abi

func UnpackLogMessageToL2 ¶

func UnpackLogMessageToL2(data []byte) (payload []Word, nonce, fee Word, err error)

UnpackLogMessageToL2 decodes the data section of the Starknet core contract's LogMessageToL2 event into its three non-indexed fields.

Event ABI:

LogMessageToL2(address indexed fromAddress,
               uint256 indexed toAddress,
               uint256 indexed selector,
               uint256[] payload,
               uint256 nonce,
               uint256 fee)

The indexed fields are carried in log topics, not the data buffer, and are extracted by the caller. The data section encodes the remaining (uint256[], uint256, uint256) tuple per the Solidity ABI:

head[0] (32 bytes): offset to payload tail
head[1] (32 bytes): nonce
head[2] (32 bytes): fee
tail at head[0]:    length (32 bytes), then length × 32 bytes of elements