IMPLEMENTATION_PLAN.md

Stage 1: SDK SIWS support

Goal: Authenticate Solana x402 drawdown sessions and settle Solana credit offers. Success criteria: SDK tests cover SIWS construction, Base58 signatures, authentication, and Solana credit settlement. Status: Complete

Stage 2: Local SDK integration

Goal: Run the CLI against the local SDK implementation. Success criteria: Cargo resolves quicknode-sdk from ../sdk/crates/core with all payment features enabled. Status: Complete

Stage 3: CLI behavior and documentation

Goal: Expose Solana drawdown through CLI help, examples, and command handling. Success criteria: Solana buy-credit and drawdown integration tests pass without changing EVM behavior. Status: Complete

Stage 4: Verification

Goal: Validate both repositories with formatting, tests, clippy, and builds. Success criteria: Required checks pass with no new warnings. Status: Complete

Stage 5: Faucet compatibility and Arc Testnet

Goal: Support both asynchronous Circle transfer responses and direct Arc Testnet transaction responses from qn rpc x402 drip. Success criteria: Arc network and USDC resolution work, both response shapes render correctly, and the CLI passes all verification checks against the local SDK. Status: In Progress