crowd-funder-for-time-pwa/src/views/ContactQRScanShowView.vue

<template>
  <QuickNav selected="Profile"></QuickNav>
  <!-- CONTENT -->
  <section id="Content" class="p-6 pb-24">
    <!-- Heading -->
    <h1 id="ViewHeading" class="text-4xl text-center font-light pt-4 mb-8">
      Your Contact Info
    </h1>

    <!--
      Play with display options: https://qr-code-styling.com/
      See docs: https://www.npmjs.com/package/qr-code-generator-vue3
    -->
    <QRCodeVue3
      :value="this.qrValue"
      :cornersSquareOptions="{ type: 'extra-rounded' }"
      :dotsOptions="{ type: 'square' }"
      class="flex justify-center"
    />
    <AlertMessage
      :alertTitle="alertTitle"
      :alertMessage="alertMessage"
    ></AlertMessage>
  </section>
</template>

<script lang="ts">
import QRCodeVue3 from "qr-code-generator-vue3";
import { Component, Vue } from "vue-facing-decorator";
import { accountsDB, db } from "@/db";
import { MASTER_SETTINGS_KEY } from "@/db/tables/settings";
import * as R from "ramda";
import { SimpleSigner } from "@/libs/crypto";
import * as didJwt from "did-jwt";
import AlertMessage from "@/components/AlertMessage";
import QuickNav from "@/components/QuickNav";

// eslint-disable-next-line @typescript-eslint/no-var-requires
const Buffer = require("buffer/").Buffer;

@Component({
  components: {
    QRCodeVue3,
    AlertMessage,
    QuickNav,
  },
})
export default class ContactQRScanShow extends Vue {
  activeDid = "";
  apiServer = "";
  qrValue = "";

  async created() {
    await db.open();
    const settings = await db.settings.get(MASTER_SETTINGS_KEY);
    this.activeDid = settings?.activeDid || "";
    this.apiServer = settings?.apiServer || "";

    await accountsDB.open();
    const accounts = await accountsDB.accounts.toArray();
    const account = R.find((acc) => acc.did === this.activeDid, accounts);
    if (!account) {
      this.alertMessage = "You have no identity yet.";
    } else {
      const identity = JSON.parse(account?.identity || "null");
      if (!identity) {
        throw new Error(
          "An ID is chosen but there are no keys for it so it cannot be used to talk with the service.",
        );
      }

      const publicKeyHex = identity.keys[0].publicKeyHex;
      const publicEncKey = Buffer.from(publicKeyHex, "hex").toString("base64");
      const contactInfo = {
        iat: Date.now(),
        iss: this.activeDid,
        own: {
          name: (settings?.firstName || "") + " " + (settings?.lastName || ""),
          publicEncKey,
        },
      };

      const alg = undefined;
      const privateKeyHex: string = identity.keys[0].privateKeyHex;
      const signer = await SimpleSigner(privateKeyHex);
      // create a JWT for the request
      const vcJwt: string = await didJwt.createJWT(contactInfo, {
        alg: alg,
        issuer: identity.did,
        signer: signer,
      });
      const viewPrefix = "https://endorser.ch/contact?jwt=";
      this.qrValue = viewPrefix + vcJwt;
    }
  }

  // This same popup code is in many files.
  alertTitle = "";
  alertMessage = "";
}
</script>