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import { AbiDecoder } from '@0xproject/utils';
import { AbiDefinition, LogEntry, LogWithDecodedArgs } from 'ethereum-types';
import { EventsResponseResult } from '../../data_sources/etherscan';
const hexRadix = 16;
function hexToInt(hex: string): number {
return parseInt(hex.replace('0x', ''), hexRadix);
}
// Converts a raw event response to a LogEntry
export function convertResponseToLogEntry(result: EventsResponseResult): LogEntry {
return {
logIndex: hexToInt(result.logIndex),
transactionIndex: hexToInt(result.transactionIndex),
transactionHash: result.transactionHash,
blockHash: '',
blockNumber: hexToInt(result.blockNumber),
address: result.address,
data: result.data,
topics: result.topics,
};
}
// Decodes a LogEntry into a LogWithDecodedArgs
export function decodeLogEntry<EventArgsType>(
contractAbi: AbiDefinition[],
log: LogEntry,
): LogWithDecodedArgs<EventArgsType> {
const abiDecoder = new AbiDecoder([contractAbi]);
const logWithDecodedArgs = abiDecoder.tryToDecodeLogOrNoop<EventArgsType>(log);
// tslint:disable-next-line:no-unnecessary-type-assertion
return logWithDecodedArgs as LogWithDecodedArgs<EventArgsType>;
}
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