Create3Factory

Git Source

Forked from 0xSequence (https://github.com/0xSequence/create3/blob/master/contracts/Create3.sol)

State Variables

PROXY_BYTECODE

*The bytecode for a contract that proxies the creation of another contract. If this code is deployed using CREATE2 it can be used to decouple creationCode from the child contract address. The proxy bytecode constant encodes two parts:

1. Init code (first table): runs once at deployment, writes the runtime code to memory, and returns it.
2. Runtime code (second table): becomes the code stored on-chain; when executed, it forwards calldata and value into a CREATE. Initcode (runs once at deployment, writes runtime code to memory and returns it): ┌────────────┬───────────────────────┬──────────────────┬──────────────────────┐ │ Opcode │ Opcode + Arguments │ Mnemonic │ Stack View │ ├────────────┼───────────────────────┼──────────────────┼──────────────────────┤ │ 0x67 │ 0x67XXXXXXXXXXXXXXXX │ PUSH8 bytecode │ bytecode │ │ 0x3d │ 0x3d │ RETURNDATASIZE │ 0 bytecode │ │ 0x52 │ 0x52 │ MSTORE │ │ │ 0x60 │ 0x6008 │ PUSH1 08 │ 0x08 │ │ 0x60 │ 0x6018 │ PUSH1 18 │ 0x18 0x08 │ │ 0xf3 │ 0xf3 │ RETURN │ │ └────────────┴───────────────────────┴──────────────────┴──────────────────────┘ Runtime code (becomes the code stored on-chain, forwards calldata and value into CREATE): ┌────────────┬───────────────────────┬──────────────────┬──────────────────────┐ │ Opcode │ Opcode + Arguments │ Mnemonic │ Stack │ ├────────────┼───────────────────────┼──────────────────┼──────────────────────┤ │ 0x36 │ 0x36 │ CALLDATASIZE │ cds │ │ 0x3d │ 0x3d │ RETURNDATASIZE │ 0 cds │ │ 0x3d │ 0x3d │ RETURNDATASIZE │ 0 0 cds │ │ 0x37 │ 0x37 │ CALLDATACOPY │ │ │ 0x36 │ 0x36 │ CALLDATASIZE │ cds │ │ 0x3d │ 0x3d │ RETURNDATASIZE │ 0 cds │ │ 0x34 │ 0x34 │ CALLVALUE │ value 0 cds │ │ 0xf0 │ 0xf0 │ CREATE │ newContract │ └────────────┴───────────────────────┴──────────────────┴──────────────────────┘*

bytes internal constant PROXY_BYTECODE = hex"67363d3d37363d34f03d5260086018f3";

PROXY_BYTECODE_HASH

keccak256 hash of PROXY_BYTECODE.

bytes32 internal constant PROXY_BYTECODE_HASH = 0x21c35dbe1b344a2488cf3321d6ce542f8e9f305544ff09e4993a62319a497c1f;

Functions

_create3

Creates a new contract using CREATE3.

**

function _create3(bytes32 _saltDomain, bytes32 _salt, bytes memory _initCode) internal returns (address);

_computeAddress

Computes the resulting address of a contract deployed via CREATE3 from this factory, using address(this) and the given salt

The address creation formula is: keccak256(rlp([keccak256(0xff ++ address(this) ++ _salt ++ keccak256(initCode))[12:], 0x01]))

function _computeAddress(bytes32 _namespacedSalt) internal view returns (address);

_computeNamespacedSalt

Computes a namespaced salt from a domain and user-provided salt.

function _computeNamespacedSalt(bytes32 domain, bytes32 userSalt) internal pure returns (bytes32);