Claiming and Signing Credential

Step 1: Import Required Modules

Import the necessary modules at the beginning of your script:

import { Credential, DIDAccount } from "@didpass/issuer-sdk";
import { QRTypes } from "@didpass/issuer-sdk/lib/types/QRTypes";

Step 2: Set Up Credential Payload

Replace the placeholder values with your actual Credential payload:

// this is the payload sent by wallet
const credentialPayload = {
  credentialId: "YOUR_CREDENTIAL_ID",
  did: "USER_DID",
  qrType: QRTypes.TYPE_CREDENTIAL_VC,
  message: "MESSAGE_FROM_WALLET",
  signature: "SIGNATURE_FROM_WALLET",
};

Step 3: Set Up Credential Details

Replace the placeholder values with your actual credential details:

const credentialSubject = {
  // Replace with user's credential subject data for VC (based on credentialId)
};

const type = "YOUR_CREDENTIAL_TYPE"; // ex: KtpCred
const validFrom = "VALID_FROM_DATE"; // Optional
const validUntil = "VALID_UNTIL_DATE"; // Optional

Step 4: Claim and Sign Credential

Claim and sign the credential using the provided payload and details:

const privateKey = "YOUR_ISSUER_PRIVATE_KEY";
const account = new DIDAccount(privateKey);

const credential = new Credential();

const issuanceDetails = {
  issuer: account,
  metadata: {
    id: uuidv4(),
    credentialType: type,
    receiverDID: credentialPayload.did,
    validFrom: validFrom, // Optional
    validUntil: validUntil, // Optional
  },
  credentialSubject: credentialSubject,
};

const verifiableCredential = await credential.signCredential(
  issuanceDetails,
  credentialPayload.message,
  credentialPayload.signature
);

Step 5: Return Signed Credential

Return the signed credential:

return verifiableCredential;

Final Code

Here's the complete code:

import { Credential, DIDAccount } from "@didpass/issuer-sdk";
import { QRTypes } from "@didpass/issuer-sdk/lib/types/QRTypes";

async function claimCredential() {
  // Set up credential payload, this is sent by wallet
  const credentialPayload = {
    credentialId: "YOUR_CREDENTIAL_ID",
    did: "USER_DID",
    qrType: QRTypes.TYPE_CREDENTIAL_VC,
    message: "MESSAGE_FROM_WALLET",
    signature: "SIGNATURE_FROM_WALLET",
  };

  // Set up credential details
  const credentialSubject = {
    // Replace with user's credential subject data for VC (based on credentialId)
  };

  const type = "YOUR_CREDENTIAL_TYPE"; // ex: KtpCred
  const validFrom = "VALID_FROM_DATE"; // Optional
  const validUntil = "VALID_UNTIL_DATE"; // Optional

  // Claim and sign credential
  const privateKey = "YOUR_ISSUER_PRIVATE_KEY";
  const account = new DIDAccount(privateKey);
  const credential = new Credential();
  const issuanceDetails = {
    issuer: account,
    metadata: {
      id: uuidv4(),
      credentialType: type,
      receiverDID: credentialPayload.did,
      validFrom: validFrom, // Optional
      validUntil: validUntil, // Optional
    },
    credentialSubject: credentialSubject,
  };

  const verifiableCredential = await credential.signCredential(
    issuanceDetails,
    credentialPayload.message,
    credentialPayload.signature
  );

  // Return signed credential
  return verifiableCredential;
}