MATTR VII Quick Start

mattr-vii-quick-start.js

const axios = require("axios");

const registration = {
  "audience": "https://vii.mattr.global",
  "url": "https://auth.mattr.global/oauth/token",
  "tenant_subdomain": "YOUR_TENANT_SUBDOMAIN",
  "client_id": "YOUR_CLIENT_ID",
  "client_secret": "YOUR_CLIENT_SECRET"
};

const sendRequest = async ({
  method,
  url,
  headers,
  data
}) => {
  try {
    const response = await axios({
      method,
      url,
      headers,
      data
    });

    return response.data;

  } catch (error) {
    console.log(error.response.data);
  }
};

const getAccessToken = async () => {
  const authz = await sendRequest({
    method: "post",
    url: "https://auth.mattr.global/oauth/token",
    headers: {
      "Content-Type": "application/json"
    },
    data: {
      "client_id": registration.client_id,
      "client_secret": registration.client_secret,
      "audience": "https://vii.mattr.global",
      "grant_type": "client_credentials"
    }
  });
  const access_token = authz.access_token;

  return access_token;
};

const createDID = async (access_token) => {
  const did = await sendRequest({
    method: "post",
    url: `https://${registration.tenant_subdomain}.vii.mattr.global/v1/dids`,
    headers: {
      "Content-Type": "application/json",
      "Authorization": `Bearer ${access_token}`
    },
    data: {
      method: "key"
    }
  });

  return did;
};

const getDIDs = async (access_token) => {
  const dids = await sendRequest({
    method: "get",
    url: `https://${registration.tenant_subdomain}.vii.mattr.global/v1/dids`,
    headers: {
      "Content-Type": "application/json",
      "Authorization": `Bearer ${access_token}`
    }
  });

  return dids;
};

const signCredential = async (access_token, issuerDID) => {
  const credential = await sendRequest({
    url: `https://${registration.tenant_subdomain}.vii.mattr.global/v2/credentials/web-semantic/sign`,
    method: "post",
    headers: {
      "Content-Type": "application/json",
      "Authorization": `Bearer ${access_token}`
    },
    data: {
      "payload": {
        "@context": [
          "https://schema.org"
        ],
        "name": "Course credential",
        "description": "Course credential description",
        "type": [
          "CourseCredential"
        ],
        "credentialSubject": {
          "id": "did:key:z6MkfxQU7dy8eKxyHpG267FV23agZQu9zmokd8BprepfHALi",
          "givenName": "Chris",
          "familyName": "Shin",
          "educationalCredentialAwarded": "Certificate Name"
        },
        "issuer": {
          "id": issuerDID,
          "name": "tenant"
        },
        "expirationDate": "2024-02-07T06:44:28.952Z"
      },
      "tag": "identifier123",
      "persist": false,
      "revocable": false,
    }
  });

  return credential;
};

const viiQuickStart = async () => {
  const access_token = await getAccessToken();

  if (access_token) {
    const did = await createDID(access_token);
    console.log({
      did
    });

    const dids = await getDIDs(access_token);
    console.log({
      dids: `${dids.data.length} total DIDs.`
    });

    const issuerDID = did.did;
    const credential = await signCredential(access_token, issuerDID);
    return credential
  }
};

// Create a DID and sign a credential
viiQuickStart().then((credential) => {
  console.log(JSON.stringify(credential, null, 3));
});