feat: add use-refund-protocol skill#32
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Adds a new skill for integrating the Circle Refund Protocol on Arc — a non-custodial escrow system for USDC payment disputes and chargebacks. Covers: - Full payment lifecycle: pay(), withdraw(), refundByRecipient(), refundByArbiter(), earlyWithdrawByArbiter() - Arbiter setup: setLockupSeconds(), depositArbiterFunds(), settleDebt() - 8 implementation patterns with TypeScript (viem/wagmi) + Solidity signatures - 7 antipatterns (AP1–AP7) including the known earlyWithdrawByArbiter drain vulnerability, documented with an explicit security warning - Decision guide, use cases (merchant, gig economy, agent-validated escrow), and alternatives
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Summary
Adds a new skill for integrating the Circle Refund Protocol — a non-custodial escrow system for USDC payment disputes and chargebacks on Arc.
What's included
pay(),withdraw(), all three refund paths (refundByRecipient,refundByArbiter,earlyWithdrawByArbiter),updateRefundTo, and debt settlementearlyWithdrawByArbiterdrain vulnerability documented in the refund-protocol READMEuse-gateway,bridge-stablecoin, and direct transfer when escrow isn't neededSecurity note
The
earlyWithdrawByArbitervulnerability acknowledged in the circlefin/refund-protocol README is documented in both the skill body (Refund Path C section) and Antipattern AP7, with an explicit warning not to use it in production until Circle publishes a fix.Related
use-refund-protocol#11