> For the complete documentation index, see [llms.txt](https://docs.xyo.network/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.xyo.network/developers/cookbook/verify-a-transaction.md).

# Verify a Transaction

Verify that an XL1 transaction reached finalized chain state.

A returned transaction hash proves submission, not finality. Verify the transaction through the SDK viewer and finalized chain state.

```typescript
const transaction = await gateway.connection.viewer?.transaction.byHash(transactionHash)
```

Check all of the following:

* the viewer returned a transaction for the expected hash;
* the signer and network match the user-approved operation;
* the expected payload hashes and schemas are present;
* the containing block is finalized; and
* every dereferenced application payload passes your schema validator.

Use `ExplorerLinks` from `@xyo-network/xl1-sdk` when presenting a human-readable explorer link. Do not hand-build explorer URLs.


---

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