add correct encodings for public keys, plus some instructions for entering a contact

src/views/ContactsView.vue

@@ -144,6 +144,9 @@ import { accountsDB, db } from "@/db";
 import { Contact } from "@/db/tables/contacts";
 import { MASTER_SETTINGS_KEY } from "@/db/tables/settings";
 
+// eslint-disable-next-line @typescript-eslint/no-var-requires
+const Buffer = require("buffer/").Buffer;
+
 export interface GiveVerifiableCredential {
   "@context": string;
   "@type": string;
@@ -196,6 +199,11 @@ export default class ContactsView extends Vue {
         publicKeyBase64 = this.contactInput.substring(commaPos2 + 1).trim();
       }
     }
+    // help with potential mistakes while this sharing requires copy-and-paste
+    if (publicKeyBase64 && /^[0-9A-Fa-f]{66}$/i.test(publicKeyBase64)) {
+      // it must be all hex (compressed public key), so convert
+      publicKeyBase64 = Buffer.from(publicKeyBase64, "hex").toString("base64");
+    }
     const newContact = { did, name, publicKeyBase64 };
     await db.contacts.add(newContact);
     this.contacts = this.contacts.concat([newContact]);