# /v1/transactions/by\_version/{version} - Aptos

This endpoint gets a transaction by its ledger version number from Aptos blockchain.

## supported Network

* Mainnet

## Parameter

| **Parameter** | **Data type** | **Description**    | **Required** | **In** |
| ------------- | ------------- | ------------------ | ------------ | ------ |
| `version`     | integer       | The ledger version | Yes          | Path   |

## Request

**Base URL**

```bash
https://go.getblock.io/<ACCESS_TOKEN>
```

**Example(cURL)**

```curl
curl --location 'https://go.getblock.io/<ACCESS_TOKEN>/v1/transactions/by_version/3363904007'
```

## Response Example

```json
{
    "version": "3363904007",
    "hash": "0xd797b944ed8657406a1b09a5928048093399fc0a2f576d3e57c0f9cedbf95c4a",
    "state_change_hash": "0xafb6e14fe47d850fd0a7395bcfb997ffacf4715e0f895cc162c218e4a7564bc6",
    "event_root_hash": "0x414343554d554c41544f525f504c414345484f4c4445525f4841534800000000",
    "state_checkpoint_hash": "0xbf257d934f991d1e7d74079cc9060d3ac005aaa208d93a1fd4928dfc224bba53",
    "gas_used": "0",
    "success": true,
    "vm_status": "Executed successfully",
    "accumulator_root_hash": "0xc985314d5c118899c649b772c237178c63f328e7d286aceea01a30373d491d95",
    "changes": [],
    "timestamp": "1757261767411156",
    "block_end_info": {
        "block_gas_limit_reached": false,
        "block_output_limit_reached": false,
        "block_effective_block_gas_units": 500,
        "block_approx_output_size": 21541
    },
    "type": "block_epilogue_transaction"
}

```

## Response Parameter Definition

| **Field**                                            | **Type** | **Description**                                                           |
| ---------------------------------------------------- | -------- | ------------------------------------------------------------------------- |
| version                                              | String   | Global transaction version number.                                        |
| hash                                                 | String   | Hash of the transaction.                                                  |
| state\_change\_hash                                  | String   | Hash of all state changes from this txn.                                  |
| event\_root\_hash                                    | String   | Merkle root hash of all events.                                           |
| state\_checkpoint\_hash                              | String   | Hash of the state checkpoint.                                             |
| gas\_used                                            | String   | Amount of gas consumed.                                                   |
| success                                              | Boolean  | Whether transaction executed successfully.                                |
| vm\_status                                           | String   | Result status from Aptos VM.                                              |
| accumulator\_root\_hash                              | String   | Global accumulator root hash.                                             |
| changes                                              | Array    | State changes applied (empty for system txns).                            |
| timestamp                                            | String   | Unix timestamp in microseconds.                                           |
| block\_end\_info                                     | Object   | Metadata about block execution.                                           |
| block\_end\_info.block\_gas\_limit\_reached          | Booleab  | Block’s gas limit was reached.                                            |
| block\_end\_info.block\_output\_limit\_reached       | Boolean  | Block’s output size limit was hit.                                        |
| block\_end\_info.block\_effective\_block\_gas\_units | Integer  | Effective gas used in this block.                                         |
| block\_end\_info.block\_approx\_output\_size         | Interger | Approximate output size of block in bytes.                                |
| type                                                 | String   | Transaction type (e.g., user\_transaction, block\_epilogue\_transaction). |

## Use cases

This method is used for:

* Retrieve details of a specific transaction by its version.
* Debug **failed transactions** by checking vm\_status.
* Build **explorers** that let users search transactions by version.
* Track **system-level transactions** like block epilogues.

## Code Example

**Node(axios)**

```js
const axios = require('axios');

let config = {
  method: 'get',
  maxBodyLength: Infinity,
  url: 'https://go.getblock.io/<ACCESS_TOKEN>/v1/transactions/by_version/3541136893',
};

axios.request(config)
.then((response) => {
  console.log(JSON.stringify(response.data));
})
.catch((error) => {
  console.log(error);
});
```

**Python(Request)**

```python
import requests

url = "https://go.getblock.io/<ACCESS_TOKEN>/v1/transactions/by_version/3541136893"

response = requests.request("GET", url, headers=headers, data=payload)

print(response.text)
```

## Error handling

| **Status Code** | **Error Message**              | **Cause**                                |
| --------------- | ------------------------------ | ---------------------------------------- |
| **403**         | forbidden                      | Missing or invalid \<ACCESS\_TOKEN>.     |
| **410**         | Ledger version has been pruned | Incorrect version number or being pruned |
| **500**         | Internal server error          | Node or network issue; retry later.      |

## Integration with Web3

By integrating `/v1/transactions/by_version/{version}`, developers can:

* **Trace exact transactions** for auditing or compliance.
* **Debug dApps** by fetching execution results and state changes.
* **Enable explorers** to link transactions with block details. **Monitor validators/system txns** like block prologues and epilogues.


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.getblock.io/api-reference/aptos-apt/apt_v1_transactions_by_version_version.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.