intori-contracts

Compile the contracts

npx hardhat compile

Test the contracts

Measure code coverage

npx hardhat coverage

Run tests

Using the gas reporter:

REPORT_GAS=true npx hardhat test

Running the tests in parallel

npx hardhat test --parallel

Compile the contracts

npx hardhat compile

Deploy the contracts

You can deploy in the localhost network following these steps:

1. Start a local node

npx hardhat node

2. Deploy the Ignition module

npx hardhat ignition deploy ./ignition/modules/CredentialRegistry.ts --network localhost

3. Run an interact script

npm run interact

This runs the script in scripts/interact.ts which has an example code on how the register and verify methods work.

Verify the contracts

When you deploy to a testnet or mainnet, you probably want to verify the contract at the same time for which you can do:

npx hardhat ignition deploy ignition/modules/CredentialRegistry.ts --network base_sepolia --deployment-id base_sepolia_deployment --verify

Hardhat Tasks

Print the list of available accounts

npx hardhat accounts

Contract Info

• CredentialMetadata Struct: Holds information about a registered credential.
• Mappings: Stores issuer-to-credential IDs, recipient DID-to-credential IDs, credential type-to-credential IDs, and issued/received credential counts.
• registerCredential Function:
  • Checks if the credential ID is already registered.
  • Stores the credential metadata.
  • Updates issuer, recipient, and type-based mappings.
  • Emits a CredentialRegistered event.
• Getter Functions:
  • getCredentialsByIssuer: Retrieves credentials issued by a specific address.
  • getCredentialsByRecipient: Retrieves credentials associated with a recipient DID.
  • getCredentialsByType: Retrieves credentials of a specific type.
• verifyCredential Function:
  • Checks if the credential ID exists.
  • Uses verifyEvmDid for Ethereum-based DIDs (optional for other DID methods).
  • Emits a CredentialVerified event if the signature is valid.
• verifyEvmDid Function:
  • Extracts the address from the DID (assuming Ethereum DID format).
  • Calculates the message hash as expected by the contract (including the Ethereum Signed Message prefix).
  • Recovers the signer's address using ecrecover.
  • Compares the recovered address with the recipient address and returns it if valid.