Understand EVM Smart Contract CREATE address

Nhan Cao

3 min read

·

May 31, 2025

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Structure

• Source Bytecode: combined from the contract source code
• Constructor Arguments Bytecode (optional): encoded from the constructor parameter. It’s empty if default constructor()
• Full Contract Creation Bytecode = concat ( Source Bytecode, Constructor Arguments Bytecode )
• Calculate the Input Data for contract creation transaction = concat ( Init Code, Full Contract Creation Bytecode )
• Where Init Code (Optional) = Create code, or function hash, function param

Example

DETERMINISTIC_DEPLOYER: 0x4e59b44847b379578588920cA78FbF26c0B4956C

• Get Contract Creation Bytecode: Go to contract tab https://etherscan.io/address/0x4e59b44847b379578588920ca78fbf26c0b4956c#code
• Data: 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffe03601600081602082378035828234f58015156039578182fd5b8082525050506014600cf3

• Constructor Arguments Bytecode: empty
• Get Input Data: Go to transaction tx https://etherscan.io/tx/0xeddf9e61fb9d8f5111840daef55e5fde0041f5702856532cdbb5a02998033d26
• Data = Init Code + Contract bytecode