Caisse

Donner l’adresse d’envoi (navigateur)

POST/checkout/{id}/crypto/sender

37 (Figma 673:10): on chains where one address receives every payment (Ethereum, BNB, Polygon, Tron and their tokens), Bitcart recognises the buyer's payment by the address it comes from, given once while the invoice waits. 400 invalid_sender for an address of another chain or an invoice no longer waiting. Requires the HttpOnly cookie bound to this checkout ID, acquired by the one-use launch form. Merchant sessions and API keys do not grant buyer authority. Cookie names are per-session and cannot be templated by an OpenAPI security scheme.