EAS MetaMask Snap

The EAS MetaMask Snap enhances the transparency and security of EAS attestations signed with your MetaMask. It decodes attestation data, allowing users to clearly understand and verify the details before confirming a transaction.

Why It Matters

When signing attestations with MetaMask, the data often appears in a hexadecimal format, which is not human-readable. The EAS Snap converts this data into a clear, readable format. This ensures you're fully aware of the attestation's details, mitigating the risk of unintentional or malicious signings.

Key Features

• Attestation Decoding: Utilizes SchemaEncoder from the @ethereum-attestation-service/eas-sdk to decode attestation data, presenting it in a readable format.
• Transaction Data Parsing: The snap parses Ethereum transaction data to identify if it is related to an EAS attestation, using ethers library.
• Dynamic Content Rendering: It dynamically renders transaction details in the MetaMask UI, including schema, recipient, reference UID, expiration time, and revocability status, offering users a complete overview of the attestation they are about to sign.
• Time Formatting: Utilizes dayjs with extended formats to display expiration times in a user-friendly manner.
• GraphQL Integration: Communicates with EAS's GraphQL endpoint to fetch and display the schema associated with the attestation.
• Data Decoding and Display: Decodes and displays each piece of attestation data using the fetched schema, allowing users to understand the specifics of what they are attesting.

Demo Video

This is a short demo video showing how the Snap works. Notice the hex value of the data first, then how the data is more readable when the 'EAS' snap is clicked.

Example

Before Snap:

Signing an attestation in MetaMask shows data in hexadecimal format, leaving you unsure of what you're agreeing to.

After Snap:

The same data is displayed clearly, with details like recipient, revocability, and schema easily understandable.