Erc721 Transfer Event

ERC721 (NFT) transfer event data example and explaination

When an ERC721 NFT event occurs, Crypitor sends a JSON payload to your webhook endpoint. Below is an example of such a payload and an explanation of its structure:

Example Payload:

{
  "chain": "POLYGON",
  "monitorId": "mo_I23ghOScgZ9xLXhV",
  "hash": "0x44ca44cca1975d6918518bd4d2d484f50c7d45e7ed4c37a9695417033bb48ac4",
  "blockNum": 56955885,
  "contract": {
    "address": "0x8751de7f7dbb9708873a4cfbad5121fc3aad7856",
    "name": null,
    "symbol": null
  },
  "fromAddress": "0x0000000000000000000000000000000000000000",
  "toAddress": "0x49f43316370482ef3aa117c168845519ad4c5e84",
  "tokenId": "281",
  "rawLog": {
    "topics": [
      "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
      "0x0000000000000000000000000000000000000000000000000000000000000000",
      "0x00000000000000000000000049f43316370482ef3aa117c168845519ad4c5e84",
      "0x0000000000000000000000000000000000000000000000000000000000000119"
    ],
    "data": "0x"
  },
  "type": "in",
  "confirm": false,
  "category": "ERC721",
  "dateCreated": "2024-05-14T10:41:02.424Z",
  "logIndex": 302,
  "txnIndex": 63,
  "associatedAddress": "0x49f43316370482ef3aa117c168845519ad4c5e84",
  "eventId": "5169d4e4ee9467f861a160f38da17805",
  "tags": [
    "polygon"
  ]
}

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.

• blockNum: Block number in which the transaction was included.

• contract: Contains details about the NFT contract.

  • address: NFT contract address.

  • name: NFT contract name (null if not available).

  • symbol: NFT contract symbol (null if not available).

• fromAddress: Address from which the NFT was transferred. A zero address (0x0000000000000000000000000000000000000000) typically indicates a minting event.

• toAddress: Address to which the NFT was transferred.

• tokenId: Unique identifier for the NFT within the contract.

• rawLog: Raw log data from the blockchain.

  • topics: Array of indexed log topics.

  • data: Hex-encoded log data (empty in this example).

• type: Transaction type (e.g., "in" for incoming).

• confirm: Boolean indicating whether the transaction is confirmed.

• category: Type of transfer (e.g., ERC721 for NFT transfers).

• 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.