Builds the Authorization: Payment … value for a challenge.
Authorization: Payment …
Key order in the JSON is irrelevant — the server parses it — but the two base64url strings are emitted untouched, which is what keeps the HMAC valid.
Builds the
Authorization: Payment …value for a challenge.Key order in the JSON is irrelevant — the server parses it — but the two base64url strings are emitted untouched, which is what keeps the HMAC valid.