x402_core 0.3.0

Core protocol definitions and shared logic for the x402 protocol, providing blockchain-agnostic interfaces and data structures.

0.3.0

• Breaking Change: Changed network from String to a dedicated Network class (CAIP-2 compliant).
• Added X402ResourceServer as a framework-agnostic component for protecting resources and verifying payments.
• Added SettleResponse and VerifyResponse models for payment verification and settlement reporting.
• Added PaymentRequiredResponse.fromHeader and findFirstSupportedBy.
• Removed code from X402Exception, include originalError in toString().
• Restructured internal directory, moving core logic into sub-directories.
• Completely revamped e2e tests using npm packages for facilitator and server.
• Significantly expanded test coverage with unit tests for models and server logic.

0.2.0

• Breaking Change: X402Signer.sign now returns Future<SignedPayment> instead of Future<String>.
• Added SignedPayment class to wrap the base64-encoded payment payload.
• Added PaymentRequirement.fromHeader factory constructor.
• Added extensions field to PaymentPayload.
• X402Client now includes loop protection to prevent infinite retries.
• X402Client no longer drains the response stream when returning the original response, fixing issues with non-streaming requests.
• Updated X402Exception.toString to include error code if present.

0.1.0

• Initial release of the x402 core protocol definitions and shared logic.
• Defined base interfaces for X402Signer and SchemeClient.
• Implemented core models: PaymentPayload, PaymentRequirement, PaymentRequiredResponse, and ResourceInfo.
• Added X402Client for automated 402 Payment Required handling.