Alchemy Transfers Api Asset Transfer Structure

{
  "$schema": "https://json-structure.org/meta/core/v0/#",
  "$id": "https://raw.githubusercontent.com/api-evangelist/alchemy/refs/heads/main/json-structure/alchemy-transfers-api-asset-transfer-structure.json",
  "name": "Asset Transfer",
  "description": "Represents a single asset transfer event on the blockchain.",
  "type": "object",
  "properties": {
    "blockNum": {
      "type": "string",
      "description": "Block number of the transfer in hexadecimal.",
      "example": "0xfda53c"
    },
    "hash": {
      "type": "string",
      "description": "Transaction hash of the transfer.",
      "example": "0xabc123def456abc123def456abc123def456"
    },
    "from": {
      "type": "string",
      "description": "Sender wallet address.",
      "example": "0x0000000000000000000000000000000000000000"
    },
    "to": {
      "type": "string",
      "description": "Recipient wallet address.",
      "example": "0xd8da6bf26964af9d7eed9e03e53415d37aa96045"
    },
    "value": {
      "type": "double",
      "description": "Transfer value in native units.",
      "example": 1.0
    },
    "asset": {
      "type": "string",
      "description": "Asset symbol (e.g., ETH, USDC, or NFT collection name).",
      "example": "ETH"
    },
    "category": {
      "type": "string",
      "description": "Transfer category (external, internal, erc20, erc721, erc1155).",
      "enum": [
        "external",
        "internal",
        "erc20",
        "erc721",
        "erc1155"
      ],
      "example": "external"
    },
    "metadata": {
      "type": "object",
      "name": "Transfer Metadata",
      "description": "Additional metadata for an asset transfer.",
      "properties": {
        "blockTimestamp": {
          "type": "datetime",
          "description": "ISO 8601 timestamp of the block.",
          "example": "2026-04-19T10:00:00Z"
        }
      }
    }
  }
}