Track ERC-721 Transfers
How to track ERC-721 transfers with the Webhooks API
In this tutorial, we build upon the previous in which we tracked ERC20 transfers. To monitor NFT transfers, we will utilize the event signature. If you wish to receive a notification every time a Dokyo NFT is transferred, you can use an expression similar to the following:
curl --location 'https://glacier-api.avax.network/v1/webhooks' \
--header 'x-glacier-api-key: <YOUR_API_KEY>' \
--header 'Content-Type: application/json' \
--data '{
"url": "https://webhook.site/961a0d1b-a7ed-42fd-9eab-d7e4c7eb1227",
"chainId": "43114",
"eventType": "address_activity",
"metadata": {
"addresses": ["0x54C800d2331E10467143911aabCa092d68bF4166"],
"includeInternalTxs": false,
"includeLogs": true,
"eventSignatures": [
"0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef"
]
},
"name": "Dokyo NFT",
"description": "Dokyo NFT"
}'Whenever an NFT is transferred you’ll receive a payload like this:
{
"webhookId": "6d1bd383-aa8d-47b5-b793-da6d8a115fde",
"eventType": "address_activity",
"messageId": "6a364b45-47a2-45af-97c3-0ddc2e87ad36",
"event": {
"transaction": {
"blockHash": "0x30da6a8887bf2c26b7921a1501abd6e697529427e4a4f52a9d4fc163a2344b46",
"blockNumber": "42649820",
"from": "0x0000333883f313AD709f583D0A3d2E18a44EF29b",
"gas": "245004",
"gasPrice": "30000000000",
"maxFeePerGas": "30000000000",
"maxPriorityFeePerGas": "30000000000",
"txHash": "0x2f1a9e2b8719536997596d878f21b70f2ce0901287aa3480d923e7ffc68ac3bc",
"txStatus": "1",
"input": "0xafde1b3c0000000000000000000000000…0000000000000000000000000000000000",
"nonce": "898",
"to": "0x398baa6ffc99126671ab6be565856105a6118a40",
"transactionIndex": 0,
"value": "0",
"type": 0,
"chainId": "43114",
"receiptCumulativeGasUsed": "163336",
"receiptGasUsed": "163336",
"receiptEffectiveGasPrice": "30000000000",
"receiptRoot": "0xdf05c214cee5ff908744e13a3b2879fdba01c9c7f95073670cb23ed735126178",
"contractAddress": "0x0000000000000000000000000000000000000000",
"blockTimestamp": 1709930290
},
"logs": [
{
"address": "0xB31f66AA3C1e785363F0875A1B74E27b85FD66c7",
"topic0": "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
"topic1": "0x0000000000000000000000008cdd7a500f21455361cf1c2e01c0525ce92481b2",
"topic2": "0x0000000000000000000000000000333883f313ad709f583d0a3d2e18a44ef29b",
"topic3": null,
"data": "0x000000000000000000000000000000000000000000000001a6c5c6f4f4f6d060",
"transactionIndex": 0,
"logIndex": 0,
"removed": false
},
{
"address": "0x54C800d2331E10467143911aabCa092d68bF4166",
"topic0": "0x8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b925",
"topic1": "0x0000000000000000000000000000333883f313ad709f583d0a3d2e18a44ef29b",
"topic2": "0x0000000000000000000000000000000000000000000000000000000000000000",
"topic3": "0x0000000000000000000000000000000000000000000000000000000000001350",
"data": "0x",
"transactionIndex": 0,
"logIndex": 1,
"removed": false
},
{
"address": "0x54C800d2331E10467143911aabCa092d68bF4166",
"topic0": "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
"topic1": "0x0000000000000000000000000000333883f313ad709f583d0a3d2e18a44ef29b",
"topic2": "0x0000000000000000000000008cdd7a500f21455361cf1c2e01c0525ce92481b2",
"topic3": "0x0000000000000000000000000000000000000000000000000000000000001350",
"data": "0x",
"transactionIndex": 0,
"logIndex": 2,
"removed": false
},
{
"address": "0xB31f66AA3C1e785363F0875A1B74E27b85FD66c7",
"topic0": "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
"topic1": "0x0000000000000000000000008cdd7a500f21455361cf1c2e01c0525ce92481b2",
"topic2": "0x00000000000000000000000087f45335268512cc5593d435e61df4d75b07d2a2",
"topic3": null,
"data": "0x000000000000000000000000000000000000000000000000087498758a04efb0",
"transactionIndex": 0,
"logIndex": 3,
"removed": false
},
{
"address": "0xB31f66AA3C1e785363F0875A1B74E27b85FD66c7",
"topic0": "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
"topic1": "0x0000000000000000000000008cdd7a500f21455361cf1c2e01c0525ce92481b2",
"topic2": "0x000000000000000000000000610512654af4fa883bb727afdff2dd78b65342b7",
"topic3": null,
"data": "0x000000000000000000000000000000000000000000000000021d261d62813bec",
"transactionIndex": 0,
"logIndex": 4,
"removed": false
},
{
"address": "0x398BAa6FFc99126671Ab6be565856105a6118A40",
"topic0": "0x50273fa02273cceea9cf085b42de5c8af60624140168bd71357db833535877af",
"topic1": null,
"topic2": null,
"topic3": null,
"data": "0x0000000000009911a89f400000000000000000000…0000010",
"transactionIndex": 0,
"logIndex": 5,
"removed": false
}
]
}
}Is this guide helpful?