Contract Deployment Salt Generator

WHAT IT DOES

Contract Deployment Salt Generator is a read-only developer tool that generates deterministic salts for CREATE2 contract deployments. It reads the deployer address, an optional target address, the bytecode hash (keccak256 of the creation code), salt generation parameters (pattern, length, and prefix), chain ID, and previous salt generation records. The tool then generates a salt value based on the provided pattern and length, computes the resulting CREATE2 address, and checks whether the address is already in use. This allows developers to create unique salts that produce predictable addresses for their deployments.

HOW TO USE

Connect your wallet via the built-in connector. Select the network where you plan to deploy. Enter the deployer address, the bytecode hash (keccak256 of the creation code), an optional salt pattern (e.g., "0x1234" or a string like "my_salt"), the desired salt length (in bytes, default 32), and an optional target address for collision checking. The tool will generate a deterministic salt, display it prominently, and compute the resulting CREATE2 address. It also shows: deployer address, bytecode hash, salt pattern, salt length, target address, chain ID, the precomputed address, and whether the address is already in use. No transaction is signed or sent—this is a read-only computation.

TECHNICAL MECHANISM

The tool uses ethers.js v5.7.2 to generate salts and compute CREATE2 addresses. The salt is generated by hashing the concatenation of the salt pattern, deployer address, and a timestamp (for uniqueness) using `keccak256(utf8Bytes(seed))`. The resulting hash is then trimmed or padded to the requested salt length using `ethers.utils.keccak256`. If the length is less than 32 bytes, the salt is truncated; if greater, it is padded with zeros. The CREATE2 address is computed using the formula: `address = keccak256(0xff + deployer + salt + keccak256(init_code))[12:]`. The tool uses `ethers.utils.solidityPack` to pack the components: `0xff` (1 byte), the deployer address (20 bytes), the salt (variable length, padded to 32 bytes), and the init code hash (32 bytes). The keccak256 hash of this packed data is then taken, and the last 20 bytes are extracted and converted to a checksummed address using `ethers.utils.getAddress`. The tool also reads the current chain ID using `provider.getNetwork()` and checks if the precomputed address is already in use by fetching the code at that address using `provider.getCode(address)`. All reads are performed through the user's connected wallet provider—no centralized APIs are used.

WHAT IT CANNOT SEE

This tool cannot guarantee that the generated salt will result in a unique or collision-free address—different patterns may still produce the same salt. It cannot detect if the salt leads to an address already in use—this is checked but not guaranteed. It cannot verify that the bytecode is correct. It cannot ensure that the salt is compatible with all deployment methods (some require specific formats). It cannot predict gas costs for deployment with the generated salt. It cannot validate that the salt format is accepted by all compilers. It cannot verify that the generated address matches the intended deployment. It cannot detect if the deployer address has sufficient funds for the deployment.

PLEASE NOTE

This tool is EVM-only and supports Ethereum, Polygon, BNB Chain, Arbitrum, Optimism, and Avalanche. Salts are deterministic given the same inputs—use unique patterns to avoid collisions. The tool does not store or transmit any data. Always verify the generated salt and resulting address before deploying.