x402 0.3.0

Unified package for the x402 protocol with support for multiple blockchains.

0.3.0

• Breaking Change: Transitioned from String-based network identifiers to a dedicated, CAIP-2 compliant Network class hierarchy across all packages.
• Breaking Change: Introduced EvmNetwork and SolanaNetwork for chain-specific identifier handling.
• Breaking Change: Introduced SolanaCluster for easy configuration of Solana environments (Mainnet, Devnet, Testnet).
• New Feature: Added X402ResourceServer to x402_core as a framework-agnostic component for protecting resources and verifying payments.
• New Feature: Added ExactEvmSchemeServer and ExactSvmSchemeServer for verifying EIP-3009 (USDC) and SPL Token payments.
• New Feature: Added SettleResponse and VerifyResponse models for reporting payment results back to clients via the x402-payment-response header.
• Enhancement: Added PaymentRequiredResponse.fromHeader and findFirstSupportedBy to simplify client-side requirement parsing.
• Enhancement: Improved X402Exception with better error reporting and originalError context.
• Internal: Major directory restructuring in x402_core to better organize protocol logic.
• Testing: Completely revamped end-to-end testing suite using npm-based facilitator and server packages.
• Testing: Significantly expanded unit test coverage for models, schemes, and server-side logic.

0.2.0

• Version bump to synchronize with core and blockchain-specific packages.
• Updated internal dependencies to version 0.2.0.

0.1.0

• Initial release of the main x402 client-side package.
• Provides a unified entry point for both EVM and SVM implementations.
• Features X402Client for automated 402 Payment Required handshake and retry logic.
• Exports core protocol logic and multi-chain signers (EVM and SVM).