diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4e73c79..bb67b4c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,7 +12,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: oven-sh/setup-bun@v1
+      - uses: oven-sh/setup-bun@v2
+        with:
+          bun-version: latest
 
       - name: Install dependencies
         run: bun install
@@ -24,7 +26,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: oven-sh/setup-bun@v1
+      - uses: oven-sh/setup-bun@v2
+        with:
+          bun-version: latest
 
       - name: Install dependencies
         run: bun install
diff --git a/.github/workflows/fetch-data.yml b/.github/workflows/fetch-data.yml
index f82a2c3..19bb0dd 100644
--- a/.github/workflows/fetch-data.yml
+++ b/.github/workflows/fetch-data.yml
@@ -13,7 +13,14 @@ jobs:
       ALCHEMY_API_KEY: ${{ secrets.ALCHEMY_API_KEY }}
     steps:
       - uses: actions/checkout@v4
-      - uses: oven-sh/setup-bun@v1
+      - uses: oven-sh/setup-bun@v2
+        with:
+          bun-version: latest
+
+      - name: Print versions
+        run: |
+          bun --version
+          bun -p process.version
 
       - name: Install dependencies
         run: bun install
diff --git a/bun.lockb b/bun.lockb
index 0260b75..20e64bb 100755
Binary files a/bun.lockb and b/bun.lockb differ
diff --git a/script/archive/precompile-check.ts b/script/archive/precompile-check.ts
index 283eaa4..6dcd862 100644
--- a/script/archive/precompile-check.ts
+++ b/script/archive/precompile-check.ts
@@ -4,7 +4,7 @@
 // they are precompiles or predeploys, and prints the result.
 // Example usage:
 //   bun script/precompile-check.ts optimism
-import { http, type Address, createPublicClient, getAddress } from 'viem';
+import { http, type Address, createPublicClient, getAddress, type GetBytecodeReturnType } from 'viem';
 import { type Chain, arbitrum, optimism } from 'viem/chains';
 
 type ChainConfig = {
@@ -74,8 +74,11 @@ async function main() {
 	const transport = http(rpcUrl, { batch: true });
 	const client = createPublicClient({ chain, transport });
 
-	const promises = addresses.map((address) => client.getBytecode({ address }));
-	const codes = await Promise.all(promises);
+	const codes: GetBytecodeReturnType[] = []
+	for (const address of addresses) {
+		const code = await client.getBytecode({ address });
+		codes.push(code);
+	}
 	const kinds = codes.map((code) =>
 		code === '0x' || code === '0xfe' ? 'precompile' : 'predeploy',
 	);
diff --git a/script/checks/deployed-contracts.ts b/script/checks/deployed-contracts.ts
index 91e4f47..46d2f26 100644
--- a/script/checks/deployed-contracts.ts
+++ b/script/checks/deployed-contracts.ts
@@ -5,12 +5,13 @@ const NO_CODE_HASH = keccak256('0x');
 export async function checkDeployedContracts(
 	client: PublicClient,
 ): Promise<{ name: string; address: Address; codeHash: Hex; hasCode: boolean }[]> {
-	const result = deployedContracts.map(async ({ name, address }) => {
+	const result = [];
+	for (const { name, address } of deployedContracts) {
 		const code = await client.getBytecode({ address });
 		const codeHash = (code && keccak256(code)) || NO_CODE_HASH;
-		return { name, address, codeHash, hasCode: codeHash !== NO_CODE_HASH };
-	});
-	return await Promise.all(result);
+		result.push({ name, address, codeHash, hasCode: codeHash !== NO_CODE_HASH });
+	}
+	return result;
 }
 
 export const deployedContracts: { name: string; address: Address }[] = [
diff --git a/script/checks/evm-stack-addresses.ts b/script/checks/evm-stack-addresses.ts
index b4f0b6d..f661751 100644
--- a/script/checks/evm-stack-addresses.ts
+++ b/script/checks/evm-stack-addresses.ts
@@ -26,13 +26,13 @@ export async function checkEvmStackAddresses(
 
 	for (const stack of Object.keys(evmStackAddresses)) {
 		const stackPredploys = evmStackAddresses[stack as EVMStack];
-		const res = stackPredploys.map(async ({ name, address, kind }) => {
+		result[stack as EVMStack] = [];
+		for (const { name, address, kind } of stackPredploys) {
 			const code = await client.getBytecode({ address });
 			const codeHash = (code && keccak256(code)) || NO_CODE_HASH;
 			const exists = evmStackAddressExists(stack as EVMStack, codeHash);
-			return { name, address, kind, codeHash, exists };
-		});
-		result[stack as EVMStack] = await Promise.all(res);
+			result[stack as EVMStack].push({ name, address, kind, codeHash, exists });
+		}
 	}
 
 	return result;
diff --git a/script/checks/opcodes.ts b/script/checks/opcodes.ts
index e5f04cd..fe19718 100644
--- a/script/checks/opcodes.ts
+++ b/script/checks/opcodes.ts
@@ -1,13 +1,15 @@
 import { type Hex, type PublicClient, toHex } from 'viem';
 
 type Opcode = number;
-type CallError = { details: string };
 
 export async function checkOpcodes(
 	client: PublicClient,
 ): Promise<{ number: Hex; name: string; supported: boolean | string }[]> {
 	const opcodes = Array.from(Array(0xff + 1).keys());
-	const supported = await Promise.all(opcodes.map(async (opcode) => checkOpcode(opcode, client)));
+	const supported: Array<boolean | 'unknown'> = [];
+	for (const opcode of opcodes) {
+		supported.push(await checkOpcode(opcode, client));
+	}
 
 	const result: { number: Hex; name: string; supported: boolean | string }[] = [];
 	opcodes.forEach((opcode, index) => {
@@ -29,15 +31,34 @@ async function checkOpcode(opcode: Opcode, client: PublicClient): Promise<boolea
 	try {
 		await client.call({ data: toHex(opcode, { size: 1 }) });
 		return true; // Call succeeded so opcode is supported.
-	} catch (e: unknown) {
-		const err = e as CallError;
+	} catch (err: unknown) {
+		if (
+			typeof err !== 'object' ||
+			err === null ||
+			!('details' in err) ||
+			typeof err.details !== 'string'
+		) {
+			throw err;
+		}
 		const details = err.details.toLowerCase();
 		// TODO These might be specific to the node implementation, can this be more robust?
-		if (opcode === 0xfe && details.includes('invalid opcode: invalid')) return true; // Designated invalid opcode.
-		if (details.includes('stack underflow')) return true; // Implies opcode is supported.
+		if (
+			opcode === 0xfe &&
+			(details.includes('invalid opcode: invalid') || details.includes('invalidfeopcode'))
+		)
+			return true; // Designated invalid opcode.
+		if (
+			details.includes('stack underflow') ||
+			details.includes('stackunderflow') ||
+			details.includes('stackoverflow')
+		) {
+			return true; // Implies opcode is supported.
+		}
 		if (details.includes('not defined')) return false;
 		if (details.includes('not supported')) return false;
+		if (details.includes('notactivated')) return false;
 		if (details.includes('invalid opcode')) return false;
+		if (details.includes('opcodenotfound')) return false;
 
 		console.log(`\n======== Opcode ${opcode} ========`);
 		console.log('err.details:', err.details);
@@ -73,6 +94,7 @@ export const knownOpcodes: Record<Opcode, string> = {
 	0x1b: 'SHL',
 	0x1c: 'SHR',
 	0x1d: 'SAR',
+	0x1e: 'CLZ',
 	0x20: 'KECCAK256',
 	0x30: 'ADDRESS',
 	0x31: 'BALANCE',
diff --git a/script/checks/precompiles.ts b/script/checks/precompiles.ts
index 8350833..3b86d76 100644
--- a/script/checks/precompiles.ts
+++ b/script/checks/precompiles.ts
@@ -3,17 +3,19 @@ import type { Address, Hex, PublicClient } from 'viem';
 export async function checkPrecompiles(
 	client: PublicClient,
 ): Promise<{ name: string; address: Address; implemented: boolean }[]> {
-	const result = precompiles.map(async ({ name, address, testCalldata, expectedResponse }) => {
+	const result = [];
+
+	for (const { name, address, testCalldata, expectedResponse } of precompiles) {
 		try {
 			const res = await client.call({ to: address, data: testCalldata });
 			const implemented = res.data === expectedResponse;
-			return { name, address, implemented };
+			result.push({ name, address, implemented });
 		} catch (e) {
 			// If the call fails, the precompile is not implemented.
-			return { name, address, implemented: false };
+			result.push({ name, address, implemented: false });
 		}
-	});
-	return await Promise.all(result);
+	}
+	return result;
 }
 
 // By default a call to an EOA succeeds and returns no data, therefore we cannot simply use a
diff --git a/script/data/chain/1.json b/script/data/chain/1.json
index 7ad7e8f..f48d3fd 100644
--- a/script/data/chain/1.json
+++ b/script/data/chain/1.json
@@ -77,6 +77,7 @@
 		{ "number": "0x1b", "name": "SHL", "supported": true },
 		{ "number": "0x1c", "name": "SHR", "supported": true },
 		{ "number": "0x1d", "name": "SAR", "supported": true },
+		{ "number": "0x1e", "name": "CLZ", "supported": true },
 		{ "number": "0x20", "name": "KECCAK256", "supported": true },
 		{ "number": "0x30", "name": "ADDRESS", "supported": true },
 		{ "number": "0x31", "name": "BALANCE", "supported": true },
@@ -299,7 +300,7 @@
 		{
 			"name": "secp256r1",
 			"address": "0x0000000000000000000000000000000000000100",
-			"implemented": false
+			"implemented": true
 		}
 	],
 	"evmStackAddresses": {
diff --git a/script/data/chain/10.json b/script/data/chain/10.json
index 3314ff4..325cfca 100644
--- a/script/data/chain/10.json
+++ b/script/data/chain/10.json
@@ -63,6 +63,7 @@
 		{ "number": "0x1b", "name": "SHL", "supported": true },
 		{ "number": "0x1c", "name": "SHR", "supported": true },
 		{ "number": "0x1d", "name": "SAR", "supported": true },
+		{ "number": "0x1e", "name": "CLZ", "supported": false },
 		{ "number": "0x20", "name": "KECCAK256", "supported": true },
 		{ "number": "0x30", "name": "ADDRESS", "supported": true },
 		{ "number": "0x31", "name": "BALANCE", "supported": true },
diff --git a/script/data/chain/137.json b/script/data/chain/137.json
index 0bd2cbc..969710f 100644
--- a/script/data/chain/137.json
+++ b/script/data/chain/137.json
@@ -63,6 +63,7 @@
 		{ "number": "0x1b", "name": "SHL", "supported": true },
 		{ "number": "0x1c", "name": "SHR", "supported": true },
 		{ "number": "0x1d", "name": "SAR", "supported": true },
+		{ "number": "0x1e", "name": "CLZ", "supported": false },
 		{ "number": "0x20", "name": "KECCAK256", "supported": true },
 		{ "number": "0x30", "name": "ADDRESS", "supported": true },
 		{ "number": "0x31", "name": "BALANCE", "supported": true },
@@ -280,7 +281,7 @@
 		{
 			"name": "point evaluation",
 			"address": "0x000000000000000000000000000000000000000a",
-			"implemented": false
+			"implemented": true
 		},
 		{
 			"name": "secp256r1",
diff --git a/script/data/chain/34443.json b/script/data/chain/34443.json
index a58d412..4e36d45 100644
--- a/script/data/chain/34443.json
+++ b/script/data/chain/34443.json
@@ -13,7 +13,12 @@
 		],
 		"faucets": [],
 		"icon": "mode",
-		"rpc": ["https://mainnet.mode.network", "https://mode.drpc.org", "wss://mode.drpc.org"]
+		"rpc": [
+			"https://mainnet.mode.network",
+			"https://mode.drpc.org",
+			"wss://mode.drpc.org",
+			"https://mode-mainnet.g.alchemy.com/v2/${ALCHEMY_API_KEY}"
+		]
 	},
 	"opcodes": [
 		{ "number": "0x00", "name": "STOP", "supported": true },
@@ -42,6 +47,7 @@
 		{ "number": "0x1b", "name": "SHL", "supported": true },
 		{ "number": "0x1c", "name": "SHR", "supported": true },
 		{ "number": "0x1d", "name": "SAR", "supported": true },
+		{ "number": "0x1e", "name": "CLZ", "supported": false },
 		{ "number": "0x20", "name": "KECCAK256", "supported": true },
 		{ "number": "0x30", "name": "ADDRESS", "supported": true },
 		{ "number": "0x31", "name": "BALANCE", "supported": true },
diff --git a/script/data/chain/42161.json b/script/data/chain/42161.json
index c3e73ca..be543af 100644
--- a/script/data/chain/42161.json
+++ b/script/data/chain/42161.json
@@ -58,6 +58,7 @@
 		{ "number": "0x1b", "name": "SHL", "supported": true },
 		{ "number": "0x1c", "name": "SHR", "supported": true },
 		{ "number": "0x1d", "name": "SAR", "supported": true },
+		{ "number": "0x1e", "name": "CLZ", "supported": true },
 		{ "number": "0x20", "name": "KECCAK256", "supported": true },
 		{ "number": "0x30", "name": "ADDRESS", "supported": true },
 		{ "number": "0x31", "name": "BALANCE", "supported": true },
diff --git a/script/data/chain/43114.json b/script/data/chain/43114.json
index d743627..6d07881 100644
--- a/script/data/chain/43114.json
+++ b/script/data/chain/43114.json
@@ -21,7 +21,8 @@
 			"wss://avalanche-c-chain-rpc.publicnode.com",
 			"https://rpc.ankr.com/avalanche",
 			"https://ava-mainnet.public.blastapi.io/ext/bc/C/rpc",
-			"https://avalanche-mainnet.infura.io/v3/${INFURA_API_KEY}"
+			"https://avalanche-mainnet.infura.io/v3/${INFURA_API_KEY}",
+			"https://avax-mainnet.g.alchemy.com/v2/${ALCHEMY_API_KEY}"
 		],
 		"slip44": 9005
 	},
@@ -52,6 +53,7 @@
 		{ "number": "0x1b", "name": "SHL", "supported": true },
 		{ "number": "0x1c", "name": "SHR", "supported": true },
 		{ "number": "0x1d", "name": "SAR", "supported": true },
+		{ "number": "0x1e", "name": "CLZ", "supported": false },
 		{ "number": "0x20", "name": "KECCAK256", "supported": true },
 		{ "number": "0x30", "name": "ADDRESS", "supported": true },
 		{ "number": "0x31", "name": "BALANCE", "supported": true },
@@ -274,7 +276,7 @@
 		{
 			"name": "secp256r1",
 			"address": "0x0000000000000000000000000000000000000100",
-			"implemented": false
+			"implemented": true
 		}
 	],
 	"evmStackAddresses": {
diff --git a/script/data/chain/534352.json b/script/data/chain/534352.json
index 71ba0d6..5f29fe5 100644
--- a/script/data/chain/534352.json
+++ b/script/data/chain/534352.json
@@ -52,6 +52,7 @@
 		{ "number": "0x1b", "name": "SHL", "supported": true },
 		{ "number": "0x1c", "name": "SHR", "supported": true },
 		{ "number": "0x1d", "name": "SAR", "supported": true },
+		{ "number": "0x1e", "name": "CLZ", "supported": true },
 		{ "number": "0x20", "name": "KECCAK256", "supported": true },
 		{ "number": "0x30", "name": "ADDRESS", "supported": true },
 		{ "number": "0x31", "name": "BALANCE", "supported": true },
@@ -274,7 +275,7 @@
 		{
 			"name": "secp256r1",
 			"address": "0x0000000000000000000000000000000000000100",
-			"implemented": false
+			"implemented": true
 		}
 	],
 	"evmStackAddresses": {
diff --git a/script/data/chain/59144.json b/script/data/chain/59144.json
index 6c679d9..5d2238d 100644
--- a/script/data/chain/59144.json
+++ b/script/data/chain/59144.json
@@ -68,6 +68,7 @@
 		{ "number": "0x1b", "name": "SHL", "supported": true },
 		{ "number": "0x1c", "name": "SHR", "supported": true },
 		{ "number": "0x1d", "name": "SAR", "supported": true },
+		{ "number": "0x1e", "name": "CLZ", "supported": true },
 		{ "number": "0x20", "name": "KECCAK256", "supported": true },
 		{ "number": "0x30", "name": "ADDRESS", "supported": true },
 		{ "number": "0x31", "name": "BALANCE", "supported": true },
@@ -94,8 +95,8 @@
 		{ "number": "0x46", "name": "CHAINID", "supported": true },
 		{ "number": "0x47", "name": "SELFBALANCE", "supported": true },
 		{ "number": "0x48", "name": "BASEFEE", "supported": true },
-		{ "number": "0x49", "name": "BLOBHASH", "supported": false },
-		{ "number": "0x4a", "name": "BLOBBASEFEE", "supported": false },
+		{ "number": "0x49", "name": "BLOBHASH", "supported": true },
+		{ "number": "0x4a", "name": "BLOBBASEFEE", "supported": true },
 		{ "number": "0x50", "name": "POP", "supported": true },
 		{ "number": "0x51", "name": "MLOAD", "supported": true },
 		{ "number": "0x52", "name": "MSTORE", "supported": true },
@@ -108,10 +109,10 @@
 		{ "number": "0x59", "name": "MSIZE", "supported": true },
 		{ "number": "0x5a", "name": "GAS", "supported": true },
 		{ "number": "0x5b", "name": "JUMPDEST", "supported": true },
-		{ "number": "0x5c", "name": "TLOAD", "supported": false },
-		{ "number": "0x5d", "name": "TSTORE", "supported": false },
-		{ "number": "0x5e", "name": "MCOPY", "supported": false },
-		{ "number": "0x5f", "name": "PUSH0", "supported": false },
+		{ "number": "0x5c", "name": "TLOAD", "supported": true },
+		{ "number": "0x5d", "name": "TSTORE", "supported": true },
+		{ "number": "0x5e", "name": "MCOPY", "supported": true },
+		{ "number": "0x5f", "name": "PUSH0", "supported": true },
 		{ "number": "0x60", "name": "PUSH1", "supported": true },
 		{ "number": "0x61", "name": "PUSH2", "supported": true },
 		{ "number": "0x62", "name": "PUSH3", "supported": true },
@@ -285,12 +286,12 @@
 		{
 			"name": "point evaluation",
 			"address": "0x000000000000000000000000000000000000000a",
-			"implemented": false
+			"implemented": true
 		},
 		{
 			"name": "secp256r1",
 			"address": "0x0000000000000000000000000000000000000100",
-			"implemented": false
+			"implemented": true
 		}
 	],
 	"evmStackAddresses": {
diff --git a/script/data/chain/8453.json b/script/data/chain/8453.json
index 6e1ed59..40b8e8b 100644
--- a/script/data/chain/8453.json
+++ b/script/data/chain/8453.json
@@ -64,6 +64,7 @@
 		{ "number": "0x1b", "name": "SHL", "supported": true },
 		{ "number": "0x1c", "name": "SHR", "supported": true },
 		{ "number": "0x1d", "name": "SAR", "supported": true },
+		{ "number": "0x1e", "name": "CLZ", "supported": false },
 		{ "number": "0x20", "name": "KECCAK256", "supported": true },
 		{ "number": "0x30", "name": "ADDRESS", "supported": true },
 		{ "number": "0x31", "name": "BALANCE", "supported": true },
diff --git a/script/data/feature/metadata.json b/script/data/feature/metadata.json
index d3a1c0f..e3f657d 100644
--- a/script/data/feature/metadata.json
+++ b/script/data/feature/metadata.json
@@ -176,7 +176,12 @@
 		],
 		"faucets": [],
 		"icon": "mode",
-		"rpc": ["https://mainnet.mode.network", "https://mode.drpc.org", "wss://mode.drpc.org"]
+		"rpc": [
+			"https://mainnet.mode.network",
+			"https://mode.drpc.org",
+			"wss://mode.drpc.org",
+			"https://mode-mainnet.g.alchemy.com/v2/${ALCHEMY_API_KEY}"
+		]
 	},
 	"42161": {
 		"name": "Arbitrum One",
@@ -232,7 +237,8 @@
 			"wss://avalanche-c-chain-rpc.publicnode.com",
 			"https://rpc.ankr.com/avalanche",
 			"https://ava-mainnet.public.blastapi.io/ext/bc/C/rpc",
-			"https://avalanche-mainnet.infura.io/v3/${INFURA_API_KEY}"
+			"https://avalanche-mainnet.infura.io/v3/${INFURA_API_KEY}",
+			"https://avax-mainnet.g.alchemy.com/v2/${ALCHEMY_API_KEY}"
 		],
 		"slip44": 9005
 	},
diff --git a/script/data/feature/opcodes.json b/script/data/feature/opcodes.json
index a883d76..44ebf39 100644
--- a/script/data/feature/opcodes.json
+++ b/script/data/feature/opcodes.json
@@ -26,6 +26,7 @@
 		{ "number": "0x1b", "name": "SHL", "supported": true },
 		{ "number": "0x1c", "name": "SHR", "supported": true },
 		{ "number": "0x1d", "name": "SAR", "supported": true },
+		{ "number": "0x1e", "name": "CLZ", "supported": true },
 		{ "number": "0x20", "name": "KECCAK256", "supported": true },
 		{ "number": "0x30", "name": "ADDRESS", "supported": true },
 		{ "number": "0x31", "name": "BALANCE", "supported": true },
@@ -177,6 +178,7 @@
 		{ "number": "0x1b", "name": "SHL", "supported": true },
 		{ "number": "0x1c", "name": "SHR", "supported": true },
 		{ "number": "0x1d", "name": "SAR", "supported": true },
+		{ "number": "0x1e", "name": "CLZ", "supported": false },
 		{ "number": "0x20", "name": "KECCAK256", "supported": true },
 		{ "number": "0x30", "name": "ADDRESS", "supported": true },
 		{ "number": "0x31", "name": "BALANCE", "supported": true },
@@ -328,6 +330,7 @@
 		{ "number": "0x1b", "name": "SHL", "supported": true },
 		{ "number": "0x1c", "name": "SHR", "supported": true },
 		{ "number": "0x1d", "name": "SAR", "supported": true },
+		{ "number": "0x1e", "name": "CLZ", "supported": false },
 		{ "number": "0x20", "name": "KECCAK256", "supported": true },
 		{ "number": "0x30", "name": "ADDRESS", "supported": true },
 		{ "number": "0x31", "name": "BALANCE", "supported": true },
@@ -479,6 +482,7 @@
 		{ "number": "0x1b", "name": "SHL", "supported": true },
 		{ "number": "0x1c", "name": "SHR", "supported": true },
 		{ "number": "0x1d", "name": "SAR", "supported": true },
+		{ "number": "0x1e", "name": "CLZ", "supported": false },
 		{ "number": "0x20", "name": "KECCAK256", "supported": true },
 		{ "number": "0x30", "name": "ADDRESS", "supported": true },
 		{ "number": "0x31", "name": "BALANCE", "supported": true },
@@ -630,6 +634,7 @@
 		{ "number": "0x1b", "name": "SHL", "supported": true },
 		{ "number": "0x1c", "name": "SHR", "supported": true },
 		{ "number": "0x1d", "name": "SAR", "supported": true },
+		{ "number": "0x1e", "name": "CLZ", "supported": false },
 		{ "number": "0x20", "name": "KECCAK256", "supported": true },
 		{ "number": "0x30", "name": "ADDRESS", "supported": true },
 		{ "number": "0x31", "name": "BALANCE", "supported": true },
@@ -781,6 +786,7 @@
 		{ "number": "0x1b", "name": "SHL", "supported": true },
 		{ "number": "0x1c", "name": "SHR", "supported": true },
 		{ "number": "0x1d", "name": "SAR", "supported": true },
+		{ "number": "0x1e", "name": "CLZ", "supported": true },
 		{ "number": "0x20", "name": "KECCAK256", "supported": true },
 		{ "number": "0x30", "name": "ADDRESS", "supported": true },
 		{ "number": "0x31", "name": "BALANCE", "supported": true },
@@ -932,6 +938,7 @@
 		{ "number": "0x1b", "name": "SHL", "supported": true },
 		{ "number": "0x1c", "name": "SHR", "supported": true },
 		{ "number": "0x1d", "name": "SAR", "supported": true },
+		{ "number": "0x1e", "name": "CLZ", "supported": false },
 		{ "number": "0x20", "name": "KECCAK256", "supported": true },
 		{ "number": "0x30", "name": "ADDRESS", "supported": true },
 		{ "number": "0x31", "name": "BALANCE", "supported": true },
@@ -1083,6 +1090,7 @@
 		{ "number": "0x1b", "name": "SHL", "supported": true },
 		{ "number": "0x1c", "name": "SHR", "supported": true },
 		{ "number": "0x1d", "name": "SAR", "supported": true },
+		{ "number": "0x1e", "name": "CLZ", "supported": true },
 		{ "number": "0x20", "name": "KECCAK256", "supported": true },
 		{ "number": "0x30", "name": "ADDRESS", "supported": true },
 		{ "number": "0x31", "name": "BALANCE", "supported": true },
@@ -1109,8 +1117,8 @@
 		{ "number": "0x46", "name": "CHAINID", "supported": true },
 		{ "number": "0x47", "name": "SELFBALANCE", "supported": true },
 		{ "number": "0x48", "name": "BASEFEE", "supported": true },
-		{ "number": "0x49", "name": "BLOBHASH", "supported": false },
-		{ "number": "0x4a", "name": "BLOBBASEFEE", "supported": false },
+		{ "number": "0x49", "name": "BLOBHASH", "supported": true },
+		{ "number": "0x4a", "name": "BLOBBASEFEE", "supported": true },
 		{ "number": "0x50", "name": "POP", "supported": true },
 		{ "number": "0x51", "name": "MLOAD", "supported": true },
 		{ "number": "0x52", "name": "MSTORE", "supported": true },
@@ -1123,10 +1131,10 @@
 		{ "number": "0x59", "name": "MSIZE", "supported": true },
 		{ "number": "0x5a", "name": "GAS", "supported": true },
 		{ "number": "0x5b", "name": "JUMPDEST", "supported": true },
-		{ "number": "0x5c", "name": "TLOAD", "supported": false },
-		{ "number": "0x5d", "name": "TSTORE", "supported": false },
-		{ "number": "0x5e", "name": "MCOPY", "supported": false },
-		{ "number": "0x5f", "name": "PUSH0", "supported": false },
+		{ "number": "0x5c", "name": "TLOAD", "supported": true },
+		{ "number": "0x5d", "name": "TSTORE", "supported": true },
+		{ "number": "0x5e", "name": "MCOPY", "supported": true },
+		{ "number": "0x5f", "name": "PUSH0", "supported": true },
 		{ "number": "0x60", "name": "PUSH1", "supported": true },
 		{ "number": "0x61", "name": "PUSH2", "supported": true },
 		{ "number": "0x62", "name": "PUSH3", "supported": true },
@@ -1234,6 +1242,7 @@
 		{ "number": "0x1b", "name": "SHL", "supported": true },
 		{ "number": "0x1c", "name": "SHR", "supported": true },
 		{ "number": "0x1d", "name": "SAR", "supported": true },
+		{ "number": "0x1e", "name": "CLZ", "supported": true },
 		{ "number": "0x20", "name": "KECCAK256", "supported": true },
 		{ "number": "0x30", "name": "ADDRESS", "supported": true },
 		{ "number": "0x31", "name": "BALANCE", "supported": true },
diff --git a/script/data/feature/precompiles.json b/script/data/feature/precompiles.json
index 8485c68..25b9280 100644
--- a/script/data/feature/precompiles.json
+++ b/script/data/feature/precompiles.json
@@ -53,7 +53,7 @@
 		{
 			"name": "secp256r1",
 			"address": "0x0000000000000000000000000000000000000100",
-			"implemented": false
+			"implemented": true
 		}
 	],
 	"10": [
@@ -162,7 +162,7 @@
 		{
 			"name": "point evaluation",
 			"address": "0x000000000000000000000000000000000000000a",
-			"implemented": false
+			"implemented": true
 		},
 		{
 			"name": "secp256r1",
@@ -395,7 +395,7 @@
 		{
 			"name": "secp256r1",
 			"address": "0x0000000000000000000000000000000000000100",
-			"implemented": false
+			"implemented": true
 		}
 	],
 	"59144": [
@@ -447,12 +447,12 @@
 		{
 			"name": "point evaluation",
 			"address": "0x000000000000000000000000000000000000000a",
-			"implemented": false
+			"implemented": true
 		},
 		{
 			"name": "secp256r1",
 			"address": "0x0000000000000000000000000000000000000100",
-			"implemented": false
+			"implemented": true
 		}
 	],
 	"534352": [
@@ -509,7 +509,7 @@
 		{
 			"name": "secp256r1",
 			"address": "0x0000000000000000000000000000000000000100",
-			"implemented": false
+			"implemented": true
 		}
 	]
 }
diff --git a/script/index.ts b/script/index.ts
index ad91ca4..32dd956 100644
--- a/script/index.ts
+++ b/script/index.ts
@@ -40,12 +40,12 @@ async function main() {
 	const client = initClient(rpcUrls);
 
 	// Fetch data.
-	const [opcodes, deployedContracts, precompiles, evmStackAddresses] = await Promise.all([
-		checkOpcodes(client),
-		checkDeployedContracts(client),
-		checkPrecompiles(client),
-		checkEvmStackAddresses(client),
-	]);
+	const [opcodes, deployedContracts, precompiles, evmStackAddresses] = [
+		await checkOpcodes(client),
+		await checkDeployedContracts(client),
+		await checkPrecompiles(client),
+		await checkEvmStackAddresses(client),
+	];
 
 	// Format and save the output.
 	const chain: Chain = {
@@ -126,37 +126,22 @@ function selectRpcUrls(rpcUrls: string[]): string[] {
 		return str;
 	};
 
-	// These domains have various issues that make them unsuitable for our purposes.
-	const domainsToSkip = [
-		'drpc.org', // Required "to" is empty.
-		'blocknative.com', // Transaction creation failed.
-		'flashbots.net', // 403 (also on eth_call with no to).
-		'mevblocker.io', // 429's easily.
-		'matic-mainnet-full-rpc.bwarelabs.com', // "This endpoint is deprecated".
-		'publicnode.com', // Transaction creation failed.
-		'cloudflare', // Requested resource not found.
-		'api.avax.network', // Unrecognized token '<', 429's easily.
-		'rpc.linea.build', // All error messages are identical so can't distinguish opcode support.
-	];
-	const filteredRpcUrls = rpcUrls.filter(
-		(url) => !domainsToSkip.some((domain) => url.includes(domain)),
-	);
-
-	// Check for URLs with placeholders and replace with API key if available. In this case, we
-	// return this URL as the selected RPC URL. Preferring URLs with API keys this way helps
-	// avoid rate limits and other issues.
+	// Use only URLs with placeholders and replace with API key if available. In this case, we
+	// return this URL as the selected RPC URL.
 	const replacedUrls: string[] = [];
-	const normalUrls: string[] = [];
-	for (const url of filteredRpcUrls) {
+	for (const url of rpcUrls) {
 		if (hasPlaceholder(url)) {
 			const replacedUrl = replacePlaceholder(url);
 			if (replacedUrl !== url) replacedUrls.push(replacedUrl);
-		} else {
-			normalUrls.push(url);
 		}
 	}
 
-	return [...replacedUrls, ...normalUrls]; // Prefer URLs with API keys.
+	if (replacedUrls.length === 0) {
+		console.error('No RPC URLs with API keys found for this chain');
+		process.exit(1);
+	}
+
+	return replacedUrls;
 }
 
 main().catch((error) => {
diff --git a/script/input.json b/script/input.json
index 922c9bb..eea1e8a 100644
--- a/script/input.json
+++ b/script/input.json
@@ -22,11 +22,14 @@
 	},
 	{
 		"chainId": 8453,
-		"rpcUrls": ["https://base-mainnet.infura.io/v3/${INFURA_API_KEY}"]
+		"rpcUrls": [
+			"https://base-mainnet.infura.io/v3/${INFURA_API_KEY}",
+			"https://base-mainnet.g.alchemy.com/v2/${ALCHEMY_API_KEY}"
+		]
 	},
 	{
 		"chainId": 34443,
-		"rpcUrls": []
+		"rpcUrls": ["https://mode-mainnet.g.alchemy.com/v2/${ALCHEMY_API_KEY}"]
 	},
 	{
 		"chainId": 42161,
@@ -41,7 +44,8 @@
 			"https://avalanche-c-chain-rpc.publicnode.com",
 			"https://rpc.ankr.com/avalanche",
 			"https://ava-mainnet.public.blastapi.io/ext/bc/C/rpc",
-			"https://avalanche-mainnet.infura.io/v3/${INFURA_API_KEY}"
+			"https://avalanche-mainnet.infura.io/v3/${INFURA_API_KEY}",
+			"https://avax-mainnet.g.alchemy.com/v2/${ALCHEMY_API_KEY}"
 		]
 	},
 	{
diff --git a/script/prepare-chain-data.sh b/script/prepare-chain-data.sh
index bb68ad6..8ae31a9 100644
--- a/script/prepare-chain-data.sh
+++ b/script/prepare-chain-data.sh
@@ -1,6 +1,9 @@
 #!/bin/bash
 set -euo pipefail
 
+# Ensure deterministic glob ordering across environments
+export LC_ALL=C
+
 # First we get list of all chains.
 CHAIN_DIR="./script/data/chain"
 OUTPUT_FILE="./src/lib/chains.json"