diff --git a/app/lib/common/components/account_select_list.dart b/app/lib/common/components/account_select_list.dart
index dfa804d5a..6f78d3312 100644
--- a/app/lib/common/components/account_select_list.dart
+++ b/app/lib/common/components/account_select_list.dart
@@ -2,6 +2,7 @@ import 'package:encointer_wallet/common/components/address_icon.dart';
 import 'package:encointer_wallet/store/account/types/account_data.dart';
 import 'package:encointer_wallet/store/app.dart';
 import 'package:encointer_wallet/utils/format.dart';
+import 'package:ew_keyring/ew_keyring.dart';
 import 'package:flutter/material.dart';
 
 class AccountSelectList extends StatelessWidget {
@@ -14,7 +15,7 @@ class AccountSelectList extends StatelessWidget {
   Widget build(BuildContext context) {
     return ListView(
       children: accounts.map((account) {
-        final address = Fmt.ss58Encode(account.pubKey, prefix: store.settings.endpoint.ss58!);
+        final address = AddressUtils.pubKeyHexToAddress(account.pubKey, prefix: store.settings.endpoint.ss58!);
 
         return ListTile(
           leading: AddressIcon(address, account.pubKey),
diff --git a/app/lib/common/components/address_input_field.dart b/app/lib/common/components/address_input_field.dart
index 87a5eafdd..cc3ee6083 100644
--- a/app/lib/common/components/address_input_field.dart
+++ b/app/lib/common/components/address_input_field.dart
@@ -1,5 +1,4 @@
 import 'package:dropdown_search/dropdown_search.dart';
-import 'package:ew_test_keys/ew_test_keys.dart';
 import 'package:flutter/material.dart';
 
 import 'package:encointer_wallet/common/components/address_icon.dart';
@@ -8,6 +7,8 @@ import 'package:encointer_wallet/store/account/types/account_data.dart';
 import 'package:encointer_wallet/store/app.dart';
 import 'package:encointer_wallet/utils/format.dart';
 import 'package:encointer_wallet/l10n/l10.dart';
+import 'package:ew_keyring/ew_keyring.dart';
+import 'package:ew_test_keys/ew_test_keys.dart';
 
 class AddressInputField extends StatefulWidget {
   const AddressInputField(
@@ -35,7 +36,7 @@ class _AddressInputFieldState extends State<AddressInputField> {
     final ss58 = widget.store.settings.endpoint.ss58!;
     // we can't just use account.address unfortunately, see #1019.
     return account.name.startsWith(nameOrAddress.trim()) ||
-        Fmt.ss58Encode(account.pubKey, prefix: ss58).startsWith(nameOrAddress.trim());
+        AddressUtils.pubKeyHexToAddress(account.pubKey, prefix: ss58).startsWith(nameOrAddress.trim());
   }
 
   Widget _selectedItemBuilder(BuildContext context, AccountData? account) {
@@ -43,7 +44,7 @@ class _AddressInputFieldState extends State<AddressInputField> {
       return Container();
     }
 
-    final address = Fmt.ss58Encode(account.pubKey, prefix: widget.store.settings.endpoint.ss58!);
+    final address = AddressUtils.pubKeyHexToAddress(account.pubKey, prefix: widget.store.settings.endpoint.ss58!);
 
     return Container(
       padding: const EdgeInsets.only(top: 8),
@@ -70,7 +71,7 @@ class _AddressInputFieldState extends State<AddressInputField> {
   }
 
   Widget _listItemBuilder(BuildContext context, AccountData account, bool isSelected) {
-    final address = Fmt.ss58Encode(account.pubKey, prefix: widget.store.settings.endpoint.ss58!);
+    final address = AddressUtils.pubKeyHexToAddress(account.pubKey, prefix: widget.store.settings.endpoint.ss58!);
 
     return Container(
       margin: const EdgeInsets.symmetric(horizontal: 8),
@@ -115,7 +116,7 @@ class _AddressInputFieldState extends State<AddressInputField> {
           emptyBuilder: (context, searchEntry) {
             if (Fmt.isAddress(searchEntry)) {
               final address = searchEntry.replaceAll(' ', '');
-              final pubKey = Fmt.ss58Decode(address).pubKey;
+              final pubKey = AddressUtils.addressToPubKeyHex(address);
               final newAccount = AccountData()
                 ..address = address
                 ..pubKey = pubKey
diff --git a/app/lib/models/transfer/transfer_history.dart b/app/lib/models/transfer/transfer_history.dart
index b71e6f816..b5f082aec 100644
--- a/app/lib/models/transfer/transfer_history.dart
+++ b/app/lib/models/transfer/transfer_history.dart
@@ -1,11 +1,11 @@
-import 'package:encointer_wallet/service/log/log_service.dart';
 import 'package:flutter/material.dart';
 import 'package:json_annotation/json_annotation.dart';
 
+import 'package:encointer_wallet/l10n/l10.dart';
 import 'package:encointer_wallet/utils/extensions/double/double_extension.dart';
 import 'package:encointer_wallet/store/account/types/account_data.dart';
-import 'package:encointer_wallet/l10n/l10.dart';
-import 'package:encointer_wallet/utils/format.dart';
+import 'package:encointer_wallet/service/log/log_service.dart';
+import 'package:ew_keyring/ew_keyring.dart';
 
 part 'transfer_history.g.dart';
 
@@ -51,7 +51,7 @@ class Transaction {
       try {
         // Contact address might be with default prefix 42, or with Kusama prefix 2.
         // So better to work with the universal pubKey.
-        if (contact.pubKey == Fmt.ss58Decode(counterParty).pubKey) {
+        if (contact.pubKey == AddressUtils.addressToPubKeyHex(counterParty)) {
           return contact.name;
         }
       } catch (e) {
diff --git a/app/lib/modules/account/logic/new_account_store.dart b/app/lib/modules/account/logic/new_account_store.dart
index 232f86304..f14af3be6 100644
--- a/app/lib/modules/account/logic/new_account_store.dart
+++ b/app/lib/modules/account/logic/new_account_store.dart
@@ -6,7 +6,7 @@ import 'package:encointer_wallet/modules/modules.dart';
 import 'package:encointer_wallet/service/log/log_service.dart';
 import 'package:encointer_wallet/service/substrate_api/api.dart';
 import 'package:encointer_wallet/store/app.dart';
-import 'package:encointer_wallet/utils/format.dart';
+import 'package:ew_keyring/ew_keyring.dart';
 import 'package:provider/provider.dart';
 
 part 'new_account_store.g.dart';
@@ -68,7 +68,8 @@ abstract class _NewAccountStoreBase with Store {
 
       await context.read<LoginStore>().setPin(pin);
       final appStore = context.read<AppStore>();
-      acc['address'] = Fmt.ss58Encode(acc['pubKey'] as String, prefix: appStore.settings.endpoint.ss58!);
+      acc['address'] =
+          AddressUtils.pubKeyHexToAddress(acc['pubKey'] as String, prefix: appStore.settings.endpoint.ss58!);
       return saveAccount(webApi, appStore, acc, pin);
     } catch (e, s) {
       _loading = false;
@@ -93,7 +94,8 @@ abstract class _NewAccountStoreBase with Store {
       } else {
         await context.read<LoginStore>().setPin(pin);
         final appStore = context.read<AppStore>();
-        acc['address'] = Fmt.ss58Encode(acc['pubKey'] as String, prefix: appStore.settings.endpoint.ss58!);
+        acc['address'] =
+            AddressUtils.pubKeyHexToAddress(acc['pubKey'] as String, prefix: appStore.settings.endpoint.ss58!);
         final index = appStore.account.accountList.indexWhere((i) => i.pubKey == acc['pubKey']);
         if (index > -1) {
           _loading = false;
diff --git a/app/lib/modules/account/view/import_account_view.dart b/app/lib/modules/account/view/import_account_view.dart
index b6d654acb..e1fa6f6ca 100644
--- a/app/lib/modules/account/view/import_account_view.dart
+++ b/app/lib/modules/account/view/import_account_view.dart
@@ -6,7 +6,6 @@ import 'package:provider/provider.dart';
 
 import 'package:encointer_wallet/common/components/encointer_text_form_field.dart';
 import 'package:encointer_wallet/theme/theme.dart';
-import 'package:encointer_wallet/utils/validate_keys.dart';
 import 'package:encointer_wallet/common/components/form/scrollable_form.dart';
 import 'package:encointer_wallet/common/components/gradient_elements.dart';
 import 'package:encointer_wallet/common/components/loading/centered_activity_indicator.dart';
@@ -17,6 +16,7 @@ import 'package:encointer_wallet/utils/alerts/app_alert.dart';
 import 'package:encointer_wallet/utils/format.dart';
 import 'package:encointer_wallet/utils/input_validation.dart';
 import 'package:encointer_wallet/l10n/l10.dart';
+import 'package:ew_keyring/ew_keyring.dart' show ValidateKeys;
 
 class ImportAccountView extends StatelessWidget {
   const ImportAccountView({super.key});
diff --git a/app/lib/modules/transfer/logic/transfer_history_view_store.dart b/app/lib/modules/transfer/logic/transfer_history_view_store.dart
index fecb6e5dd..24d4552c7 100644
--- a/app/lib/modules/transfer/logic/transfer_history_view_store.dart
+++ b/app/lib/modules/transfer/logic/transfer_history_view_store.dart
@@ -1,13 +1,13 @@
 // ignore_for_file: library_private_types_in_public_api
-import 'package:encointer_wallet/service/log/log_service.dart';
-import 'package:ew_http/ew_http.dart';
 import 'package:mobx/mobx.dart';
 
 import 'package:encointer_wallet/models/index.dart';
-import 'package:encointer_wallet/utils/format.dart';
 import 'package:encointer_wallet/store/app.dart';
 import 'package:encointer_wallet/config/consts.dart';
 import 'package:encointer_wallet/utils/fetch_status.dart';
+import 'package:encointer_wallet/service/log/log_service.dart';
+import 'package:ew_http/ew_http.dart';
+import 'package:ew_keyring/ew_keyring.dart';
 
 part 'transfer_history_view_store.g.dart';
 
@@ -43,7 +43,7 @@ abstract class _TransferHistoryViewStoreBase with Store {
     }
 
     try {
-      final address = Fmt.ss58Encode(
+      final address = AddressUtils.pubKeyHexToAddress(
         pubKey,
         prefix: appStore.settings.endpoint.ss58 ?? 42,
       );
diff --git a/app/lib/modules/transfer/widgets/transaction_card.dart b/app/lib/modules/transfer/widgets/transaction_card.dart
index b90b9b4aa..c306d9db6 100644
--- a/app/lib/modules/transfer/widgets/transaction_card.dart
+++ b/app/lib/modules/transfer/widgets/transaction_card.dart
@@ -11,6 +11,7 @@ import 'package:encointer_wallet/models/index.dart';
 import 'package:encointer_wallet/utils/format.dart';
 import 'package:encointer_wallet/store/app.dart';
 import 'package:encointer_wallet/utils/ui.dart';
+import 'package:ew_keyring/ew_keyring.dart';
 
 class TransactionCard extends StatelessWidget {
   const TransactionCard(
@@ -137,7 +138,7 @@ String tryGetPubKey(Transaction transaction) {
   String counterPartyPubKey;
 
   try {
-    counterPartyPubKey = Fmt.ss58Decode(transaction.counterParty).pubKey;
+    counterPartyPubKey = AddressUtils.addressToPubKeyHex(transaction.counterParty);
   } catch (e) {
     Log.e('Could not decode address. Error: $e');
 
diff --git a/app/lib/page-encointer/meetup/ceremony_step2_scan2.dart b/app/lib/page-encointer/meetup/ceremony_step2_scan2.dart
index df61ad9d9..6b5f35ffc 100644
--- a/app/lib/page-encointer/meetup/ceremony_step2_scan2.dart
+++ b/app/lib/page-encointer/meetup/ceremony_step2_scan2.dart
@@ -7,7 +7,6 @@ import 'package:provider/provider.dart';
 
 import 'package:encointer_wallet/service/substrate_api/api.dart';
 import 'package:encointer_wallet/store/app.dart';
-import 'package:encointer_wallet/utils/format.dart';
 import 'package:encointer_wallet/modules/modules.dart';
 import 'package:encointer_wallet/utils/snack_bar.dart';
 import 'package:encointer_wallet/l10n/l10.dart';
@@ -19,6 +18,7 @@ import 'package:encointer_wallet/common/components/logo/participant_avatar.dart'
 import 'package:encointer_wallet/page-encointer/meetup/ceremony_progress_bar.dart';
 import 'package:encointer_wallet/page-encointer/meetup/ceremony_step3_finish.dart';
 import 'package:encointer_wallet/page-encointer/meetup/scan_claim_qr_code.dart';
+import 'package:ew_keyring/ew_keyring.dart';
 
 class CeremonyStep2Scan extends StatelessWidget {
   const CeremonyStep2Scan(
@@ -136,7 +136,7 @@ class CeremonyStep2Scan extends StatelessWidget {
 
   int meetupIndexOfAccount(String accountPubKey) {
     final participants = store.encointer.communityAccount!.meetup!.registry;
-    final address = Fmt.ss58Encode(accountPubKey);
+    final address = AddressUtils.pubKeyHexToAddress(accountPubKey);
 
     // the addresses of the meetup are encoded with the default prefix: 42.
     return participants.indexOf(address);
diff --git a/app/lib/page-encointer/meetup/scan_claim_qr_code.dart b/app/lib/page-encointer/meetup/scan_claim_qr_code.dart
index e93155f4b..eb68abbcf 100644
--- a/app/lib/page-encointer/meetup/scan_claim_qr_code.dart
+++ b/app/lib/page-encointer/meetup/scan_claim_qr_code.dart
@@ -2,7 +2,7 @@ import 'package:ew_test_keys/ew_test_keys.dart';
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_mobx/flutter_mobx.dart';
-import 'package:mobile_scanner/mobile_scanner.dart';
+import 'package:mobile_scanner/mobile_scanner.dart' show MobileScanner, MobileScannerController;
 import 'package:permission_handler/permission_handler.dart';
 import 'package:provider/provider.dart';
 
@@ -13,6 +13,7 @@ import 'package:encointer_wallet/store/app.dart';
 import 'package:encointer_wallet/utils/format.dart';
 import 'package:encointer_wallet/utils/snack_bar.dart';
 import 'package:encointer_wallet/l10n/l10.dart';
+import 'package:ew_keyring/ew_keyring.dart' show AddressUtils, Address;
 
 class ScanClaimQrCode extends StatefulWidget {
   const ScanClaimQrCode(this.confirmedParticipantsCount, {super.key});
@@ -30,15 +31,14 @@ class _ScanClaimQrCodeState extends State<ScanClaimQrCode> {
   @override
   void initState() {
     final store = context.read<AppStore>();
-    currentAddressPrefix42 = Fmt.ss58Encode(store.account.currentAccountPubKey!);
+    currentAddressPrefix42 = AddressUtils.pubKeyHexToAddress(store.account.currentAccountPubKey!);
     allParticipantsPrefix42 = store.encointer.communityAccount?.meetup?.registry ?? [];
     super.initState();
   }
 
   /// Checks that the `attendeeAddress` is not equal to self and part of the meetup registry.
   void validateAndStoreParticipant(AppStore store, String attendeeAddress, AppLocalizations l10n) {
-    final attendeePubKey = Fmt.ss58Decode(attendeeAddress).pubKey;
-    final attendeeAddressPrefix42 = Fmt.ss58Encode(attendeePubKey);
+    final attendeeAddressPrefix42 = Address.decode(attendeeAddress).encode(prefix: 42);
 
     if (attendeeAddressPrefix42 == currentAddressPrefix42) {
       RootSnackBar.showMsg(l10n.meetupClaimantEqualToSelf);
diff --git a/app/lib/page/assets/receive/receive_page.dart b/app/lib/page/assets/receive/receive_page.dart
index 188f17636..79df5d5aa 100644
--- a/app/lib/page/assets/receive/receive_page.dart
+++ b/app/lib/page/assets/receive/receive_page.dart
@@ -1,4 +1,3 @@
-import 'package:ew_test_keys/ew_test_keys.dart';
 import 'package:flutter/material.dart';
 import 'package:focus_detector/focus_detector.dart';
 import 'package:pausable_timer/pausable_timer.dart';
@@ -10,7 +9,6 @@ import 'package:encointer_wallet/page/assets/qr_code_printing/pages/qr_code_shar
 import 'package:encointer_wallet/common/components/wake_lock_and_brightness_enhancer.dart';
 import 'package:encointer_wallet/theme/theme.dart';
 import 'package:encointer_wallet/config/consts.dart';
-import 'package:encointer_wallet/utils/format.dart';
 import 'package:encointer_wallet/page/qr_scan/qr_codes/index.dart';
 import 'package:encointer_wallet/service/log/log_service.dart';
 import 'package:encointer_wallet/service/notification/lib/notification.dart';
@@ -19,6 +17,8 @@ import 'package:encointer_wallet/store/app.dart';
 import 'package:encointer_wallet/utils/snack_bar.dart';
 import 'package:encointer_wallet/l10n/l10.dart';
 import 'package:encointer_wallet/utils/ui.dart';
+import 'package:ew_keyring/ew_keyring.dart';
+import 'package:ew_test_keys/ew_test_keys.dart';
 
 class ReceivePage extends StatefulWidget {
   const ReceivePage({super.key});
@@ -44,7 +44,8 @@ class _ReceivePageState extends State<ReceivePage> {
   void initState() {
     super.initState();
     _appStore = context.read<AppStore>();
-    final address = Fmt.ss58Encode(_appStore.account.currentAccountPubKey!, prefix: _appStore.settings.endpoint.ss58!);
+    final address = AddressUtils.pubKeyHexToAddress(_appStore.account.currentAccountPubKey!,
+        prefix: _appStore.settings.endpoint.ss58!);
     invoice = InvoiceQrCode(
       account: address,
       cid: _appStore.encointer.chosenCid,
diff --git a/app/lib/page/assets/transfer/payment_confirmation_page/components/payment_overview.dart b/app/lib/page/assets/transfer/payment_confirmation_page/components/payment_overview.dart
index 03aa821cf..43e437ea9 100644
--- a/app/lib/page/assets/transfer/payment_confirmation_page/components/payment_overview.dart
+++ b/app/lib/page/assets/transfer/payment_confirmation_page/components/payment_overview.dart
@@ -6,6 +6,7 @@ import 'package:encointer_wallet/store/account/types/account_data.dart';
 import 'package:encointer_wallet/store/app.dart';
 import 'package:encointer_wallet/theme/theme.dart';
 import 'package:encointer_wallet/utils/format.dart';
+import 'package:ew_keyring/ew_keyring.dart';
 
 class PaymentOverview extends StatelessWidget {
   const PaymentOverview(this.store, this.communitySymbol, this.recipientAccount, this.amount, {super.key});
@@ -20,7 +21,7 @@ class PaymentOverview extends StatelessWidget {
   Widget build(BuildContext context) {
     final recipientLabel = recipientAccount!.name;
     final recipientAddress =
-        Fmt.address(Fmt.ss58Encode(recipientAccount!.pubKey, prefix: store.settings.endpoint.ss58!))!;
+        Fmt.address(AddressUtils.pubKeyHexToAddress(recipientAccount!.pubKey, prefix: store.settings.endpoint.ss58!))!;
 
     return IntrinsicHeight(
       child: Row(
diff --git a/app/lib/page/assets/transfer/payment_confirmation_page/index.dart b/app/lib/page/assets/transfer/payment_confirmation_page/index.dart
index f08716e94..0124668d5 100644
--- a/app/lib/page/assets/transfer/payment_confirmation_page/index.dart
+++ b/app/lib/page/assets/transfer/payment_confirmation_page/index.dart
@@ -1,8 +1,5 @@
 import 'dart:async';
 
-import 'package:encointer_wallet/service/tx/lib/src/send_tx_dart.dart';
-import 'package:ew_polkadart/generated/encointer_kusama/types/sp_runtime/dispatch_error.dart';
-import 'package:ew_test_keys/ew_test_keys.dart';
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 import 'package:iconsax/iconsax.dart';
@@ -21,10 +18,14 @@ import 'package:encointer_wallet/page/assets/transfer/payment_confirmation_page/
 import 'package:encointer_wallet/service/log/log_service.dart';
 import 'package:encointer_wallet/service/substrate_api/api.dart';
 import 'package:encointer_wallet/service/tx/lib/tx.dart';
+import 'package:encointer_wallet/service/tx/lib/src/send_tx_dart.dart';
 import 'package:encointer_wallet/store/account/types/account_data.dart';
 import 'package:encointer_wallet/store/app.dart';
 import 'package:encointer_wallet/utils/format.dart';
 import 'package:encointer_wallet/l10n/l10.dart';
+import 'package:ew_keyring/ew_keyring.dart';
+import 'package:ew_polkadart/generated/encointer_kusama/types/sp_runtime/dispatch_error.dart';
+import 'package:ew_test_keys/ew_test_keys.dart';
 
 class PaymentConfirmationParams {
   const PaymentConfirmationParams({
@@ -63,7 +64,8 @@ class _PaymentConfirmationPageState extends State<PaymentConfirmationPage> {
     final cid = params.cid;
     final recipientAccount = params.recipientAccount;
     final amount = params.amount;
-    final recipientAddress = Fmt.ss58Encode(recipientAccount.pubKey, prefix: store.settings.endpoint.ss58!);
+    final recipientAddress =
+        AddressUtils.pubKeyHexToAddress(recipientAccount.pubKey, prefix: store.settings.endpoint.ss58!);
 
     return Scaffold(
       appBar: AppBar(title: Text(l10n.payment)),
diff --git a/app/lib/page/assets/transfer/transfer_page.dart b/app/lib/page/assets/transfer/transfer_page.dart
index 24700c6c7..442a8bf0e 100644
--- a/app/lib/page/assets/transfer/transfer_page.dart
+++ b/app/lib/page/assets/transfer/transfer_page.dart
@@ -1,4 +1,3 @@
-import 'package:ew_test_keys/ew_test_keys.dart';
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_mobx/flutter_mobx.dart';
@@ -24,6 +23,8 @@ import 'package:encointer_wallet/store/app.dart';
 import 'package:encointer_wallet/utils/format.dart';
 import 'package:encointer_wallet/l10n/l10.dart';
 import 'package:encointer_wallet/utils/ui.dart';
+import 'package:ew_keyring/ew_keyring.dart';
+import 'package:ew_test_keys/ew_test_keys.dart';
 
 class TransferPageParams {
   const TransferPageParams({
@@ -104,7 +105,7 @@ class _TransferPageState extends State<TransferPage> {
       _communitySymbol = params.communitySymbol ?? store.encointer.community?.symbol;
       _cid = params.cid ?? store.encointer.chosenCid;
 
-      final pubKey = Fmt.ss58Decode(params.recipientAddress).pubKey;
+      final pubKey = AddressUtils.addressToPubKeyHex(params.recipientAddress);
 
       _accountTo = AccountData()
         ..pubKey = pubKey
diff --git a/app/lib/page/network_select_page.dart b/app/lib/page/network_select_page.dart
index c389abd3a..c95ab2aa5 100644
--- a/app/lib/page/network_select_page.dart
+++ b/app/lib/page/network_select_page.dart
@@ -15,6 +15,7 @@ import 'package:encointer_wallet/store/app.dart';
 import 'package:encointer_wallet/store/settings.dart';
 import 'package:encointer_wallet/utils/format.dart';
 import 'package:encointer_wallet/l10n/l10.dart';
+import 'package:ew_keyring/ew_keyring.dart';
 
 class NetworkSelectPage extends StatefulWidget {
   const NetworkSelectPage({super.key});
@@ -100,7 +101,8 @@ class _NetworkSelectPageState extends State<NetworkSelectPage> {
     final accounts = <AccountData>[appStore.account.currentAccount, ...appStore.account.optionalAccounts];
 
     res.addAll(accounts.map((accountData) {
-      final address = Fmt.ss58Encode(accountData.pubKey, prefix: appStore.settings.endpoint.ss58 ?? 42);
+      final address =
+          AddressUtils.pubKeyHexToAddress(accountData.pubKey, prefix: appStore.settings.endpoint.ss58 ?? 42);
 
       return Card(
         shape: RoundedRectangleBorder(
diff --git a/app/lib/page/profile/account/account_manage_page.dart b/app/lib/page/profile/account/account_manage_page.dart
index 05064f985..f0695179a 100644
--- a/app/lib/page/profile/account/account_manage_page.dart
+++ b/app/lib/page/profile/account/account_manage_page.dart
@@ -25,6 +25,7 @@ import 'package:encointer_wallet/utils/format.dart';
 import 'package:encointer_wallet/utils/input_validation.dart';
 import 'package:encointer_wallet/l10n/l10.dart';
 import 'package:encointer_wallet/utils/ui.dart';
+import 'package:ew_keyring/ew_keyring.dart';
 import 'package:ew_test_keys/ew_test_keys.dart';
 
 class AccountManagePage extends StatefulWidget {
@@ -150,7 +151,8 @@ class _AccountManagePageState extends State<AccountManagePage> {
 
     final accountToBeEditedPubKey = ModalRoute.of(context)!.settings.arguments as String?;
     final accountToBeEdited = store.account.getAccountData(accountToBeEditedPubKey);
-    final addressSS58 = Fmt.ss58Encode(accountToBeEditedPubKey!, prefix: store.settings.endpoint.ss58!);
+    final addressSS58 =
+        AddressUtils.pubKeyHexToAddress(accountToBeEditedPubKey!, prefix: store.settings.endpoint.ss58!);
 
     _nameCtrl = TextEditingController(text: accountToBeEdited.name);
     _nameCtrl!.selection = TextSelection.fromPosition(TextPosition(offset: _nameCtrl!.text.length));
diff --git a/app/lib/page/profile/contacts/account_share_page.dart b/app/lib/page/profile/contacts/account_share_page.dart
index 80a7b5a72..761c8d1ec 100644
--- a/app/lib/page/profile/contacts/account_share_page.dart
+++ b/app/lib/page/profile/contacts/account_share_page.dart
@@ -5,12 +5,12 @@ import 'package:provider/provider.dart';
 import 'package:share_plus/share_plus.dart';
 
 import 'package:encointer_wallet/theme/theme.dart';
-import 'package:encointer_wallet/utils/format.dart';
 import 'package:encointer_wallet/config/consts.dart';
 import 'package:encointer_wallet/page/qr_scan/qr_codes/index.dart';
 import 'package:encointer_wallet/store/app.dart';
 import 'package:encointer_wallet/common/components/wake_lock_and_brightness_enhancer.dart';
 import 'package:encointer_wallet/l10n/l10.dart';
+import 'package:ew_keyring/ew_keyring.dart';
 
 class AccountSharePage extends StatefulWidget {
   const AccountSharePage({super.key});
@@ -29,7 +29,8 @@ class _AccountSharePageState extends State<AccountSharePage> {
 
     final accountToBeSharedPubKey = ModalRoute.of(context)!.settings.arguments as String?;
     final accountToBeShared = store.account.getAccountData(accountToBeSharedPubKey);
-    final addressSS58 = Fmt.ss58Encode(accountToBeSharedPubKey!, prefix: store.settings.endpoint.ss58!);
+    final addressSS58 =
+        AddressUtils.pubKeyHexToAddress(accountToBeSharedPubKey!, prefix: store.settings.endpoint.ss58!);
 
     final contactQrCode = ContactQrCode(
       account: addressSS58,
diff --git a/app/lib/page/profile/contacts/contact_detail_page.dart b/app/lib/page/profile/contacts/contact_detail_page.dart
index 9cc962f5c..7464aa54c 100644
--- a/app/lib/page/profile/contacts/contact_detail_page.dart
+++ b/app/lib/page/profile/contacts/contact_detail_page.dart
@@ -1,4 +1,3 @@
-import 'package:ew_test_keys/ew_test_keys.dart';
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_mobx/flutter_mobx.dart';
@@ -18,6 +17,8 @@ import 'package:encointer_wallet/store/app.dart';
 import 'package:encointer_wallet/utils/format.dart';
 import 'package:encointer_wallet/l10n/l10.dart';
 import 'package:encointer_wallet/utils/ui.dart';
+import 'package:ew_keyring/ew_keyring.dart';
+import 'package:ew_test_keys/ew_test_keys.dart';
 
 class ContactDetailPage extends StatefulWidget {
   const ContactDetailPage(this.accountData, {super.key});
@@ -46,7 +47,7 @@ class _ContactDetailPageState extends State<ContactDetailPage> {
   Widget build(BuildContext context) {
     final l10n = context.l10n;
     final store = context.watch<AppStore>();
-    final address = Fmt.ss58Encode(account.pubKey, prefix: store.settings.endpoint.ss58!);
+    final address = AddressUtils.pubKeyHexToAddress(account.pubKey, prefix: store.settings.endpoint.ss58!);
     return Scaffold(
       appBar: AppBar(
         title: isEditing
@@ -277,7 +278,7 @@ class EndorseButton extends StatelessWidget {
     final community = store.encointer.community;
     final bootstrappers = community?.bootstrappers;
     final l10n = context.l10n;
-    final address = Fmt.ss58Encode(contact.pubKey, prefix: store.settings.endpoint.ss58!);
+    final address = AddressUtils.pubKeyHexToAddress(contact.pubKey, prefix: store.settings.endpoint.ss58!);
 
     if (bootstrappers != null && bootstrappers.contains(address)) {
       await _popupDialog(context, l10n.cantEndorseBootstrapper);
diff --git a/app/lib/page/profile/contacts/contact_page.dart b/app/lib/page/profile/contacts/contact_page.dart
index 9c3190271..a943afde4 100644
--- a/app/lib/page/profile/contacts/contact_page.dart
+++ b/app/lib/page/profile/contacts/contact_page.dart
@@ -1,4 +1,3 @@
-import 'package:ew_test_keys/ew_test_keys.dart';
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 import 'package:iconsax/iconsax.dart';
@@ -12,6 +11,8 @@ import 'package:encointer_wallet/service/substrate_api/api.dart';
 import 'package:encointer_wallet/store/app.dart';
 import 'package:encointer_wallet/utils/format.dart';
 import 'package:encointer_wallet/l10n/l10.dart';
+import 'package:ew_keyring/ew_keyring.dart';
+import 'package:ew_test_keys/ew_test_keys.dart';
 
 class ContactPage extends StatefulWidget {
   const ContactPage({super.key});
@@ -42,7 +43,7 @@ class _Contact extends State<ContactPage> {
       });
       final l10n = context.l10n;
       final addr = _addressCtrl.text.replaceAll(' ', '');
-      final pubKey = Fmt.ss58Decode(addr).pubKey;
+      final pubKey = AddressUtils.addressToPubKeyHex(addr);
 
       final con = {
         'address': addr,
diff --git a/app/lib/page/profile/contacts/contacts_page.dart b/app/lib/page/profile/contacts/contacts_page.dart
index 252f46204..fde4a6fae 100644
--- a/app/lib/page/profile/contacts/contacts_page.dart
+++ b/app/lib/page/profile/contacts/contacts_page.dart
@@ -1,4 +1,3 @@
-import 'package:ew_test_keys/ew_test_keys.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_mobx/flutter_mobx.dart';
 import 'package:provider/provider.dart';
@@ -9,6 +8,8 @@ import 'package:encointer_wallet/page/profile/contacts/contact_page.dart';
 import 'package:encointer_wallet/store/app.dart';
 import 'package:encointer_wallet/utils/format.dart';
 import 'package:encointer_wallet/l10n/l10.dart';
+import 'package:ew_keyring/ew_keyring.dart';
+import 'package:ew_test_keys/ew_test_keys.dart';
 
 class ContactsPage extends StatelessWidget {
   const ContactsPage({super.key});
@@ -38,7 +39,7 @@ class ContactsPage extends StatelessWidget {
           itemCount: appStore.settings.contactList.length,
           itemBuilder: (BuildContext context, int index) {
             final contact = appStore.settings.contactList[index];
-            final address = Fmt.ss58Encode(contact.pubKey, prefix: appStore.settings.endpoint.ss58!);
+            final address = AddressUtils.pubKeyHexToAddress(contact.pubKey, prefix: appStore.settings.endpoint.ss58!);
             return ListTile(
               key: Key(contact.name),
               leading: AddressIcon(address, contact.pubKey, size: 45),
diff --git a/app/lib/page/qr_scan/qr_scan_service.dart b/app/lib/page/qr_scan/qr_scan_service.dart
index 8e6fc6b1b..c2aa94acd 100644
--- a/app/lib/page/qr_scan/qr_scan_service.dart
+++ b/app/lib/page/qr_scan/qr_scan_service.dart
@@ -8,7 +8,7 @@ import 'package:encointer_wallet/page/qr_scan/qr_codes/index.dart';
 import 'package:encointer_wallet/page/reap_voucher/reap_voucher_page.dart';
 import 'package:encointer_wallet/service/log/log_service.dart';
 import 'package:encointer_wallet/store/app.dart';
-import 'package:encointer_wallet/utils/format.dart';
+import 'package:ew_keyring/ew_keyring.dart';
 
 enum QrScannerContext {
   /// QrScanner was opened from the main page
@@ -92,7 +92,7 @@ Future<void> handleInvoiceQrCodeScan(BuildContext context, QrScannerContext scan
       'name': qrCode.data.label,
       'memo': '',
       'observation': false,
-      'pubKey': Fmt.ss58Decode(qrCode.data.account).pubKey
+      'pubKey': AddressUtils.addressToPubKeyHex(qrCode.data.account)
     };
     await context.read<AppStore>().settings.addContact(contactData);
   }
diff --git a/app/lib/service/substrate_api/encointer/encointer_api.dart b/app/lib/service/substrate_api/encointer/encointer_api.dart
index 0564cbaeb..195eb218f 100644
--- a/app/lib/service/substrate_api/encointer/encointer_api.dart
+++ b/app/lib/service/substrate_api/encointer/encointer_api.dart
@@ -1,11 +1,5 @@
 import 'dart:convert';
 
-import 'package:encointer_wallet/models/bazaar/businesses.dart';
-import 'package:encointer_wallet/models/bazaar/ipfs_product.dart';
-import 'package:encointer_wallet/models/bazaar/item_offered.dart';
-import 'package:encointer_wallet/models/faucet/faucet.dart';
-import 'package:ew_http/ew_http.dart';
-
 import 'package:encointer_wallet/config/consts.dart';
 import 'package:encointer_wallet/mocks/mock_bazaar_data.dart';
 import 'package:encointer_wallet/models/bazaar/account_business_tuple.dart';
@@ -16,6 +10,10 @@ import 'package:encointer_wallet/models/communities/community_metadata.dart';
 import 'package:encointer_wallet/models/encointer_balance_data/balance_entry.dart';
 import 'package:encointer_wallet/models/index.dart';
 import 'package:encointer_wallet/models/proof_of_attendance/proof_of_attendance.dart';
+import 'package:encointer_wallet/models/bazaar/businesses.dart';
+import 'package:encointer_wallet/models/bazaar/ipfs_product.dart';
+import 'package:encointer_wallet/models/bazaar/item_offered.dart';
+import 'package:encointer_wallet/models/faucet/faucet.dart';
 import 'package:encointer_wallet/service/encointer_feed/feed.dart' as feed;
 import 'package:encointer_wallet/service/log/log_service.dart';
 import 'package:encointer_wallet/service/substrate_api/core/dart_api.dart';
@@ -24,7 +22,8 @@ import 'package:encointer_wallet/service/substrate_api/encointer/encointer_dart_
 import 'package:encointer_wallet/service/substrate_api/encointer/no_tee_api.dart';
 import 'package:encointer_wallet/service/substrate_api/encointer/tee_proxy_api.dart';
 import 'package:encointer_wallet/store/app.dart';
-import 'package:encointer_wallet/utils/format.dart';
+import 'package:ew_http/ew_http.dart';
+import 'package:ew_keyring/ew_keyring.dart';
 import 'package:ew_polkadart/ew_polkadart.dart';
 import 'package:ew_substrate_fixed/substrate_fixed.dart';
 
@@ -153,7 +152,7 @@ class EncointerApi {
   /// Todo: Be able to handle pubKey and any address and transform it to the
   /// address with prefix 42. Needs #1105.
   Future<AggregatedAccountData> getAggregatedAccountData(CommunityIdentifier cid, String pubKey) async {
-    final address = Fmt.ss58Encode(pubKey);
+    final address = AddressUtils.pubKeyHexToAddress(pubKey);
 
     try {
       final accountData = await _dartApi.getAggregatedAccountData(cid, address);
diff --git a/app/lib/store/account/account.dart b/app/lib/store/account/account.dart
index cccaa299c..85781b5f0 100644
--- a/app/lib/store/account/account.dart
+++ b/app/lib/store/account/account.dart
@@ -10,6 +10,7 @@ import 'package:encointer_wallet/store/account/types/account_data.dart';
 import 'package:encointer_wallet/store/account/types/tx_status.dart';
 import 'package:encointer_wallet/store/app.dart';
 import 'package:encointer_wallet/utils/format.dart';
+import 'package:ew_keyring/ew_keyring.dart';
 
 part 'account.g.dart';
 
@@ -95,7 +96,7 @@ abstract class _AccountStore with Store {
   String get currentAddress {
     // Todo #1110: `currentAccountPubkey` should be non-nullable.
     if (currentAccountPubKey == null || currentAccountPubKey!.isEmpty) return '';
-    return Fmt.ss58Encode(currentAccountPubKey ?? '', prefix: rootStore.settings.endpoint.ss58!);
+    return AddressUtils.pubKeyHexToAddress(currentAccountPubKey ?? '', prefix: rootStore.settings.endpoint.ss58!);
   }
 
   @action
diff --git a/app/lib/store/app.dart b/app/lib/store/app.dart
index 085f83529..333b7d51f 100644
--- a/app/lib/store/app.dart
+++ b/app/lib/store/app.dart
@@ -4,12 +4,12 @@ import 'package:encointer_wallet/service/log/log_service.dart';
 import 'package:encointer_wallet/service/substrate_api/api.dart';
 import 'package:encointer_wallet/store/account/account.dart';
 import 'package:encointer_wallet/store/assets/assets.dart';
-import 'package:encointer_wallet/utils/format.dart';
 import 'package:encointer_wallet/store/chain/chain.dart';
 import 'package:encointer_wallet/store/data_update/data_update.dart';
 import 'package:encointer_wallet/store/encointer/encointer.dart';
 import 'package:encointer_wallet/store/settings.dart';
 import 'package:encointer_wallet/utils/local_storage.dart';
+import 'package:ew_keyring/ew_keyring.dart';
 
 part 'app.g.dart';
 
@@ -223,7 +223,7 @@ abstract class _AppStore with Store {
 
     if (pubKey != null) {
       // Todo: #1072
-      final address = Fmt.ss58Encode(pubKey, prefix: settings.endpoint.ss58!);
+      final address = AddressUtils.pubKeyHexToAddress(pubKey, prefix: settings.endpoint.ss58!);
       Log.d('setCurrentAccount: new current account address: $address', '_AppStore');
       await encointer.initializeUninitializedStores(address);
     }
diff --git a/app/lib/utils/format.dart b/app/lib/utils/format.dart
index 8d5c3c166..2cb29a985 100644
--- a/app/lib/utils/format.dart
+++ b/app/lib/utils/format.dart
@@ -2,17 +2,13 @@ import 'dart:convert';
 import 'dart:core';
 import 'dart:math';
 
-import 'package:base58check/base58.dart';
-import 'package:base58check/base58check.dart';
 import 'package:convert/convert.dart';
 import 'package:flutter/cupertino.dart';
-import 'package:flutter/foundation.dart';
 import 'package:intl/intl.dart';
 
 import 'package:encointer_wallet/service/log/log_service.dart';
 import 'package:encointer_wallet/store/account/types/account_data.dart';
 import 'package:encointer_wallet/l10n/l10.dart';
-import 'package:pointycastle/digests/blake2b.dart';
 
 class Fmt {
   static String passwordToEncryptKey(String password) {
@@ -256,84 +252,4 @@ class Fmt {
   static String degree(String degree, {int fixedPointFraction = 64, int fractionDisplay = 3}) {
     return (double.tryParse(degree) ?? 0.0).toStringAsFixed(fractionDisplay);
   }
-
-  static const base58Codec = Base58Codec(Base58CheckCodec.BITCOIN_ALPHABET);
-
-  /// Convert a pubKey into an SS58-address.
-  ///
-  /// Based on the rust version: https://github.com/paritytech/substrate/blob/48e7cb147cb9a27125fd2e82edbcf4d0ed5927c4/primitives/core/src/crypto.rs#L324
-  ///
-  /// Note: This only supports prefixes < 64, bigger prefixes require
-  /// special handling.
-  static String ss58Encode(String pubKey, {int prefix = 42}) {
-    if (prefix >= 64) throw Exception('prefixes >= 64 are currently not supported');
-
-    final body = Uint8List.fromList([prefix, ...Fmt.hexToBytes(pubKey)]);
-    final hash = blake2WithSs58Pre(body);
-
-    final complete = List<int>.from([...body, hash[0], hash[1]]);
-    return base58Codec.encode(complete);
-  }
-
-  /// General pubKey length used in substrate and Encointer.
-  static const pubKeyLen = 32;
-
-  /// Length of the checksum in an SS58-address.
-  static const checkSumLen = 2;
-
-  /// If the SS58-address has a prefix < 64 the prefix length is 1 else it is 2.
-  ///
-  /// All Encointer networks use the prefix 2 or 42, so we can only implement a subset of the
-  /// SS58-codec.
-  static const prefixLenForPrefixesSmallerThan64 = 1;
-
-  /// Convert an SS58-address into a pubKey.
-  ///
-  /// Based on the rust version: https://github.com/paritytech/substrate/blob/48e7cb147cb9a27125fd2e82edbcf4d0ed5927c4/primitives/core/src/crypto.rs#L269
-  ///
-  /// Note: This only supports prefixes < 64, bigger prefixes require
-  /// special handling.
-  static Ss58DecodeResult ss58Decode(String address) {
-    const prefixLen = prefixLenForPrefixesSmallerThan64;
-
-    final data = base58Codec.decode(address);
-    final prefix = data[0];
-
-    if (prefix >= 64) throw Exception('prefixes >= 64 are currently not supported');
-    if (data.length != prefixLen + pubKeyLen + checkSumLen) throw Exception('Bad address length ${data.length}');
-
-    final hash = blake2WithSs58Pre(Uint8List.fromList(data.sublist(0, pubKeyLen + prefixLen)));
-    final checksum = hash.sublist(0, checkSumLen);
-    final checksumData = data.sublist(pubKeyLen + prefixLen, pubKeyLen + prefixLen + checkSumLen);
-    if (!listEquals(checksumData, checksum)) throw Exception('Invalid checksum: $checksumData != $checksum');
-
-    return Ss58DecodeResult(bytesToHex(data.sublist(prefixLen, prefixLen + pubKeyLen)), prefix);
-  }
-
-  static final ss58Prefix = 'SS58PRE'.codeUnits;
-
-  /// Corresponds to the `ss58hash`: https://github.com/paritytech/substrate/blob/48e7cb147cb9a27125fd2e82edbcf4d0ed5927c4/primitives/core/src/crypto.rs#L374
-  static Uint8List blake2WithSs58Pre(Uint8List data) {
-    final ss58Pre = Uint8List.fromList(ss58Prefix);
-
-    final blake2 = Blake2bDigest()
-      ..init()
-      ..update(ss58Pre, 0, ss58Pre.length)
-      ..update(data, 0, data.length);
-
-    final hash = Uint8List(blake2.digestSize);
-    blake2.doFinal(hash, 0);
-
-    return hash;
-  }
-}
-
-class Ss58DecodeResult {
-  const Ss58DecodeResult(this.pubKey, this.prefix);
-
-  /// The pubKey corresponding to the input address.
-  final String pubKey;
-
-  /// The prefix of the input address.
-  final int prefix;
 }
diff --git a/app/pubspec.lock b/app/pubspec.lock
index d4ab2a358..5f3b13eac 100644
--- a/app/pubspec.lock
+++ b/app/pubspec.lock
@@ -9,6 +9,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "61.0.0"
+  adaptive_number:
+    dependency: transitive
+    description:
+      name: adaptive_number
+      sha256: "3a567544e9b5c9c803006f51140ad544aedc79604fd4f3f2c1380003f97c1d77"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.0"
   add_2_calendar:
     dependency: "direct main"
     description:
@@ -89,6 +97,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.0.0"
+  base_x:
+    dependency: transitive
+    description:
+      name: base_x
+      sha256: "519abcdafd637d4b6bd7e72fabd8f9264935f804b9b9f6c5d8411c7d52cbf8fd"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.1"
   bidi:
     dependency: transitive
     description:
@@ -97,14 +113,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.0.6"
-  bip39:
-    dependency: "direct main"
+  bip39_mnemonic:
+    dependency: transitive
     description:
-      name: bip39
-      sha256: de1ee27ebe7d96b84bb3a04a4132a0a3007dcdd5ad27dd14aa87a29d97c45edc
+      name: bip39_mnemonic
+      sha256: "24855a62fb9dd930f697063a274e084b0a574e1cc55ec270ca4756f579ab512c"
       url: "https://pub.dev"
     source: hosted
-    version: "1.0.6"
+    version: "3.0.6"
   boolean_selector:
     dependency: transitive
     description:
@@ -273,6 +289,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "3.0.3"
+  cryptography:
+    dependency: transitive
+    description:
+      name: cryptography
+      sha256: "5a31bbabc6d7e15cf5d823d99ee20074bd502f2376cc49eec73bf34c9a4f7f89"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.6.1"
   csslib:
     dependency: transitive
     description:
@@ -361,6 +385,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "5.0.6"
+  ed25519_edwards:
+    dependency: transitive
+    description:
+      name: ed25519_edwards
+      sha256: "6ce0112d131327ec6d42beede1e5dfd526069b18ad45dcf654f15074ad9276cd"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.3.1"
   equatable:
     dependency: transitive
     description:
@@ -376,6 +408,13 @@ packages:
       relative: true
     source: path
     version: "0.1.0+1"
+  ew_keyring:
+    dependency: "direct main"
+    description:
+      path: "../packages/ew_keyring"
+      relative: true
+    source: path
+    version: "0.1.0+1"
   ew_polkadart:
     dependency: "direct main"
     description:
@@ -473,6 +512,14 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  flutter_curve25519:
+    dependency: transitive
+    description:
+      name: flutter_curve25519
+      sha256: d2d196e51de878f5f0289d2d7c5e93dc0c62ccda7ca98c7e47b5a58a6851b861
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.1.2"
   flutter_driver:
     dependency: "direct dev"
     description: flutter
@@ -682,14 +729,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.3.1"
-  hex:
-    dependency: transitive
-    description:
-      name: hex
-      sha256: "4e7cd54e4b59ba026432a6be2dd9d96e4c5205725194997193bf871703b82c4a"
-      url: "https://pub.dev"
-    source: hosted
-    version: "0.2.0"
   html:
     dependency: transitive
     description:
@@ -1243,7 +1282,7 @@ packages:
     source: hosted
     version: "2.1.4"
   pointycastle:
-    dependency: "direct main"
+    dependency: transitive
     description:
       name: pointycastle
       sha256: "7c1e5f0d23c9016c5bbd8b1473d0d3fb3fc851b876046039509e18e0c7485f2c"
@@ -1259,6 +1298,14 @@ packages:
       url: "https://github.com/encointer/polkadart"
     source: git
     version: "0.2.2"
+  polkadart_keyring:
+    dependency: transitive
+    description:
+      name: polkadart_keyring
+      sha256: ba568c22f3ff2a77c35fe0d53845212c1a433f99645e286550d1889dbb437d3c
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.2.1"
   polkadart_scale_codec:
     dependency: transitive
     description:
@@ -1584,6 +1631,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.10.0"
+  ss58:
+    dependency: transitive
+    description:
+      name: ss58
+      sha256: b24d2713597b83708ef30daea5a565dba8bc9129031b30c025069e168301ae5e
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.2"
   stack_trace:
     dependency: transitive
     description:
@@ -1616,6 +1671,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.2.0"
+  substrate_bip39:
+    dependency: transitive
+    description:
+      name: substrate_bip39
+      sha256: "78b45e9959c3394ecc9b56d9bfb07e11f93db70d273eccd93e3e4d84b28f11c0"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.2.0"
   substrate_metadata:
     dependency: transitive
     description:
@@ -1704,6 +1767,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.3.1"
+  unorm_dart:
+    dependency: transitive
+    description:
+      name: unorm_dart
+      sha256: "5b35bff83fce4d76467641438f9e867dc9bcfdb8c1694854f230579d68cd8f4b"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.2.0"
   upgrader:
     dependency: "direct main"
     description:
@@ -1977,5 +2048,5 @@ packages:
     source: hosted
     version: "1.1.2+6"
 sdks:
-  dart: ">=3.1.0-185.0.dev <4.0.0"
+  dart: ">=3.1.0 <4.0.0"
   flutter: ">=3.13.8"
diff --git a/app/pubspec.yaml b/app/pubspec.yaml
index abc2890ab..ed216e66b 100644
--- a/app/pubspec.yaml
+++ b/app/pubspec.yaml
@@ -26,8 +26,6 @@ dependencies:
   # intl - format numbers
   intl: ^0.18.1
   json_annotation: ^4.8.1
-  bip39: ^1.0.6 # Todo: #1268: replace with alternative package
-  pointycastle: ^3.7.3
   # state management with mobx
   mobx: ^2.2.1
   flutter_mobx: ^2.1.0+1
@@ -82,6 +80,8 @@ dependencies:
     path: ../packages/ew_storage/
   ew_http:
     path: ../packages/ew_http/
+  ew_keyring:
+    path: ../packages/ew_keyring/
   ew_polkadart:
     path: ../packages/ew_polkadart/
   ew_substrate_fixed:
diff --git a/app/pubspec_overrides.yaml b/app/pubspec_overrides.yaml
index 3b9390a57..a05738e8b 100644
--- a/app/pubspec_overrides.yaml
+++ b/app/pubspec_overrides.yaml
@@ -1,7 +1,9 @@
-# melos_managed_dependency_overrides: ew_http,ew_storage,ew_polkadart,ew_substrate_fixed
+# melos_managed_dependency_overrides: ew_http,ew_storage,ew_polkadart,ew_substrate_fixed,ew_keyring
 dependency_overrides:
   ew_http:
     path: ../packages/ew_http
+  ew_keyring:
+    path: ../packages/ew_keyring
   ew_polkadart:
     path: ../packages/ew_polkadart
   ew_storage:
diff --git a/app/test/utils/format_test.dart b/app/test/utils/format_test.dart
deleted file mode 100644
index 344d8c916..000000000
--- a/app/test/utils/format_test.dart
+++ /dev/null
@@ -1,164 +0,0 @@
-import 'dart:typed_data';
-
-import 'package:encointer_wallet/utils/format.dart';
-import 'package:flutter_test/flutter_test.dart';
-
-void main() {
-  group('SS58', () {
-    // Alice pubKey, double check with `subkey inspect //Alice`
-    const alice = '0xd43593c715fdd31c61141abd04a99fd6822c8558854ccde39a5684e7a56da27d';
-
-    group('Encode', () {
-      test('ss58Encode works for prefix 2', () {
-        // Prefix of the encointer kusama-parachain (production) and rococo-parachain (testnet).
-        // Reproduce with `subkey inspect //Alice -n kusama`
-        expect(Fmt.ss58Encode(alice, prefix: 2), 'HNZata7iMYWmk5RvZRTiAsSDhV8366zq2YGb3tLH5Upf74F');
-      });
-
-      test('ss58Encode works for prefix 42', () {
-        // Prefix of the other encointer testnets.
-        // Reproduce with `subkey inspect //Alice`
-        expect(Fmt.ss58Encode(alice), '5GrwvaEF5zXb26Fz9rcQpDWS57CtERHpNehXCPcNoHGKutQY');
-      });
-
-      test('ss58Encode fails for prefix >= 64', () {
-        try {
-          Fmt.ss58Encode(alice, prefix: 64);
-        } catch (e) {
-          expect(e.toString(), 'Exception: prefixes >= 64 are currently not supported');
-        }
-      });
-    });
-
-    group('Decode', () {
-      test('ss58Decode works for prefix 2', () {
-        final result = Fmt.ss58Decode('HNZata7iMYWmk5RvZRTiAsSDhV8366zq2YGb3tLH5Upf74F');
-        expect(result.prefix, 2);
-        expect(result.pubKey, alice);
-      });
-
-      test('ss58Decode works for prefix 42', () {
-        final result = Fmt.ss58Decode('5GrwvaEF5zXb26Fz9rcQpDWS57CtERHpNehXCPcNoHGKutQY');
-        expect(result.prefix, 42);
-        expect(result.pubKey, alice);
-      });
-
-      test('ss58Decode fails for wrong checksum', () {
-        try {
-          // Replaced last letter: Y -> Q
-          Fmt.ss58Decode('5GrwvaEF5zXb26Fz9rcQpDWS57CtERHpNehXCPcNoHGKutQQ');
-        } catch (e) {
-          expect(e.toString(), 'Exception: Invalid checksum: [29, 25] != [29, 33]');
-        }
-      });
-
-      test('ss58Decode fails for prefix too big', () {
-        try {
-          // Removed last letter. I don't really know how to trigger specific prefixes.
-          Fmt.ss58Decode('5GrwvaEF5zXb26Fz9rcQpDWS57CtERHpNehXCPcNoHGKutQ');
-        } catch (e) {
-          expect(e.toString(), 'Exception: prefixes >= 64 are currently not supported');
-        }
-      });
-
-      // I could not find out how to trigger wrong length yet...
-    });
-
-    test('blake2bWithSs58Pre works', () {
-      final hello = Uint8List.fromList('hello'.codeUnits);
-      final hash = Fmt.blake2WithSs58Pre(hello);
-      expect(hash, rustHelloHashWithPrefix);
-    });
-
-    test('SS58PRE matches rust value', () {
-      expect(
-        Fmt.ss58Prefix,
-        // Corresponds to rust's: `const PREFIX: &[u8] = b"SS58PRE";`
-        List<int>.from([83, 83, 53, 56, 80, 82, 69]),
-      );
-    });
-  });
-}
-
-/// This is the value obtained by the following rust function:
-///
-/// ```rust
-/// const PREFIX: &[u8] = b"SS58PRE";
-///
-/// fn blake2b(data: &[u8]) -> Vec<u8> {
-///     use blake2::{Blake2b512, Digest};
-///
-///     let mut ctx = Blake2b512::new();
-///     ctx.update(PREFIX);
-///     ctx.update(data);
-///     ctx.finalize().to_vec()
-/// }
-///
-/// blake2b(b"hello")
-/// ```
-final rustHelloHashWithPrefix = List<int>.from([
-  88,
-  202,
-  6,
-  102,
-  51,
-  141,
-  3,
-  199,
-  32,
-  83,
-  28,
-  81,
-  100,
-  25,
-  199,
-  244,
-  15,
-  229,
-  18,
-  218,
-  73,
-  28,
-  53,
-  88,
-  44,
-  37,
-  167,
-  97,
-  168,
-  74,
-  163,
-  176,
-  12,
-  174,
-  194,
-  191,
-  48,
-  186,
-  230,
-  104,
-  194,
-  149,
-  101,
-  217,
-  8,
-  150,
-  232,
-  70,
-  164,
-  72,
-  101,
-  229,
-  6,
-  87,
-  151,
-  185,
-  173,
-  118,
-  38,
-  146,
-  30,
-  102,
-  65,
-  187
-]);
diff --git a/packages/ew_keyring/README.md b/packages/ew_keyring/README.md
new file mode 100644
index 000000000..d010a56dc
--- /dev/null
+++ b/packages/ew_keyring/README.md
@@ -0,0 +1,3 @@
+# EW Encointer Keyring
+
+Encointer Keyring Package
diff --git a/packages/ew_keyring/analysis_options.yaml b/packages/ew_keyring/analysis_options.yaml
new file mode 100644
index 000000000..3ff4f2b81
--- /dev/null
+++ b/packages/ew_keyring/analysis_options.yaml
@@ -0,0 +1,7 @@
+include: package:very_good_analysis/analysis_options.3.1.0.yaml
+
+linter:
+  rules:
+    public_member_api_docs: false
+    lines_longer_than_80_chars: false
+    sort_pub_dependencies: false
\ No newline at end of file
diff --git a/packages/ew_keyring/lib/ew_keyring.dart b/packages/ew_keyring/lib/ew_keyring.dart
new file mode 100644
index 000000000..502a4d186
--- /dev/null
+++ b/packages/ew_keyring/lib/ew_keyring.dart
@@ -0,0 +1,7 @@
+/// Manages the cryptographic keys on the end device
+library ew_keyring;
+
+// Don't export keyring as it doesn't support sr25519 yet.
+// export 'src/keyring.dart';
+export 'src/address_utils.dart' show Address, AddressUtils, AddressExtension;
+export 'src/validate_keys.dart' show ValidateKeys;
diff --git a/packages/ew_keyring/lib/src/address_utils.dart b/packages/ew_keyring/lib/src/address_utils.dart
new file mode 100644
index 000000000..300fd734c
--- /dev/null
+++ b/packages/ew_keyring/lib/src/address_utils.dart
@@ -0,0 +1,38 @@
+import 'dart:typed_data';
+
+import 'package:convert/convert.dart' show hex;
+import 'package:ss58/ss58.dart' show Address;
+
+export 'package:ss58/ss58.dart' show Address;
+
+extension AddressExtension on Address {
+  String toPubHex() {
+    return '0x${hex.encode(pubkey)}';
+  }
+}
+
+abstract class AddressUtils {
+  /// Encode a public key to an SS58 address.
+  ///
+  /// The default SS58 address prefix is 42.
+  static String pubKeyToAddress(List<int> pubKey, {int prefix = 42}) {
+    return Address(prefix: prefix, pubkey: Uint8List.fromList(pubKey)).encode();
+  }
+
+  /// Encode a public key to an SS58 address.
+  ///
+  /// The default SS58 address prefix is 42.
+  static String pubKeyHexToAddress(String pubKey, {int prefix = 42}) {
+    final pub = hex.decode(pubKey.replaceFirst('0x', ''));
+    return Address(prefix: prefix, pubkey: Uint8List.fromList(pub)).encode();
+  }
+
+  /// Decode an SS58 address to its public key.
+  static Uint8List addressToPubKey(String address) {
+    return Address.decode(address).pubkey;
+  }
+
+  static String addressToPubKeyHex(String address) {
+    return Address.decode(address).toPubHex();
+  }
+}
diff --git a/packages/ew_keyring/lib/src/keyring.dart b/packages/ew_keyring/lib/src/keyring.dart
new file mode 100644
index 000000000..8ae028e81
--- /dev/null
+++ b/packages/ew_keyring/lib/src/keyring.dart
@@ -0,0 +1,64 @@
+import 'package:ew_keyring/src/keyring_data.dart';
+import 'package:polkadart_keyring/polkadart_keyring.dart';
+
+/// The public key (as a list of integers).
+typedef Pubkey = String;
+
+/// Keyring that is stored on the devices encrypted storage.
+///
+/// Note: This can't yet be used by encointer. It uses ed25519,
+/// which is unfortunately not compatible with encointer. We have
+/// to wait for sr25519 support from polkadart.
+class EncointerKeyring {
+  EncointerKeyring()
+      : keyring = Keyring(),
+        accounts = {};
+
+  static Future<EncointerKeyring> fromAccounts(List<KeyringAccount> accounts) async {
+    final k = EncointerKeyring();
+    await k.addAccounts(accounts);
+    return k;
+  }
+
+  final Keyring keyring;
+  final Map<Pubkey, KeyringAccount> accounts;
+
+  Future<void> addAccounts(List<KeyringAccount> keyringAccounts) async {
+    await Future.wait(keyringAccounts.map(addAccount));
+  }
+
+  Future<void> addAccount(KeyringAccount keyringAccount) async {
+    final pair = await KeyPair.fromMnemonic(keyringAccount.seed);
+    keyring.add(pair);
+    // same as what keyring does internally.
+    accounts[_publicKey(pair).toString()] = keyringAccount;
+  }
+
+  KeyPair getPairByPublicKey(List<int> publicKey) {
+    return keyring.getByPublicKey(publicKey);
+  }
+
+  KeyringAccount getAccountByPublicKey(List<int> publicKey) {
+    if (accounts[publicKey.toString()] == null) {
+      throw ArgumentError('KeyPair with provided key, not found.');
+    }
+    return accounts[publicKey.toString()]!;
+  }
+
+  void remove(List<int> publicKey) {
+    keyring.pairs.removeByPublicKey(publicKey);
+    accounts.remove(publicKey.toString());
+  }
+
+  /// Remove all key pairs from the keyring.
+  void clear() {
+    keyring.clear();
+    accounts.clear();
+  }
+
+  /// Get a List<int> as string, this is the same as the keyring internally uses
+  /// to add a pair.
+  List<int> _publicKey(KeyPair pair) {
+    return keyring.decodeAddress(pair.address);
+  }
+}
diff --git a/packages/ew_keyring/lib/src/keyring_data.dart b/packages/ew_keyring/lib/src/keyring_data.dart
new file mode 100644
index 000000000..b654d0913
--- /dev/null
+++ b/packages/ew_keyring/lib/src/keyring_data.dart
@@ -0,0 +1,34 @@
+import 'package:ew_keyring/src/validate_keys.dart';
+import 'package:json_annotation/json_annotation.dart';
+
+part 'keyring_data.g.dart';
+
+@JsonSerializable()
+class KeyringAccount {
+  KeyringAccount(this.name, this.seed) : type = getSeedTypeFromString(seed);
+
+  final String name;
+  final SeedType type;
+  final String seed;
+
+  static KeyringAccount fromJson(Map<String, dynamic> json) => _$KeyringAccountFromJson(json);
+  static Map<String, dynamic> toJson(KeyringAccount acc) => _$KeyringAccountToJson(acc);
+}
+
+SeedType getSeedTypeFromString(String seed) {
+  if (ValidateKeys.isRawSeed(seed)) {
+    return SeedType.raw;
+  } else if (ValidateKeys.isPrivateKey(seed)) {
+    return SeedType.privateKey;
+  } else if (ValidateKeys.validateMnemonic(seed)) {
+    return SeedType.mnemonic;
+  } else {
+    throw Exception('invalid seed: $seed');
+  }
+}
+
+enum SeedType {
+  raw,
+  privateKey,
+  mnemonic,
+}
diff --git a/packages/ew_keyring/lib/src/keyring_data.g.dart b/packages/ew_keyring/lib/src/keyring_data.g.dart
new file mode 100644
index 000000000..4a0542e84
--- /dev/null
+++ b/packages/ew_keyring/lib/src/keyring_data.g.dart
@@ -0,0 +1,17 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'keyring_data.dart';
+
+// **************************************************************************
+// JsonSerializableGenerator
+// **************************************************************************
+
+KeyringAccount _$KeyringAccountFromJson(Map<String, dynamic> json) => KeyringAccount(
+      json['name'] as String,
+      json['seed'] as String,
+    );
+
+Map<String, dynamic> _$KeyringAccountToJson(KeyringAccount instance) => <String, dynamic>{
+      'name': instance.name,
+      'seed': instance.seed,
+    };
diff --git a/app/lib/utils/validate_keys.dart b/packages/ew_keyring/lib/src/validate_keys.dart
similarity index 81%
rename from app/lib/utils/validate_keys.dart
rename to packages/ew_keyring/lib/src/validate_keys.dart
index ff25e588c..f7187095b 100644
--- a/app/lib/utils/validate_keys.dart
+++ b/packages/ew_keyring/lib/src/validate_keys.dart
@@ -1,4 +1,4 @@
-import 'package:bip39/bip39.dart' as bip39;
+import 'package:substrate_bip39/substrate_bip39.dart';
 
 class ValidateKeys {
   static bool isPrivateKey(String privateKey) {
@@ -34,6 +34,16 @@ class ValidateKeys {
   static bool validateMnemonic(String mnemonic) {
     final input = mnemonic.trim();
     final len = input.split(' ').length;
-    return (len == 12 || len == 24) && bip39.validateMnemonic(input);
+
+    if (!(len == 12 || len == 24)) {
+      return false;
+    }
+
+    try {
+      Mnemonic.fromSentence(input, Language.english);
+      return true;
+    } catch (_) {
+      return false;
+    }
   }
 }
diff --git a/packages/ew_keyring/pubspec.lock b/packages/ew_keyring/pubspec.lock
new file mode 100644
index 000000000..e64796378
--- /dev/null
+++ b/packages/ew_keyring/pubspec.lock
@@ -0,0 +1,645 @@
+# Generated by pub
+# See https://dart.dev/tools/pub/glossary#lockfile
+packages:
+  _fe_analyzer_shared:
+    dependency: transitive
+    description:
+      name: _fe_analyzer_shared
+      sha256: ae92f5d747aee634b87f89d9946000c2de774be1d6ac3e58268224348cd0101a
+      url: "https://pub.dev"
+    source: hosted
+    version: "61.0.0"
+  adaptive_number:
+    dependency: transitive
+    description:
+      name: adaptive_number
+      sha256: "3a567544e9b5c9c803006f51140ad544aedc79604fd4f3f2c1380003f97c1d77"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.0"
+  analyzer:
+    dependency: transitive
+    description:
+      name: analyzer
+      sha256: ea3d8652bda62982addfd92fdc2d0214e5f82e43325104990d4f4c4a2a313562
+      url: "https://pub.dev"
+    source: hosted
+    version: "5.13.0"
+  args:
+    dependency: transitive
+    description:
+      name: args
+      sha256: "4cab82a83ffef80b262ddedf47a0a8e56ee6fbf7fe21e6e768b02792034dd440"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.0"
+  async:
+    dependency: transitive
+    description:
+      name: async
+      sha256: bfe67ef28df125b7dddcea62755991f807aa39a2492a23e1550161692950bbe0
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.10.0"
+  base_x:
+    dependency: transitive
+    description:
+      name: base_x
+      sha256: "519abcdafd637d4b6bd7e72fabd8f9264935f804b9b9f6c5d8411c7d52cbf8fd"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.1"
+  bip39_mnemonic:
+    dependency: transitive
+    description:
+      name: bip39_mnemonic
+      sha256: "24855a62fb9dd930f697063a274e084b0a574e1cc55ec270ca4756f579ab512c"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.6"
+  boolean_selector:
+    dependency: transitive
+    description:
+      name: boolean_selector
+      sha256: "6cfb5af12253eaf2b368f07bacc5a80d1301a071c73360d746b7f2e32d762c66"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.1"
+  build:
+    dependency: transitive
+    description:
+      name: build
+      sha256: "80184af8b6cb3e5c1c4ec6d8544d27711700bc3e6d2efad04238c7b5290889f0"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.1"
+  build_config:
+    dependency: transitive
+    description:
+      name: build_config
+      sha256: bf80fcfb46a29945b423bd9aad884590fb1dc69b330a4d4700cac476af1708d1
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.1"
+  build_daemon:
+    dependency: transitive
+    description:
+      name: build_daemon
+      sha256: "5f02d73eb2ba16483e693f80bee4f088563a820e47d1027d4cdfe62b5bb43e65"
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.0.0"
+  build_resolvers:
+    dependency: transitive
+    description:
+      name: build_resolvers
+      sha256: "64e12b0521812d1684b1917bc80945625391cb9bdd4312536b1d69dcb6133ed8"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.1"
+  build_runner:
+    dependency: "direct dev"
+    description:
+      name: build_runner
+      sha256: "10c6bcdbf9d049a0b666702cf1cee4ddfdc38f02a19d35ae392863b47519848b"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.6"
+  build_runner_core:
+    dependency: transitive
+    description:
+      name: build_runner_core
+      sha256: "30859c90e9ddaccc484f56303931f477b1f1ba2bab74aa32ed5d6ce15870f8cf"
+      url: "https://pub.dev"
+    source: hosted
+    version: "7.2.8"
+  built_collection:
+    dependency: transitive
+    description:
+      name: built_collection
+      sha256: "376e3dd27b51ea877c28d525560790aee2e6fbb5f20e2f85d5081027d94e2100"
+      url: "https://pub.dev"
+    source: hosted
+    version: "5.1.1"
+  built_value:
+    dependency: transitive
+    description:
+      name: built_value
+      sha256: "723b4021e903217dfc445ec4cf5b42e27975aece1fc4ebbc1ca6329c2d9fb54e"
+      url: "https://pub.dev"
+    source: hosted
+    version: "8.7.0"
+  checked_yaml:
+    dependency: transitive
+    description:
+      name: checked_yaml
+      sha256: feb6bed21949061731a7a75fc5d2aa727cf160b91af9a3e464c5e3a32e28b5ff
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.3"
+  code_builder:
+    dependency: transitive
+    description:
+      name: code_builder
+      sha256: "1be9be30396d7e4c0db42c35ea6ccd7cc6a1e19916b5dc64d6ac216b5544d677"
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.7.0"
+  collection:
+    dependency: transitive
+    description:
+      name: collection
+      sha256: f092b211a4319e98e5ff58223576de6c2803db36221657b46c82574721240687
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.17.2"
+  convert:
+    dependency: "direct main"
+    description:
+      name: convert
+      sha256: "0f08b14755d163f6e2134cb58222dd25ea2a2ee8a195e53983d57c075324d592"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.1.1"
+  coverage:
+    dependency: transitive
+    description:
+      name: coverage
+      sha256: "2fb815080e44a09b85e0f2ca8a820b15053982b2e714b59267719e8a9ff17097"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.6.3"
+  crypto:
+    dependency: transitive
+    description:
+      name: crypto
+      sha256: aa274aa7774f8964e4f4f38cc994db7b6158dd36e9187aaceaddc994b35c6c67
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.2"
+  cryptography:
+    dependency: transitive
+    description:
+      name: cryptography
+      sha256: df156c5109286340817d21fa7b62f9140f17915077127dd70f8bd7a2a0997a35
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.5.0"
+  dart_style:
+    dependency: transitive
+    description:
+      name: dart_style
+      sha256: "1efa911ca7086affd35f463ca2fc1799584fb6aa89883cf0af8e3664d6a02d55"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.3.2"
+  ed25519_edwards:
+    dependency: transitive
+    description:
+      name: ed25519_edwards
+      sha256: "6ce0112d131327ec6d42beede1e5dfd526069b18ad45dcf654f15074ad9276cd"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.3.1"
+  equatable:
+    dependency: transitive
+    description:
+      name: equatable
+      sha256: c2b87cb7756efdf69892005af546c56c0b5037f54d2a88269b4f347a505e3ca2
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.5"
+  file:
+    dependency: transitive
+    description:
+      name: file
+      sha256: "1b92bec4fc2a72f59a8e15af5f52cd441e4a7860b49499d69dfa817af20e925d"
+      url: "https://pub.dev"
+    source: hosted
+    version: "6.1.4"
+  fixnum:
+    dependency: transitive
+    description:
+      name: fixnum
+      sha256: "25517a4deb0c03aa0f32fd12db525856438902d9c16536311e76cdc57b31d7d1"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.0"
+  flutter_curve25519:
+    dependency: transitive
+    description:
+      name: flutter_curve25519
+      sha256: d2d196e51de878f5f0289d2d7c5e93dc0c62ccda7ca98c7e47b5a58a6851b861
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.1.2"
+  frontend_server_client:
+    dependency: transitive
+    description:
+      name: frontend_server_client
+      sha256: "408e3ca148b31c20282ad6f37ebfa6f4bdc8fede5b74bc2f08d9d92b55db3612"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.2.0"
+  glob:
+    dependency: transitive
+    description:
+      name: glob
+      sha256: "4515b5b6ddb505ebdd242a5f2cc5d22d3d6a80013789debfbda7777f47ea308c"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.1"
+  graphs:
+    dependency: transitive
+    description:
+      name: graphs
+      sha256: aedc5a15e78fc65a6e23bcd927f24c64dd995062bcd1ca6eda65a3cff92a4d19
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.3.1"
+  http_multi_server:
+    dependency: transitive
+    description:
+      name: http_multi_server
+      sha256: "97486f20f9c2f7be8f514851703d0119c3596d14ea63227af6f7a481ef2b2f8b"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.2.1"
+  http_parser:
+    dependency: transitive
+    description:
+      name: http_parser
+      sha256: "2aa08ce0341cc9b354a498388e30986515406668dbcc4f7c950c3e715496693b"
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.0.2"
+  io:
+    dependency: transitive
+    description:
+      name: io
+      sha256: "2ec25704aba361659e10e3e5f5d672068d332fc8ac516421d483a11e5cbd061e"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.4"
+  js:
+    dependency: transitive
+    description:
+      name: js
+      sha256: f2c445dce49627136094980615a031419f7f3eb393237e4ecd97ac15dea343f3
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.6.7"
+  json_annotation:
+    dependency: "direct main"
+    description:
+      name: json_annotation
+      sha256: b10a7b2ff83d83c777edba3c6a0f97045ddadd56c944e1a23a3fdf43a1bf4467
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.8.1"
+  json_serializable:
+    dependency: "direct dev"
+    description:
+      name: json_serializable
+      sha256: aa1f5a8912615733e0fdc7a02af03308933c93235bdc8d50d0b0c8a8ccb0b969
+      url: "https://pub.dev"
+    source: hosted
+    version: "6.7.1"
+  logging:
+    dependency: transitive
+    description:
+      name: logging
+      sha256: "04094f2eb032cbb06c6f6e8d3607edcfcb0455e2bb6cbc010cb01171dcb64e6d"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.1"
+  matcher:
+    dependency: transitive
+    description:
+      name: matcher
+      sha256: "1803e76e6653768d64ed8ff2e1e67bea3ad4b923eb5c56a295c3e634bad5960e"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.12.16"
+  meta:
+    dependency: transitive
+    description:
+      name: meta
+      sha256: "3c74dbf8763d36539f114c799d8a2d87343b5067e9d796ca22b5eb8437090ee3"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.9.1"
+  mime:
+    dependency: transitive
+    description:
+      name: mime
+      sha256: e4ff8e8564c03f255408decd16e7899da1733852a9110a58fe6d1b817684a63e
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.4"
+  node_preamble:
+    dependency: transitive
+    description:
+      name: node_preamble
+      sha256: "8ebdbaa3b96d5285d068f80772390d27c21e1fa10fb2df6627b1b9415043608d"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.1"
+  package_config:
+    dependency: transitive
+    description:
+      name: package_config
+      sha256: "1c5b77ccc91e4823a5af61ee74e6b972db1ef98c2ff5a18d3161c982a55448bd"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.0"
+  path:
+    dependency: transitive
+    description:
+      name: path
+      sha256: "8829d8a55c13fc0e37127c29fedf290c102f4e40ae94ada574091fe0ff96c917"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.8.3"
+  pointycastle:
+    dependency: transitive
+    description:
+      name: pointycastle
+      sha256: "7c1e5f0d23c9016c5bbd8b1473d0d3fb3fc851b876046039509e18e0c7485f2c"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.7.3"
+  polkadart_keyring:
+    dependency: "direct main"
+    description:
+      name: polkadart_keyring
+      sha256: ba568c22f3ff2a77c35fe0d53845212c1a433f99645e286550d1889dbb437d3c
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.2.1"
+  polkadart_scale_codec:
+    dependency: transitive
+    description:
+      name: polkadart_scale_codec
+      sha256: "75289b2f53c6cf997dd68945d959fee596c1e47bba3dedba22a6e95646df893c"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.2"
+  pool:
+    dependency: transitive
+    description:
+      name: pool
+      sha256: "20fe868b6314b322ea036ba325e6fc0711a22948856475e2c2b6306e8ab39c2a"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.5.1"
+  pub_semver:
+    dependency: transitive
+    description:
+      name: pub_semver
+      sha256: "307de764d305289ff24ad257ad5c5793ce56d04947599ad68b3baa124105fc17"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.3"
+  pubspec_parse:
+    dependency: transitive
+    description:
+      name: pubspec_parse
+      sha256: c63b2876e58e194e4b0828fcb080ad0e06d051cb607a6be51a9e084f47cb9367
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.2.3"
+  quiver:
+    dependency: transitive
+    description:
+      name: quiver
+      sha256: b1c1ac5ce6688d77f65f3375a9abb9319b3cb32486bdc7a1e0fdf004d7ba4e47
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.2.1"
+  shelf:
+    dependency: transitive
+    description:
+      name: shelf
+      sha256: c24a96135a2ccd62c64b69315a14adc5c3419df63b4d7c05832a346fdb73682c
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.4.0"
+  shelf_packages_handler:
+    dependency: transitive
+    description:
+      name: shelf_packages_handler
+      sha256: aef74dc9195746a384843102142ab65b6a4735bb3beea791e63527b88cc83306
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.1"
+  shelf_static:
+    dependency: transitive
+    description:
+      name: shelf_static
+      sha256: e792b76b96a36d4a41b819da593aff4bdd413576b3ba6150df5d8d9996d2e74c
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.1"
+  shelf_web_socket:
+    dependency: transitive
+    description:
+      name: shelf_web_socket
+      sha256: a988c0e8d8ffbdb8a28aa7ec8e449c260f3deb808781fe1284d22c5bba7156e8
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.3"
+  source_gen:
+    dependency: transitive
+    description:
+      name: source_gen
+      sha256: fc0da689e5302edb6177fdd964efcb7f58912f43c28c2047a808f5bfff643d16
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.4.0"
+  source_helper:
+    dependency: transitive
+    description:
+      name: source_helper
+      sha256: "6adebc0006c37dd63fe05bca0a929b99f06402fc95aa35bf36d67f5c06de01fd"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.3.4"
+  source_map_stack_trace:
+    dependency: transitive
+    description:
+      name: source_map_stack_trace
+      sha256: "84cf769ad83aa6bb61e0aa5a18e53aea683395f196a6f39c4c881fb90ed4f7ae"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.1"
+  source_maps:
+    dependency: transitive
+    description:
+      name: source_maps
+      sha256: "490098075234dcedb83c5d949b4c93dad5e6b7702748de000be2b57b8e6b2427"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.10.11"
+  source_span:
+    dependency: transitive
+    description:
+      name: source_span
+      sha256: dd904f795d4b4f3b870833847c461801f6750a9fa8e61ea5ac53f9422b31f250
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.9.1"
+  ss58:
+    dependency: "direct main"
+    description:
+      name: ss58
+      sha256: b24d2713597b83708ef30daea5a565dba8bc9129031b30c025069e168301ae5e
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.2"
+  stack_trace:
+    dependency: transitive
+    description:
+      name: stack_trace
+      sha256: c3c7d8edb15bee7f0f74debd4b9c5f3c2ea86766fe4178eb2a18eb30a0bdaed5
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.11.0"
+  stream_channel:
+    dependency: transitive
+    description:
+      name: stream_channel
+      sha256: "83615bee9045c1d322bbbd1ba209b7a749c2cbcdcb3fdd1df8eb488b3279c1c8"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.1"
+  stream_transform:
+    dependency: transitive
+    description:
+      name: stream_transform
+      sha256: "14a00e794c7c11aa145a170587321aedce29769c08d7f58b1d141da75e3b1c6f"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.0"
+  string_scanner:
+    dependency: transitive
+    description:
+      name: string_scanner
+      sha256: "556692adab6cfa87322a115640c11f13cb77b3f076ddcc5d6ae3c20242bedcde"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.2.0"
+  substrate_bip39:
+    dependency: "direct main"
+    description:
+      name: substrate_bip39
+      sha256: "78b45e9959c3394ecc9b56d9bfb07e11f93db70d273eccd93e3e4d84b28f11c0"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.2.0"
+  term_glyph:
+    dependency: transitive
+    description:
+      name: term_glyph
+      sha256: a29248a84fbb7c79282b40b8c72a1209db169a2e0542bce341da992fe1bc7e84
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.2.1"
+  test:
+    dependency: "direct dev"
+    description:
+      name: test
+      sha256: "13b41f318e2a5751c3169137103b60c584297353d4b1761b66029bae6411fe46"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.24.3"
+  test_api:
+    dependency: transitive
+    description:
+      name: test_api
+      sha256: "75760ffd7786fffdfb9597c35c5b27eaeec82be8edfb6d71d32651128ed7aab8"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.6.0"
+  test_core:
+    dependency: transitive
+    description:
+      name: test_core
+      sha256: "99806e9e6d95c7b059b7a0fc08f07fc53fabe54a829497f0d9676299f1e8637e"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.5.3"
+  timing:
+    dependency: transitive
+    description:
+      name: timing
+      sha256: "70a3b636575d4163c477e6de42f247a23b315ae20e86442bebe32d3cabf61c32"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.1"
+  typed_data:
+    dependency: transitive
+    description:
+      name: typed_data
+      sha256: "26f87ade979c47a150c9eaab93ccd2bebe70a27dc0b4b29517f2904f04eb11a5"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.3.1"
+  unorm_dart:
+    dependency: transitive
+    description:
+      name: unorm_dart
+      sha256: "5b35bff83fce4d76467641438f9e867dc9bcfdb8c1694854f230579d68cd8f4b"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.2.0"
+  very_good_analysis:
+    dependency: "direct dev"
+    description:
+      name: very_good_analysis
+      sha256: "5e4ea72d2a9188630f0dd8f120a541de730090ef8863243fedca8267a84508b8"
+      url: "https://pub.dev"
+    source: hosted
+    version: "5.0.0+1"
+  vm_service:
+    dependency: transitive
+    description:
+      name: vm_service
+      sha256: e7fb6c2282f7631712b69c19d1bff82f3767eea33a2321c14fa59ad67ea391c7
+      url: "https://pub.dev"
+    source: hosted
+    version: "9.4.0"
+  watcher:
+    dependency: transitive
+    description:
+      name: watcher
+      sha256: "3d2ad6751b3c16cf07c7fca317a1413b3f26530319181b37e3b9039b84fc01d8"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.0"
+  web_socket_channel:
+    dependency: transitive
+    description:
+      name: web_socket_channel
+      sha256: ca49c0bc209c687b887f30527fb6a9d80040b072cc2990f34b9bec3e7663101b
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.3.0"
+  webkit_inspection_protocol:
+    dependency: transitive
+    description:
+      name: webkit_inspection_protocol
+      sha256: "67d3a8b6c79e1987d19d848b0892e582dbb0c66c57cc1fef58a177dd2aa2823d"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.2.0"
+  yaml:
+    dependency: transitive
+    description:
+      name: yaml
+      sha256: "23812a9b125b48d4007117254bca50abb6c712352927eece9e155207b1db2370"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.1.1"
+sdks:
+  dart: ">=3.0.1 <4.0.0"
diff --git a/packages/ew_keyring/pubspec.yaml b/packages/ew_keyring/pubspec.yaml
new file mode 100644
index 000000000..b64c894ea
--- /dev/null
+++ b/packages/ew_keyring/pubspec.yaml
@@ -0,0 +1,21 @@
+name: ew_keyring
+description: Encointer Utils Package
+version: 0.1.0+1
+publish_to: none
+
+environment:
+  sdk: ">=3.0.1 <4.0.0"
+
+dependencies:
+  convert: ^3.1.1
+  json_annotation: ^4.8.1
+  polkadart_keyring: 0.2.1
+  ss58: ^1.1.2
+  substrate_bip39: ^0.2.0
+
+dev_dependencies:
+  test: 1.24.3
+  very_good_analysis: ^5.0.0+1
+  build_runner: ^2.4.6
+  json_serializable: ^6.7.1
+
diff --git a/packages/ew_keyring/test/address_utils_test.dart b/packages/ew_keyring/test/address_utils_test.dart
new file mode 100644
index 000000000..856af493f
--- /dev/null
+++ b/packages/ew_keyring/test/address_utils_test.dart
@@ -0,0 +1,66 @@
+import 'package:ew_keyring/ew_keyring.dart' show Address, AddressUtils, AddressExtension;
+import 'package:test/test.dart';
+
+void main() {
+  group('AddressExtension', () {
+    test('toPubHex works', () {
+      final alice = Address.decode('5GrwvaEF5zXb26Fz9rcQpDWS57CtERHpNehXCPcNoHGKutQY');
+      expect(alice.toPubHex(), '0xd43593c715fdd31c61141abd04a99fd6822c8558854ccde39a5684e7a56da27d');
+    });
+  });
+
+  group('AddressUtils', () {
+    test('addressToPubKey with default prefix works works', () {
+      final alice = Address.decode('5GrwvaEF5zXb26Fz9rcQpDWS57CtERHpNehXCPcNoHGKutQY');
+      final pubAlice = AddressUtils.addressToPubKey('5GrwvaEF5zXb26Fz9rcQpDWS57CtERHpNehXCPcNoHGKutQY');
+
+      expect(alice.pubkey, pubAlice);
+      expect(alice.toPubHex(), '0xd43593c715fdd31c61141abd04a99fd6822c8558854ccde39a5684e7a56da27d');
+    });
+
+    test('addressToPubKey with prefix 2 works works', () {
+      final alice = Address.decode('HNZata7iMYWmk5RvZRTiAsSDhV8366zq2YGb3tLH5Upf74F');
+      final pubAlice = AddressUtils.addressToPubKey('HNZata7iMYWmk5RvZRTiAsSDhV8366zq2YGb3tLH5Upf74F');
+
+      expect(alice.pubkey, pubAlice);
+      expect(alice.toPubHex(), '0xd43593c715fdd31c61141abd04a99fd6822c8558854ccde39a5684e7a56da27d');
+    });
+
+    test('addressToPubKeyHex with default prefix works works', () {
+      final pubAlice = AddressUtils.addressToPubKeyHex('5GrwvaEF5zXb26Fz9rcQpDWS57CtERHpNehXCPcNoHGKutQY');
+      expect(pubAlice, '0xd43593c715fdd31c61141abd04a99fd6822c8558854ccde39a5684e7a56da27d');
+    });
+
+    test('addressToPubKeyHex with prefix 2 works works', () {
+      final pubAlice = AddressUtils.addressToPubKeyHex('HNZata7iMYWmk5RvZRTiAsSDhV8366zq2YGb3tLH5Upf74F');
+      expect(pubAlice, '0xd43593c715fdd31c61141abd04a99fd6822c8558854ccde39a5684e7a56da27d');
+    });
+
+    test('pubKeyToAddress with default prefix works', () {
+      final alice = Address.decode('5GrwvaEF5zXb26Fz9rcQpDWS57CtERHpNehXCPcNoHGKutQY');
+
+      final aliceAddress = AddressUtils.pubKeyToAddress(alice.pubkey);
+      expect(aliceAddress, '5GrwvaEF5zXb26Fz9rcQpDWS57CtERHpNehXCPcNoHGKutQY');
+    });
+
+    test('pubKeyToAddress with prefix 2 works', () {
+      final alice = Address.decode('HNZata7iMYWmk5RvZRTiAsSDhV8366zq2YGb3tLH5Upf74F');
+
+      final aliceAddress = AddressUtils.pubKeyToAddress(alice.pubkey, prefix: 2);
+      expect(aliceAddress, 'HNZata7iMYWmk5RvZRTiAsSDhV8366zq2YGb3tLH5Upf74F');
+    });
+
+    test('pubKeyHexToAddress with default prefix works', () {
+      final aliceAddress =
+          AddressUtils.pubKeyHexToAddress('0xd43593c715fdd31c61141abd04a99fd6822c8558854ccde39a5684e7a56da27d');
+      expect(aliceAddress, '5GrwvaEF5zXb26Fz9rcQpDWS57CtERHpNehXCPcNoHGKutQY');
+    });
+
+    test('pubKeyHexToAddress with prefix 2 works', () {
+      final aliceAddress = AddressUtils.pubKeyHexToAddress(
+          '0xd43593c715fdd31c61141abd04a99fd6822c8558854ccde39a5684e7a56da27d',
+          prefix: 2);
+      expect(aliceAddress, 'HNZata7iMYWmk5RvZRTiAsSDhV8366zq2YGb3tLH5Upf74F');
+    });
+  });
+}
diff --git a/packages/ew_keyring/test/keyring_data_test.dart b/packages/ew_keyring/test/keyring_data_test.dart
new file mode 100644
index 000000000..602f42ad0
--- /dev/null
+++ b/packages/ew_keyring/test/keyring_data_test.dart
@@ -0,0 +1,15 @@
+import 'package:ew_keyring/src/keyring_data.dart';
+import 'package:test/test.dart';
+
+void main() {
+  group('getSeedTypeFromString', () {
+    test('inferring key type works', () {
+      expect(getSeedTypeFromString('0xabe03'), SeedType.privateKey);
+      expect(getSeedTypeFromString('//Alice'), SeedType.raw);
+      expect(
+        getSeedTypeFromString('spray trust gown toast route merge awful sight ghost all degree exit'),
+        SeedType.mnemonic,
+      );
+    });
+  });
+}
diff --git a/packages/ew_keyring/test/keyring_test.dart b/packages/ew_keyring/test/keyring_test.dart
new file mode 100644
index 000000000..1b486fb15
--- /dev/null
+++ b/packages/ew_keyring/test/keyring_test.dart
@@ -0,0 +1,37 @@
+@Skip('These tests fail until we have sr25519 support')
+
+import 'package:ew_keyring/src/keyring.dart';
+import 'package:ew_keyring/src/keyring_data.dart';
+import 'package:polkadart_keyring/polkadart_keyring.dart';
+import 'package:test/test.dart';
+
+void main() {
+  group('Well known accounts', () {
+    test('inferring key type works', () async {
+      final alice = KeyringAccount('Alice', '//Alice');
+      final bob = KeyringAccount('Bob', '//Bob');
+      final charlie = KeyringAccount('Charlie', '//Charlie');
+      final accounts = [alice, bob, charlie];
+      final keyring = await EncointerKeyring.fromAccounts(accounts);
+
+      // print("keyring: ${keyring.accounts.toString()}");
+      // print("keyring: ${keyring.keyring.toString()}");
+
+      final alicePair = keyring.keyring.getByAddress('5GrwvaEF5zXb26Fz9rcQpDWS57CtERHpNehXCPcNoHGKutQY');
+      // final alicePair = keyring.getPairByPublicKey('d43593c715fdd31c61141abd04a99fd6822c8558854ccde39a5684e7a56da27d'.codeUnits);
+      final aliceAccount =
+          keyring.getAccountByPublicKey('d43593c715fdd31c61141abd04a99fd6822c8558854ccde39a5684e7a56da27d'.codeUnits);
+
+      expect(aliceAccount.name, 'Alice');
+      expect(alicePair.address, '5GrwvaEF5zXb26Fz9rcQpDWS57CtERHpNehXCPcNoHGKutQY');
+    });
+
+    test('test alice works', () async {
+      final pair = await KeyPair.fromMnemonic('//Alice');
+      expect(
+        pair.address,
+        '5GrwvaEF5zXb26Fz9rcQpDWS57CtERHpNehXCPcNoHGKutQY',
+      );
+    });
+  });
+}
diff --git a/app/test/utils/key_validation_test.dart b/packages/ew_keyring/test/validate_keys_test.dart
similarity index 95%
rename from app/test/utils/key_validation_test.dart
rename to packages/ew_keyring/test/validate_keys_test.dart
index ec6e25890..89af28355 100644
--- a/app/test/utils/key_validation_test.dart
+++ b/packages/ew_keyring/test/validate_keys_test.dart
@@ -1,6 +1,5 @@
-import 'package:flutter_test/flutter_test.dart';
-
-import 'package:encointer_wallet/utils/validate_keys.dart';
+import 'package:ew_keyring/ew_keyring.dart';
+import 'package:test/test.dart';
 
 void main() {
   group('PrivateKey', () {