GnosisHost (#308)

Co-authored-by: David Salami <[email protected]>
polytope-labs · Sep 14, 2024 · 06ebda6 · 06ebda6
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diff --git a/docs/pages/developers/evm/contract-addresses.mdx b/docs/pages/developers/evm/contract-addresses.mdx
@@ -13,7 +13,7 @@ The current testnet environment for the Hyperbridge network.
 |:------------|:-----|
 | `HandlerV1` | [`0xb8b5F80f6f58975970d9A5fb99407CF60A8FD3Ff`](https://sepolia.etherscan.io/address/0xb8b5F80f6f58975970d9A5fb99407CF60A8FD3Ff) |
 | `PingModule` | [`0x42C6551d05eA47c46Fc7B01BBaaD37c466481361`](https://sepolia.etherscan.io/address/0x42C6551d05eA47c46Fc7B01BBaaD37c466481361) |
-| `TokenGateway` | [`0x43B220ae10D0378f974af7F8E46326f9F7cF2cee`](https://sepolia.etherscan.io/address/0x43B220ae10D0378f974af7F8E46326f9F7cF2cee) |
+| `TokenGateway` | [`0xf85a6D74eE7F57C068597f78b250a3657640ecA1`](https://sepolia.etherscan.io/address/0xf85a6D74eE7F57C068597f78b250a3657640ecA1) |
 | `TokenFaucet` | [`0x6Ced0D49EBfe3dee51ccBE744464d18cbf549Ef1`](https://sepolia.etherscan.io/address/0x6Ced0D49EBfe3dee51ccBE744464d18cbf549Ef1) |
 | `FeeToken (USD.h)` | [`0x088f5218efbDfC73992b0906c5d35572DB2db845`](https://sepolia.etherscan.io/address/0x088f5218efbDfC73992b0906c5d35572DB2db845) |
 
@@ -24,7 +24,7 @@ The current testnet environment for the Hyperbridge network.
 |:------------|:-----|
 | `HandlerV1` | [`0xBCb07384915818F6E2fEA3d0e3c19EFa5bef823A`](https://sepolia.arbiscan.io/address/0xBCb07384915818F6E2fEA3d0e3c19EFa5bef823A) |
 | `PingModule` | [`0x42C6551d05eA47c46Fc7B01BBaaD37c466481361`](https://sepolia.arbiscan.io/address/0x42C6551d05eA47c46Fc7B01BBaaD37c466481361) |
-| `TokenGateway` | [`0x43B220ae10D0378f974af7F8E46326f9F7cF2cee`](https://sepolia.arbiscan.io/address/0x43B220ae10D0378f974af7F8E46326f9F7cF2cee) |
+| `TokenGateway` | [`0xf85a6D74eE7F57C068597f78b250a3657640ecA1`](https://sepolia.arbiscan.io/address/0xf85a6D74eE7F57C068597f78b250a3657640ecA1) |
 | `TokenFaucet` | [`0x6Ced0D49EBfe3dee51ccBE744464d18cbf549Ef1`](https://sepolia.arbiscan.io/address/0x6Ced0D49EBfe3dee51ccBE744464d18cbf549Ef1) |
 | `FeeToken (USD.h)` | [`0x088f5218efbDfC73992b0906c5d35572DB2db845`](https://sepolia.arbiscan.io/address/0x088f5218efbDfC73992b0906c5d35572DB2db845) |
 
@@ -35,7 +35,7 @@ The current testnet environment for the Hyperbridge network.
 |:------------|:-----|
 | `HandlerV1` | [`0x78ba8ea54a141b0f6e43070Bb9F9a303F7E05689`](https://sepolia-optimism.etherscan.io/address/0x78ba8ea54a141b0f6e43070Bb9F9a303F7E05689) |
 | `PingModule` | [`0x42C6551d05eA47c46Fc7B01BBaaD37c466481361`](https://sepolia-optimism.etherscan.io/address/0x42C6551d05eA47c46Fc7B01BBaaD37c466481361) |
-| `TokenGateway` | [`0x43B220ae10D0378f974af7F8E46326f9F7cF2cee`](https://sepolia-optimism.etherscan.io/address/0x43B220ae10D0378f974af7F8E46326f9F7cF2cee) |
+| `TokenGateway` | [`0xf85a6D74eE7F57C068597f78b250a3657640ecA1`](https://sepolia-optimism.etherscan.io/address/0xf85a6D74eE7F57C068597f78b250a3657640ecA1) |
 | `TokenFaucet` | [`0x6Ced0D49EBfe3dee51ccBE744464d18cbf549Ef1`](https://sepolia-optimism.etherscan.io/address/0x6Ced0D49EBfe3dee51ccBE744464d18cbf549Ef1) |
 | `FeeToken (USD.h)` | [`0x088f5218efbDfC73992b0906c5d35572DB2db845`](https://sepolia-optimism.etherscan.io/address/0x088f5218efbDfC73992b0906c5d35572DB2db845) |
 
@@ -46,7 +46,7 @@ The current testnet environment for the Hyperbridge network.
 |:------------|:-----|
 | `HandlerV1` | [`0x146662aF74f7332Ef3D91826B2F6DaCBf4459dB4`](https://sepolia.basescan.org/address/0x146662aF74f7332Ef3D91826B2F6DaCBf4459dB4) |
 | `PingModule` | [`0x42C6551d05eA47c46Fc7B01BBaaD37c466481361`](https://sepolia.basescan.org/address/0x42C6551d05eA47c46Fc7B01BBaaD37c466481361) |
-| `TokenGateway` | [`0x43B220ae10D0378f974af7F8E46326f9F7cF2cee`](https://sepolia.basescan.org/address/0x43B220ae10D0378f974af7F8E46326f9F7cF2cee) |
+| `TokenGateway` | [`0xf85a6D74eE7F57C068597f78b250a3657640ecA1`](https://sepolia.basescan.org/address/0xf85a6D74eE7F57C068597f78b250a3657640ecA1) |
 | `TokenFaucet` | [`0x6Ced0D49EBfe3dee51ccBE744464d18cbf549Ef1`](https://sepolia.basescan.org/address/0x6Ced0D49EBfe3dee51ccBE744464d18cbf549Ef1) |
 | `FeeToken (USD.h)` | [`0x088f5218efbDfC73992b0906c5d35572DB2db845`](https://sepolia.basescan.org/address/0x088f5218efbDfC73992b0906c5d35572DB2db845) |
 
@@ -57,10 +57,22 @@ The current testnet environment for the Hyperbridge network.
 |:------------|:-----|
 | `HandlerV1` | [`0x648e59B610630D06cdf5eBCb775b2d33f6BAbBb0`](https://testnet.bscscan.com/address/0x648e59B610630D06cdf5eBCb775b2d33f6BAbBb0) |
 | `PingModule` | [`0x42C6551d05eA47c46Fc7B01BBaaD37c466481361`](https://testnet.bscscan.com/address/0x42C6551d05eA47c46Fc7B01BBaaD37c466481361) |
-| `TokenGateway` | [`0x43B220ae10D0378f974af7F8E46326f9F7cF2cee`](https://testnet.bscscan.com/address/0x43B220ae10D0378f974af7F8E46326f9F7cF2cee) |
+| `TokenGateway` | [`0xf85a6D74eE7F57C068597f78b250a3657640ecA1`](https://testnet.bscscan.com/address/0xf85a6D74eE7F57C068597f78b250a3657640ecA1) |
 | `TokenFaucet` | [`0x6Ced0D49EBfe3dee51ccBE744464d18cbf549Ef1`](https://testnet.bscscan.com/address/0x6Ced0D49EBfe3dee51ccBE744464d18cbf549Ef1) |
 | `FeeToken (USD.h)` | [`0x088f5218efbDfC73992b0906c5d35572DB2db845`](https://testnet.bscscan.com/address/0x088f5218efbDfC73992b0906c5d35572DB2db845) |
 
+
+### Gnosis Chiado
+
+
+| `IsmpHost` | [`0x11EB87c745D97a4Fa8Aec805359837459d240d1b`](https://gnosis-chiado.blockscout.com/address/0x11EB87c745D97a4Fa8Aec805359837459d240d1b) |
+|:------------|:-----|
+| `HandlerV1` | [`0xc4029227067b4a9bBE93DA618483355708c34067`](https://gnosis-chiado.blockscout.com/address/0xc4029227067b4a9bBE93DA618483355708c34067) |
+| `PingModule` | [`0x42C6551d05eA47c46Fc7B01BBaaD37c466481361`](https://gnosis-chiado.blockscout.com/address/0x42C6551d05eA47c46Fc7B01BBaaD37c466481361) |
+| `TokenGateway` | [`0xf85a6D74eE7F57C068597f78b250a3657640ecA1`](https://gnosis-chiado.blockscout.com/address/0xf85a6D74eE7F57C068597f78b250a3657640ecA1) |
+| `TokenFaucet` | [`0xE2FC77763630ED77E81F3038A983075460319142`](https://gnosis-chiado.blockscout.com/address/0xE2FC77763630ED77E81F3038A983075460319142) |
+| `FeeToken (USD.h)` | [`0xD3dBb48A798E7A7443EBb3A3934E18b439dDd241`](https://gnosis-chiado.blockscout.com/address/0xD3dBb48A798E7A7443EBb3A3934E18b439dDd241) |
+
 ## Gargantua V2 (Paseo) (Deprecated)
 
 Deprecated testnet environment for Gargantua V2 (Paseo).

diff --git a/evm/examples/PingModule.sol b/evm/examples/PingModule.sol
@@ -8,8 +8,8 @@ import "@polytope-labs/ismp-solidity/IIsmpHost.sol";
 import "@polytope-labs/ismp-solidity/StateMachine.sol";
 import "@polytope-labs/ismp-solidity/Message.sol";
 import "@polytope-labs/ismp-solidity/IDispatcher.sol";
-import {IERC20} from "openzeppelin/token/ERC20/IERC20.sol";
-import {StorageValue} from "@polytope-labs/solidity-merkle-trees/Types.sol";
+import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
+import {StorageValue} from "@polytope-labs/solidity-merkle-trees/src/Types.sol";
 
 struct PingMessage {
     bytes dest;
@@ -103,7 +103,7 @@ contract PingModule is IIsmpModule {
     function dispatch(PostRequest memory request) public returns (bytes32) {
         uint256 perByteFee = IIsmpHost(_host).perByteFee();
         address feeToken = IIsmpHost(_host).feeToken();
-        uint256 length = 32 >  request.body.length ? 32 : request.body.length;
+        uint256 length = 32 > request.body.length ? 32 : request.body.length;
         uint256 fee = perByteFee * length;
 
         IERC20(feeToken).transferFrom(msg.sender, address(this), fee);

diff --git a/evm/foundry.toml b/evm/foundry.toml
@@ -13,6 +13,7 @@ arbitrum-sepolia = "${ARBITRUM_SEPOLIA_RPC_URL}"
 base-sepolia = "${BASE_SEPOLIA_RPC_URL}"
 polygon-mumbai = "${POLYGON_MUMBAI_RPC_URL}"
 bsc-testnet = "${BSC_TESTNET_RPC_URL}"
+chiado = "${CHIADO_RPC_URL}"
 
 [etherscan]
 # testnet
@@ -22,5 +23,6 @@ arbitrum-sepolia = { key = "${ARBITRUM_ETHERSCAN_API_KEY}", chain = 421614, url
 base-sepolia = { key = "${BASE_ETHERSCAN_API_KEY}", chain = 84532, url = "https://api-sepolia.basescan.org/api" }
 polygon-mumbai = { key = "${POLYGON_ETHERSCAN_API_KEY}", chain = 80001, url = "https://api-testnet.polygonscan.com/api" }
 bsc-testnet = { key = "${BSC_ETHERSCAN_API_KEY}", chain = 97, url = "https://api-testnet.bscscan.com/api" }
+chiado = { key = "${GNOSIS_BLOCKSCOUT_API_KEY}", chain = 10200, url = "https://gnosis-chiado.blockscout.com/api" }
 
 # mainnet
diff --git a/evm/package.json b/evm/package.json
@@ -14,9 +14,9 @@
 	"license": "ISC",
 	"description": "",
 	"dependencies": {
-		"@polytope-labs/erc6160": "^0.3.0",
-		"@polytope-labs/ismp-solidity": "^0.5.1",
-		"@polytope-labs/solidity-merkle-trees": "^0.2.3",
+		"@polytope-labs/erc6160": "^0.3.1",
+		"@polytope-labs/ismp-solidity": "^0.6.8",
+		"@polytope-labs/solidity-merkle-trees": "^0.3.4",
 		"@uniswap/v2-periphery": "^1.1.0-beta.0",
 		"openzeppelin-solidity": "4.8.1",
 		"prettier": "^3.3.3",

diff --git a/evm/remappings.txt b/evm/remappings.txt
@@ -1,6 +1,6 @@
 @polytope-labs/ismp-solidity/=node_modules/@polytope-labs/ismp-solidity/interfaces/
-openzeppelin/=node_modules/openzeppelin-solidity/contracts/
-@polytope-labs/solidity-merkle-trees/=node_modules/@polytope-labs/solidity-merkle-trees/src/
+@openzeppelin/=node_modules/openzeppelin-solidity
+@polytope-labs/solidity-merkle-trees/=node_modules/@polytope-labs/solidity-merkle-trees/
 @polytope-labs/erc6160/=node_modules/@polytope-labs/erc6160/src/
 @uniswap/v2-periphery/=node_modules/@uniswap/v2-periphery
 stringutils/=lib/solidity-stringutils/src/
diff --git a/evm/script/BaseScript.sol b/evm/script/BaseScript.sol
@@ -11,6 +11,7 @@ abstract contract BaseScript is Script {
     address payable internal OP_SEPOLIA_HOST = payable(vm.envAddress("OP_SEPOLIA_HOST"));
     address payable internal BASE_SEPOLIA_HOST = payable(vm.envAddress("BASE_SEPOLIA_HOST"));
     address payable internal BSC_TESTNET_HOST = payable(vm.envAddress("BSC_TESTNET_HOST"));
+    address payable internal CHIADO_HOST = payable(vm.envAddress("CHIADO_HOST"));
     address payable internal FEE_TOKEN = payable(vm.envAddress("FEE_TOKEN"));
 
     /**

diff --git a/evm/script/DeployGateway.s.sol b/evm/script/DeployGateway.s.sol
@@ -8,6 +8,7 @@ import {TokenGateway, Asset, TokenGatewayParamsExt, TokenGatewayParams, AssetMet
 import {TokenFaucet} from "../src/modules/TokenFaucet.sol";
 import {CrossChainMessenger} from "../examples/CrossChainMessenger.sol";
 import {BaseScript} from "./BaseScript.sol";
+import {IIsmpHost} from "@polytope-labs/ismp-solidity/IIsmpHost.sol";
 
 contract DeployScript is BaseScript {
     bytes32 public constant MINTER_ROLE = keccak256("MINTER ROLE");
@@ -35,6 +36,9 @@ contract DeployScript is BaseScript {
         } else if (equal(host, "bsc-testnet")) {
             vm.startBroadcast(uint256(privateKey));
             deployGateway(BSC_TESTNET_HOST, admin, callDispatcher);
+        } else if (equal(host, "chiado")) {
+            vm.startBroadcast(uint256(privateKey));
+            deployGateway(CHIADO_HOST, admin, callDispatcher);
         }
     }
 
@@ -44,7 +48,7 @@ contract DeployScript is BaseScript {
     }
 
     function deployGateway(address host, address admin, address callDispatcher) public {
-        IERC6160Ext20 feeToken = IERC6160Ext20(FEE_TOKEN);
+        IERC6160Ext20 feeToken = IERC6160Ext20(IIsmpHost(host).feeToken());
 
         TokenGateway gateway = new TokenGateway{salt: salt}(admin);
         feeToken.grantRole(MINTER_ROLE, address(gateway));

diff --git a/evm/script/DeployHostUpdates.s.sol b/evm/script/DeployHostUpdates.s.sol
@@ -2,7 +2,7 @@
 pragma solidity ^0.8.13;
 
 import "forge-std/Script.sol";
-import "openzeppelin/utils/Strings.sol";
+import "@openzeppelin/contracts/utils/Strings.sol";
 import "stringutils/strings.sol";
 
 import {EvmHost, HostParams} from "../src/hosts/EvmHost.sol";

diff --git a/evm/script/DeployIsmp.s.sol b/evm/script/DeployIsmp.s.sol
@@ -13,6 +13,7 @@ import "../src/hosts/Ethereum.sol";
 import "../src/hosts/Arbitrum.sol";
 import "../src/hosts/Optimism.sol";
 import "../src/hosts/Base.sol";
+import "../src/hosts/Gnosis.sol";
 
 import {ERC6160Ext20} from "@polytope-labs/erc6160/tokens/ERC6160Ext20.sol";
 import {TokenGateway, Asset, TokenGatewayParamsExt, TokenGatewayParams, AssetMetadata} from "../src/modules/TokenGateway.sol";
@@ -114,6 +115,9 @@ contract DeployScript is BaseScript {
         } else if (host.toSlice().startsWith("polygon".toSlice())) {
             PolygonHost h = new PolygonHost{salt: salt}(params);
             return address(h);
+        } else if (host.toSlice().startsWith("chiado".toSlice())) {
+            GnosisHost h = new GnosisHost{salt: salt}(params);
+            return address(h);
         }
 
         revert("Unknown host");

diff --git a/evm/script/batchDeploy.sh b/evm/script/batchDeploy.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-declare -a arr=("sepolia" "arbitrum-sepolia" "optimism-sepolia" "base-sepolia" "bsc-testnet")
+declare -a arr=("sepolia" "arbitrum-sepolia" "optimism-sepolia" "base-sepolia" "bsc-testnet" "chiado")
 
 for i in "${arr[@]}"
 do

diff --git a/evm/src/consensus/BeefyV1.sol b/evm/src/consensus/BeefyV1.sol
@@ -18,15 +18,15 @@ import "./Codec.sol";
 import "@polytope-labs/ismp-solidity/StateMachine.sol";
 import "@polytope-labs/ismp-solidity/IConsensusClient.sol";
 
-import {MerkleMultiProof} from "@polytope-labs/solidity-merkle-trees/MerkleMultiProof.sol";
-import {MerkleMountainRange} from "@polytope-labs/solidity-merkle-trees/MerkleMountainRange.sol";
-import {MerklePatricia} from "@polytope-labs/solidity-merkle-trees/MerklePatricia.sol";
-import {StorageValue, MmrLeaf} from "@polytope-labs/solidity-merkle-trees/Types.sol";
-import {ScaleCodec} from "@polytope-labs/solidity-merkle-trees/trie/substrate/ScaleCodec.sol";
-import {Bytes} from "@polytope-labs/solidity-merkle-trees/trie/Bytes.sol";
-
-import {ECDSA} from "openzeppelin/utils/cryptography/ECDSA.sol";
-import {ERC165} from "openzeppelin/utils/introspection/ERC165.sol";
+import {MerkleMultiProof} from "@polytope-labs/solidity-merkle-trees/src/MerkleMultiProof.sol";
+import {MerkleMountainRange} from "@polytope-labs/solidity-merkle-trees/src/MerkleMountainRange.sol";
+import {MerklePatricia} from "@polytope-labs/solidity-merkle-trees/src/MerklePatricia.sol";
+import {StorageValue, MmrLeaf} from "@polytope-labs/solidity-merkle-trees/src/Types.sol";
+import {ScaleCodec} from "@polytope-labs/solidity-merkle-trees/src/trie/substrate/ScaleCodec.sol";
+import {Bytes} from "@polytope-labs/solidity-merkle-trees/src/trie/Bytes.sol";
+
+import {ECDSA} from "@openzeppelin/contracts/utils/cryptography/ECDSA.sol";
+import {ERC165} from "@openzeppelin/contracts/utils/introspection/ERC165.sol";
 
 struct Vote {
     // secp256k1 signature from a member of the authority set

diff --git a/evm/src/consensus/Codec.sol b/evm/src/consensus/Codec.sol
@@ -14,9 +14,9 @@
 // limitations under the License.
 pragma solidity 0.8.17;
 
-import "@polytope-labs/solidity-merkle-trees/MerkleMultiProof.sol";
-import "@polytope-labs/solidity-merkle-trees/trie/substrate/ScaleCodec.sol";
-import "@polytope-labs/solidity-merkle-trees/trie/Bytes.sol";
+import "@polytope-labs/solidity-merkle-trees/src/MerkleMultiProof.sol";
+import "@polytope-labs/solidity-merkle-trees/src/trie/substrate/ScaleCodec.sol";
+import "@polytope-labs/solidity-merkle-trees/src/trie/Bytes.sol";
 import "./Header.sol";
 
 struct Payload {

diff --git a/evm/src/consensus/Header.sol b/evm/src/consensus/Header.sol
@@ -15,8 +15,8 @@
 pragma solidity 0.8.17;
 
 import {StateCommitment} from "@polytope-labs/ismp-solidity/IConsensusClient.sol";
-import "@polytope-labs/solidity-merkle-trees/trie/Bytes.sol";
-import "@polytope-labs/solidity-merkle-trees/trie/substrate/ScaleCodec.sol";
+import "@polytope-labs/solidity-merkle-trees/src/trie/Bytes.sol";
+import "@polytope-labs/solidity-merkle-trees/src/trie/substrate/ScaleCodec.sol";
 
 struct DigestItem {
     bytes4 consensusId;

diff --git a/evm/src/consensus/UltraPlonkBeefy.sol b/evm/src/consensus/UltraPlonkBeefy.sol
@@ -17,14 +17,14 @@ pragma solidity 0.8.17;
 import "@polytope-labs/ismp-solidity/StateMachine.sol";
 import "@polytope-labs/ismp-solidity/IConsensusClient.sol";
 
-import "@polytope-labs/solidity-merkle-trees/MerkleMultiProof.sol";
-import "@polytope-labs/solidity-merkle-trees/MerkleMountainRange.sol";
-import "@polytope-labs/solidity-merkle-trees/trie/substrate/ScaleCodec.sol";
-import "@polytope-labs/solidity-merkle-trees/trie/Bytes.sol";
+import "@polytope-labs/solidity-merkle-trees/src/MerkleMultiProof.sol";
+import "@polytope-labs/solidity-merkle-trees/src/MerkleMountainRange.sol";
+import "@polytope-labs/solidity-merkle-trees/src/trie/substrate/ScaleCodec.sol";
+import "@polytope-labs/solidity-merkle-trees/src/trie/Bytes.sol";
 import "./verifiers/IVerifier.sol";
 import "./Codec.sol";
 
-import {ERC165} from "openzeppelin/utils/introspection/ERC165.sol";
+import {ERC165} from "@openzeppelin/contracts/utils/introspection/ERC165.sol";
 
 struct UltraPlonkConsensusProof {
     // Commitment message

diff --git a/evm/src/hosts/EvmHost.sol b/evm/src/hosts/EvmHost.sol
@@ -14,11 +14,11 @@
 // limitations under the License.
 pragma solidity 0.8.17;
 
-import {Context} from "openzeppelin/utils/Context.sol";
-import {Strings} from "openzeppelin/utils/Strings.sol";
-import {IERC20} from "openzeppelin/token/ERC20/IERC20.sol";
-import {SafeERC20} from "openzeppelin/token/ERC20/utils/SafeERC20.sol";
-import {IERC165} from "openzeppelin/utils/introspection/IERC165.sol";
+import {Context} from "@openzeppelin/contracts/utils/Context.sol";
+import {Strings} from "@openzeppelin/contracts/utils/Strings.sol";
+import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
+import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
+import {IERC165} from "@openzeppelin/contracts/utils/introspection/IERC165.sol";
 
 import {IIsmpModule, IncomingPostRequest, IncomingPostResponse, IncomingGetResponse} from "@polytope-labs/ismp-solidity/IIsmpModule.sol";
 import {DispatchPost, DispatchPostResponse, DispatchGet} from "@polytope-labs/ismp-solidity/IDispatcher.sol";

diff --git a/evm/src/hosts/Gnosis.sol b/evm/src/hosts/Gnosis.sol
@@ -0,0 +1,35 @@
+// Copyright (C) Polytope Labs Ltd.
+// SPDX-License-Identifier: Apache-2.0
+
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 	http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+pragma solidity 0.8.17;
+
+import {EvmHost, HostParams} from "./EvmHost.sol";
+
+/**
+ * @title The GnosisHost
+ * @author Polytope Labs ([email protected])
+ *
+ * @notice The IsmpHost and IsmpDispatcher implementation for the Gnosis state machine.
+ * Refer to the official ISMP specification. https://docs.hyperbridge.network/protocol/ismp
+ */
+contract GnosisHost is EvmHost {
+    constructor(HostParams memory params) EvmHost(params) {}
+
+    /// chainId for the Gnosis mainnet
+    uint256 public constant CHAIN_ID = 100;
+
+    function chainId() public pure override returns (uint256) {
+        return CHAIN_ID;
+    }
+}
diff --git a/evm/src/modules/HandlerV1.sol b/evm/src/modules/HandlerV1.sol
@@ -14,32 +14,17 @@
 // limitations under the License.
 pragma solidity 0.8.17;
 
-import {MerkleMountainRange, MmrLeaf} from "@polytope-labs/solidity-merkle-trees/MerkleMountainRange.sol";
-import {MerklePatricia, StorageValue} from "@polytope-labs/solidity-merkle-trees/MerklePatricia.sol";
-import {Bytes} from "@polytope-labs/solidity-merkle-trees/trie/Bytes.sol";
+import {MerkleMountainRange, MmrLeaf} from "@polytope-labs/solidity-merkle-trees/src/MerkleMountainRange.sol";
+import {MerklePatricia, StorageValue} from "@polytope-labs/solidity-merkle-trees/src/MerklePatricia.sol";
+import {Bytes} from "@polytope-labs/solidity-merkle-trees/src/trie/Bytes.sol";
 
 import {IConsensusClient, IntermediateState, StateMachineHeight, StateCommitment} from "@polytope-labs/ismp-solidity/IConsensusClient.sol";
 import {IIsmpHost, FeeMetadata, FrozenStatus} from "@polytope-labs/ismp-solidity/IIsmpHost.sol";
 import {IHandler} from "@polytope-labs/ismp-solidity/IHandler.sol";
-import {
-    Message,
-    PostResponse,
-    PostRequest,
-    GetRequest,
-    GetResponse,
-    PostRequestMessage,
-    PostResponseMessage,
-    GetResponseMessage,
-    PostRequestTimeoutMessage,
-    PostResponseTimeoutMessage,
-    GetTimeoutMessage,
-    PostRequestLeaf,
-    PostResponseLeaf,
-    GetResponseLeaf
-} from "@polytope-labs/ismp-solidity/Message.sol";
-
-import {Context} from "openzeppelin/utils/Context.sol";
-import {ERC165} from "openzeppelin/utils/introspection/ERC165.sol";
+import {Message, PostResponse, PostRequest, GetRequest, GetResponse, PostRequestMessage, PostResponseMessage, GetResponseMessage, PostRequestTimeoutMessage, PostResponseTimeoutMessage, GetTimeoutMessage, PostRequestLeaf, PostResponseLeaf, GetResponseLeaf} from "@polytope-labs/ismp-solidity/Message.sol";
+
+import {Context} from "@openzeppelin/contracts/utils/Context.sol";
+import {ERC165} from "@openzeppelin/contracts/utils/introspection/ERC165.sol";
 
 // Storage prefix for request receipts in the pallet-ismp child trie
 bytes constant REQUEST_RECEIPTS_STORAGE_PREFIX = hex"526571756573745265636569707473";