indexing-transactions - SKILL.md Agent Skill

name: indexing-transactions description: >- Use when needing transaction-level data in handlers. Configure field_selection to include transaction fields on events, and access via event.transaction. No native transaction handler — access through event handlers.

Transaction Data

HyperIndex does not have a native transaction handler (onTransaction). Transaction data is accessed through event handlers via field_selection in config.yaml.

Configuring Transaction Fields

By default, event.transaction is empty. Select needed fields explicitly:

contracts:
  - name: MyContract
    events:
      - event: Transfer(indexed address from, indexed address to, uint256 value)
        field_selection:
          transaction_fields:
            - hash
            - from
            - to
            - gasUsed
            - value

Or globally for all events:

field_selection:
  transaction_fields:
    - hash
    - from
    - to

Accessing in Handlers

Contract.Transfer.handler(async ({ event, context }) => {
  const txHash = event.transaction.hash;
  const txFrom = event.transaction.from;
  const gasUsed = event.transaction.gasUsed;
});

Available Transaction Fields

transactionIndex, hash, from, to, gas, gasPrice, maxPriorityFeePerGas, maxFeePerGas, cumulativeGasUsed, effectiveGasPrice, gasUsed, input, nonce, value, v, r, s, contractAddress, logsBloom, root, status, yParity, chainId, maxFeePerBlobGas, blobVersionedHashes, type, l1Fee, l1GasPrice, l1GasUsed, l1FeeScalar, gasUsedForL1

Available Block Fields

Block fields are also configurable via block_fields. Default: number, timestamp, hash.

Additional: parentHash, nonce, sha3Uncles, logsBloom, transactionsRoot, stateRoot, receiptsRoot, miner, difficulty, totalDifficulty, extraData, size, gasLimit, gasUsed, uncles, baseFeePerGas, blobGasUsed, excessBlobGas, parentBeaconBlockRoot, withdrawalsRoot, l1BlockNumber

Deep Documentation

Full reference: https://docs.envio.dev/docs/HyperIndex-LLM/hyperindex-complete