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ERC-7964 Crosschain EIP-712 Signatures

DraftERCcreated 2025-06-05requires EIP-712, ERC-1271, ERC-5267

Support EIP-712 signatures for crosschain account operations.

Author: Ernesto García (@ernestognw)

Depends on (3)

Proposals this one names in its requires field.

EIP-712Typed structured data hashing and signingERC-1271Standard Signature Validation Method for ContractsERC-5267Retrieval of EIP-712 domain

What the specification covers

AbstractMotivationSpecificationCrosschain Domain SemanticsMessage Array EncodingStruct HashOn-Chain VerificationWallet DisplayRationaleStandard EIP-712 CompatibilityMain Struct HashArray Encoding vs Merkle TreesOmitting chainId vs using 0Signature Encoding FormatBackwards CompatibilityReference ImplementationCrosschain Intent ExampleMulti-Chain Governance ExampleUnified Account Management ExampleCrossChain Social Recovery ExampleSecurity ConsiderationsCrosschain ReplayAccount ValidationCode and State Differences[EIP-7702](./eip-7702.md) InteractionDomain Upgrade RiskPartial Execution RiskSignature ExpirationWallet Display ConsiderationsCopyright

This proposal declares no Solidity interface, so there is nothing to compute. It may be a core protocol change, a meta proposal, or written in prose only.

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