WebhookEvent

Outbound webhook payload. Shape is
{ event_id, type, timestamp, data: PaymentResponse }. The
data block matches the response of GET /payments/{id}, so
reconciliation is a straight key-by-key compare.

{
    "type": "payment_payin_completed",
    "data": {
        "id": "550e8400-e29b-41d4-a716-446655440000",
        "appId": "string",
        "orderId": "string",
        "errorCode": "string",
        "errorMessage": "string",
        "createdAt": "2019-08-24T14:15:22.123Z",
        "updatedAt": "2019-08-24T14:15:22.123Z",
        "expiresAt": "2019-08-24T14:15:22.123Z",
        "webhookSecret": "string",
        "metadata": {},
        "status": "payment_unpaid",
        "type": "exactIn",
        "display": {
            "title": "string",
            "description": "string",
            "currency": "string"
        },
        "destination": {
            "chainId": "string",
            "receiverAddress": "string",
            "receiverMemo": "string",
            "tokenSymbol": "string",
            "tokenAddress": "string",
            "amount": "string",
            "txHash": "string",
            "confirmedAt": "2019-08-24T14:15:22.123Z"
        },
        "source": {
            "chainId": "string",
            "tokenSymbol": "string",
            "tokenAddress": "string",
            "amount": "string",
            "receiverAddress": "string",
            "receiverMemo": "string",
            "fee": "string",
            "senderAddress": "string",
            "txHash": "string",
            "amountReceived": "string",
            "confirmedAt": "2019-08-24T14:15:22.123Z"
        }
    },
    "event_id": "a7a26ff2-e851-45b6-9634-d595f45458b7",
    "timestamp": "2019-08-24T14:15:22.123Z"
}