{
  "chain": "x402-permit2-spend-evidence",
  "question": "A payer sent me a Permit2 authorization for an x402 charge. Did the key I think owns that wallet actually sign these exact terms?",
  "look_at": "art-591-x402-signer-recovery-verifier.recovered_signer_matches_claimed_from",
  "try_changing": {
    "step": "art-591-x402-signer-recovery-verifier",
    "field": "claimedFrom",
    "value_note": "any other twenty byte address, which breaks the claimed payer match"
  }
}