Event Topic

Calculate EVM event topic hashes from Solidity event signatures.

Event Signature

Result

Signature

—

Topic Hash (32 bytes)

0x________________________________________________________________

Generate EVM event topic hashes (32-byte identifiers) from Solidity event signatures. The topic hash is the keccak256 hash of the canonical event signature, used as topic[0] in event logs.

How to use: Use the Signature tab to enter a full signature string, or the Builder tab to construct one from event name and parameter types.