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Coinbase Offchain Resolver

Client                             Offchain Resolver Contract          Gateway
  |                    resolve(dnsname, lookup) |                         |
  |-------------------------------------------->|                         |
  |                                             |                         |
  | error: OffchainLookup(addr, url, data, ...) |                         |
  |<--------------------------------------------|                         |
  |                                             |                         |
  |                                             |      GET /{addr}/{data} |
  |---------------------------------------------------------------------->|
  |                                             |                         |
  | response: (result, expires, sig)            |                         |
  |<----------------------------------------------------------------------|
  |                                             |                         |
  |            resolveWithProof(response, data) |                         |
  |-------------------------------------------->|                         |
  |                                             |                         |
  | result (or an error if invalid)             |                         |
  |<--------------------------------------------|                         |
  |                                             |                         |

Please refer to the tests for .resolve and .resolveWithProof in CoinbaseResolver.test.ts to learn more about how this works.

Requirements

  • Node.js v16
  • Yarn v1.22.x

Usage

Install dependencies

$ yarn install

Compile

Compile the smart contracts with Hardhat:

$ yarn compile

TypeChain

Compile the smart contracts and generate TypeChain artifacts:

$ yarn typechain

Format

$ yarn prettier

Lint

$ yarn lint

Test

$ yarn test

Test Coverage

Ensure test coverage is at 100%

$ yarn coverage

$ open coverage/index.html

Deployment

$ yarn deploy --network <NETWORK>