Wallet signature proof created
A signature proof was created with a segregated wallet (POST /v1/segregated-wallets/{walletID}/signatures). The wallet signed a message with the chain-native standard (EIP-191 for ETH/EVM, TIP-191 for TRON) inside the anti-phishing CBPay Signature Proof envelope. The proof can be verified publicly at verify_url (no auth).
Every delivery includes X-Webhook-Event, X-Webhook-Event-ID, X-Webhook-Delivery-ID, X-Webhook-Timestamp and X-Webhook-Signature = hex(HMAC-SHA256(secret, timestamp + "." + body)). Respond 2xx; up to 5 attempts with incremental backoff.
Authorizations
Session JWT (from register/login) or API key (pk_...).
X-API-Key: <token> is accepted as an alternative header.
Body
Response
Return any 2xx to acknowledge the delivery.