Module headers 

HTTP header encoding and decoding for x402 protocol messages.

Handles Base64-encoded JSON payloads in PAYMENT-SIGNATURE, PAYMENT-REQUIRED, PAYMENT-RESPONSE, and legacy X-PAYMENT headers.

Corresponds to Python SDK’s http/x402_http_client_base.py.

Functions

decode_payment_payload

Decodes a PAYMENT-SIGNATURE or X-PAYMENT header value into a version-tagged payload enum.

decode_payment_required

Decodes a PAYMENT-REQUIRED header value into a version-tagged enum.

decode_payment_response

Decodes a PAYMENT-RESPONSE header value into a SettleResponse.

encode_payment_required

Encodes a PaymentRequired (V2) as a Base64 string for the PAYMENT-REQUIRED header.

encode_payment_required_v1

Encodes a PaymentRequiredV1 as a Base64 string for the PAYMENT-REQUIRED header (V1).

encode_payment_response

Encodes a SettleResponse as a Base64 string for the PAYMENT-RESPONSE header.

encode_payment_signature

Encodes a V2 PaymentPayload as a Base64 string for the PAYMENT-SIGNATURE header.

encode_x_payment

Encodes a V1 PaymentPayloadV1 as a Base64 string for the X-PAYMENT header.