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eip712-signing

Automate EIP-712 typed data signing for Ethereum smart contracts.

120|12|Updated Apr 10, 2026
Search Tags:#hashing#signing#gasless#permit#eip712#typed-data#domain-separator
One-click install
npx skills add https://github.com/ccashwell/evm-cortex --skill eip712-signing-ccashwell
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: eip712-signing
Source: https://github.com/ccashwell/evm-cortex/tree/main/skills/eip712-signing
Command: npx skills add https://github.com/ccashwell/evm-cortex --skill eip712-signing-ccashwell

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

EIP-712 signing provides clear, user-readable signatures for structured data, preventing ambiguity and replay risks in Ethereum messages.

Core Features & Use Cases

  • Domain separator and type hashing for robust structured data signing
  • Encoding rules and fork-aware DOMAIN_SEPARATOR caching to handle chainID changes
  • Support for EIP-2612 permit flows and gasless transactions in dApps
  • Practical examples and patterns for wallets, governance, and meta-transactions

Quick Start

Sign a typed data payload using a domain separator and type hashes to produce a verifiable signature.

Frequently Asked Questions about eip712-signing

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I implement EIP-712 typed data signing for Ethereum smart contracts?▼

EIP-712 typed data signing is automated by applying domain separation, type hashing, and proper encoding rules for nested structs to produce verifiable signatures for Ethereum smart contracts. It handles domain separators and type hashes for structured data signing.

Why does my EIP-712 domain separator break after a chain ID fork?▼

EIP-712 domain separators break during chain ID forks due to improper caching. This skill handles chain ID fork changes by applying fork-aware DOMAIN_SEPARATOR caching, ensuring signatures remain valid and preventing replay risks across networks.

Can I use EIP-712 signing to build gasless transactions and EIP-2612 permit flows?▼

Yes, EIP-712 signing supports EIP-2612 permit flows and gasless transactions in dApps. It provides the structured data encoding and domain separation required to securely execute meta-transactions without requiring users to pay gas directly.

What is the best way to handle domain separation for governance and meta-transactions?▼

The best way to handle domain separation for governance and meta-transactions is using EIP-712 structured data signing. It provides clear, user-readable signatures, preventing ambiguity and replay risks while supporting wallet and dApp integration patterns.

Does EIP-712 signing support encoding rules for nested structs in Ethereum dApps?▼

EIP-712 signing supports encoding rules for nested structs in Ethereum dApps. It applies correct encoding standards to complex structured data, ensuring that typed data payloads are securely hashed and signed without ambiguity.

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