> ## Documentation Index
> Fetch the complete documentation index at: https://developers.circle.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Gateway webhook events

> Reference for Gateway webhook event types, payload schemas, and example notifications.

Gateway sends webhooks for events on registered wallet addresses. All webhooks
use the V2 notification format. The `notificationType` field names the event,
and the `notification` field contains event data.

```json theme={null}
{
  "subscriptionId": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
  "notificationId": "b2c3d4e5-f6a7-8901-bcde-f12345678901",
  "notificationType": "gateway.deposit.finalized",
  "notification": {
    "...": "Event-specific data. Schema varies by notificationType."
  },
  "timestamp": "2026-04-22T12:00:00.000000000Z",
  "version": 2
}
```

## Deposit events

### `gateway.deposit.finalized`

Fires after tokens are deposited into a Gateway Wallet, the onchain transaction
is finalized, and Gateway processes the deposit.

### Payload fields

| Field           | Type   | Description                                                                                               |
| --------------- | ------ | --------------------------------------------------------------------------------------------------------- |
| `id`            | string | Unique notification identifier                                                                            |
| `walletAddress` | string | Registered wallet address that owns the funds.                                                            |
| `domain`        | string | Chain domain identifier (for example, `"0"` for Ethereum)                                                 |
| `env`           | string | Network environment: `"testnet"` or `"mainnet"`                                                           |
| `tokenAddress`  | string | Token contract address                                                                                    |
| `amount`        | string | Transfer amount in decimal format (for example, `"1.000000"` for 1 token)                                 |
| `from`          | string | Address that initiated the onchain deposit. May be the wallet owner or a delegate acting on their behalf. |
| `to`            | string | Destination address                                                                                       |
| `txHash`        | string | Onchain transaction hash                                                                                  |

### Example: `gateway.deposit.finalized`

```json theme={null}
{
  "subscriptionId": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
  "notificationId": "b2c3d4e5-f6a7-8901-bcde-f12345678901",
  "notificationType": "gateway.deposit.finalized",
  "notification": {
    "id": "c3d4e5f6-a7b8-9012-cdef-123456789012",
    "walletAddress": "0xf70da97812cb96acdf810712aa562db8dfa3dbef",
    "domain": "0",
    "env": "mainnet",
    "tokenAddress": "0xaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
    "amount": "1000.000000",
    "from": "0xf70da97812cb96acdf810712aa562db8dfa3dbef",
    "to": "0x19330d10d9cc8751218eaf51e8885d058642e08a",
    "txHash": "0x9a8b7c6d5e4f3a2b1c0d9e8f7a6b5c4d3e2f1a0b9c8d7e6f5a4b3c2d1e0f9a8b"
  },
  "timestamp": "2026-04-22T12:05:00.000000000Z",
  "version": 2
}
```

## Mint events

The `gateway.mint.finalized` and `gateway.mint.forwarded` events share a payload
schema. Mint event payloads include an `attestations` array. Each burn intent in
a transfer maps to one attestation entry. A single transfer can include multiple
burn intents, each with its own recipient and amount.

### `gateway.mint.finalized`

Fires when an attestation is used and tokens are minted on the destination
blockchain. The `wasForwarded` field shows whether the transfer used the
[forwarding service](/gateway/references/forwarding-service).

### `gateway.mint.forwarded`

Fires when a forwarded mint relay is confirmed. This event only occurs for
transfers that use the
[forwarding service](/gateway/references/forwarding-service).

### Payload fields

| Field           | Type    | Description                                                                               |
| --------------- | ------- | ----------------------------------------------------------------------------------------- |
| `transferId`    | string  | Transfer identifier (attestation group ID)                                                |
| `txHash`        | string  | Onchain transaction hash on the destination blockchain                                    |
| `walletAddress` | string  | The depositor that owns the funds on the source chain                                     |
| `domain`        | string  | Blockchain domain identifier for the destination blockchain (for example, `"7"` for Base) |
| `env`           | string  | Network environment: `"testnet"` or `"mainnet"`                                           |
| `tokenAddress`  | string  | Token contract address on the destination blockchain                                      |
| `wasForwarded`  | boolean | Whether the transfer used the forwarding service (`gateway.mint.finalized` only)          |
| `attestations`  | array   | Array of attestation details (see below)                                                  |

**Attestation fields**

| Field              | Type   | Description                                                            |
| ------------------ | ------ | ---------------------------------------------------------------------- |
| `from`             | string | The depositor address that triggered the burn on the source blockchain |
| `to`               | string | Recipient address for this attestation                                 |
| `amount`           | string | Amount in decimal format (for example, `"1.000000"` for 1 token)       |
| `transferSpecHash` | string | Transfer specification hash for this attestation                       |

### Example: `gateway.mint.finalized`

```json theme={null}
{
  "subscriptionId": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
  "notificationId": "f6a7b890-1234-5678-cdef-901234567890",
  "notificationType": "gateway.mint.finalized",
  "notification": {
    "transferId": "a7b89012-3456-7890-abcd-ef1234567890",
    "txHash": "0x1ea922932e2bbefab697b931aa423a6ebe4a683947a5bd105bb38958e52017a5",
    "walletAddress": "0xf70da97812cb96acdf810712aa562db8dfa3dbef",
    "domain": "7",
    "env": "mainnet",
    "tokenAddress": "0xbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb",
    "wasForwarded": false,
    "attestations": [
      {
        "from": "0xf70da97812cb96acdf810712aa562db8dfa3dbef",
        "to": "0x7777777700000000000000000000000000000001",
        "amount": "93516.491888",
        "transferSpecHash": "0x4a5b6c7d8e9f0a1b2c3d4e5f6a7b8c9d0e1f2a3b4c5d6e7f8a9b0c1d2e3f4a5b"
      }
    ]
  },
  "timestamp": "2026-04-22T12:10:00.000000000Z",
  "version": 2
}
```

### Example: `gateway.mint.forwarded`

This event fires only for transfers that use the forwarding service.

```json theme={null}
{
  "subscriptionId": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
  "notificationId": "0a1b2c3d-4e5f-6789-abcd-ef0123456789",
  "notificationType": "gateway.mint.forwarded",
  "notification": {
    "transferId": "b8c90123-4567-8901-abcd-ef2345678901",
    "txHash": "0x2bc033043d5e6f7a8b9c0d1e2f3a4b5c6d7e8f9a0b1c2d3e4f5a6b7c8d9e0f1a",
    "walletAddress": "0xf70da97812cb96acdf810712aa562db8dfa3dbef",
    "domain": "3",
    "env": "mainnet",
    "tokenAddress": "0xcccccccccccccccccccccccccccccccccccccccc",
    "attestations": [
      {
        "from": "0xf70da97812cb96acdf810712aa562db8dfa3dbef",
        "to": "0x8888888800000000000000000000000000000002",
        "amount": "50000.000000",
        "transferSpecHash": "0x5b6c7d8e9f0a1b2c3d4e5f6a7b8c9d0e1f2a3b4c5d6e7f8a9b0c1d2e3f4a5b6c"
      }
    ]
  },
  "timestamp": "2026-04-22T12:15:00.000000000Z",
  "version": 2
}
```