EAS

Starting today, you can use Once Upon to read onchain EAS attestations.

Ethereum Attestation Service (EAS) is infrastructure for making attestations onchain or offchain about identity, asset ownership, reputation, etc. with cryptographic proofs.

You can learn more about EAS here.

As of now, EAS is deployed on Ethereum, Arbitrum, Optimism, Base and Linea.

For OP Stack (Optimism) chains, EAS has the same contract address. This makes it easy to see all EAS activity across many chains for any account.

The two contract addresses on OP Stack chains are:

• EAS: 0x4200000000000000000000000000000000000021

• Schema Registry: 0x4200000000000000000000000000000000000020

Coinbase uses EAS on Base to attest to accounts being verified Coinbase users as well as their country of residence.

Additionally, Farcaster uses EAS to attest to new user signups via Coinbase Wallet.

This EAS feature is powered by the open-source EVM Context library. Thanks to datadanne.eth for completing the bounty to add support for EAS!