feat(x402): payment middleware pipeline and two-phase approval flow#87
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zhongeric wants to merge 1 commit intoConway-Research:mainfrom
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feat(x402): payment middleware pipeline and two-phase approval flow#87zhongeric wants to merge 1 commit intoConway-Research:mainfrom
zhongeric wants to merge 1 commit intoConway-Research:mainfrom
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x402Fetch previously auto-signed any 402 payment without agent evaluation. This introduces a middleware pipeline and a two-phase tool flow so the agent reasons about each payment before committing funds: - Phase 1 (discover): x402_fetch returns payment details without signing - Phase 2 (pay): x402_fetch with approve_payment: true runs middleware, signs, and logs the transaction Also adds PaymentMiddleware/PaymentContext types, x402_payment transaction type, 11 new tests, and README documentation. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Summary
x402_fetchtool: Phase 1 discovers payment details (amount, recipient, network, wallet balance) without signing. Phase 2 (approve_payment: true) runs the middleware chain, signs the USDC payment, and logs the transaction — giving the agent a reasoning turn before committing funds.PaymentMiddleware[]runs before every signing attempt. Phase 1 uses a blocking middleware to force the early return. Phase 2 runs with an empty chain, open for future additions (balance checks, rate limits, allowlists) without changingx402Fetch.x402_paymenttransactions with amount and description, following the existingtransfer_creditspattern.Changes
src/types.ts"x402_payment"toTransactionTypeunionsrc/conway/x402.tsPaymentRequirement/X402PaymentResult; addedPaymentContext,PaymentMiddleware,X402FetchOptionstypes; refactoredx402Fetchwith middleware pipeline and backward-compatible signaturesrc/agent/tools.tsx402_fetchtool withapprove_paymentparameter, two-phase handler, and transaction loggingsrc/__tests__/x402.test.tsREADME.mdTest plan
pnpm build— clean compilationpnpm test— 21/21 tests pass (11 new x402 tests + 10 existing)x402_fetchagainst an x402-gated URL, confirm Phase 1 returns payment details without signingx402_fetchwithapprove_payment: true, confirm payment is signed and response is returned🤖 Generated with Claude Code