automatically create an identity on the first page (and other UI tweaks)

src/libs/util.ts

@@ -3,8 +3,9 @@
 import axios, { AxiosResponse } from "axios";
 
 import { DEFAULT_PUSH_SERVER } from "@/constants/app";
-import { db } from "@/db/index";
+import { accountsDB, db } from "@/db/index";
 import { MASTER_SETTINGS_KEY } from "@/db/tables/settings";
+import { deriveAddress, generateSeed, newIdentifier } from "@/libs/crypto";
 
 // eslint-disable-next-line @typescript-eslint/no-var-requires
 const Buffer = require("buffer/").Buffer;
@@ -18,6 +19,36 @@ export const isGlobalUri = (uri: string) => {
 export const ONBOARD_MESSAGE =
   "1) Check that they have entered their name on the profile page in their device. 2) Add them to your Contacts by scanning with the QR icon that is by the input box. 3) Click the person icon to register them. 4) Have them go to their Contact page and scan your QR to add you to their list.";
 
+/**
+ * Generates a new identity, saves it to the database, and sets it as the active identity.
+ * @return {Promise<string>} with the DID of the new identity
+ */
+export const generateSaveAndActivateIdentity = async (): Promise<string> => {
+  const mnemonic = generateSeed();
+  // address is 0x... ETH address, without "did:eth:"
+  const [address, privateHex, publicHex, derivationPath] =
+    deriveAddress(mnemonic);
+
+  const newId = newIdentifier(address, publicHex, privateHex, derivationPath);
+  const identity = JSON.stringify(newId);
+
+  await accountsDB.open();
+  await accountsDB.accounts.add({
+    dateCreated: new Date().toISOString(),
+    derivationPath: derivationPath,
+    did: newId.did,
+    identity: identity,
+    mnemonic: mnemonic,
+    publicKeyHex: newId.keys[0].publicKeyHex,
+  });
+
+  await db.settings.update(MASTER_SETTINGS_KEY, {
+    activeDid: newId.did,
+  });
+
+  return newId.did;
+};
+
 export const sendTestThroughPushServer = async (
   subscription: PushSubscription,
   skipFilter: boolean,