Research on EIP 1812 (Ethereum Verifiable Claims)

[Vishwas1]

• Prerequisite: #44
• https://eips.ethereum.org/EIPS/eip-1812
• https://ethereum-magicians.org/t/erc-1812-ethereum-verifiable-claims/2814

[Vishwas1]

Abstract

• A new method of off-chain Verifiable Claims built on EIP-712 #44
• Claims can be issued by any user with EIP 712 compatible web3 provider.
• Claims can be stored OFF chain and verified ON chain by smart contract.

Motivation

Reusable Off-Chain Verifiable Claims provide an important piece of integrating smart contracts with real world organizational requirements such as meeting regulatory requirements such as KYC, GDPR, Accredited Investor rules etc.

Claims should not kept on-chain sine in most cases it is both dangerous and in some cases its illegal (as per GDPR) to record identity claims containing PII on immutable ledger.

This format allows reusable off-chain Verifiable Claims to be cheaply issued to users, who can present them when needed.

Spec

What are claims?

Issuers makes the claim that Subject is something or has some attribute and value

Bare minimum claim

struct [CLAIM TYPE] {
    address subject;
    uint256 validFrom;
    uint256 validTo;
}