add the hashed-next-key to the contact data, shown & stored

src/views/ContactQRScanShowView.vue

@@ -58,16 +58,17 @@
 </template>
 
 <script lang="ts">
+import * as didJwt from "did-jwt";
+import { sha256 } from "ethereum-cryptography/sha256.js";
 import QRCodeVue3 from "qr-code-generator-vue3";
+import * as R from "ramda";
 import { Component, Vue } from "vue-facing-decorator";
 import { QrcodeStream } from "vue-qrcode-reader";
 import { useClipboard } from "@vueuse/core";
 
 import { accountsDB, db } from "@/db/index";
 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 { deriveAddress, nextDerivationPath, SimpleSigner } from "@/libs/crypto";
 import QuickNav from "@/components/QuickNav.vue";
 import { Account } from "@/db/tables/accounts";
 import {
@@ -131,6 +132,14 @@ export default class ContactQRScanShow extends Vue {
       const identity = await this.getIdentity(this.activeDid);
       const publicKeyHex = identity.keys[0].publicKeyHex;
       const publicEncKey = Buffer.from(publicKeyHex, "hex").toString("base64");
+
+      const newDerivPath = nextDerivationPath(account.derivationPath);
+      const nextPublicHex = deriveAddress(account.mnemonic, newDerivPath)[2];
+      const nextPublicEncKey = Buffer.from(nextPublicHex, "hex");
+      const nextPublicEncKeyHash = sha256(nextPublicEncKey);
+      const nextPublicEncKeyHashBase64 =
+        Buffer.from(nextPublicEncKeyHash).toString("base64");
+
       const contactInfo = {
         iat: Date.now(),
         iss: this.activeDid,
@@ -139,6 +148,7 @@ export default class ContactQRScanShow extends Vue {
             (settings?.firstName || "") +
             (settings?.lastName ? ` ${settings.lastName}` : ""), // deprecated, pre v 0.1.3
           publicEncKey,
+          nextPublicEncKeyHash: nextPublicEncKeyHashBase64,
         },
       };