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No. A transaction hash is a lookup key. It lets you retrieve a transaction and, separately, its receipt from an Ethereum node. Neither object records why an automation decided to act, which inputs and policy version it applied, or whether the outcome was the right one. A defensible audit trail for onchain automation has two halves: chain evidence (the transaction, receipt, logs and, where needed, a trace, anchored to a block) and an offchain decision record that links each hash back to the run that produced it. The field names, method names and tracing behaviour below are Ethereum’s. Other networks differ and are flagged where that matters.
What a transaction hash identifies
A transaction hash is an identifier. Passing it to the Ethereum JSON-RPC API (the eth_getTransactionByHash method) returns the transaction object: the block hash and number where it was included, the sender and recipient, input data, nonce, value, gas fields and the hash itself. That tells you what was submitted and where it landed, within the chain context you queried. It says nothing about the software that built the transaction. The hash contains no narrative, no trigger and no record of the rule that produced it.
The receipt shows execution status, not intent
The receipt is a separate lookup, eth_getTransactionReceipt. In the documented format it carries the transaction hash, block position, sender and recipient, gas used, logs, a logs bloom and a status field. A status of 1 means success and 0 means failure; in JSON-RPC responses these appear as 0x1 and 0x0. A transaction that is still pending has no receipt. Record that state as pending rather than treating the missing receipt as a failure.
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Logs and events record what contracts announced
Contracts declare events in their code and emit them during execution. Applications can listen for those events and index them. The official Ethereum documentation on logging uses the ERC-20 Transfer event as its example, which carries the sender, recipient and amount. A log therefore shows that the contract emitted that event in that transaction, when it is read against the correct ABI. It does not explain why the automation called the contract. An event can say that a transfer happened; it cannot say the transfer was the policy’s intended action unless your own record connects the two.
Decoded event names and fields are a view produced by an ABI. If the ABI changes, the same raw log can display differently. Keep the ABI version with any decoded output.
Traces show what happened inside a call
Receipts stop at the outcome. For a complex contract interaction, such as a single transaction that moves funds through several contracts, the question “what did this transaction actually do?” needs more detail. The Go Ethereum project’s EVM tracing documentation explains the gap directly:
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A trace fills that gap. It is produced by a client or tracing service, not stored by the chain itself, and not every RPC endpoint exposes traces. On Geth-compatible nodes the call is typically debug_traceTransaction, but availability depends on how the node is configured and which provider you use. Record the tracing client, its version, the parameters you requested and the retrieval time. A trace is strong diagnostic evidence of what executed. It is still not a record of intent. The offchain record has to say why the call was made.
Anchoring chain evidence to blocks
Chain evidence should be tied to a block, not to a free-floating hash. The Ethereum block documentation lists the block hash, transaction root, receipts root and logs bloom among the header fields. Storing the block hash alongside the receipt lets a later reader confirm that the receipt belongs to the block you observed.
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Reorganizations
A block you observed can be replaced. Record each observation of inclusion or confirmation with its block number, block hash and timestamp. If a later check finds a different block hash at the same height, or the transaction is no longer present, that change is itself audit evidence. A single “confirmed” label from a dashboard hides this history.
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Finality labels
The Ethereum JSON-RPC reference documents block tags, including safe and finalized, for supported methods. Whether a tag is available, and what it guarantees, depends on the chain and the client. Record the tag you queried and the block it returned, rather than assuming what the tag means on every network.
Verifiable log responses
EIP-7792, titled “Verifiable logs”, proposes that eth_getLogs responses be verifiable. Its motivation is that checking log correctness and completeness from headers and blooms alone is inefficient. The proposal was created on 2024-10-21 and, as of this writing, is listed on the standards track with a stagnant status. Treat it as a design direction, not a capability you can assume your provider offers.
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Comparing the evidence views you will be shown
When a dashboard, indexer or RPC provider presents a transaction story, it is usually showing one of the views below. Each answers a different question.
| View | What it covers | Provenance to record | Typical gap |
|---|---|---|---|
| Transaction object | Submitted fields and block inclusion | Chain ID, node or provider, request time | Says nothing about the decision that produced it |
| Receipt and logs | Execution status, gas used, emitted events | Same as above, plus the ABI version used for decoding | Status 1 does not mean the outcome was correct |
| Decoded event feed from an indexer | Human-readable event names and fields | Indexer version, ABI used, indexed block range | Decoding can change between versions, and the raw log behind a field may not be shown |
| Execution trace | Internal calls and state effects | Tracing client, client version, request parameters | Not available on every endpoint; diagnostic only, not intent |
| Dashboard status (“confirmed”) | A summary label | The underlying block hash and observation time | Hides reorganizations and which finality tag was applied |
Ask one more question of every view: could another operator repeat the request with your stored identifiers and get the same raw data? If not, what you hold is a summary, not evidence.
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The chain artifacts answer “what did the chain record?” The decision record answers “why did the system act?” Store it under a stable run or action ID, and attach every chain artifact to that ID. The list below is an engineering checklist, not a formal standard.
Identity and code
- Network name and chain ID.
- Contract addresses and the ABI or source reference used to decode their events.
- Automation code version and the configuration or policy version in force.
Trigger and inputs
- Trigger type and trigger time.
- Upstream data sources and the observed state, price or oracle values the run used.
- Decision result, reason codes, thresholds, and any human approval with the approver’s identifier.
Submission and signing
- Signer, wallet or service identifier. Never store the private key or seed phrase.
- Authorization and signing timestamps.
- Submitted transaction hash, nonce, sender, destination, value and fee parameters.
- Calldata, or a protected reference to it where the payload is sensitive.
- Links from each retry or replacement to the attempt it followed.
Chain observations
- Receipt status, block number and hash, transaction index and gas used.
- Raw logs alongside their decoded form, with the ABI version that produced the decoding.
- Each confirmation or finality observation with its timestamp, and any replacement or reorganization seen.
Trace and provider provenance
- Trace payload where the action required one, with the tracing client, its version, the parameters and the retrieval time.
- RPC or provider identity, client version where known, and any errors or timeouts, with the source of each observation.
Outcome and integrity
- The application action taken and the reconciliation result.
- Incident annotations.
- Retention and integrity controls set by your own policy.
The official Ethereum documentation describes transaction, receipt, block, event and tracing data. It does not prescribe a complete cross-chain audit schema, a retention period or a record policy for regulators. Those decisions belong to your organisation and to the rules that apply to it.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Reconstructing one automated action
Use this sequence when you need to explain a specific transaction. Each step produces a stored artifact.
- Confirm the network. Record the chain ID from the node or provider before any lookup, so every later response is tied to a named network.
- Retrieve the transaction. Call
eth_getTransactionByHashwith the stored hash. Save the full response, the request time and the provider identity. If nothing is returned, the node does not know the hash; try a second node and record both results. - Retrieve the receipt. Call
eth_getTransactionReceipt. If no receipt exists, the transaction is pending or unknown to that node. Record the state, retry later, and do not treat it as a failure. - Read the status and block. Check the status (
0x1or0x0) and save the block number and block hash from the receipt. - Decode the logs. Decode with the ABI version in your record. Save the raw logs and the decoded output as separate artifacts.
- Re-check the block. Later, fetch the block at the same height and compare its hash. A difference means the block was replaced; record it.
- Trace only when needed. For a multi-step interaction, request a trace from a node that supports it, and record the client version and parameters.
- Join to the run. Match the hash to the run ID, then check the decision record for the policy version, inputs and approval that produced the transaction.
Troubleshooting common gaps
- No receipt is returned. The transaction is pending, was dropped, or is unknown to this node. Compare against another node before drawing a conclusion, and record the absence with a timestamp.
- Status is
1, but the result looks wrong. The transaction executed as designed by the contract. Check the stored inputs, the policy version and the approval first. Pull a trace only if the question concerns internal calls. - Two tools show different event names or fields. They are decoding the same raw log with different ABIs or versions. Compare the raw log and the ABI version each tool used.
- No trace is available. The endpoint does not expose tracing. Use a node or tracing service that does, and record which one you used.
- A “confirmed” status later points to a different block hash. A reorganization or replacement occurred. Your stored observation history shows when the block changed.
Scope note: the behaviour above applies to Ethereum and Geth-compatible tooling. Receipt fields, trace methods, finality tags and proof support on other networks have to be checked for that network and client.
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