Webhook events notify your application when specific actions occur in your 1Money account. Your endpoint must respond with a 2xx status code within 10 seconds.

HTTP Headers

All webhook requests include the following headers:

Header	Description	Example
`Content-Type`	Request content type	`application/json`
`X-Webhook-Signature`	HMAC-SHA256 signature	`a1b2c3d4e5f6...` (64 chars)
`X-Webhook-Timestamp`	Unix timestamp (seconds)	`1705920000`
`X-Webhook-Event-Id`	Unique event ID	`12345`
`X-Webhook-Event-Name`	Event type	`deposit.completed`
`X-Webhook-Delivery-Id`	Delivery attempt ID	`67890`

Signature Verification

To verify webhook authenticity, compute the HMAC-SHA256 signature and compare it with X-Webhook-Signature.

Algorithm

signed_payload = "{timestamp}.{request_body}"
expected_signature = HMAC-SHA256(signed_payload, webhook_secret)

Verification Steps

Extract X-Webhook-Signature and X-Webhook-Timestamp from headers
Concatenate: {timestamp}.{raw_request_body}
Compute HMAC-SHA256 using your webhook secret
Compare signatures using constant-time comparison
Reject if timestamp is older than 5 minutes (replay attack prevention)

Code Example (Node.js)

const crypto = require('crypto');

function verifyWebhookSignature(payload, signature, timestamp, secret) {
  // Check timestamp (5 minute tolerance)
  const now = Math.floor(Date.now() / 1000);
  if (Math.abs(now - timestamp) > 300) {
    return false;
  }

  // Compute expected signature
  const signedPayload = `${timestamp}.${payload}`;
  const expectedSignature = crypto
    .createHmac('sha256', secret)
    .update(signedPayload)
    .digest('hex');

  // Constant-time comparison
  return crypto.timingSafeEqual(
    Buffer.from(signature),
    Buffer.from(expectedSignature)
  );
}

Code Example (Python)

import hmac
import hashlib
import time

def verify_webhook_signature(payload: str, signature: str, timestamp: int, secret: str) -> bool:
    # Check timestamp (5 minute tolerance)
    now = int(time.time())
    if abs(now - timestamp) > 300:
        return False

    # Compute expected signature
    signed_payload = f"{timestamp}.{payload}"
    expected_signature = hmac.new(
        secret.encode(),
        signed_payload.encode(),
        hashlib.sha256
    ).hexdigest()

    # Constant-time comparison
    return hmac.compare_digest(signature, expected_signature)

Payload Structure

All webhook payloads follow this structure:

{
  "event_name": "event.type",
  "resource": {
    "type": "resource_type",
    "id": "resource_id"
  },
  "data": {
    // Event-specific data
  }
}

Event Types Summary

Category	Event Name	Status
Customers	`kyb.pending`	PENDING
	`kyb.additional_info_required`	PENDING_RESPONSE
	`kyb.completed`	APPROVED
	`kyb.rejected`	REJECTED
Fiat Account	`fiat_account.activated`	ACTIVATED
Deposits	`deposit.completed`	COMPLETED
	`deposit.failed`	FAILED
	`deposit.reversed`	REVERSED
Withdrawals	`withdrawal.completed`	COMPLETED
	`withdrawal.failed`	FAILED
	`withdrawal.returned`	RETURNED
Conversions	`conversion.completed`	COMPLETED
	`conversion.failed`	FAILED
External Accounts	`external_account.approved`	APPROVED
	`external_account.failed`	FAILED
Recipients	`recipient.approved`	APPROVED
	`recipient.rejected`	REJECTED
Transfers	`transfer.completed`	COMPLETED
Auto-Conversion Rules	`auto_conversion_rule.create`	SUCCESS, FAILED
	`auto_conversion_rule_order.completed`	COMPLETED
	`auto_conversion_rule_order.deposit_failed`	FAILED
	`auto_conversion_rule_order.conversion_failed`	FAILED
	`auto_conversion_rule_order.withdrawal_failed`	FAILED

Retry Policy

If your endpoint does not respond with a 2xx status code, we will retry the webhook delivery:

Retry	Delay
1st	~30 minutes
2nd	~1 hour
3rd	~2 hours
4th	~4 hours
5th	~8 hours

After 5 failed attempts (approximately 15.5 hours total), the webhook is marked as permanently failed

Best Practices

Respond quickly - Return 200 OK immediately, process asynchronously
Verify signatures - Always validate X-Webhook-Signature before processing
Handle duplicates - Use X-Webhook-Event-Id for idempotency
Use HTTPS - Webhook endpoints must use HTTPS
Log deliveries - Track X-Webhook-Delivery-Id for debugging