> For the complete documentation index, see [llms.txt](https://docs.crypitor.com/crypitor-service/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.crypitor.com/crypitor-service/how-to-use/erc20-transfer-event.md).

# Erc20 Transfer Event

When an ERC20 token transfer event occurs, Crypitor will send a JSON payload to your webhook endpoint. Below is an example of such a payload for a native transfer:

**Example Payload:**

```json
{
  "chain": "Polygon",
  "monitorId": "mo_9D6x28TXjI5TxfZp",
  "hash": "0x964d309e9df1ef0a898fa895a07d2dc4c47965671a2d4087d2648b9191ad6a58",
  "blockNumber": 57521001,
  "contract": {
    "address": "0x2791bca1f2de4661ed88a30c99a7a9449aa84174",
    "name": null,
    "symbol": null
  },
  "fromAddress": "0x1075f4967cc15d400013c153cfa3357408973747",
  "toAddress": "0x1075f4967cc15d400013c153cfa3357408973747",
  "tokenValue": "123100",
  "rawLog": {
    "topics": [
      "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
      "0x0000000000000000000000001075f4967cc15d400013c153cfa3357408973747",
      "0x0000000000000000000000001075f4967cc15d400013c153cfa3357408973747"
    ],
    "data": "0x000000000000000000000000000000000000000000000000000000000001e0dc"
  },
  "type": "in",
  "confirm": true,
  "category": "ERC20",
  "dateCreated": "2024-05-29T08:07:37.066Z",
  "logIndex": 413,
  "txnIndex": 88,
  "associatedAddress": "0x1075f4967cc15d400013c153cfa3357408973747",
  "eventId": "6ada205fa1e26721d686e7f7ee0b8366",
  "tags": [
    "crypitor"
  ]
}
```

#### Data Explanation

* **chain:** The blockchain network where the event occurred (e.g., Polygon).
* **monitorId:** Unique identifier for the monitor that captured the event.
* **hash:** Transaction hash associated with the event.
* **blockNumber:** Block number in which the transaction was included.
* **contract:** Contains details about the token contract.
  * **address:** Token contract address.
  * **name:** Token name (null if not available).
  * **symbol:** Token symbol (null if not available).
* **fromAddress:** Address from which the tokens were sent.
* **toAddress:** Address to which the tokens were sent.
* **tokenValue:** Amount of tokens transferred (in the smallest unit, e.g., wei for ETH).
* **rawLog:** Raw log data from the blockchain.
  * **topics:** Array of indexed log topics.
  * **data:** Hex-encoded log data.
* **type:** Transaction type (e.g., "in" for incoming, "out" for outgoing).
* **confirm:** Boolean indicating whether the transaction is confirmed.
* **category:** Type of token transfer (e.g., ERC20).
* **dateCreated:** Timestamp of when the event was detected.
* **logIndex:** Position of the log in the block.
* **txnIndex:** Position of the transaction in the block.
* **associatedAddress:** Wallet address associated with the event.
* **eventId:** Unique identifier for the event.
* **tags:** Tags associated with the monitor.