feat(keycard): `ConvertToRegularAccount` endpoint added

It converts a keycard user to a regular user, setting all necessary details
that logged in account looks like it has never been a keycard account.

api/geth_backend.go

@@ -565,7 +565,7 @@ func (b *GethStatusBackend) ChangeDatabasePassword(keyUID string, password strin
 }
 
 func (b *GethStatusBackend) ConvertToKeycardAccount(keyStoreDir string, account multiaccounts.Account, s settings.Settings, password string, newPassword string) error {
-	err := b.multiaccountsDB.UpdateAccountKeycardPairing(account)
+	err := b.multiaccountsDB.UpdateAccountKeycardPairing(account.KeyUID, account.KeycardPairing)
 	if err != nil {
 		return err
 	}
@@ -650,6 +650,87 @@ func (b *GethStatusBackend) ConvertToKeycardAccount(keyStoreDir string, account
 	return nil
 }
 
+func (b *GethStatusBackend) ConvertToRegularAccount(mnemonic string, currPassword string, newPassword string) error {
+	mnemonicNoExtraSpaces := strings.Join(strings.Fields(mnemonic), " ")
+	accountInfo, err := b.accountManager.AccountsGenerator().ImportMnemonic(mnemonicNoExtraSpaces, "")
+	if err != nil {
+		return err
+	}
+
+	kdfIterations, err := b.multiaccountsDB.GetAccountKDFIterationsNumber(accountInfo.KeyUID)
+	if err != nil {
+		return err
+	}
+
+	err = b.ensureAppDBOpened(multiaccounts.Account{KeyUID: accountInfo.KeyUID, KDFIterations: kdfIterations}, newPassword)
+	if err != nil {
+		return err
+	}
+
+	db, err := accounts.NewDB(b.appDB)
+	if err != nil {
+		return err
+	}
+
+	knownAccounts, err := db.GetAccounts()
+	if err != nil {
+		return err
+	}
+
+	// We add these two paths, cause others will be added via `StoreAccount` function call
+	const pathWalletRoot = "m/44'/60'/0'/0"
+	const pathEIP1581 = "m/43'/60'/1581'"
+	var paths []string
+	paths = append(paths, pathWalletRoot, pathEIP1581)
+	for _, acc := range knownAccounts {
+		if accountInfo.KeyUID == acc.KeyUID {
+			paths = append(paths, acc.Path)
+		}
+	}
+
+	_, err = b.accountManager.AccountsGenerator().StoreAccount(accountInfo.ID, currPassword)
+	if err != nil {
+		return err
+	}
+
+	_, err = b.accountManager.AccountsGenerator().StoreDerivedAccounts(accountInfo.ID, currPassword, paths)
+	if err != nil {
+		return err
+	}
+
+	err = b.multiaccountsDB.UpdateAccountKeycardPairing(accountInfo.KeyUID, "")
+	if err != nil {
+		return err
+	}
+
+	err = db.DeleteKeypair(accountInfo.KeyUID)
+	if err != nil {
+		return err
+	}
+
+	err = db.SaveSettingField(settings.KeycardInstanceUID, "")
+	if err != nil {
+		return err
+	}
+
+	err = db.SaveSettingField(settings.KeycardPairedOn, 0)
+	if err != nil {
+		return err
+	}
+
+	err = db.SaveSettingField(settings.KeycardPairing, "")
+	if err != nil {
+		return err
+	}
+
+	err = b.closeAppDB()
+	if err != nil {
+		return err
+	}
+
+	return b.ChangeDatabasePassword(accountInfo.KeyUID, currPassword, newPassword)
+}
+
 func (b *GethStatusBackend) VerifyDatabasePassword(keyUID string, password string) error {
 	kdfIterations, err := b.multiaccountsDB.GetAccountKDFIterationsNumber(keyUID)
 	if err != nil {

mobile/status.go

@@ -847,6 +847,14 @@ func ConvertToKeycardAccount(keyStoreDir, accountData, settingsJSON, password, n
 	return makeJSONResponse(nil)
 }
 
+func ConvertToRegularAccount(mnemonic, currPassword, newPassword string) string {
+	err := statusBackend.ConvertToRegularAccount(mnemonic, currPassword, newPassword)
+	if err != nil {
+		return makeJSONResponse(err)
+	}
+	return makeJSONResponse(nil)
+}
+
 func ImageServerTLSCert() string {
 	cert, err := server.PublicTLSCert()
 

multiaccounts/database.go

@@ -317,8 +317,8 @@ func (db *Database) UpdateAccount(account Account) error {
 	return err
 }
 
-func (db *Database) UpdateAccountKeycardPairing(account Account) error {
-	_, err := db.db.Exec("UPDATE accounts SET keycardPairing = ? WHERE keyUid = ?", account.KeycardPairing, account.KeyUID)
+func (db *Database) UpdateAccountKeycardPairing(keyUID string, keycardPairing string) error {
+	_, err := db.db.Exec("UPDATE accounts SET keycardPairing = ? WHERE keyUid = ?", keycardPairing, keyUID)
 	return err
 }