariant: VoicesColors.lightOutlineVariant,
+);
+
+const VoicesColorScheme lightVoicesColorScheme = VoicesColorScheme(
+  textPrimary: VoicesColors.lightTextPrimary,
+  textOnPrimary: VoicesColors.lightTextOnPrimary,
+  textOnPrimaryContainer: VoicesColors.lightTextOnPrimaryContainer,
+  textDisabled: VoicesColors.lightTextDisabled,
+  success: VoicesColors.lightSuccess,
+  onSuccess: VoicesColors.lightOnSuccess,
+  successContainer: VoicesColors.lightSuccessContainer,
+  onSuccessContainer: VoicesColors.lightOnSuccessContainer,
+  warning: VoicesColors.lightWarning,
+  onWarning: VoicesColors.lightOnWarning,
+  warningContainer: VoicesColors.lightWarningContainer,
+  onWarningContainer: VoicesColors.lightOnWarningContainer,
+  onSurfaceNeutral08: VoicesColors.lightOnSurfaceNeutral08,
+  onSurfaceNeutral012: VoicesColors.lightOnSurfaceNeutral012,
+  onSurfaceNeutral016: VoicesColors.lightOnSurfaceNeutral016,
+  onSurfacePrimaryContainer: VoicesColors.lightOnSurfacePrimaryContainer,
+  onSurfacePrimary08: VoicesColors.lightOnSurfacePrimary08,
+  onSurfacePrimary012: VoicesColors.lightOnSurfacePrimary012,
+  onSurfacePrimary016: VoicesColors.lightOnSurfacePrimary016,
+  onSurfaceSecondary08: VoicesColors.lightOnSurfaceSecondary08,
+  onSurfaceSecondary012: VoicesColors.lightOnSurfaceSecondary012,
+  onSurfaceSecondary016: VoicesColors.lightOnSurfaceSecondary016,
+  onSurfaceError08: VoicesColors.lightOnSurfaceError08,
+  onSurfaceError012: VoicesColors.lightOnSurfaceError012,
+  onSurfaceError016: VoicesColors.lightOnSurfaceError016,
+  iconsForeground: VoicesColors.lightIconsForeground,
+  iconsBackground: VoicesColors.lightIconsBackground,
+  iconsDisabled: VoicesColors.lightIconsDisabled,
+  iconsPrimary: VoicesColors.lightIconsPrimary,
+  iconsSecondary: VoicesColors.lightIconsSecondary,
+  iconsSuccess: VoicesColors.lightIconsSuccess,
+  iconsWarning: VoicesColors.lightIconsWarning,
+  iconsError: VoicesColors.lightIconsError,
+);
+
+const ColorScheme darkColorScheme = ColorScheme.dark(
+  primary: VoicesColors.darkPrimary,
+  primaryContainer: VoicesColors.darkPrimaryContainer,
+  onPrimaryContainer: VoicesColors.darkOnPrimaryContainer,
+  secondary: VoicesColors.darkSecondary,
+  onSecondary: VoicesColors.darkOnSecondary,
+  secondaryContainer: VoicesColors.darkSecondaryContainer,
+  onSecondaryContainer: VoicesColors.darkOnSecondaryContainer,
+  error: VoicesColors.darkError,
+  errorContainer: VoicesColors.darkErrorContainer,
+  onErrorContainer: VoicesColors.darkOnErrorContainer,
+  outline: VoicesColors.darkOutline,
+  outlineVariant: VoicesColors.darkOutlineVariant,
+);
+
+const VoicesColorScheme darkVoicesColorScheme = VoicesColorScheme(
+  textPrimary: VoicesColors.darkTextPrimary,
+  textOnPrimary: VoicesColors.darkTextOnPrimary,
+  textOnPrimaryContainer: VoicesColors.darkTextOnPrimaryContainer,
+  textDisabled: VoicesColors.darkTextDisabled,
+  success: VoicesColors.darkSuccess,
+  onSuccess: VoicesColors.darkOnSuccess,
+  successContainer: VoicesColors.darkSuccessContainer,
+  onSuccessContainer: VoicesColors.darkOnSuccessContainer,
+  warning: VoicesColors.darkWarning,
+  onWarning: VoicesColors.darkOnWarning,
+  warningContainer: VoicesColors.darkWarningContainer,
+  onWarningContainer: VoicesColors.darkOnWarningContainer,
+  onSurfaceNeutral08: VoicesColors.darkOnSurfaceNeutral08,
+  onSurfaceNeutral012: VoicesColors.darkOnSurfaceNeutral012,
+  onSurfaceNeutral016: VoicesColors.darkOnSurfaceNeutral016,
+  onSurfacePrimaryContainer: VoicesColors.darkOnSurfacePrimaryContainer,
+  onSurfacePrimary08: VoicesColors.darkOnSurfacePrimary08,
+  onSurfacePrimary012: VoicesColors.darkOnSurfacePrimary012,
+  onSurfacePrimary016: VoicesColors.darkOnSurfacePrimary016,
+  onSurfaceSecondary08: VoicesColors.darkOnSurfaceSecondary08,
+  onSurfaceSecondary012: VoicesColors.darkOnSurfaceSecondary012,
+  onSurfaceSecondary016: VoicesColors.darkOnSurfaceSecondary016,
+  onSurfaceError08: VoicesColors.darkOnSurfaceError08,
+  onSurfaceError012: VoicesColors.darkOnSurfaceError012,
+  onSurfaceError016: VoicesColors.darkOnSurfaceError016,
+  iconsForeground: VoicesColors.darkIconsForeground,
+  iconsBackground: VoicesColors.darkIconsBackground,
+  iconsDisabled: VoicesColors.darkIconsDisabled,
+  iconsPrimary: VoicesColors.darkIconsPrimary,
+  iconsSecondary: VoicesColors.darkIconsSecondary,
+  iconsSuccess: VoicesColors.darkIconsSuccess,
+  iconsWarning: VoicesColors.darkIconsWarning,
+  iconsError: VoicesColors.darkIconsError,
+);
 
 /// [ThemeData] for the `catalyst` brand.
-final ThemeData catalyst = ThemeData(
-  colorScheme: ColorScheme.fromSeed(
-    seedColor: VoicesColors.blue,
-    primary: VoicesColors.blue,
-  ),
+final ThemeData catalyst = _buildThemeData(
+  lightColorScheme,
+  lightVoicesColorScheme,
+);
+
+/// Dark [ThemeData] for the `catalyst` brand.
+final ThemeData darkCatalyst = _buildThemeData(
+  darkColorScheme,
+  darkVoicesColorScheme,
 );
diff --git a/catalyst_voices/packages/catalyst_voices_brands/lib/src/themes/fallback.dart b/catalyst_voices/packages/catalyst_voices_brands/lib/src/themes/fallback.dart
index fc8dca40e4..7fa296225d 100644
--- a/catalyst_voices/packages/catalyst_voices_brands/lib/src/themes/fallback.dart
+++ b/catalyst_voices/packages/catalyst_voices_brands/lib/src/themes/fallback.dart
@@ -1,4 +1,7 @@
 import 'package:flutter/material.dart';
 
 /// [ThemeData] for the `fallback` brand.
-final ThemeData fallback = ThemeData(useMaterial3: true);
+final ThemeData fallback = ThemeData.light();
+
+/// Dark [ThemeData] for the `fallback` brand.
+final ThemeData darkFallback = ThemeData.dark();
diff --git a/catalyst_voices/packages/catalyst_voices_brands/lib/src/themes/voices_color_scheme.dart b/catalyst_voices/packages/catalyst_voices_brands/lib/src/themes/voices_color_scheme.dart
new file mode 100644
index 0000000000..2708ae520f
--- /dev/null
+++ b/catalyst_voices/packages/catalyst_voices_brands/lib/src/themes/voices_color_scheme.dart
@@ -0,0 +1,219 @@
+import 'package:flutter/material.dart';
+
+@immutable
+class VoicesColorScheme extends ThemeExtension<VoicesColorScheme> {
+  final Color? textPrimary;
+  final Color? textOnPrimary;
+  final Color? textOnPrimaryContainer;
+  final Color? textDisabled;
+  final Color? success;
+  final Color? onSuccess;
+  final Color? successContainer;
+  final Color? onSuccessContainer;
+  final Color? warning;
+  final Color? onWarning;
+  final Color? warningContainer;
+  final Color? onWarningContainer;
+  final Color? onSurfaceNeutral08;
+  final Color? onSurfaceNeutral012;
+  final Color? onSurfaceNeutral016;
+  final Color? onSurfacePrimaryContainer;
+  final Color? onSurfacePrimary08;
+  final Color? onSurfacePrimary012;
+  final Color? onSurfacePrimary016;
+  final Color? onSurfaceSecondary08;
+  final Color? onSurfaceSecondary012;
+  final Color? onSurfaceSecondary016;
+  final Color? onSurfaceError08;
+  final Color? onSurfaceError012;
+  final Color? onSurfaceError016;
+  final Color? iconsForeground;
+  final Color? iconsBackground;
+  final Color? iconsDisabled;
+  final Color? iconsPrimary;
+  final Color? iconsSecondary;
+  final Color? iconsSuccess;
+  final Color? iconsWarning;
+  final Color? iconsError;
+
+  const VoicesColorScheme({
+    required this.textPrimary,
+    required this.textOnPrimary,
+    required this.textOnPrimaryContainer,
+    required this.textDisabled,
+    required this.success,
+    required this.onSuccess,
+    required this.successContainer,
+    required this.onSuccessContainer,
+    required this.warning,
+    required this.onWarning,
+    required this.warningContainer,
+    required this.onWarningContainer,
+    required this.onSurfaceNeutral08,
+    required this.onSurfaceNeutral012,
+    required this.onSurfaceNeutral016,
+    required this.onSurfacePrimaryContainer,
+    required this.onSurfacePrimary08,
+    required this.onSurfacePrimary012,
+    required this.onSurfacePrimary016,
+    required this.onSurfaceSecondary08,
+    required this.onSurfaceSecondary012,
+    required this.onSurfaceSecondary016,
+    required this.onSurfaceError08,
+    required this.onSurfaceError012,
+    required this.onSurfaceError016,
+    required this.iconsForeground,
+    required this.iconsBackground,
+    required this.iconsDisabled,
+    required this.iconsPrimary,
+    required this.iconsSecondary,
+    required this.iconsSuccess,
+    required this.iconsWarning,
+    required this.iconsError,
+  });
+
+  @override
+  ThemeExtension<VoicesColorScheme> copyWith({
+    Color? textPrimary,
+    Color? textOnPrimary,
+    Color? textOnPrimaryContainer,
+    Color? textDisabled,
+    Color? success,
+    Color? onSuccess,
+    Color? successContainer,
+    Color? onSuccessContainer,
+    Color? warning,
+    Color? onWarning,
+    Color? warningContainer,
+    Color? onWarningContainer,
+    Color? onSurfaceNeutral08,
+    Color? onSurfaceNeutral012,
+    Color? onSurfaceNeutral016,
+    Color? onSurfacePrimaryContainer,
+    Color? onSurfacePrimary08,
+    Color? onSurfacePrimary012,
+    Color? onSurfacePrimary016,
+    Color? onSurfaceSecondary08,
+    Color? onSurfaceSecondary012,
+    Color? onSurfaceSecondary016,
+    Color? onSurfaceError08,
+    Color? onSurfaceError012,
+    Color? onSurfaceError016,
+    Color? iconsForeground,
+    Color? iconsBackground,
+    Color? iconsDisabled,
+    Color? iconsPrimary,
+    Color? iconsSecondary,
+    Color? iconsSuccess,
+    Color? iconsWarning,
+    Color? iconsError,
+  }) {
+    return VoicesColorScheme(
+      textPrimary: textPrimary ?? this.textPrimary,
+      textOnPrimary: textOnPrimary ?? this.textOnPrimary,
+      textOnPrimaryContainer:
+          textOnPrimaryContainer ?? this.textOnPrimaryContainer,
+      textDisabled: textDisabled ?? this.textDisabled,
+      success: success ?? this.success,
+      onSuccess: onSuccess ?? this.onSuccess,
+      successContainer: successContainer ?? this.successContainer,
+      onSuccessContainer: onSuccessContainer ?? this.onSuccessContainer,
+      warning: warning ?? this.warning,
+      onWarning: onWarning ?? this.onWarning,
+      warningContainer: warningContainer ?? this.warningContainer,
+      onWarningContainer: onWarningContainer ?? this.onWarningContainer,
+      onSurfaceNeutral08: onSurfaceNeutral08 ?? this.onSurfaceError08,
+      onSurfaceNeutral012: onSurfaceNeutral012 ?? this.onSurfaceError012,
+      onSurfaceNeutral016: onSurfaceNeutral016 ?? this.onSurfaceError016,
+      onSurfacePrimaryContainer:
+          onSurfacePrimaryContainer ?? this.onSurfacePrimaryContainer,
+      onSurfacePrimary08: onSurfacePrimary08 ?? this.onSurfacePrimary08,
+      onSurfacePrimary012: onSurfacePrimary012 ?? this.onSurfacePrimary012,
+      onSurfacePrimary016: onSurfacePrimary016 ?? this.onSurfacePrimary016,
+      onSurfaceSecondary08: onSurfaceSecondary08 ?? this.onSurfaceSecondary08,
+      onSurfaceSecondary012:
+          onSurfaceSecondary012 ?? this.onSurfaceSecondary012,
+      onSurfaceSecondary016:
+          onSurfaceSecondary016 ?? this.onSurfaceSecondary016,
+      onSurfaceError08: onSurfaceError08 ?? this.onSurfaceError08,
+      onSurfaceError012: onSurfaceError012 ?? this.onSurfaceError012,
+      onSurfaceError016: onSurfaceError016 ?? this.onSurfaceError016,
+      iconsForeground: iconsForeground ?? this.iconsForeground,
+      iconsBackground: iconsBackground ?? this.iconsBackground,
+      iconsDisabled: iconsDisabled ?? this.iconsDisabled,
+      iconsPrimary: iconsPrimary ?? this.iconsPrimary,
+      iconsSecondary: iconsSecondary ?? this.iconsSecondary,
+      iconsSuccess: iconsSuccess ?? this.iconsSuccess,
+      iconsWarning: iconsWarning ?? this.iconsWarning,
+      iconsError: iconsError ?? this.iconsError,
+    );
+  }
+
+  @override
+  VoicesColorScheme lerp(
+    ThemeExtension<VoicesColorScheme>? other,
+    double t,
+  ) {
+    if (other is! VoicesColorScheme) {
+      return this;
+    }
+    return VoicesColorScheme(
+      textPrimary: Color.lerp(textPrimary, other.textPrimary, t),
+      textOnPrimary: Color.lerp(textOnPrimary, other.textOnPrimary, t),
+      textOnPrimaryContainer:
+          Color.lerp(textOnPrimaryContainer, other.textOnPrimaryContainer, t),
+      textDisabled: Color.lerp(textDisabled, other.textDisabled, t),
+      success: Color.lerp(success, other.success, t),
+      onSuccess: Color.lerp(onSuccess, other.onSuccess, t),
+      successContainer: Color.lerp(successContainer, other.successContainer, t),
+      onSuccessContainer:
+          Color.lerp(onSuccessContainer, other.onSuccessContainer, t),
+      warning: Color.lerp(warning, other.warning, t),
+      onWarning: Color.lerp(onWarning, other.onWarning, t),
+      warningContainer: Color.lerp(warningContainer, other.warningContainer, t),
+      onWarningContainer:
+          Color.lerp(onWarningContainer, other.onWarningContainer, t),
+      onSurfaceNeutral08:
+          Color.lerp(onSurfaceNeutral08, other.onSurfaceNeutral08, t),
+      onSurfaceNeutral012:
+          Color.lerp(onSurfaceNeutral012, other.onSurfaceNeutral012, t),
+      onSurfaceNeutral016:
+          Color.lerp(onSurfaceNeutral016, other.onSurfaceNeutral016, t),
+      onSurfacePrimaryContainer: Color.lerp(
+        onSurfacePrimaryContainer,
+        other.onSurfacePrimaryContainer,
+        t,
+      ),
+      onSurfacePrimary08:
+          Color.lerp(onSurfacePrimary08, other.onSurfacePrimary08, t),
+      onSurfacePrimary012:
+          Color.lerp(onSurfacePrimary012, other.onSurfacePrimary012, t),
+      onSurfacePrimary016:
+          Color.lerp(onSurfacePrimary016, other.onSurfacePrimary016, t),
+      onSurfaceSecondary08:
+          Color.lerp(onSurfaceSecondary08, other.onSurfaceSecondary08, t),
+      onSurfaceSecondary012:
+          Color.lerp(onSurfaceSecondary012, other.onSurfaceSecondary012, t),
+      onSurfaceSecondary016:
+          Color.lerp(onSurfaceSecondary016, other.onSurfaceSecondary016, t),
+      onSurfaceError08: Color.lerp(onSurfaceError08, other.onSurfaceError08, t),
+      onSurfaceError012:
+          Color.lerp(onSurfaceError012, other.onSurfaceError012, t),
+      onSurfaceError016:
+          Color.lerp(onSurfaceError016, other.onSurfaceError016, t),
+      iconsForeground: Color.lerp(iconsForeground, other.iconsForeground, t),
+      iconsBackground: Color.lerp(iconsBackground, other.iconsBackground, t),
+      iconsDisabled: Color.lerp(iconsDisabled, other.iconsDisabled, t),
+      iconsPrimary: Color.lerp(iconsPrimary, other.iconsPrimary, t),
+      iconsSecondary: Color.lerp(iconsSecondary, other.iconsSecondary, t),
+      iconsSuccess: Color.lerp(iconsSuccess, other.iconsSuccess, t),
+      iconsWarning: Color.lerp(iconsWarning, other.iconsWarning, t),
+      iconsError: Color.lerp(iconsError, other.iconsError, t),
+    );
+  }
+}
+
+extension VoicesColorSchemeExtension on ThemeData {
+  VoicesColorScheme get colors => extension<VoicesColorScheme>()!;
+  Color get linksPrimary => primaryColor;
+}
diff --git a/catalyst_voices/packages/catalyst_voices_brands/pubspec.yaml b/catalyst_voices/packages/catalyst_voices_brands/pubspec.yaml
index acd46ab52c..c77b7a4a4a 100644
--- a/catalyst_voices/packages/catalyst_voices_brands/pubspec.yaml
+++ b/catalyst_voices/packages/catalyst_voices_brands/pubspec.yaml
@@ -12,6 +12,7 @@ dependencies:
     path: ../catalyst_voices_assets
   flutter:
     sdk: flutter
+  google_fonts: ^6.2.1
 
 dev_dependencies:
   catalyst_analysis:
diff --git a/catalyst_voices/packages/catalyst_voices_brands/test/src/catalyst_voices_brands_test.dart b/catalyst_voices/packages/catalyst_voices_brands/test/src/catalyst_voices_brands_test.dart
index ea24aace4c..eea47f7db2 100644
--- a/catalyst_voices/packages/catalyst_voices_brands/test/src/catalyst_voices_brands_test.dart
+++ b/catalyst_voices/packages/catalyst_voices_brands/test/src/catalyst_voices_brands_test.dart
@@ -10,51 +10,51 @@ void main() {
   const fallbackKey = Key('F');
 
   Widget buildApp() => BlocProvider(
-    create: (context) => BrandBloc(),
-    child: BlocBuilder<BrandBloc, BrandState>(
-      builder: (context, state) {
-        return MaterialApp(
-          home: Builder(
-            builder: (context) => Scaffold(
-              body: Row(
-                children: [
-                  MaterialButton(
-                    key: catalystKey,
-                    color: Theme.of(context).primaryColor,
-                    onPressed: () {
-                      context.read<BrandBloc>().add(
-                        const BrandChangedEvent(BrandKey.catalyst),
-                      );
-                    },
-                    child: const Text('Catalyst'),
+        create: (context) => BrandBloc(),
+        child: BlocBuilder<BrandBloc, BrandState>(
+          builder: (context, state) {
+            return MaterialApp(
+              home: Builder(
+                builder: (context) => Scaffold(
+                  body: Row(
+                    children: [
+                      MaterialButton(
+                        key: catalystKey,
+                        color: Theme.of(context).primaryColor,
+                        onPressed: () {
+                          context.read<BrandBloc>().add(
+                                const BrandChangedEvent(BrandKey.catalyst),
+                              );
+                        },
+                        child: const Text('Catalyst'),
+                      ),
+                      MaterialButton(
+                        key: fallbackKey,
+                        color: Theme.of(context).primaryColor,
+                        child: const Text('Fallback'),
+                        onPressed: () {
+                          context.read<BrandBloc>().add(
+                                const BrandChangedEvent(BrandKey.fallback),
+                              );
+                        },
+                      ),
+                    ],
                   ),
-                  MaterialButton(
-                    key: fallbackKey,
-                    color: Theme.of(context).primaryColor,
-                    child: const Text('Fallback'),
-                    onPressed: () {
-                      context.read<BrandBloc>().add(
-                        const BrandChangedEvent(BrandKey.fallback),
-                      );
-                    },
-                  ),
-                ],
+                ),
               ),
-            ),
-          ),
-          theme: ThemeBuilder.buildTheme(state.brandKey),
-        );
-      },
-    ),
-  );
+              theme: ThemeBuilder.buildTheme(state.brandKey),
+              darkTheme: ThemeBuilder.buildTheme(state.brandKey),
+            );
+          },
+        ),
+      );
 
   group('Test brands', () {
-
     // Colors used in the Brand themes as primary. They are used for
     // the color of the widgets we are testing and they are the colors
     // we will check against to ensure correct rendering.
     final fallbackColor = ThemeData(useMaterial3: true).primaryColor;
-    const catalystColor = VoicesColors.blue;
+    const catalystColor = VoicesColors.lightPrimary;
 
     testWidgets('Default Catalyst theme is applied', (tester) async {
       await tester.pumpWidget(
@@ -85,10 +85,10 @@ void main() {
 
       expect(catalystButton, findsOneWidget);
       expect(fallbackButton, findsOneWidget);
-      
+
       await tester.tap(fallbackButton);
       // We need to wait for the animation to complete
-      await tester.pumpAndSettle();      
+      await tester.pumpAndSettle();
       expect(
         tester.widget<MaterialButton>(catalystButton).color,
         fallbackColor,
@@ -109,14 +109,14 @@ void main() {
 
       expect(catalystButton, findsOneWidget);
       expect(fallbackButton, findsOneWidget);
-      
+
       // We first switch do FallbackBrand, we wait for the animation completion
       // and then we switch back to the CatalystBrand to check the correct
       // color is applied.
       await tester.tap(fallbackButton);
       await tester.pumpAndSettle();
       await tester.tap(catalystButton);
-      await tester.pumpAndSettle(); 
+      await tester.pumpAndSettle();
       expect(
         tester.widget<MaterialButton>(catalystButton).color,
         catalystColor,
@@ -126,7 +126,5 @@ void main() {
         catalystColor,
       );
     });
-
   });
-
 }
diff --git a/catalyst_voices/packages/catalyst_voices_services/lib/generated/catalyst_gateway/cat_gateway_api.enums.swagger.dart b/catalyst_voices/packages/catalyst_voices_services/lib/generated/catalyst_gateway/cat_gateway_api.enums.swagger.dart
index b963d59336..ec8b97b8b5 100644
--- a/catalyst_voices/packages/catalyst_voices_services/lib/generated/catalyst_gateway/cat_gateway_api.enums.swagger.dart
+++ b/catalyst_voices/packages/catalyst_voices_services/lib/generated/catalyst_gateway/cat_gateway_api.enums.swagger.dart
@@ -1,22 +1,6 @@
 import 'package:json_annotation/json_annotation.dart';
 import 'package:collection/collection.dart';
 
-enum Animals {
-  @JsonValue(null)
-  swaggerGeneratedUnknown(null),
-
-  @JsonValue('Dogs')
-  dogs('Dogs'),
-  @JsonValue('Cats')
-  cats('Cats'),
-  @JsonValue('Rabbits')
-  rabbits('Rabbits');
-
-  final String? value;
-
-  const Animals(this.value);
-}
-
 enum Network {
   @JsonValue(null)
   swaggerGeneratedUnknown(null),
diff --git a/catalyst_voices/packages/catalyst_voices_services/lib/generated/catalyst_gateway/cat_gateway_api.models.swagger.dart b/catalyst_voices/packages/catalyst_voices_services/lib/generated/catalyst_gateway/cat_gateway_api.models.swagger.dart
index 199cba5729..49881b58a2 100644
--- a/catalyst_voices/packages/catalyst_voices_services/lib/generated/catalyst_gateway/cat_gateway_api.models.swagger.dart
+++ b/catalyst_voices/packages/catalyst_voices_services/lib/generated/catalyst_gateway/cat_gateway_api.models.swagger.dart
@@ -625,31 +625,31 @@ extension $RejectedFragmentExtension on RejectedFragment {
 }
 
 @JsonSerializable(explicitToJson: true)
-class ServerErrorPayload {
-  const ServerErrorPayload({
+class ServerError {
+  const ServerError({
     required this.id,
-    this.msg,
+    required this.msg,
     this.issue,
   });
 
-  factory ServerErrorPayload.fromJson(Map<String, dynamic> json) =>
-      _$ServerErrorPayloadFromJson(json);
+  factory ServerError.fromJson(Map<String, dynamic> json) =>
+      _$ServerErrorFromJson(json);
 
-  static const toJsonFactory = _$ServerErrorPayloadToJson;
-  Map<String, dynamic> toJson() => _$ServerErrorPayloadToJson(this);
+  static const toJsonFactory = _$ServerErrorToJson;
+  Map<String, dynamic> toJson() => _$ServerErrorToJson(this);
 
   @JsonKey(name: 'id')
   final String id;
   @JsonKey(name: 'msg')
-  final String? msg;
+  final String msg;
   @JsonKey(name: 'issue')
   final String? issue;
-  static const fromJsonFactory = _$ServerErrorPayloadFromJson;
+  static const fromJsonFactory = _$ServerErrorFromJson;
 
   @override
   bool operator ==(Object other) {
     return identical(this, other) ||
-        (other is ServerErrorPayload &&
+        (other is ServerError &&
             (identical(other.id, id) ||
                 const DeepCollectionEquality().equals(other.id, id)) &&
             (identical(other.msg, msg) ||
@@ -669,15 +669,15 @@ class ServerErrorPayload {
       runtimeType.hashCode;
 }
 
-extension $ServerErrorPayloadExtension on ServerErrorPayload {
-  ServerErrorPayload copyWith({String? id, String? msg, String? issue}) {
-    return ServerErrorPayload(
+extension $ServerErrorExtension on ServerError {
+  ServerError copyWith({String? id, String? msg, String? issue}) {
+    return ServerError(
         id: id ?? this.id, msg: msg ?? this.msg, issue: issue ?? this.issue);
   }
 
-  ServerErrorPayload copyWithWrapped(
-      {Wrapped<String>? id, Wrapped<String?>? msg, Wrapped<String?>? issue}) {
-    return ServerErrorPayload(
+  ServerError copyWithWrapped(
+      {Wrapped<String>? id, Wrapped<String>? msg, Wrapped<String?>? issue}) {
+    return ServerError(
         id: (id != null ? id.value : this.id),
         msg: (msg != null ? msg.value : this.msg),
         issue: (issue != null ? issue.value : this.issue));
@@ -1053,6 +1053,49 @@ extension $SyncStateExtension on SyncState {
   }
 }
 
+@JsonSerializable(explicitToJson: true)
+class ValidationError {
+  const ValidationError({
+    required this.message,
+  });
+
+  factory ValidationError.fromJson(Map<String, dynamic> json) =>
+      _$ValidationErrorFromJson(json);
+
+  static const toJsonFactory = _$ValidationErrorToJson;
+  Map<String, dynamic> toJson() => _$ValidationErrorToJson(this);
+
+  @JsonKey(name: 'message')
+  final String message;
+  static const fromJsonFactory = _$ValidationErrorFromJson;
+
+  @override
+  bool operator ==(Object other) {
+    return identical(this, other) ||
+        (other is ValidationError &&
+            (identical(other.message, message) ||
+                const DeepCollectionEquality().equals(other.message, message)));
+  }
+
+  @override
+  String toString() => jsonEncode(this);
+
+  @override
+  int get hashCode =>
+      const DeepCollectionEquality().hash(message) ^ runtimeType.hashCode;
+}
+
+extension $ValidationErrorExtension on ValidationError {
+  ValidationError copyWith({String? message}) {
+    return ValidationError(message: message ?? this.message);
+  }
+
+  ValidationError copyWithWrapped({Wrapped<String>? message}) {
+    return ValidationError(
+        message: (message != null ? message.value : this.message));
+  }
+}
+
 @JsonSerializable(explicitToJson: true)
 class VotePlan {
   const VotePlan({
@@ -1425,68 +1468,6 @@ extension $VotingInfoDirectVoterExtension on VotingInfoDirectVoter {
   }
 }
 
-String? animalsNullableToJson(enums.Animals? animals) {
-  return animals?.value;
-}
-
-String? animalsToJson(enums.Animals animals) {
-  return animals.value;
-}
-
-enums.Animals animalsFromJson(
-  Object? animals, [
-  enums.Animals? defaultValue,
-]) {
-  return enums.Animals.values.firstWhereOrNull((e) => e.value == animals) ??
-      defaultValue ??
-      enums.Animals.swaggerGeneratedUnknown;
-}
-
-enums.Animals? animalsNullableFromJson(
-  Object? animals, [
-  enums.Animals? defaultValue,
-]) {
-  if (animals == null) {
-    return null;
-  }
-  return enums.Animals.values.firstWhereOrNull((e) => e.value == animals) ??
-      defaultValue;
-}
-
-String animalsExplodedListToJson(List<enums.Animals>? animals) {
-  return animals?.map((e) => e.value!).join(',') ?? '';
-}
-
-List<String> animalsListToJson(List<enums.Animals>? animals) {
-  if (animals == null) {
-    return [];
-  }
-
-  return animals.map((e) => e.value!).toList();
-}
-
-List<enums.Animals> animalsListFromJson(
-  List? animals, [
-  List<enums.Animals>? defaultValue,
-]) {
-  if (animals == null) {
-    return defaultValue ?? [];
-  }
-
-  return animals.map((e) => animalsFromJson(e.toString())).toList();
-}
-
-List<enums.Animals>? animalsNullableListFromJson(
-  List? animals, [
-  List<enums.Animals>? defaultValue,
-]) {
-  if (animals == null) {
-    return defaultValue;
-  }
-
-  return animals.map((e) => animalsFromJson(e.toString())).toList();
-}
-
 String? networkNullableToJson(enums.Network? network) {
   return network?.value;
 }
diff --git a/catalyst_voices/packages/catalyst_voices_services/lib/generated/catalyst_gateway/cat_gateway_api.models.swagger.g.dart b/catalyst_voices/packages/catalyst_voices_services/lib/generated/catalyst_gateway/cat_gateway_api.models.swagger.g.dart
index 824cf7a055..d953798421 100644
--- a/catalyst_voices/packages/catalyst_voices_services/lib/generated/catalyst_gateway/cat_gateway_api.models.swagger.g.dart
+++ b/catalyst_voices/packages/catalyst_voices_services/lib/generated/catalyst_gateway/cat_gateway_api.models.swagger.g.dart
@@ -152,14 +152,13 @@ Map<String, dynamic> _$RejectedFragmentToJson(RejectedFragment instance) =>
       'reason': reasonRejectedToJson(instance.reason),
     };
 
-ServerErrorPayload _$ServerErrorPayloadFromJson(Map<String, dynamic> json) =>
-    ServerErrorPayload(
+ServerError _$ServerErrorFromJson(Map<String, dynamic> json) => ServerError(
       id: json['id'] as String,
-      msg: json['msg'] as String?,
+      msg: json['msg'] as String,
       issue: json['issue'] as String?,
     );
 
-Map<String, dynamic> _$ServerErrorPayloadToJson(ServerErrorPayload instance) =>
+Map<String, dynamic> _$ServerErrorToJson(ServerError instance) =>
     <String, dynamic>{
       'id': instance.id,
       'msg': instance.msg,
@@ -246,6 +245,16 @@ Map<String, dynamic> _$SyncStateToJson(SyncState instance) => <String, dynamic>{
       'last_updated': instance.lastUpdated.toIso8601String(),
     };
 
+ValidationError _$ValidationErrorFromJson(Map<String, dynamic> json) =>
+    ValidationError(
+      message: json['message'] as String,
+    );
+
+Map<String, dynamic> _$ValidationErrorToJson(ValidationError instance) =>
+    <String, dynamic>{
+      'message': instance.message,
+    };
+
 VotePlan _$VotePlanFromJson(Map<String, dynamic> json) => VotePlan(
       votingToken: json['voting_token'] as String,
     );
diff --git a/catalyst_voices/packages/catalyst_voices_services/lib/generated/catalyst_gateway/cat_gateway_api.swagger.chopper.dart b/catalyst_voices/packages/catalyst_voices_services/lib/generated/catalyst_gateway/cat_gateway_api.swagger.chopper.dart
index 7af0561ff4..d839455d5e 100644
--- a/catalyst_voices/packages/catalyst_voices_services/lib/generated/catalyst_gateway/cat_gateway_api.swagger.chopper.dart
+++ b/catalyst_voices/packages/catalyst_voices_services/lib/generated/catalyst_gateway/cat_gateway_api.swagger.chopper.dart
@@ -17,37 +17,6 @@ final class _$CatGatewayApi extends CatGatewayApi {
   @override
   final Type definitionType = CatGatewayApi;
 
-  @override
-  Future<Response<dynamic>> _apiTestTestIdTestActionGet({
-    required int? id,
-    required String? action,
-    List<Object?>? pet,
-  }) {
-    final Uri $url = Uri.parse('/api/test/test/${id}/test/${action}');
-    final Map<String, dynamic> $params = <String, dynamic>{'pet': pet};
-    final Request $request = Request(
-      'GET',
-      $url,
-      client.baseUrl,
-      parameters: $params,
-    );
-    return client.send<dynamic, dynamic>($request);
-  }
-
-  @override
-  Future<Response<dynamic>> _apiTestTestIdTestActionPost({
-    required int? id,
-    required String? action,
-  }) {
-    final Uri $url = Uri.parse('/api/test/test/${id}/test/${action}');
-    final Request $request = Request(
-      'POST',
-      $url,
-      client.baseUrl,
-    );
-    return client.send<dynamic, dynamic>($request);
-  }
-
   @override
   Future<Response<dynamic>> _apiHealthStartedGet() {
     final Uri $url = Uri.parse('/api/health/started');
diff --git a/catalyst_voices/packages/catalyst_voices_services/lib/generated/catalyst_gateway/cat_gateway_api.swagger.dart b/catalyst_voices/packages/catalyst_voices_services/lib/generated/catalyst_gateway/cat_gateway_api.swagger.dart
index a20a2d48fe..698049b133 100644
--- a/catalyst_voices/packages/catalyst_voices_services/lib/generated/catalyst_gateway/cat_gateway_api.swagger.dart
+++ b/catalyst_voices/packages/catalyst_voices_services/lib/generated/catalyst_gateway/cat_gateway_api.swagger.dart
@@ -48,56 +48,6 @@ abstract class CatGatewayApi extends ChopperService {
     return _$CatGatewayApi(newClient);
   }
 
-  ///Test Get API
-  ///@param id The ID of the test.  This comment ends up in the documentation.  * 5 will print an info log * 10 will print a warn log * 15 will print a error log * 20 will panic which should generate a 500
-  ///@param action The action just needs to be any valid UUID.  # Make sure its a UUID
-  ///@param pet List your favorite pets, in order of preference
-  @deprecated
-  Future<chopper.Response> apiTestTestIdTestActionGet({
-    required int? id,
-    required String? action,
-    List<enums.Animals>? pet,
-  }) {
-    return _apiTestTestIdTestActionGet(
-        id: id, action: action, pet: animalsListToJson(pet));
-  }
-
-  ///Test Get API
-  ///@param id The ID of the test.  This comment ends up in the documentation.  * 5 will print an info log * 10 will print a warn log * 15 will print a error log * 20 will panic which should generate a 500
-  ///@param action The action just needs to be any valid UUID.  # Make sure its a UUID
-  ///@param pet List your favorite pets, in order of preference
-  @deprecated
-  @Get(path: '/api/test/test/{id}/test/{action}')
-  Future<chopper.Response> _apiTestTestIdTestActionGet({
-    @Path('id') required int? id,
-    @Path('action') required String? action,
-    @Query('pet') List<Object?>? pet,
-  });
-
-  ///Test Post API
-  ///@param id The ID of the test.  * 5 will print an info log * 10 will print a warn log * 15 will print a error log * 20 will panic which should generate a 500
-  ///@param action The action just needs to be any valid UUID.  # Make sure its a UUID
-  @deprecated
-  Future<chopper.Response> apiTestTestIdTestActionPost({
-    required int? id,
-    required String? action,
-  }) {
-    return _apiTestTestIdTestActionPost(id: id, action: action);
-  }
-
-  ///Test Post API
-  ///@param id The ID of the test.  * 5 will print an info log * 10 will print a warn log * 15 will print a error log * 20 will panic which should generate a 500
-  ///@param action The action just needs to be any valid UUID.  # Make sure its a UUID
-  @deprecated
-  @Post(
-    path: '/api/test/test/{id}/test/{action}',
-    optionalBody: true,
-  )
-  Future<chopper.Response> _apiTestTestIdTestActionPost({
-    @Path('id') required int? id,
-    @Path('action') required String? action,
-  });
-
   ///Service Started
   Future<chopper.Response> apiHealthStartedGet() {
     return _apiHealthStartedGet();
diff --git a/catalyst_voices/pubspec.yaml b/catalyst_voices/pubspec.yaml
index 15c94c316a..810aaed179 100644
--- a/catalyst_voices/pubspec.yaml
+++ b/catalyst_voices/pubspec.yaml
@@ -10,6 +10,8 @@ environment:
 dependencies:
   animated_text_kit: ^4.2.2
   animations: ^2.0.11
+  catalyst_cardano_serialization:
+    path: ../catalyst_voices_packages/catalyst_cardano_serialization
   catalyst_voices_assets:
     path: ./packages/catalyst_voices_assets
   catalyst_voices_blocs:
diff --git a/catalyst_voices/test_driver/Earthfile b/catalyst_voices/test_driver/Earthfile
index b68ca8fc4a..a35db067f1 100644
--- a/catalyst_voices/test_driver/Earthfile
+++ b/catalyst_voices/test_driver/Earthfile
@@ -1,7 +1,9 @@
-VERSION --try --global-cache --arg-scope-and-set 0.7
+VERSION 0.8
+
+IMPORT ../ AS catalyst-voices
 
 integration-test-web:
-    FROM ../+build
+    FROM catalyst-voices+build
     ARG TARGETARCH
     ARG browser
     LET driver_port = 4444
diff --git a/catalyst_voices_packages/catalyst_cardano_serialization/CHANGELOG.md b/catalyst_voices_packages/catalyst_cardano_serialization/CHANGELOG.md
new file mode 100644
index 0000000000..a533b45bb9
--- /dev/null
+++ b/catalyst_voices_packages/catalyst_cardano_serialization/CHANGELOG.md
@@ -0,0 +1,3 @@
+# 0.1.0
+
+* Initial release.
diff --git a/catalyst_voices_packages/catalyst_cardano_serialization/README.md b/catalyst_voices_packages/catalyst_cardano_serialization/README.md
new file mode 100644
index 0000000000..191e021c7c
--- /dev/null
+++ b/catalyst_voices_packages/catalyst_cardano_serialization/README.md
@@ -0,0 +1 @@
+# catalyst_cardano_serialization
diff --git a/catalyst_voices_packages/catalyst_cardano_serialization/analysis_options.yaml b/catalyst_voices_packages/catalyst_cardano_serialization/analysis_options.yaml
new file mode 100644
index 0000000000..886855b51a
--- /dev/null
+++ b/catalyst_voices_packages/catalyst_cardano_serialization/analysis_options.yaml
@@ -0,0 +1,4 @@
+include: package:catalyst_analysis/analysis_options.1.0.0.yaml
+
+analyzer:
+  exclude: [build/**, lib/*.g.dart, lib/generated/**]
diff --git a/catalyst_voices_packages/catalyst_cardano_serialization/lib/catalyst_cardano_serialization.dart b/catalyst_voices_packages/catalyst_cardano_serialization/lib/catalyst_cardano_serialization.dart
new file mode 100644
index 0000000000..bf48afc09d
--- /dev/null
+++ b/catalyst_voices_packages/catalyst_cardano_serialization/lib/catalyst_cardano_serialization.dart
@@ -0,0 +1,7 @@
+export 'src/address.dart';
+export 'src/exceptions.dart';
+export 'src/fees.dart';
+export 'src/hashes.dart';
+export 'src/transaction.dart';
+export 'src/types.dart';
+export 'src/witness.dart';
diff --git a/catalyst_voices_packages/catalyst_cardano_serialization/lib/src/address.dart b/catalyst_voices_packages/catalyst_cardano_serialization/lib/src/address.dart
new file mode 100644
index 0000000000..a0aefa1477
--- /dev/null
+++ b/catalyst_voices_packages/catalyst_cardano_serialization/lib/src/address.dart
@@ -0,0 +1,128 @@
+// Copyright 2021 Richard Easterling
+// SPDX-License-Identifier: Apache-2.0
+
+// ignore_for_file: avoid_equals_and_hash_code_on_mutable_classes
+
+import 'package:bip32_ed25519/bip32_ed25519.dart';
+import 'package:catalyst_cardano_serialization/src/exceptions.dart';
+import 'package:catalyst_cardano_serialization/src/types.dart';
+import 'package:cbor/cbor.dart';
+
+/// [ShelleyAddress] supports bech32 encoded addresses as defined in CIP19.
+class ShelleyAddress {
+  /// The prefix of a base address.
+  static const String defaultAddrHrp = 'addr';
+
+  /// The prefix of a stake/reward address.
+  static const String defaultRewardHrp = 'stake';
+
+  /// The hrp suffix of an address on testnet network.
+  static const String testnetHrpSuffix = '_test';
+
+  static const Bech32Encoder _mainNetEncoder =
+      Bech32Encoder(hrp: defaultAddrHrp);
+  static const Bech32Encoder _testNetEncoder =
+      Bech32Encoder(hrp: defaultAddrHrp + testnetHrpSuffix);
+  static const Bech32Encoder _mainNetRewardEncoder =
+      Bech32Encoder(hrp: defaultRewardHrp);
+  static const Bech32Encoder _testNetRewardEncoder =
+      Bech32Encoder(hrp: defaultRewardHrp + testnetHrpSuffix);
+
+  /// Raw bytes of address.
+  /// Format [ 8 bit header | payload ]
+  final Uint8List bytes;
+
+  /// The prefix specifying the address type and networkId.
+  final String hrp;
+
+  /// The constructor for [ShelleyAddress] from raw [bytes] and [hrp].
+  ShelleyAddress(List<int> bytes, {this.hrp = defaultAddrHrp})
+      : bytes = Uint8List.fromList(bytes);
+
+  /// The constructor which parses the address from bech32 format.
+  factory ShelleyAddress.fromBech32(String address) {
+    final hrp = _hrpPrefix(address);
+    if (hrp.isEmpty) {
+      throw InvalidAddressException(
+        'not a valid Bech32 address - no prefix: $address',
+      );
+    }
+
+    switch (hrp) {
+      case defaultAddrHrp:
+        return ShelleyAddress(_mainNetEncoder.decode(address), hrp: hrp);
+      case const (defaultAddrHrp + testnetHrpSuffix):
+        return ShelleyAddress(_testNetEncoder.decode(address), hrp: hrp);
+      case defaultRewardHrp:
+        return ShelleyAddress(_mainNetRewardEncoder.decode(address), hrp: hrp);
+      case const (defaultRewardHrp + testnetHrpSuffix):
+        return ShelleyAddress(_testNetRewardEncoder.decode(address), hrp: hrp);
+      default:
+        return ShelleyAddress(
+          Bech32Encoder(hrp: hrp).decode(address),
+          hrp: hrp,
+        );
+    }
+  }
+
+  /// Returns the [NetworkId] related to this address.
+  NetworkId get network => NetworkId.testnet.id == (bytes[0] & 0x0f)
+      ? NetworkId.testnet
+      : NetworkId.mainnet;
+
+  /// Encodes the address in bech32 format.
+  String toBech32() {
+    final prefix = _computeHrp(network, hrp);
+    switch (prefix) {
+      case defaultAddrHrp:
+        return _mainNetEncoder.encode(bytes);
+      case const (defaultAddrHrp + testnetHrpSuffix):
+        return _testNetEncoder.encode(bytes);
+      case defaultRewardHrp:
+        return _mainNetRewardEncoder.encode(bytes);
+      case const (defaultRewardHrp + testnetHrpSuffix):
+        return _testNetRewardEncoder.encode(bytes);
+      default:
+        return Bech32Encoder(hrp: prefix).encode(bytes);
+    }
+  }
+
+  /// Serializes the type as cbor.
+  CborValue toCbor() => CborBytes(bytes);
+
+  @override
+  int get hashCode => Object.hash(bytes, hrp);
+
+  @override
+  bool operator ==(Object other) {
+    if (identical(this, other)) return true;
+    if (other is! ShelleyAddress) return false;
+    if (bytes.length != other.bytes.length) return false;
+    if (hrp != other.hrp) return false;
+
+    for (var i = 0; i < bytes.length; i++) {
+      if (bytes[i] != other.bytes[i]) return false;
+    }
+    return true;
+  }
+
+  @override
+  String toString() => toBech32();
+
+  /// If were using the testnet, make sure the hrp ends with '_test'
+  static String _computeHrp(NetworkId id, String prefix) {
+    if (id == NetworkId.mainnet) {
+      return prefix;
+    } else if (prefix.endsWith(testnetHrpSuffix)) {
+      return prefix;
+    } else {
+      return prefix + testnetHrpSuffix;
+    }
+  }
+
+  static String _hrpPrefix(String addr) {
+    final s = addr.trim();
+    final i = s.indexOf('1');
+    return s.substring(0, i > 0 ? i : 0);
+  }
+}
diff --git a/catalyst_voices_packages/catalyst_cardano_serialization/lib/src/exceptions.dart b/catalyst_voices_packages/catalyst_cardano_serialization/lib/src/exceptions.dart
new file mode 100644
index 0000000000..ba6eb0c25a
--- /dev/null
+++ b/catalyst_voices_packages/catalyst_cardano_serialization/lib/src/exceptions.dart
@@ -0,0 +1,90 @@
+import 'package:catalyst_cardano_serialization/src/types.dart';
+
+/// Exception thrown when the transaction exceeds the allowed maximum size.
+final class MaxTxSizeExceededException implements Exception {
+  /// The maximum amount of bytes per transaction.
+  final int maxTxSize;
+
+  /// The amount of bytes of transaction that exceeded it's maximum size.
+  final int actualTxSize;
+
+  /// The default constructor for [MaxTxSizeExceededException].
+  const MaxTxSizeExceededException({
+    required this.maxTxSize,
+    required this.actualTxSize,
+  });
+
+  @override
+  String toString() => 'MaxTxSizeExceededException('
+      'maxTxSize:$maxTxSize'
+      ', actualTxSize:$actualTxSize'
+      ')';
+}
+
+/// Exception thrown when the transaction outputs exceed the inputs.
+final class InsufficientUtxoBalanceException implements Exception {
+  /// The amount of [Coin] that user has.
+  final Coin actualAmount;
+
+  /// The amount of [Coin] that user wants to spend.
+  final Coin requiredAmount;
+
+  /// The default constructor for [InsufficientUtxoBalanceException].
+  const InsufficientUtxoBalanceException({
+    required this.actualAmount,
+    required this.requiredAmount,
+  });
+
+  @override
+  String toString() => 'InsufficientUtxoBalanceException('
+      'actualAmount:$actualAmount'
+      ', requiredAmount:$requiredAmount'
+      ')';
+}
+
+/// Exception thrown when building a transaction that doesn't specify the fee.
+final class TxFeeNotSpecifiedException implements Exception {
+  /// The default constructor for [TxFeeNotSpecifiedException].
+  const TxFeeNotSpecifiedException();
+
+  @override
+  String toString() => 'TxFeeNotSpecifiedException';
+}
+
+/// Exception thrown when parsing a hash that has incorrect length.
+final class HashFormatException implements Exception {
+  /// The default constructor for [HashFormatException].
+  const HashFormatException();
+
+  @override
+  String toString() => 'HashFormatException';
+}
+
+/// Exception thrown if the address doesn't match the bech32 specification
+/// for Shelley addresses.
+final class InvalidAddressException implements Exception {
+  /// Exception details.
+  final String message;
+
+  /// Default constructor [InvalidAddressException].
+  const InvalidAddressException(this.message);
+
+  @override
+  String toString() => 'InvalidAddressException: $message';
+}
+
+/// Exception thrown when the number of witnesses doesn't match
+/// the expected amount.
+///
+/// When calculating the fee for the transaction the amount of witnesses
+/// needs to be specified since they affect the transaction bytes length.
+/// 
+/// Thus less or more witnesses than were included when calculating
+/// the fee are not allowed.
+final class InvalidTransactionWitnessesException implements Exception {
+  /// The default constructor for [InvalidTransactionWitnessesException].
+  const InvalidTransactionWitnessesException();
+
+  @override
+  String toString() => 'InvalidTransactionWitnessesException';
+}
diff --git a/catalyst_voices_packages/catalyst_cardano_serialization/lib/src/fees.dart b/catalyst_voices_packages/catalyst_cardano_serialization/lib/src/fees.dart
new file mode 100644
index 0000000000..a47471798c
--- /dev/null
+++ b/catalyst_voices_packages/catalyst_cardano_serialization/lib/src/fees.dart
@@ -0,0 +1,30 @@
+import 'package:catalyst_cardano_serialization/src/transaction.dart';
+import 'package:catalyst_cardano_serialization/src/types.dart';
+import 'package:cbor/cbor.dart';
+
+/// Calculates fees for the transaction on Cardano blockchain.
+///
+/// The fee is calculated using the following formula:
+/// - `fee = constant + tx.bytes.len * coefficient`
+final class LinearFee {
+  /// The constant amount of [Coin] that is charged per transaction.
+  final Coin constant;
+
+  /// The amount of [Coin] per transaction byte that is charged per transaction.
+  final Coin coefficient;
+
+  /// The default constructor for the [LinearFee].
+  /// The parameters are Cardano protocol parameters.
+  const LinearFee({
+    required this.constant,
+    required this.coefficient,
+  });
+
+  /// Calculates the fee for the transaction denominated in lovelaces.
+  ///
+  /// The formula doesn't take into account smart contract scripts.
+  Coin minNoScriptFee(Transaction tx) {
+    final bytesCount = cbor.encode(tx.toCbor()).length;
+    return Coin(bytesCount) * coefficient + constant;
+  }
+}
diff --git a/catalyst_voices_packages/catalyst_cardano_serialization/lib/src/hashes.dart b/catalyst_voices_packages/catalyst_cardano_serialization/lib/src/hashes.dart
new file mode 100644
index 0000000000..e499cbc87b
--- /dev/null
+++ b/catalyst_voices_packages/catalyst_cardano_serialization/lib/src/hashes.dart
@@ -0,0 +1,110 @@
+// ignore_for_file: avoid_equals_and_hash_code_on_mutable_classes
+
+import 'dart:typed_data';
+
+import 'package:catalyst_cardano_serialization/src/exceptions.dart';
+import 'package:catalyst_cardano_serialization/src/transaction.dart';
+import 'package:cbor/cbor.dart';
+import 'package:convert/convert.dart';
+import 'package:pinenacl/digests.dart';
+
+/// Implements a common base of hash types that holds
+/// binary [bytes] of exact [length].
+abstract base class BaseHash {
+  /// The raw [bytes] of a hash.
+  final List<int> bytes;
+
+  /// Constructs the [BaseHash] from raw [bytes].
+  BaseHash.fromBytes({required this.bytes}) {
+    if (bytes.length != length) {
+      throw const HashFormatException();
+    }
+  }
+
+  /// Constructs the [BaseHash] from a hex string representation
+  /// of [bytes].
+  BaseHash.fromHex(String string) : this.fromBytes(bytes: hex.decode(string));
+
+  /// The expected length of the transaction hash bytes.
+  int get length;
+
+  /// Serializes the type as cbor.
+  CborValue toCbor() => CborBytes(bytes);
+
+  /// Returns the hex string representation of [bytes].
+  String toHex() => hex.encode(bytes);
+
+  @override
+  String toString() => toHex();
+
+  @override
+  int get hashCode => Object.hash(bytes, length);
+
+  @override
+  bool operator ==(Object other) {
+    if (identical(this, other)) return true;
+    if (other is! BaseHash) return false;
+
+    // prevent subclasses of different types to be equal to each other,
+    // even if they hold the same bytes they represent different kinds
+    if (other.runtimeType != runtimeType) return false;
+
+    if (length != other.length) return false;
+
+    for (var i = 0; i < bytes.length; i++) {
+      if (bytes[i] != other.bytes[i]) return false;
+    }
+
+    return true;
+  }
+}
+
+/// Describes the hash of the transaction which serves as proof
+/// of transaction validation.
+final class TransactionHash extends BaseHash {
+  static const int _length = 32;
+
+  /// Constructs the [TransactionHash] from raw [bytes].
+  TransactionHash.fromBytes({required super.bytes}) : super.fromBytes();
+
+  /// Constructs the [TransactionHash] from a hex string representation
+  /// of [bytes].
+  TransactionHash.fromHex(super.string) : super.fromHex();
+
+  /// Constructs the [TransactionHash] from a [TransactionBody].
+  TransactionHash.fromTransactionBody(TransactionBody body)
+      : super.fromBytes(
+          bytes: Hash.blake2b(
+            Uint8List.fromList(cbor.encode(body.toCbor())),
+            digestSize: _length,
+          ),
+        );
+
+  @override
+  int get length => _length;
+}
+
+/// Describes the hash of auxiliary data which is included
+/// in the transaction body.
+final class AuxiliaryDataHash extends BaseHash {
+  static const int _length = 32;
+
+  /// Constructs the [AuxiliaryDataHash] from raw [bytes].
+  AuxiliaryDataHash.fromBytes({required super.bytes}) : super.fromBytes();
+
+  /// Constructs the [AuxiliaryDataHash] from a hex string representation
+  /// of [bytes].
+  AuxiliaryDataHash.fromHex(super.string) : super.fromHex();
+
+  /// Constructs the [AuxiliaryDataHash] from a [AuxiliaryData].
+  AuxiliaryDataHash.fromAuxiliaryData(AuxiliaryData data)
+      : super.fromBytes(
+          bytes: Hash.blake2b(
+            Uint8List.fromList(cbor.encode(data.toCbor())),
+            digestSize: _length,
+          ),
+        );
+
+  @override
+  int get length => _length;
+}
diff --git a/catalyst_voices_packages/catalyst_cardano_serialization/lib/src/transaction.dart b/catalyst_voices_packages/catalyst_cardano_serialization/lib/src/transaction.dart
new file mode 100644
index 0000000000..5b26b34d08
--- /dev/null
+++ b/catalyst_voices_packages/catalyst_cardano_serialization/lib/src/transaction.dart
@@ -0,0 +1,178 @@
+import 'package:catalyst_cardano_serialization/src/address.dart';
+import 'package:catalyst_cardano_serialization/src/hashes.dart';
+import 'package:catalyst_cardano_serialization/src/types.dart';
+import 'package:catalyst_cardano_serialization/src/utils/cbor.dart';
+import 'package:catalyst_cardano_serialization/src/witness.dart';
+import 'package:cbor/cbor.dart';
+
+/// Represents the signed transaction with a list of witnesses
+/// which are used to verify the validity of a transaction.
+final class Transaction {
+  /// The transaction body containing the inputs, outputs, fees, etc.
+  final TransactionBody body;
+
+  /// The set of witnesses that have signed given transaction.
+  final TransactionWitnessSet witnessSet;
+
+  /// True if the transaction is valid, false otherwise.
+  final bool isValid;
+
+  /// The optional transaction metadata.
+  final AuxiliaryData? auxiliaryData;
+
+  /// The default constructor for the [Transaction].
+  const Transaction({
+    required this.body,
+    required this.isValid,
+    required this.witnessSet,
+    this.auxiliaryData,
+  });
+
+  /// Serializes the type as cbor.
+  CborValue toCbor() {
+    return CborList([
+      body.toCbor(),
+      witnessSet.toCbor(),
+      CborBool(isValid),
+      (auxiliaryData ?? const AuxiliaryData()).toCbor(),
+    ]);
+  }
+}
+
+/// Represents the details of a transaction including inputs, outputs, fee, etc.
+///
+/// Does not contain the witnesses which are used to verify the transaction.
+final class TransactionBody {
+  /// The transaction inputs.
+  final Set<TransactionInput> inputs;
+
+  /// The transaction outputs.
+  final List<TransactionOutput> outputs;
+
+  /// The fee for the transaction.
+  final Coin fee;
+
+  /// The absolute slot value before the tx becomes invalid.
+  final SlotBigNum? ttl;
+
+  /// The hash of the optional [AuxiliaryData]
+  /// which is the metadata of the transaction.
+  final AuxiliaryDataHash? auxiliaryDataHash;
+
+  /// Specifies on which network the code will run.
+  final NetworkId? networkId;
+
+  /// The default constructor for [TransactionBody].
+  const TransactionBody({
+    required this.inputs,
+    required this.outputs,
+    required this.fee,
+    this.ttl,
+    this.auxiliaryDataHash,
+    this.networkId,
+  });
+
+  /// Serializes the type as cbor.
+  CborValue toCbor() {
+    return CborMap({
+      const CborSmallInt(0): CborList([
+        for (final input in inputs) input.toCbor(),
+      ]),
+      const CborSmallInt(1): CborList([
+        for (final output in outputs) output.toCbor(),
+      ]),
+      const CborSmallInt(2): fee.toCbor(),
+      if (ttl != null) const CborSmallInt(3): ttl!.toCbor(),
+    });
+  }
+}
+
+/// The transaction output of a previous transaction,
+/// acts as input for the next transaction.
+final class TransactionInput {
+  /// The hash of the given transaction.
+  final TransactionHash transactionId;
+
+  /// The index of the utxo in the given transaction.
+  final int index;
+
+  /// The default constructor for [TransactionInput].
+  const TransactionInput({
+    required this.transactionId,
+    required this.index,
+  });
+
+  /// Serializes the type as cbor.
+  CborValue toCbor() {
+    return CborList([
+      transactionId.toCbor(),
+      CborSmallInt(index),
+    ]);
+  }
+}
+
+/// The transaction output which assigns the owner of given address
+/// with leftover change from previous transaction.
+final class TransactionOutput {
+  /// The address associated with the transaction.
+  final ShelleyAddress address;
+
+  /// The leftover change from the previous transaction that can be spent.
+  final Coin amount;
+
+  /// The default constructor for the [TransactionOutput].
+  const TransactionOutput({
+    required this.address,
+    required this.amount,
+  });
+
+  /// Serializes the type as cbor.
+  CborValue toCbor() {
+    return CborList([
+      address.toCbor(),
+      amount.toCbor(),
+    ]);
+  }
+}
+
+/// The UTXO that can be used as an input in a new transaction.
+final class TransactionUnspentOutput {
+  /// The transaction output of a previous transaction,
+  /// acts as input for the next transaction.
+  final TransactionInput input;
+
+  /// The transaction output which assigns the owner of given address
+  /// with leftover change from previous transaction.
+  final TransactionOutput output;
+
+  /// The default constructor for [TransactionUnspentOutput].
+  const TransactionUnspentOutput({
+    required this.input,
+    required this.output,
+  });
+
+  /// Serializes the type as cbor.
+  CborValue toCbor() {
+    return CborList([
+      input.toCbor(),
+      output.toCbor(),
+    ]);
+  }
+}
+
+/// The transaction metadata as a list of key-value pairs (a map).
+final class AuxiliaryData {
+  /// The transaction metadata map.
+  final Map<CborSmallInt, CborValue> map;
+
+  /// The default constructor for the [AuxiliaryData].
+  const AuxiliaryData({this.map = const {}});
+
+  /// Serializes the type as cbor.
+  CborValue toCbor() {
+    return CborMap(
+      map,
+      tags: map.isNotEmpty ? const [] : [CborCustomTags.map],
+    );
+  }
+}
diff --git a/catalyst_voices_packages/catalyst_cardano_serialization/lib/src/types.dart b/catalyst_voices_packages/catalyst_cardano_serialization/lib/src/types.dart
new file mode 100644
index 0000000000..addf9f731c
--- /dev/null
+++ b/catalyst_voices_packages/catalyst_cardano_serialization/lib/src/types.dart
@@ -0,0 +1,52 @@
+import 'package:cbor/cbor.dart';
+
+/// Specifies on which network the code will run.
+enum NetworkId {
+  /// The production network
+  mainnet(id: 1),
+
+  /// The test network.
+  testnet(id: 0);
+
+  /// The magic protocol number acting as the identifier of the network.
+  final int id;
+
+  const NetworkId({required this.id});
+}
+
+/// Specifies an amount of ADA in terms of lovelace.
+extension type const Coin(int value) {
+  /// Adds [other] value to this value and returns a new [Coin].
+  Coin operator +(Coin other) => Coin(value + other.value);
+
+  /// Subtracts [other] values from this value and returns a new [Coin].
+  Coin operator -(Coin other) => Coin(value - other.value);
+
+  /// Multiplies this value by [other] values and returns a new [Coin].
+  Coin operator *(Coin other) => Coin(value * other.value);
+
+  /// Divides this value by [other] value without remainder
+  /// and returns a new [Coin].
+  Coin operator ~/(Coin other) => Coin(value ~/ other.value);
+
+  /// Returns true if [value] is greater than [other] value.
+  bool operator >(Coin other) => value > other.value;
+
+  /// Returns true if [value] is greater than or equal [other] value.
+  bool operator >=(Coin other) => value > other.value || value == other.value;
+
+  /// Returns true if [value] is smaller than [other] value.
+  bool operator <(Coin other) => value < other.value;
+
+  /// Returns true if [value] is smaller than or equal [other] value.
+  bool operator <=(Coin other) => value < other.value || value == other.value;
+
+  /// Serializes the type as cbor.
+  CborValue toCbor() => CborSmallInt(value);
+}
+
+/// A blockchain slot number.
+extension type const SlotBigNum(int value) {
+  /// Serializes the type as cbor.
+  CborValue toCbor() => CborSmallInt(value);
+}
diff --git a/catalyst_voices_packages/catalyst_cardano_serialization/lib/src/utils/cbor.dart b/catalyst_voices_packages/catalyst_cardano_serialization/lib/src/utils/cbor.dart
new file mode 100644
index 0000000000..6ce64d2ee1
--- /dev/null
+++ b/catalyst_voices_packages/catalyst_cardano_serialization/lib/src/utils/cbor.dart
@@ -0,0 +1,48 @@
+/// Holds cbor tags not specified by the official cbor package.
+final class CborCustomTags {
+  const CborCustomTags._();
+
+  /// A cbor tag describing a key-value pairs data.
+  static const int map = 259;
+}
+
+/// How many bytes are used in cbor encoding for a major type/length.
+enum CborSize {
+  /// Length/data is encoded inside of the type information.
+  inline(bytes: 0),
+
+  /// Length/data is in 1 byte following the type information.
+  one(bytes: 1),
+
+  /// Length/data is in 2 bytes following the type information.
+  two(bytes: 2),
+
+  /// Length/data is in 4 bytes following the type information.
+  four(bytes: 4),
+
+  /// Length/data is in 8 bytes following the type information.
+  eight(bytes: 8);
+
+  /// The amount of bytes it takes to encode the type in cbor.
+  final int bytes;
+
+  const CborSize({required this.bytes});
+
+  /// The max int value that can be inlined in cbor without extra bytes.
+  static const int maxInlineEncoding = 23;
+
+  /// Calculates the [CborSize] for arbitrary [value].
+  static CborSize ofInt(int value) {
+    if (value <= maxInlineEncoding) {
+      return CborSize.inline;
+    } else if (value < 0x100) {
+      return CborSize.one;
+    } else if (value < 0x10000) {
+      return CborSize.two;
+    } else if (value < 0x100000000) {
+      return CborSize.four;
+    } else {
+      return CborSize.eight;
+    }
+  }
+}
diff --git a/catalyst_voices_packages/catalyst_cardano_serialization/lib/src/witness.dart b/catalyst_voices_packages/catalyst_cardano_serialization/lib/src/witness.dart
new file mode 100644
index 0000000000..7ad376805f
--- /dev/null
+++ b/catalyst_voices_packages/catalyst_cardano_serialization/lib/src/witness.dart
@@ -0,0 +1,93 @@
+import 'package:cbor/cbor.dart';
+
+/// A set of witnesses that sign the transaction.
+class TransactionWitnessSet {
+  /// The witnesses that sign the transaction.
+  final Set<VkeyWitness> vkeyWitnesses;
+
+  /// The default constructor for [TransactionWitnessSet].
+  const TransactionWitnessSet({required this.vkeyWitnesses});
+
+  /// Serializes the type as cbor.
+  CborValue toCbor() {
+    return CborMap({
+      for (final vkey in vkeyWitnesses.indexed)
+        CborSmallInt(vkey.$1): vkey.$2.toCbor(),
+    });
+  }
+}
+
+/// The transaction witness with a [signature] of the transaction.
+class VkeyWitness {
+  /// The public key of the witness.
+  final Vkey vkey;
+
+  /// The witness signature of the transaction.
+  final Ed25519Signature signature;
+
+  /// The default constructor for [VkeyWitness].
+  const VkeyWitness({
+    required this.vkey,
+    required this.signature,
+  });
+
+  /// Builds a fake [VkeyWitness] that helps to measure target transaction
+  /// size when the transaction hasn't been signed yet.
+  factory VkeyWitness.seeded(int byte) {
+    return VkeyWitness(
+      vkey: Vkey.seeded(byte),
+      signature: Ed25519Signature.seeded(byte),
+    );
+  }
+
+  /// Serializes the type as cbor.
+  CborValue toCbor() {
+    return CborList([
+      vkey.toCbor(),
+      signature.toCbor(),
+    ]);
+  }
+}
+
+/// The public key of the witness.
+extension type Vkey._(List<int> bytes) {
+  /// The length of the [Vkey].
+  static const int length = 32;
+
+  /// The default constructor for [Vkey].
+  Vkey.fromBytes(this.bytes) {
+    if (bytes.length != length) {
+      throw ArgumentError('Vkey length does not match: ${bytes.length}');
+    }
+  }
+
+  /// Returns the [Vkey] filled with [byte] that can be
+  /// used to reserve size to calculate the final transaction bytes size.
+  factory Vkey.seeded(int byte) => Vkey.fromBytes(List.filled(length, byte));
+
+  /// Serializes the type as cbor.
+  CborValue toCbor() => CborBytes(bytes);
+}
+
+/// The witness signature of the transaction.
+extension type Ed25519Signature._(List<int> bytes) {
+  /// The length of the [Ed25519Signature].
+  static const int length = 64;
+
+  /// The default constructor for [Ed25519Signature].
+  Ed25519Signature.fromBytes(this.bytes) {
+    if (bytes.length != length) {
+      throw ArgumentError(
+        'Ed25519Signature length does not match: ${bytes.length}',
+      );
+    }
+  }
+
+  /// Returns the [Ed25519Signature] filled with [byte] that can be
+  /// used to reserve size to calculate the final transaction bytes size.
+  factory Ed25519Signature.seeded(int byte) =>
+      Ed25519Signature.fromBytes(List.filled(length, byte));
+
+  /// Serializes the type as cbor.
+  CborValue toCbor() => CborBytes(bytes);
+}
diff --git a/catalyst_voices_packages/catalyst_cardano_serialization/pubspec.yaml b/catalyst_voices_packages/catalyst_cardano_serialization/pubspec.yaml
new file mode 100644
index 0000000000..c6c0c143b1
--- /dev/null
+++ b/catalyst_voices_packages/catalyst_cardano_serialization/pubspec.yaml
@@ -0,0 +1,21 @@
+name: catalyst_cardano_serialization
+description: Dart package providing serialization/deserialization for common structures for Cardano blockchain.
+repository: https://github.com/input-output-hk/catalyst-voices/tree/main/catalyst_voices_packages/catalyst_cardano_serialization
+issue_tracker: https://github.com/input-output-hk/catalyst-voices/issues
+topics: [blockchain, cardano, cryptocurrency, wallet]
+version: 0.1.0
+
+environment:
+  sdk: ">=3.3.0 <4.0.0"
+
+dependencies:
+  bech32: ^0.2.2
+  bip32_ed25519: ^0.5.0
+  cbor: ^6.2.0
+  convert: ^3.1.1
+  pinenacl: ^0.5.1
+
+dev_dependencies:
+  catalyst_analysis:
+    path: ../catalyst_analysis
+  test: ^1.24.9
diff --git a/catalyst_voices_packages/catalyst_cardano_serialization/test/address_test.dart b/catalyst_voices_packages/catalyst_cardano_serialization/test/address_test.dart
new file mode 100644
index 0000000000..4775dd82ce
--- /dev/null
+++ b/catalyst_voices_packages/catalyst_cardano_serialization/test/address_test.dart
@@ -0,0 +1,74 @@
+import 'package:catalyst_cardano_serialization/src/address.dart';
+import 'package:catalyst_cardano_serialization/src/types.dart';
+import 'package:test/test.dart';
+
+import 'test_utils/test_data.dart';
+
+void main() {
+  group(ShelleyAddress, () {
+    test('round-trip conversion from and to bytes', () {
+      expect(
+        ShelleyAddress(mainnetAddr.bytes, hrp: mainnetAddr.hrp),
+        equals(mainnetAddr),
+      );
+
+      expect(
+        ShelleyAddress(testnetAddr.bytes, hrp: testnetAddr.hrp),
+        equals(testnetAddr),
+      );
+
+      expect(
+        ShelleyAddress(mainnetStakeAddr.bytes, hrp: mainnetStakeAddr.hrp),
+        equals(mainnetStakeAddr),
+      );
+
+      expect(
+        ShelleyAddress(testnetStakeAddr.bytes, hrp: testnetStakeAddr.hrp),
+        equals(testnetStakeAddr),
+      );
+    });
+
+    test('round-trip conversion from and to bech32', () {
+      expect(
+        ShelleyAddress.fromBech32(mainnetAddr.toBech32()),
+        equals(mainnetAddr),
+      );
+
+      expect(
+        ShelleyAddress.fromBech32(testnetAddr.toBech32()),
+        equals(testnetAddr),
+      );
+
+      expect(
+        ShelleyAddress.fromBech32(mainnetStakeAddr.toBech32()),
+        equals(mainnetStakeAddr),
+      );
+
+      expect(
+        ShelleyAddress.fromBech32(testnetStakeAddr.toBech32()),
+        equals(testnetStakeAddr),
+      );
+    });
+
+    test('hrp from address', () {
+      expect(mainnetAddr.hrp, equals('addr'));
+      expect(testnetAddr.hrp, equals('addr_test'));
+      expect(mainnetStakeAddr.hrp, equals('stake'));
+      expect(testnetStakeAddr.hrp, equals('stake_test'));
+    });
+
+    test('network ID from address', () {
+      expect(mainnetAddr.network, equals(NetworkId.mainnet));
+      expect(testnetAddr.network, equals(NetworkId.testnet));
+      expect(mainnetStakeAddr.network, equals(NetworkId.mainnet));
+      expect(testnetStakeAddr.network, equals(NetworkId.testnet));
+    });
+
+    test('toString returns bech32', () {
+      expect(mainnetAddr.toString(), equals(mainnetAddr.toBech32()));
+      expect(testnetAddr.toString(), equals(testnetAddr.toBech32()));
+      expect(mainnetStakeAddr.toString(), equals(mainnetStakeAddr.toBech32()));
+      expect(testnetStakeAddr.toString(), equals(testnetStakeAddr.toBech32()));
+    });
+  });
+}
diff --git a/catalyst_voices_packages/catalyst_cardano_serialization/test/fees_test.dart b/catalyst_voices_packages/catalyst_cardano_serialization/test/fees_test.dart
new file mode 100644
index 0000000000..82482ec4b5
--- /dev/null
+++ b/catalyst_voices_packages/catalyst_cardano_serialization/test/fees_test.dart
@@ -0,0 +1,39 @@
+import 'package:catalyst_cardano_serialization/src/fees.dart';
+import 'package:catalyst_cardano_serialization/src/types.dart';
+import 'package:test/test.dart';
+
+import 'test_utils/test_data.dart';
+
+void main() {
+  group(LinearFee, () {
+    test('minFeeNoScript with current protocol params', () {
+      const linearFee = LinearFee(
+        constant: Coin(155381),
+        coefficient: Coin(44),
+      );
+
+      final tx = fullTestTransaction();
+      expect(linearFee.minNoScriptFee(tx), equals(159693));
+    });
+
+    test('minFeeNoScript with constant fee only', () {
+      const linearFee = LinearFee(
+        constant: Coin(155381),
+        coefficient: Coin(0),
+      );
+
+      final tx = fullTestTransaction();
+      expect(linearFee.minNoScriptFee(tx), equals(linearFee.constant));
+    });
+
+    test('minFeeNoScript with coefficient fee only', () {
+      const linearFee = LinearFee(
+        constant: Coin(0),
+        coefficient: Coin(44),
+      );
+
+      final tx = fullTestTransaction();
+      expect(linearFee.minNoScriptFee(tx), equals(4312));
+    });
+  });
+}
diff --git a/catalyst_voices_packages/catalyst_cardano_serialization/test/hashes_test.dart b/catalyst_voices_packages/catalyst_cardano_serialization/test/hashes_test.dart
new file mode 100644
index 0000000000..d68b88516b
--- /dev/null
+++ b/catalyst_voices_packages/catalyst_cardano_serialization/test/hashes_test.dart
@@ -0,0 +1,92 @@
+import 'package:catalyst_cardano_serialization/src/hashes.dart';
+import 'package:catalyst_cardano_serialization/src/transaction.dart';
+import 'package:catalyst_cardano_serialization/src/types.dart';
+import 'package:cbor/cbor.dart';
+import 'package:convert/convert.dart';
+import 'package:test/test.dart';
+
+void main() {
+  group(TransactionHash, () {
+    const hexString =
+        '4d3f576f26db29139981a69443c2325daa812cc353a31b5a4db794a5bcbb06c2';
+    final bytes = hex.decode(hexString);
+
+    test('from and to hex', () {
+      final hash = TransactionHash.fromHex(hexString);
+      expect(hash.toHex(), equals(hexString));
+    });
+
+    test('from and to bytes', () {
+      final hash = TransactionHash.fromBytes(bytes: bytes);
+      expect(hash.bytes, equals(bytes));
+    });
+
+    test('from transaction body', () {
+      const body = TransactionBody(
+        inputs: {},
+        outputs: [],
+        fee: Coin(0),
+      );
+
+      final hash = TransactionHash.fromTransactionBody(body);
+      expect(
+        hash,
+        equals(
+          TransactionHash.fromHex(
+            '36fdff68dfe3660f1ceea60f018a0fd7a83da13def229108794c397a879b0436',
+          ),
+        ),
+      );
+    });
+
+    test('toCbor returns bytes', () {
+      final hash = TransactionHash.fromBytes(bytes: bytes);
+      final encodedCbor = cbor.encode(hash.toCbor());
+      final decodedCbor = cbor.decode(encodedCbor);
+      expect(decodedCbor, isA<CborBytes>());
+      expect((decodedCbor as CborBytes).bytes, equals(bytes));
+    });
+  });
+
+  group(AuxiliaryDataHash, () {
+    const hexString =
+        '4d3f576f26db29139981a69443c2325daa812cc353a31b5a4db794a5bcbb06c2';
+    final bytes = hex.decode(hexString);
+
+    test('from and to hex', () {
+      final hash = AuxiliaryDataHash.fromHex(hexString);
+      expect(hash.toHex(), equals(hexString));
+    });
+
+    test('from and to bytes', () {
+      final hash = AuxiliaryDataHash.fromBytes(bytes: bytes);
+      expect(hash.bytes, equals(bytes));
+    });
+
+    test('from auxiliary data', () {
+      final data = AuxiliaryData(
+        map: {
+          const CborSmallInt(1): CborString('Test'),
+        },
+      );
+
+      final hash = AuxiliaryDataHash.fromAuxiliaryData(data);
+      expect(
+        hash,
+        equals(
+          AuxiliaryDataHash.fromHex(
+            '568d2b7d4052f6ce9f2c60b942b10da9d19e60c8bf24b17aa7bcfb3caffcc1ea',
+          ),
+        ),
+      );
+    });
+
+    test('toCbor returns bytes', () {
+      final hash = AuxiliaryDataHash.fromBytes(bytes: bytes);
+      final encodedCbor = cbor.encode(hash.toCbor());
+      final decodedCbor = cbor.decode(encodedCbor);
+      expect(decodedCbor, isA<CborBytes>());
+      expect((decodedCbor as CborBytes).bytes, equals(bytes));
+    });
+  });
+}
diff --git a/catalyst_voices_packages/catalyst_cardano_serialization/test/test_utils/test_data.dart b/catalyst_voices_packages/catalyst_cardano_serialization/test/test_utils/test_data.dart
new file mode 100644
index 0000000000..44e148c686
--- /dev/null
+++ b/catalyst_voices_packages/catalyst_cardano_serialization/test/test_utils/test_data.dart
@@ -0,0 +1,87 @@
+import 'package:catalyst_cardano_serialization/src/address.dart';
+import 'package:catalyst_cardano_serialization/src/hashes.dart';
+import 'package:catalyst_cardano_serialization/src/transaction.dart';
+import 'package:catalyst_cardano_serialization/src/types.dart';
+import 'package:catalyst_cardano_serialization/src/witness.dart';
+import 'package:cbor/cbor.dart';
+
+/* cSpell:disable */
+final mainnetAddr = ShelleyAddress.fromBech32(
+  'addr1qx2fxv2umyhttkxyxp8x0dlpdt3k6cwng5pxj3jhsydzer3n0d3vllmyqws'
+  'x5wktcd8cc3sq835lu7drv2xwl2wywfgse35a3x',
+);
+final testnetAddr = ShelleyAddress.fromBech32(
+  'addr_test1vz2fxv2umyhttkxyxp8x0dlpdt3k6cwng5pxj3jhsydzerspjrlsz',
+);
+final mainnetStakeAddr = ShelleyAddress.fromBech32(
+  'stake1uyehkck0lajq8gr28t9uxnuvgcqrc6070x3k9r8048z8y5gh6ffgw',
+);
+final testnetStakeAddr = ShelleyAddress.fromBech32(
+  'stake_test1uqehkck0lajq8gr28t9uxnuvgcqrc6070x3k9r8048z8y5gssrtvn',
+);
+
+final testTransactionHash = TransactionHash.fromHex(
+  '583a3a5150bc7990656020ffb4e5a1be'
+  '1589ce6f1a430aacb8e7e089b894d3d1',
+);
+
+/// Returns a minimal transaction with optional fields skipped.
+Transaction minimalTestTransaction() {
+  return Transaction(
+    body: TransactionBody(
+      inputs: {
+        TransactionInput(
+          transactionId: testTransactionHash,
+          index: 1,
+        ),
+      },
+      outputs: [
+        TransactionOutput(
+          address: testnetAddr,
+          amount: const Coin(5000000),
+        ),
+      ],
+      fee: const Coin(10000000),
+    ),
+    isValid: true,
+    witnessSet: const TransactionWitnessSet(vkeyWitnesses: {}),
+  );
+}
+
+/// Returns a full transaction with all possible optional fields.
+Transaction fullTestTransaction() {
+  final auxiliaryData = AuxiliaryData(
+    map: {
+      const CborSmallInt(1): CborString('Test'),
+    },
+  );
+
+  return Transaction(
+    body: TransactionBody(
+      inputs: {
+        TransactionInput(
+          transactionId: testTransactionHash,
+          index: 1,
+        ),
+      },
+      outputs: [
+        TransactionOutput(
+          address: testnetAddr,
+          amount: const Coin(5000000),
+        ),
+      ],
+      fee: const Coin(10000000),
+      ttl: const SlotBigNum(41001),
+      auxiliaryDataHash: AuxiliaryDataHash.fromAuxiliaryData(auxiliaryData),
+      networkId: NetworkId.testnet,
+    ),
+    isValid: true,
+    // TODO(dtscalac): provide witness
+    witnessSet: const TransactionWitnessSet(
+      vkeyWitnesses: {},
+    ),
+    auxiliaryData: auxiliaryData,
+  );
+}
+
+/* cSpell:enable */
diff --git a/catalyst_voices_packages/catalyst_cardano_serialization/test/transaction_test.dart b/catalyst_voices_packages/catalyst_cardano_serialization/test/transaction_test.dart
new file mode 100644
index 0000000000..52d8f88084
--- /dev/null
+++ b/catalyst_voices_packages/catalyst_cardano_serialization/test/transaction_test.dart
@@ -0,0 +1,38 @@
+import 'package:catalyst_cardano_serialization/src/transaction.dart';
+import 'package:cbor/cbor.dart';
+import 'package:convert/convert.dart';
+import 'package:test/test.dart';
+
+import 'test_utils/test_data.dart';
+
+void main() {
+  group(Transaction, () {
+    test('transaction with all supported fields serialized to bytes', () {
+      final bytes = cbor.encode(fullTestTransaction().toCbor());
+      final hexString = hex.encode(bytes);
+
+      expect(
+        hexString,
+        equals(
+          '84a40081825820583a3a5150bc7990656020ffb4e5a1be1589ce6f1a430aacb8e7e0'
+          '89b894d3d101018182581d609493315cd92eb5d8c4304e67b7e16ae36d61d3450269'
+          '4657811a2c8e1a004c4b40021a009896800319a029a0f5a1016454657374',
+        ),
+      );
+    });
+
+    test('transaction with required fields serialized to bytes', () {
+      final bytes = cbor.encode(minimalTestTransaction().toCbor());
+      final hexString = hex.encode(bytes);
+
+      expect(
+        hexString,
+        equals(
+          '84a30081825820583a3a5150bc7990656020ffb4e5a1be1589ce6f1a430aacb8e7e0'
+          '89b894d3d101018182581d609493315cd92eb5d8c4304e67b7e16ae36d61d3450269'
+          '4657811a2c8e1a004c4b40021a00989680a0f5d90103a0',
+        ),
+      );
+    });
+  });
+}
diff --git a/catalyst_voices_packages/catalyst_cardano_serialization/test/types_test.dart b/catalyst_voices_packages/catalyst_cardano_serialization/test/types_test.dart
new file mode 100644
index 0000000000..7aeeaf13a4
--- /dev/null
+++ b/catalyst_voices_packages/catalyst_cardano_serialization/test/types_test.dart
@@ -0,0 +1,33 @@
+import 'package:catalyst_cardano_serialization/src/types.dart';
+import 'package:test/test.dart';
+
+void main() {
+  group(Coin, () {
+    test('addition', () {
+      expect(const Coin(3) + const Coin(100), equals(const Coin(103)));
+      expect(const Coin(-100) + const Coin(100), equals(const Coin(0)));
+    });
+
+    test('subtraction', () {
+      expect(const Coin(5) - const Coin(2), equals(const Coin(3)));
+      expect(const Coin(10) - const Coin(27), equals(const Coin(-17)));
+    });
+
+    test('multiplication', () {
+      expect(const Coin(3) * const Coin(6), equals(const Coin(18)));
+      expect(const Coin(-5) * const Coin(7), equals(const Coin(-35)));
+    });
+
+    test('division', () {
+      expect(const Coin(3) ~/ const Coin(2), equals(const Coin(1)));
+      expect(const Coin(100) ~/ const Coin(50), equals(const Coin(2)));
+    });
+
+    test('comparison', () {
+      expect(const Coin(3) > const Coin(2), isTrue);
+      expect(const Coin(3) >= const Coin(3), isTrue);
+      expect(const Coin(100) < const Coin(100), isFalse);
+      expect(const Coin(100) <= const Coin(100), isTrue);
+    });
+  });
+}
diff --git a/catalyst_voices_packages/catalyst_cardano_serialization/test/utils/cbor_test.dart b/catalyst_voices_packages/catalyst_cardano_serialization/test/utils/cbor_test.dart
new file mode 100644
index 0000000000..cadd24b03a
--- /dev/null
+++ b/catalyst_voices_packages/catalyst_cardano_serialization/test/utils/cbor_test.dart
@@ -0,0 +1,29 @@
+import 'package:catalyst_cardano_serialization/src/utils/cbor.dart';
+import 'package:test/test.dart';
+
+void main() {
+  group(CborSize, () {
+    test('of int value', () {
+      expect(CborSize.ofInt(0), equals(CborSize.inline));
+      expect(
+        CborSize.ofInt(CborSize.maxInlineEncoding),
+        equals(CborSize.inline),
+      );
+      expect(CborSize.ofInt(0xff), equals(CborSize.one));
+      expect(CborSize.ofInt(0x100), equals(CborSize.two));
+      expect(CborSize.ofInt(0xffff), equals(CborSize.two));
+      expect(CborSize.ofInt(0x10000), equals(CborSize.four));
+      expect(CborSize.ofInt(0xffffffff), equals(CborSize.four));
+      expect(CborSize.ofInt(0x100000000), equals(CborSize.eight));
+      expect(CborSize.ofInt(0xfffffffffffff), equals(CborSize.eight));
+    });
+
+    test('bytes length', () {
+      expect(CborSize.inline.bytes, equals(0));
+      expect(CborSize.one.bytes, equals(1));
+      expect(CborSize.two.bytes, equals(2));
+      expect(CborSize.four.bytes, equals(4));
+      expect(CborSize.eight.bytes, equals(8));
+    });
+  });
+}
diff --git a/catalyst_voices_packages/catalyst_cardano_serialization/test/witness_test.dart b/catalyst_voices_packages/catalyst_cardano_serialization/test/witness_test.dart
new file mode 100644
index 0000000000..ae9f5f0625
--- /dev/null
+++ b/catalyst_voices_packages/catalyst_cardano_serialization/test/witness_test.dart
@@ -0,0 +1,22 @@
+import 'package:catalyst_cardano_serialization/src/witness.dart';
+import 'package:test/test.dart';
+
+void main() {
+  group(Vkey, () {
+    test('seeded has correct length', () {
+      expect(
+        Vkey.seeded(1).bytes.length,
+        equals(Vkey.length),
+      );
+    });
+  });
+
+  group(Ed25519Signature, () {
+    test('seeded has correct length', () {
+      expect(
+        Ed25519Signature.seeded(2).bytes.length,
+        equals(Ed25519Signature.length),
+      );
+    });
+  });
+}
diff --git a/docs/Earthfile b/docs/Earthfile
index 436b628f43..6e10e0ab3c 100644
--- a/docs/Earthfile
+++ b/docs/Earthfile
@@ -1,20 +1,25 @@
-# Set the Earthly version to 0.7
-VERSION 0.7
+VERSION 0.8
+
+IMPORT github.com/input-output-hk/catalyst-ci/earthly/docs:v3.00.0 AS docs-ci
+
+IMPORT .. AS repo
+IMPORT ../catalyst-gateway AS catalyst-gateway
+IMPORT ../catalyst-gateway/event-db AS event-db
 
 # cspell: words mkdocs runable
 
 # Copy all the source we need to build the docs
 src:
     # Common src setup
-    DO github.com/input-output-hk/catalyst-ci/earthly/docs:v2.11.1+SRC
+    DO docs-ci+SRC
 
     # Now copy into that any artifacts we pull from the builds.
-    COPY --dir ../+repo-docs/repo /docs/includes
+    COPY --dir repo+repo-docs/repo /docs/includes
     # copy Rust docs
-    COPY ./../catalyst-gateway+build/doc /docs/src/api/cat-gateway/rust-docs
+    COPY catalyst-gateway+build/doc /docs/src/api/cat-gateway/rust-docs
 
     # Copy docs we build in the postgres example.
-    COPY --dir ../catalyst-gateway/event-db+build/docs src/architecture/08_concepts/event_db
+    COPY --dir event-db+build/docs src/architecture/08_concepts/event_db
 
 
 # Build the docs here.
diff --git a/melos.yaml b/melos.yaml
index 21730e065a..f930ba47bd 100644
--- a/melos.yaml
+++ b/melos.yaml
@@ -24,6 +24,11 @@ command:
       meta: ^1.10.0
       result_type: ^0.2.0
       plugin_platform_interface: ^2.1.7
+      bech32: ^0.2.2
+      bip32_ed25519: ^0.5.0
+      cbor: ^6.2.0
+      convert: ^3.1.1
+      pinenacl: ^0.5.1
     dev_dependencies:
       test: ^1.24.9
       build_runner: ^2.3.3
diff --git a/utilities/wallet-tester/Earthfile b/utilities/wallet-tester/Earthfile
index 0926786d82..1eb1dd76ac 100644
--- a/utilities/wallet-tester/Earthfile
+++ b/utilities/wallet-tester/Earthfile
@@ -1,4 +1,4 @@
-VERSION --try --global-cache 0.7
+VERSION 0.8
 
 # builder - Installs node packages.
 builder: