diff --git a/packages/thirdweb/src/contract/actions/compiler-metadata.ts b/packages/thirdweb/src/contract/actions/compiler-metadata.ts
index 001190913cd..6c5a16cae80 100644
--- a/packages/thirdweb/src/contract/actions/compiler-metadata.ts
+++ b/packages/thirdweb/src/contract/actions/compiler-metadata.ts
@@ -37,7 +37,7 @@ export function formatCompilerMetadata(metadata: any): PublishedMetadata {
   ];
   return {
     name,
-    abi: metadata.output.abi,
+    abi: metadata?.output?.abi || [],
     metadata,
     info,
     licenses,
diff --git a/packages/thirdweb/src/contract/actions/get-bytecode.ts b/packages/thirdweb/src/contract/actions/get-bytecode.ts
index ee6757db639..34b58c14e15 100644
--- a/packages/thirdweb/src/contract/actions/get-bytecode.ts
+++ b/packages/thirdweb/src/contract/actions/get-bytecode.ts
@@ -11,11 +11,11 @@ const BYTECODE_CACHE = new WeakMap<ThirdwebContract<Abi>, Promise<Hex>>();
  * @returns A Promise that resolves to the bytecode of the contract.
  * @example
  * ```ts
- * import { getByteCode } from "thirdweb/contract";
- * const bytecode = await getByteCode(contract);
+ * import { getBytecode } from "thirdweb/contract";
+ * const bytecode = await getBytecode(contract);
  * ```
  */
-export function getByteCode<abi extends Abi>(
+export function getBytecode<abi extends Abi>(
   contract: ThirdwebContract<abi>,
 ): Promise<Hex> {
   if (BYTECODE_CACHE.has(contract)) {
diff --git a/packages/thirdweb/src/contract/actions/resolve-abi.ts b/packages/thirdweb/src/contract/actions/resolve-abi.ts
index 418e292903c..9d5d0edb81c 100644
--- a/packages/thirdweb/src/contract/actions/resolve-abi.ts
+++ b/packages/thirdweb/src/contract/actions/resolve-abi.ts
@@ -2,7 +2,7 @@ import { formatAbi, type Abi, parseAbi } from "abitype";
 import type { ThirdwebContract } from "../index.js";
 import { getChainIdFromChain } from "../../chain/index.js";
 import { getClientFetch } from "../../utils/fetch.js";
-import { getByteCode } from "./get-bytecode.js";
+import { getBytecode } from "./get-bytecode.js";
 import { download } from "../../storage/download.js";
 import { extractIPFSUri } from "../../utils/bytecode/extractIPFS.js";
 import { detectMethodInBytecode } from "../../utils/bytecode/detectExtension.js";
@@ -106,15 +106,21 @@ export async function resolveAbiFromContractApi(
 export async function resolveAbiFromBytecode(
   contract: ThirdwebContract<any>,
 ): Promise<Abi> {
-  const bytecode = await getByteCode(contract);
+  const bytecode = await getBytecode(contract);
   const ipfsUri = extractIPFSUri(bytecode);
   if (!ipfsUri) {
-    throw new Error("No IPFS URI found in bytecode");
+    // just early exit if we can't find an IPFS URI
+    return [];
+  }
+  try {
+    const res = await download({ uri: ipfsUri, client: contract.client });
+    const json = await res.json();
+    // ABI is at `json.output.abi`
+    return json.output.abi;
+  } catch {
+    // if we can't resolve the ABI from the IPFS URI, return an empty array
+    return [];
   }
-  const res = await download({ uri: ipfsUri, client: contract.client });
-  const json = await res.json();
-  // ABI is at `json.output.abi`
-  return json.output.abi;
 }
 
 const PLUGINS_ABI = {
@@ -252,7 +258,7 @@ export async function resolveCompositeAbiFromBytecode(
 ) {
   const [rootAbi, bytecode] = await Promise.all([
     resolveAbiFromBytecode(contract),
-    getByteCode(contract),
+    getBytecode(contract),
   ]);
 
   // check if contract is plugin-pattern / dynamic
diff --git a/packages/thirdweb/src/contract/index.ts b/packages/thirdweb/src/contract/index.ts
index c737daadb17..a5dee929c52 100644
--- a/packages/thirdweb/src/contract/index.ts
+++ b/packages/thirdweb/src/contract/index.ts
@@ -13,7 +13,7 @@ export {
 
 export { formatCompilerMetadata } from "./actions/compiler-metadata.js";
 
-export { getByteCode } from "./actions/get-bytecode.js";
+export { getBytecode } from "./actions/get-bytecode.js";
 
 // verification
 export {
diff --git a/packages/thirdweb/src/contract/verification/index.ts b/packages/thirdweb/src/contract/verification/index.ts
index ce8b7dd352c..0e4f4885163 100644
--- a/packages/thirdweb/src/contract/verification/index.ts
+++ b/packages/thirdweb/src/contract/verification/index.ts
@@ -109,7 +109,7 @@ export async function verifyContract(
   const encodedArgs = options.encodedConstructorArgs
     ? options.encodedConstructorArgs
     : await fetchConstructorParams({
-        abi: compilerMetadata.metadata.output.abi,
+        abi: compilerMetadata?.metadata?.output?.abi || [],
         contract: options.contract,
         explorerApiUrl: options.explorerApiUrl,
         explorerApiKey: options.explorerApiKey,
diff --git a/packages/thirdweb/src/storage/download.ts b/packages/thirdweb/src/storage/download.ts
index 5818081f552..54e11ab0e02 100644
--- a/packages/thirdweb/src/storage/download.ts
+++ b/packages/thirdweb/src/storage/download.ts
@@ -27,7 +27,11 @@ export async function download(options: DownloadOptions) {
     options.requestTimeoutMs,
   );
 
-  return getClientFetch(options.client)(resolveScheme(options), {
+  const res = await getClientFetch(options.client)(resolveScheme(options), {
     requestTimeoutMs,
   });
+  if (!res.ok) {
+    throw new Error(`Failed to download file: ${res.statusText}`);
+  }
+  return res;
 }
diff --git a/packages/thirdweb/src/utils/any-evm/is-eip155-enforced.test.ts b/packages/thirdweb/src/utils/any-evm/is-eip155-enforced.test.ts
new file mode 100644
index 00000000000..04d745655e1
--- /dev/null
+++ b/packages/thirdweb/src/utils/any-evm/is-eip155-enforced.test.ts
@@ -0,0 +1,29 @@
+import { describe, it, expect } from "vitest";
+import { isEIP155Enforced } from "./is-eip155-enforced.js";
+import { TEST_CLIENT } from "../../../test/src/test-clients.js";
+
+describe("isEIP155Enforced", () => {
+  it("should return true if EIP-155 is enforced", async () => {
+    // Call the isEIP155Enforced function with a chain that enforces EIP-155
+    const result = await isEIP155Enforced({
+      // optimism enforce eip155
+      chain: 10,
+      client: TEST_CLIENT,
+    });
+
+    // Assert that the result is true
+    expect(result).toBe(true);
+  });
+
+  it("should return false if EIP-155 is not enforced", async () => {
+    // Call the isEIP155Enforced function with a chain that does not enforce EIP-155
+    const result = await isEIP155Enforced({
+      // ethereum does not enforce eip155
+      chain: 1,
+      client: TEST_CLIENT,
+    });
+
+    // Assert that the result is false
+    expect(result).toBe(false);
+  });
+});
diff --git a/packages/thirdweb/src/utils/any-evm/is-eip155-enforced.ts b/packages/thirdweb/src/utils/any-evm/is-eip155-enforced.ts
index 59360b48277..ec54818857a 100644
--- a/packages/thirdweb/src/utils/any-evm/is-eip155-enforced.ts
+++ b/packages/thirdweb/src/utils/any-evm/is-eip155-enforced.ts
@@ -1,8 +1,13 @@
-import type { Chain } from "../../chain/index.js";
+import { getChainIdFromChain, type Chain } from "../../chain/index.js";
 import type { ThirdwebClient } from "../../client/client.js";
 import { eth_sendRawTransaction } from "../../rpc/index.js";
 import { getRpcClient } from "../../rpc/rpc.js";
 
+// it's OK to cache this forever because:
+// 1. the results can't change
+// 2. the total size can be max <number of chains> * boolean
+const EIP_ENFORCED_CACHE = new Map<bigint, boolean>();
+
 type IsEIP155EnforcedOptions = {
   chain: Chain;
   client: ThirdwebClient;
@@ -22,6 +27,12 @@ type IsEIP155EnforcedOptions = {
 export async function isEIP155Enforced(
   options: IsEIP155EnforcedOptions,
 ): Promise<boolean> {
+  const chainId = getChainIdFromChain(options.chain);
+  // cache because the result cannot change
+  if (EIP_ENFORCED_CACHE.has(chainId)) {
+    return EIP_ENFORCED_CACHE.get(chainId) as boolean;
+  }
+  let result = false;
   try {
     // TODO: Find a better way to check this.
 
@@ -37,11 +48,11 @@ export async function isEIP155Enforced(
     const errorJson = JSON.stringify(e).toLowerCase();
 
     if (matchError(errorMsg) || matchError(errorJson)) {
-      return true;
+      result = true;
     }
-    return false;
   }
-  return false;
+  EIP_ENFORCED_CACHE.set(chainId, result);
+  return result;
 }
 
 const ERROR_SUBSTRINGS_COMPOSITE = [
diff --git a/packages/thirdweb/src/utils/any-evm/keccack-id.bench.ts b/packages/thirdweb/src/utils/any-evm/keccack-id.bench.ts
new file mode 100644
index 00000000000..5f9f128f2f6
--- /dev/null
+++ b/packages/thirdweb/src/utils/any-evm/keccack-id.bench.ts
@@ -0,0 +1,13 @@
+import { describe, bench } from "vitest";
+import { keccackId } from "./keccack-id.js";
+import { id } from "ethers6";
+
+const input = "Hello, World!";
+describe("keccackId", () => {
+  bench("thirdweb", () => {
+    keccackId(input);
+  });
+  bench("ethers", () => {
+    id(input);
+  });
+});
diff --git a/packages/thirdweb/src/utils/any-evm/keccack-id.test.ts b/packages/thirdweb/src/utils/any-evm/keccack-id.test.ts
new file mode 100644
index 00000000000..83c9f23d88b
--- /dev/null
+++ b/packages/thirdweb/src/utils/any-evm/keccack-id.test.ts
@@ -0,0 +1,12 @@
+import { describe, it, expect } from "vitest";
+import { keccackId } from "./keccack-id.js";
+
+describe("keccackId", () => {
+  it("should return the keccak256 hash of the input", () => {
+    const input = "Hello, World!";
+    const result = keccackId(input);
+    expect(result).toMatchInlineSnapshot(
+      `"0xacaf3289d7b601cbd114fb36c4d29c85bbfd5e133f14cb355c3fd8d99367964f"`,
+    );
+  });
+});
diff --git a/packages/thirdweb/src/utils/any-evm/keccack-id.ts b/packages/thirdweb/src/utils/any-evm/keccack-id.ts
index 741c63199f5..be8a1754548 100644
--- a/packages/thirdweb/src/utils/any-evm/keccack-id.ts
+++ b/packages/thirdweb/src/utils/any-evm/keccack-id.ts
@@ -1,4 +1,4 @@
-import { keccak256, toBytes, type Hex } from "viem";
+import { keccak256, type Hex, stringToBytes } from "viem";
 
 /**
  * Calculates the keccak ID of the given input.
@@ -10,6 +10,6 @@ import { keccak256, toBytes, type Hex } from "viem";
  * const keccakId = keccackId(input);
  * ```
  */
-export function keccackId(input: string | number | bigint | boolean): Hex {
-  return keccak256(toBytes(input));
+export function keccackId(input: string): Hex {
+  return keccak256(stringToBytes(input));
 }
diff --git a/packages/thirdweb/src/utils/bytecode/detectExtension.ts b/packages/thirdweb/src/utils/bytecode/detectExtension.ts
index 079a56c4c3b..c91a01bda13 100644
--- a/packages/thirdweb/src/utils/bytecode/detectExtension.ts
+++ b/packages/thirdweb/src/utils/bytecode/detectExtension.ts
@@ -2,7 +2,7 @@ import type { AbiFunction } from "abitype";
 
 import { getFunctionSelector } from "../../abi/lib/getFunctionSelector.js";
 import { type ThirdwebContract } from "../../contract/contract.js";
-import { getByteCode } from "../../contract/actions/get-bytecode.js";
+import { getBytecode } from "../../contract/actions/get-bytecode.js";
 
 export type DetectExtensionOptions = {
   contract: ThirdwebContract;
@@ -25,7 +25,7 @@ export type DetectExtensionOptions = {
 export async function detectMethod(
   options: DetectExtensionOptions,
 ): Promise<boolean> {
-  const bytecode = await getByteCode(options.contract);
+  const bytecode = await getBytecode(options.contract);
   return detectMethodInBytecode({ bytecode, method: options.method });
 }
 
diff --git a/packages/thirdweb/src/utils/bytecode/extractIPFS.test.ts b/packages/thirdweb/src/utils/bytecode/extractIPFS.test.ts
index c9cfb9e5bc1..76454eb4488 100644
--- a/packages/thirdweb/src/utils/bytecode/extractIPFS.test.ts
+++ b/packages/thirdweb/src/utils/bytecode/extractIPFS.test.ts
@@ -1,5 +1,5 @@
 import { describe, it, expect } from "vitest";
-import { getByteCode } from "../../contract/index.js";
+import { getBytecode } from "../../contract/index.js";
 import {
   DOODLES_CONTRACT,
   USDC_CONTRACT,
@@ -9,7 +9,7 @@ import { extractIPFSUri } from "./extractIPFS.js";
 describe("extractIPFSUri", () => {
   it("works if ipfs is there", async () => {
     //  get some bytecode
-    const bytecode = await getByteCode(DOODLES_CONTRACT);
+    const bytecode = await getBytecode(DOODLES_CONTRACT);
     //  extract IPFS hash
     const ipfsHash = extractIPFSUri(bytecode);
 
@@ -21,7 +21,7 @@ describe("extractIPFSUri", () => {
 
   it("does not work if ipfs is not there", async () => {
     //  get some bytecode
-    const bytecode = await getByteCode(USDC_CONTRACT);
+    const bytecode = await getBytecode(USDC_CONTRACT);
     //  extract IPFS hash
     const ipfsHash = extractIPFSUri(bytecode);
 
diff --git a/packages/thirdweb/src/utils/bytecode/is-contract-deployed.ts b/packages/thirdweb/src/utils/bytecode/is-contract-deployed.ts
index d403028cc0f..24f770138dd 100644
--- a/packages/thirdweb/src/utils/bytecode/is-contract-deployed.ts
+++ b/packages/thirdweb/src/utils/bytecode/is-contract-deployed.ts
@@ -1,5 +1,5 @@
 import type { ThirdwebContract } from "../../contract/contract.js";
-import { getByteCode } from "../../contract/actions/get-bytecode.js";
+import { getBytecode } from "../../contract/actions/get-bytecode.js";
 
 /**
  * Checks if a contract is deployed by verifying its bytecode.
@@ -18,5 +18,5 @@ import { getByteCode } from "../../contract/actions/get-bytecode.js";
 export async function isContractDeployed(
   contract: ThirdwebContract,
 ): Promise<boolean> {
-  return (await getByteCode(contract)) !== "0x";
+  return (await getBytecode(contract)) !== "0x";
 }
diff --git a/packages/thirdweb/src/utils/bytecode/resolveImplementation.ts b/packages/thirdweb/src/utils/bytecode/resolveImplementation.ts
index d907b05d0ad..0be6eaed01a 100644
--- a/packages/thirdweb/src/utils/bytecode/resolveImplementation.ts
+++ b/packages/thirdweb/src/utils/bytecode/resolveImplementation.ts
@@ -3,7 +3,7 @@ import type { ThirdwebContract } from "../../index.js";
 import { eth_getStorageAt, getRpcClient } from "../../rpc/index.js";
 import { readContractRaw } from "../../transaction/actions/raw/raw-read.js";
 import { extractMinimalProxyImplementationAddress } from "./extractMnimalProxyImplementationAddress.js";
-import { getByteCode } from "../../contract/actions/get-bytecode.js";
+import { getBytecode } from "../../contract/actions/get-bytecode.js";
 
 // TODO: move to const exports
 export const AddressZero = "0x0000000000000000000000000000000000000000";
@@ -22,7 +22,7 @@ export async function resolveImplementation(
   contract: ThirdwebContract<any>,
 ): Promise<{ address: string; bytecode: string }> {
   const [bytecode, beacon] = await Promise.all([
-    getByteCode(contract),
+    getBytecode(contract),
     getBeaconFromStorageSlot(contract),
   ]);
   // check minimal proxy first synchronously
@@ -31,7 +31,7 @@ export async function resolveImplementation(
   if (minimalProxyImplementationAddress) {
     return {
       address: minimalProxyImplementationAddress,
-      bytecode: await getByteCode({
+      bytecode: await getBytecode({
         ...contract,
         address: minimalProxyImplementationAddress,
       }),
@@ -57,7 +57,7 @@ export async function resolveImplementation(
     ) {
       return {
         address: implementationAddress,
-        bytecode: await getByteCode({
+        bytecode: await getBytecode({
           ...contract,
           address: implementationAddress,
         }),
diff --git a/packages/thirdweb/src/utils/fetch.ts b/packages/thirdweb/src/utils/fetch.ts
index 48c98161001..a4c463aea57 100644
--- a/packages/thirdweb/src/utils/fetch.ts
+++ b/packages/thirdweb/src/utils/fetch.ts
@@ -41,21 +41,18 @@ export function getClientFetch(client: ThirdwebClient) {
       });
     }
 
-    let abortController: AbortController | undefined;
+    const controller = new AbortController();
     let abortTimeout: ReturnType<typeof setTimeout> | undefined;
     if (requestTimeoutMs) {
-      abortController = new AbortController();
-      abortTimeout = setTimeout(abortController.abort, requestTimeoutMs);
+      abortTimeout = setTimeout(() => controller.abort(), requestTimeoutMs);
     }
 
     return fetch(url, {
       ...restInit,
       headers,
-      signal: abortController?.signal,
+      signal: controller?.signal,
     }).finally(() => {
-      if (abortTimeout) {
-        clearTimeout(abortTimeout);
-      }
+      clearTimeout(abortTimeout);
     });
   }
   FETCH_CACHE.set(client, fetchWithHeaders);