Import account with a Nostr Private key

JoyboyCommunity/src/app/Router.tsx

@@ -7,6 +7,7 @@ import {StyleSheet, View} from 'react-native';
 import {Icon} from '../components';
 import {useStyles, useTheme} from '../hooks';
 import {CreateAccount} from '../screens/Auth/CreateAccount';
+import {ImportKeys} from '../screens/Auth/ImportKeys';
 import {Login} from '../screens/Auth/Login';
 import {SaveKeys} from '../screens/Auth/SaveKeys';
 import {CreatePost} from '../screens/CreatePost';
@@ -117,6 +118,7 @@ const AuthNavigator: React.FC = () => {
       {publicKey && <AuthStack.Screen name="Login" component={Login} />}
       <AuthStack.Screen name="CreateAccount" component={CreateAccount} />
       <AuthStack.Screen name="SaveKeys" component={SaveKeys} />
+      <AuthStack.Screen name="ImportKeys" component={ImportKeys} />
     </AuthStack.Navigator>
   );
 };

JoyboyCommunity/src/screens/Auth/CreateAccount.tsx

@@ -4,7 +4,7 @@ import {useState} from 'react';
 import {Platform} from 'react-native';
 
 import {LockIcon} from '../../assets/icons';
-import {Button, Input} from '../../components';
+import {Button, Input, TextButton} from '../../components';
 import {useNostrContext} from '../../context/NostrContext';
 import {useTheme} from '../../hooks';
 import {useDialog, useToast} from '../../hooks/modals';
@@ -70,6 +70,10 @@ export const CreateAccount: React.FC<AuthCreateAccountScreenProps> = ({navigatio
     navigation.navigate('SaveKeys', {privateKey, publicKey});
   };
 
+  const handleImportKey = () => {
+    navigation.navigate('ImportKeys');
+  };
+
   return (
     <Auth title="Create Account">
       <Input placeholder="@ Username" value={username} onChangeText={setUsername} />
@@ -90,6 +94,8 @@ export const CreateAccount: React.FC<AuthCreateAccountScreenProps> = ({navigatio
       >
         Create Account
       </Button>
+
+      <TextButton onPress={handleImportKey}>Import account</TextButton>
     </Auth>
   );
 };

JoyboyCommunity/src/screens/Auth/ImportKeys.tsx

@@ -0,0 +1,95 @@
+import {canUseBiometricAuthentication} from 'expo-secure-store';
+import {useState} from 'react';
+import {Platform} from 'react-native';
+
+import {LockIcon} from '../../assets/icons';
+import {Button, Input} from '../../components';
+import {useTheme} from '../../hooks';
+import {useDialog, useToast} from '../../hooks/modals';
+import {Auth} from '../../modules/Auth';
+import {AuthImportKeysScreenProps} from '../../types';
+import {getPublicKeyFromSecret, isValidNostrPrivateKey} from '../../utils/keypair';
+import {storePassword, storePrivateKey, storePublicKey} from '../../utils/storage';
+
+export const ImportKeys: React.FC<AuthImportKeysScreenProps> = ({navigation}) => {
+  const {theme} = useTheme();
+
+  const [password, setPassword] = useState('');
+  const [privateKey, setPrivateKey] = useState('');
+  const {showToast} = useToast();
+  const {showDialog, hideDialog} = useDialog();
+
+  const handleImportAccount = async () => {
+    if (!password) {
+      showToast({type: 'error', title: 'Password is required'});
+      return;
+    }
+
+    if (!privateKey) {
+      showToast({type: 'error', title: 'Private key to import is required'});
+      return;
+    }
+
+    if (!isValidNostrPrivateKey(privateKey)) {
+      showToast({type: 'error', title: 'Private key not valid'});
+      return;
+    }
+    await storePrivateKey(privateKey, password);
+    const publicKey = getPublicKeyFromSecret(privateKey);
+    await storePublicKey(publicKey);
+
+    const biometySupported = Platform.OS !== 'web' && canUseBiometricAuthentication();
+    if (biometySupported) {
+      showDialog({
+        title: 'Easy login',
+        description: 'Would you like to use biometrics to login?',
+        buttons: [
+          {
+            type: 'primary',
+            label: 'Yes',
+            onPress: async () => {
+              await storePassword(password);
+              hideDialog();
+            },
+          },
+          {
+            type: 'default',
+            label: 'No',
+            onPress: hideDialog,
+          },
+        ],
+      });
+    }
+
+    navigation.navigate('SaveKeys', {privateKey, publicKey});
+  };
+
+  return (
+    <Auth title="ImportKeys">
+      <Input
+        left={<LockIcon color={theme.colors.primary} />}
+        value={privateKey}
+        onChangeText={setPrivateKey}
+        secureTextEntry
+        placeholder="Private key"
+      />
+
+      <Input
+        left={<LockIcon color={theme.colors.primary} />}
+        value={password}
+        onChangeText={setPassword}
+        secureTextEntry
+        placeholder="Password"
+      />
+
+      <Button
+        block
+        variant="secondary"
+        disabled={!password || !privateKey}
+        onPress={handleImportAccount}
+      >
+        Import Account
+      </Button>
+    </Auth>
+  );
+};

JoyboyCommunity/src/screens/Auth/Login.tsx

@@ -79,6 +79,25 @@ export const Login: React.FC<AuthLoginScreenProps> = ({navigation}) => {
     });
   };
 
+  const handleImportAccount = () => {
+    showDialog({
+      title: 'WARNING',
+      description:
+        'Creating a new account will delete your current account. Are you sure you want to continue?',
+      buttons: [
+        {
+          type: 'primary',
+          label: 'Continue',
+          onPress: () => {
+            navigation.navigate('ImportKeys');
+            hideDialog();
+          },
+        },
+        {type: 'default', label: 'Cancel', onPress: hideDialog},
+      ],
+    });
+  };
+
   return (
     <Auth title="Login">
       <Input
@@ -92,8 +111,9 @@ export const Login: React.FC<AuthLoginScreenProps> = ({navigation}) => {
       <Button block variant="secondary" disabled={!password?.length} onPress={handleLogin}>
         Login
       </Button>
-
       <TextButton onPress={handleCreateAccount}>Create Account</TextButton>
+
+      <TextButton onPress={handleImportAccount}>Import Account</TextButton>
     </Auth>
   );
 };

JoyboyCommunity/src/types/routes.ts

@@ -14,6 +14,7 @@ export type AuthStackParams = {
     privateKey: string;
     publicKey: string;
   };
+  ImportKeys: undefined;
 };
 
 export type MainStackParams = {
@@ -49,6 +50,11 @@ export type AuthSaveKeysScreenProps = CompositeScreenProps<
   NativeStackScreenProps<RootStackParams>
 >;
 
+export type AuthImportKeysScreenProps = CompositeScreenProps<
+  NativeStackScreenProps<AuthStackParams, 'ImportKeys'>,
+  NativeStackScreenProps<RootStackParams>
+>;
+
 // Home Stack
 export type HomeNavigationProp = NativeStackNavigationProp<HomeBottomStackParams>;
 

JoyboyCommunity/src/utils/keypair.ts

@@ -28,3 +28,18 @@ export const getPublicKeyFromSecret = (privateKey: string) => {
     throw new Error('Failed to get public key from secret key');
   }
 };
+
+export const isValidNostrPrivateKey = (key: string): boolean => {
+  // Check if the string is exactly 64 characters long
+  if (key.length !== 64) {
+    return false;
+  }
+
+  // Check if the string contains only hexadecimal characters
+  const hexRegex = /^[0-9a-fA-F]+$/;
+  if (!hexRegex.test(key)) {
+    return false;
+  }
+
+  return true;
+};