EIP-712: How to Verify Typed Data On Chain
Implementing EIP-712: Typed structured data hashing and signing
EIP-712: How to Verify Typed Data On Chain
Implementing EIP-712: Typed structured data hashing and signing
Overview
The idea of EIP-712 is to standardize hashing and signing of typed structured data as instead to just byte strings. Below are the different ways of signing
- Signing a transaction
- Signing a message (hexadecimal string).
- Signing typed data
Signing typed data allows the user to view human readable data before confirming instead of an arbitrary hexadecimal string.
Copy trading bots from the top traders. Try it for FREE.
Demo
https://leon-do.github.io/eip712-generator/
Signing
[embed]
The message params are divided into:
Domain: The below values are hashed to prevent others dapp from using the same signature.
name: Name of the dappversion: Version of the dappchainId: To prevent replay attacksverifyingContract: Address of the contract that will verify the signature
Message: The typed data (JSON) to sign. In the above example, the data is { "myValue": 123 }
Primary Type: Represents the top-level type of the object
Types: Defines all of the types
Verifying
[embed]
The smart contract function is divided into:
Defining types to match the signing (javascript) code.
Hashing the domain separator and the values.
Splitting the signature to r , s , v
ECRecover to verify the signature
Join Coinmonks Telegram Channel and Youtube Channel learn about crypto trading and investing
Also, Read
메타데이터
- post_id
- 4ea16548a45f
- slug
- eip-712-how-to-verify-typed-data-on-chain-4ea16548a45f
- url
- https://medium.com/coinmonks/eip-712-how-to-verify-typed-data-on-chain-4ea16548a45f
- canonical_url
- https://medium.com/coinmonks/eip-712-how-to-verify-typed-data-on-chain-4ea16548a45f
- author_url
- https://medium.com/@leondo
- status
- ok
- fetched_at
- 2026-06-29 22:44:20
