mev-inspect/lib/generalized/traces.js

A JS port of 'mev-inspect-py' optimised for ease of use.

async function getTransactionTrace(provider, hash) {
    const response = (await provider.send('trace_replayTransaction', [
        hash,
        ['trace'],
    ]));
    return parseTrace(response);
}
async function getBlockTraces(provider, block) {
    const response = (await provider.send('trace_replayBlockTransactions', [
        block,
        ['trace'],
    ]));
    for (const trace of response) {
        if (!trace.trace) {
            return null;
        }
    }
    return Object.fromEntries(response.map((replay) => {
        return [replay.transactionHash, parseTrace(replay)];
    }));
}
function parseTrace(replay) {
    return {
        calls: replay.trace
            .filter((trace) => trace.type === 'call' && 'result' in trace)
            .map((trace) => {
            const { action, result } = trace;
            return {
                from: action.from,
                to: action.to,
                input: action.input,
                output: result.output,
                value: BigInt(action.value),
                gas: BigInt(action.gas),
                gasUsed: BigInt(result.gasUsed),
            };
        }),
    };
}
export { getBlockTraces, getTransactionTrace };
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