decodeEventLog

decodeEventLog(abi, log): object

Defined in: utils/decode-event-log.ts:71

Decodes an Ethereum event log using the provided ABI.

Matches topic0 against event signatures in the ABI, then decodes indexed parameters from topics[1..] and non-indexed parameters from data.

Parameters

abi

JSONABI

the JSON ABI array containing event definitions

log

the log object with topics array and data hex string

data

string

topics

string[]

Returns

object

an object with eventName and decoded args

args

args: Record<string, any>

eventName

eventName: string

Example

const result = decodeEventLog(erc20ABI, {
  topics: [
    '0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef',
    '0x000000000000000000000000abc0000000000000000000000000000000000001',
    '0x000000000000000000000000abc0000000000000000000000000000000000002',
  ],
  data: '0x0000000000000000000000000000000000000000000000000000000000000064',
});
// { eventName: 'Transfer', args: { from: '0xABC0...0001', to: '0xaBc0...0002', value: 100n } }