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Fix EIP-712 and EIP-3009 Signature Verification Failures

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On-chain & DeFi advanced 8 min read $0.01 Updated 2026-10-19

Debugging EIP-712 typed data signatures, including EIP-3009 transferWithAuthorization and permit: domain separator fields, chainId and verifying contract, type hash and field order, uint and bytes32 encoding, v/r/s, recovery, smart wallet EIP-1271 and tooling for comparison.

A typed-data signature is rejected as invalid. Check the domain (name, version, chainId, verifyingContract), the type string, field order and value encoding, and the signer address recovery.

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#eip-712#eip-3009#signatures#typed-data#evm

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