kleros/foresight/indexer-traces

Trace Indexing

Current Status

HyperSync supports full trace queries at the data layer, but the Envio Indexer does not yet expose a handler-level trace API (like onTrace).

HyperSync Trace Support

HyperSync can query traces with filtering by:

• from / to — sender/recipient addresses
• address — contract address
• callType — call, delegatecall, staticcall
• type — call, create, suicide, reward
• sighash — function signatures

Available trace fields: From, To, CallType, Gas, Input, Value, GasUsed, Output, Subtraces, TraceAddress, TransactionHash, BlockNumber, Error, and more.

Workaround

For trace-dependent indexing, use the Effect API to fetch trace data from an RPC endpoint:

import { createEffect, S } from "envio";
const getTraces = createEffect(
  {
    name: "getTraces",
    input: S.schema({ blockNumber: S.number }),
    output: S.unknown,
    cache: true,
  },
  async ({ input }) => {
    const res = await fetch(RPC_URL, {
      method: "POST",
      body: JSON.stringify({
        jsonrpc: "2.0",
        method: "trace_block",
        params: [`0x${input.blockNumber.toString(16)}`],
        id: 1,
      }),
    });
    return (await res.json()).result;
  },
);

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