@ethereum-attestation-service/eas-contracts
Advanced tools
The Ethereum Attestation Service is a free and open protocol for on-chain attestations on EVM compatible blockchains. It is a generalized service that allows anyone to register a schema for their particular use case, and then make attestations following their schema.
Schemas can be registered using the SchemaRegistry.sol contract, and attestations are made using the EAS.sol contract.
In addition, we provide a resolver contract for advanced use cases, such as on-chain verification of attestation data, and also attaching payments to attestations (which makes a new suite of powerful web3 applications possible).
We also provide an SDK for developers.
On-chain attestations will enable a powerful new range of web3 applications, including:
Please note that you can also import and use the addresses directly in your code using the @ethereum-attestation-service/eas-contracts/deployments deployment artifacts corresponding to your desired network.
Version 0.26:
Version 1.0.1:
Version 1.2.0:
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Version 1.2.0:
Version 0.26:
Version 1.3.0:
Version 1.3.0:
Version 1.3.0:
Version 1.3.0:
Version 1.3.0:
Version 1.3.0:
Version 1.2.0:
Version 0.26:
Version 1.2.0:
Version 1.0.2:
Version 1.3.0:
Version 1.0.1:
Version 1.2.0:
Version 1.2.0:
Version 1.3.0:
Version 1.0.1:
Version 1.2.0:
Version 1.1.0:
Version 1.3.0:
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pnpm add @ethereum-attestation-service/eas-contracts
Testing the protocol is possible via multiple approaches:
You can run the full test suite via:
pnpm test
----------------------------------|----------|----------|----------|----------|----------------|
File | % Stmts | % Branch | % Funcs | % Lines |Uncovered Lines |
----------------------------------|----------|----------|----------|----------|----------------|
contracts/ | 100 | 100 | 100 | 100 | |
Common.sol | 100 | 100 | 100 | 100 | |
EAS.sol | 100 | 100 | 100 | 100 | |
IEAS.sol | 100 | 100 | 100 | 100 | |
ISchemaRegistry.sol | 100 | 100 | 100 | 100 | |
Indexer.sol | 100 | 100 | 100 | 100 | |
SchemaRegistry.sol | 100 | 100 | 100 | 100 | |
Semver.sol | 100 | 100 | 100 | 100 | |
contracts/eip1271/ | 100 | 100 | 100 | 100 | |
EIP1271Verifier.sol | 100 | 100 | 100 | 100 | |
contracts/eip712/proxy/ | 100 | 100 | 100 | 100 | |
EIP712Proxy.sol | 100 | 100 | 100 | 100 | |
contracts/eip712/proxy/examples/ | 100 | 100 | 100 | 100 | |
PermissionedEIP712Proxy.sol | 100 | 100 | 100 | 100 | |
contracts/resolver/ | 100 | 100 | 100 | 100 | |
ISchemaResolver.sol | 100 | 100 | 100 | 100 | |
SchemaResolver.sol | 100 | 100 | 100 | 100 | |
contracts/resolver/examples/ | 100 | 100 | 100 | 100 | |
AttestationResolver.sol | 100 | 100 | 100 | 100 | |
AttesterResolver.sol | 100 | 100 | 100 | 100 | |
DataResolver.sol | 100 | 100 | 100 | 100 | |
ExpirationTimeResolver.sol | 100 | 100 | 100 | 100 | |
PayingResolver.sol | 100 | 100 | 100 | 100 | |
RecipientResolver.sol | 100 | 100 | 100 | 100 | |
RevocationResolver.sol | 100 | 100 | 100 | 100 | |
TokenResolver.sol | 100 | 100 | 100 | 100 | |
ValueResolver.sol | 100 | 100 | 100 | 100 | |
----------------------------------|----------|----------|----------|----------|----------------|
All files | 100 | 100 | 100 | 100 | |
----------------------------------|----------|----------|----------|----------|----------------|
In order to audit the test coverage of the full test suite, run:
pnpm test:coverage
You can profile the gas costs of all of the user-focused flows via:
pnpm test:profile
The contracts have built-in support for deployments on different chains and mainnet forks. You can deploy the project by:
pnpm deploy
There’s also a special deployment mode which deploys the protocol to a mainnet fork, with additional goodies. It can be run via:
pnpm deploy:fork
The framework was inspired and adopted from Bancor V3.
EAS is open source and distributed under the MIT License (see LICENSE).
FAQs
Ethereum Attestation Service
The npm package @ethereum-attestation-service/eas-contracts receives a total of 555 weekly downloads. As such, @ethereum-attestation-service/eas-contracts popularity was classified as not popular.
We found that @ethereum-attestation-service/eas-contracts demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 1 open source maintainer collaborating on the project.
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