Multi-Chain CREATE2 Address Enforcer

WHAT IT DOES

Multi-Chain CREATE2 Address Enforcer enables you to compute and enforce the same CREATE2 contract address across multiple EVM-compatible blockchains from a single interface. The tool reads the deployment parameters you provide — contract bytecode, constructor arguments, salt, deployer address, and selected chains — then computes the deterministic CREATE2 address using the formula: keccak256(0xff + deployer + salt + keccak256(initCode))[12:]. It displays the predicted address and allows you to deploy the contract to multiple chains, ensuring the same address is used everywhere. After deployment, the tool tracks the deployed contract status on each chain and displays the results. This is ideal for cross-chain applications that require consistent contract addresses across multiple networks for deterministic address calculation, such as cross-chain bridges, token contracts, and factory patterns.

HOW TO USE

Connect your Web3 wallet (MetaMask, WalletConnect, or any EIP-1193 provider). The tool supports Ethereum, Polygon, Arbitrum, Optimism, Base, Avalanche C-Chain, and BNB Chain. Enter the contract bytecode as a hex string. Optionally provide ABI-encoded constructor arguments. Enter a salt value (bytes32) for the CREATE2 address computation. Specify the deployer address (use 0x0 to use your own address). Check the box for each chain where you want to enforce the address. The tool automatically computes the predicted CREATE2 address and displays it. Review the deployment summary showing the predicted address, bytecode hash, salt, deployer, selected chains, and estimated gas cost. When ready, click "Enforce address" — the tool will switch to each network sequentially, deploy the contract using CREATE2, and verify that the deployed address matches the predicted address. The tool shows real-time progress for each chain, displays the deployed address for each, and provides a summary of successful and failed deployments.

THE REAL MECHANISM

This tool does not rely on a cross-chain messaging protocol — it deploys sequentially using your wallet's signer, switching networks between deployments. The core of the tool is the CREATE2 address computation, which uses the formula: address = keccak256(0xff + deployer + salt + keccak256(initCode))[12:]. The tool computes this client-side using ethers.js, verifying that the predicted address matches what the contract will produce. For each selected chain, the tool constructs the deployment transaction with the bytecode and constructor arguments using a ContractFactory, and calls the deploy method with the salt parameter for CREATE2. The tool estimates gas using eth_estimateGas for each chain separately, accounting for different gas costs across networks. After each deployment, the tool waits for the transaction receipt and extracts the deployed contract address via contract.deployed(), then verifies it matches the predicted address. All gas costs are calculated using receipt.effectiveGasPrice to show actual gas cost, not the cap. The tool also captures the chain ID, block timestamp, and transaction hash for each deployment.

WHAT IT CANNOT SEE

Multi-Chain CREATE2 Address Enforcer cannot verify that the bytecode or constructor arguments are correct or match the intended contract. It cannot detect if the salt is valid, secure, or unique. It cannot guarantee that the predicted address will be available on all chains or that the address is not already in use. It cannot ensure that the contract will function as expected or that the contract logic is correct. It cannot prevent the deployer from losing access or control on some chains. It cannot recover gas costs if a deployment fails on one or more chains. It cannot verify that the address is correctly calculated across different EVM implementations or that the chain is compatible with the bytecode. It cannot detect if a chain has been compromised or is a fork. It cannot validate that the deployment parameters are correct for each chain. It cannot predict gas costs across different networks or account for network congestion. It cannot guarantee that the address is unique or that no other contract uses the same address.

PLEASE NOTE — EVM CHAINS ONLY

This tool works exclusively with EVM-compatible blockchains. Non-EVM chains are not supported. The tool does not manage private keys, sign anything outside the connected wallet's secure environment, or store deployment parameters persistently. It is a deployment interface that relies entirely on your wallet's signer and the blockchain networks. Always verify the deployed contract addresses and bytecode on each chain after deployment.