salt-bae

Background

Ever wanted to deploy a smart contract that had a cool address like 0xDEADBEEF... in it? This is possible with the CREATE2 EVM opcode.

The formula follows:

address = keccak256( 0xff ++ address ++ salt ++ keccak256(init_code))[12:]

address - deployer factory contract address
salt - random 32 byte string (what this code finds for you
init code - bytecode of contract to be deployed by factory

Usage

node index.js [deployAddress] [byteCodeHash] [start] [target]

[deployAddress] - deployer factory contract address
[byteCodeHash] - hashed bytecode
[start] - target start index
[target] - hex substring the address should contain

Example

node index.js 0xEd2cf286D2DaA16cE4B34b6029F805647309426C 0x3d62012120f6a3aa34878aa91e0c7cf72d5ffc0e8f46cceebef78f45d05844f2 0 c0de42

This will generate address 0xc0De423eA0845A6a4216A4462C89CFb7e7C6345e with a salt of 0x0000000000000000000000000000000000000000000000000000000001b5ac6b at the 28683371th iteration