Add x402-approval-guard example app#302
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Merged via #377 — thanks for contributing! |
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A small, forkable x402 consumer example: before an agent signs an ERC20
approve(), it calls contract-guard (x402-fetch + viem, $0.005 USDC on Base) viacheck_approvalto detect unlimited/risky allowances and block the signature. Demonstrates gating an on-chain agent action on a pay-per-use x402 check. MIT.