.npmrc

@@ -0,0 +1 @@
+@cerc-io:registry=https://git.vdb.to/api/packages/cerc-io/npm/

README.md

@@ -25,7 +25,7 @@
 
 - Install Android SDK
 
-  - Open Android Studio -> Configure -> SDK Manager -> SDK PLatfrom Tab.
+  - Open Android Studio -> Configure -> SDK Manager -> SDK Platform Tab.
 
   - Check the box next to "Show Package Details" in the bottom right corner. Look for and expand the Android 13 (Tiramisu) entry, then make sure the following items are checked:
 
@@ -94,19 +94,26 @@
      WALLET_CONNECT_PROJECT_ID=39bc93c...
      ```
 
-5. Set up the Android device
+5. Add SDK directory to project
+   - Inside the [`android`](./android/) directory, create a file `local.properties` and add your Android SDK path
+     ```
+     sdk.dir = /home/USERNAME/Android/Sdk
+     ```
+     Where `USERNAME` is your linux username
+
+6. Set up the Android device
 
    - For a physical device, refer to the [React Native documentation for running on a physical device](https://reactnative.dev/docs/running-on-device)
 
    - For a virtual device, continue with the steps
 
-6. Start the application
+7. Start the application
 
    ```
    yarn start
    ```
 
-7. Press `a` to run the application on android
+8. Press `a` to run the application on android
 
 ## Flow for the app
 

babel.config.js

@@ -10,6 +10,9 @@ module.exports = {
           crypto: 'react-native-quick-crypto',
           stream: 'stream-browserify',
           buffer: '@craftzdog/react-native-buffer',
+          http: 'http-browserify',
+          https: 'https-browserify',
+          url: 'react-native-url-polyfill',
         },
       },
     ],

package.json

@@ -12,6 +12,7 @@
     "prepare": "husky"
   },
   "dependencies": {
+    "@cerc-io/registry-sdk": "^0.2.2",
     "@cosmjs/amino": "^0.32.3",
     "@cosmjs/crypto": "^0.32.3",
     "@cosmjs/proto-signing": "^0.32.3",
@@ -28,9 +29,12 @@
     "@walletconnect/react-native-compat": "^2.11.2",
     "@walletconnect/utils": "^2.12.2",
     "@walletconnect/web3wallet": "^1.10.2",
+    "assert": "^2.1.0",
     "chain-registry": "^1.41.2",
     "cosmjs-types": "^0.9.0",
     "ethers": "5.7.2",
+    "http-browserify": "^1.7.0",
+    "https-browserify": "^1.0.0",
     "lodash": "^4.17.21",
     "patch-package": "^8.0.0",
     "react": "18.2.0",
@@ -45,6 +49,7 @@
     "react-native-safe-area-context": "^4.9.0",
     "react-native-screens": "^3.29.0",
     "react-native-svg": "^15.1.0",
+    "react-native-url-polyfill": "^2.0.0",
     "react-native-vector-icons": "^10.0.3",
     "react-native-vision-camera": "^3.9.0",
     "text-encoding-polyfill": "^0.6.7",

src/App.tsx

@@ -22,16 +22,18 @@ import HomeScreen from './screens/HomeScreen';
 import SignRequest from './screens/SignRequest';
 import AddSession from './screens/AddSession';
 import WalletConnect from './screens/WalletConnect';
+import ApproveTransaction from './screens/ApproveTransaction';
 import { StackParamsList } from './types';
 import { web3wallet } from './utils/wallet-connect/WalletConnectUtils';
 import { EIP155_SIGNING_METHODS } from './utils/wallet-connect/EIP155Data';
 import { getSignParamsMessage } from './utils/wallet-connect/helpers';
-import ApproveTransaction from './screens/ApproveTransaction';
+import ApproveTransfer from './screens/ApproveTransfer';
 import AddNetwork from './screens/AddNetwork';
 import EditNetwork from './screens/EditNetwork';
 import { COSMOS, EIP155 } from './utils/constants';
 import { useNetworks } from './context/NetworksContext';
 import { NETWORK_METHODS } from './utils/wallet-connect/common-data';
+import { COSMOS_METHODS } from './utils/wallet-connect/COSMOSData';
 
 const Stack = createNativeStackNavigator<StackParamsList>();
 
@@ -114,7 +116,7 @@ const App = (): React.JSX.Element => {
           break;
 
         case EIP155_SIGNING_METHODS.ETH_SEND_TRANSACTION:
-          navigation.navigate('ApproveTransaction', {
+          navigation.navigate('ApproveTransfer', {
             transaction: request.params[0],
             requestEvent,
             requestSessionData,
@@ -131,7 +133,7 @@ const App = (): React.JSX.Element => {
           });
           break;
 
-        case 'cosmos_signDirect':
+        case COSMOS_METHODS.COSMOS_SIGN_DIRECT:
           const message = {
             txbody: TxBody.toJSON(
               TxBody.decode(
@@ -157,7 +159,7 @@ const App = (): React.JSX.Element => {
           });
           break;
 
-        case 'cosmos_signAmino':
+        case COSMOS_METHODS.COSMOS_SIGN_AMINO:
           navigation.navigate('SignRequest', {
             namespace: COSMOS,
             address: request.params.signerAddress,
@@ -167,14 +169,24 @@ const App = (): React.JSX.Element => {
           });
           break;
 
-        case 'cosmos_sendTokens':
-          navigation.navigate('ApproveTransaction', {
+        case COSMOS_METHODS.COSMOS_SEND_TOKENS:
+          navigation.navigate('ApproveTransfer', {
             transaction: request.params[0],
             requestEvent,
             requestSessionData,
           });
           break;
 
+        case COSMOS_METHODS.COSMOS_SEND_TRANSACTION:
+          const { transactionMessage, signer } = request.params;
+          navigation.navigate('ApproveTransaction', {
+            transactionMessage,
+            signer,
+            requestEvent,
+            requestSessionData,
+          });
+          break;
+
         default:
           throw new Error('Invalid method');
       }
@@ -268,10 +280,10 @@ const App = (): React.JSX.Element => {
         />
 
         <Stack.Screen
-          name="ApproveTransaction"
-          component={ApproveTransaction}
+          name="ApproveTransfer"
+          component={ApproveTransfer}
           options={{
-            title: 'Approve transaction',
+            title: 'Approve transfer',
           }}
         />
         <Stack.Screen
@@ -288,6 +300,13 @@ const App = (): React.JSX.Element => {
             title: 'Edit Network',
           }}
         />
+        <Stack.Screen
+          name="ApproveTransaction"
+          component={ApproveTransaction}
+          options={{
+            title: 'Approve Transaction',
+          }}
+        />
       </Stack.Navigator>
       <PairingModal
         visible={modalVisible}

src/components/Accounts.tsx

@@ -6,7 +6,7 @@ import { setInternetCredentials } from 'react-native-keychain';
 import { useNavigation } from '@react-navigation/native';
 import { NativeStackNavigationProp } from '@react-navigation/native-stack';
 
-import { AccountsProps, StackParamsList, Account } from '../types';
+import { StackParamsList, Account } from '../types';
 import { addAccount } from '../utils/accounts';
 import styles from '../styles/stylesheet';
 import HDPathDialog from './HDPathDialog';
@@ -16,12 +16,14 @@ import { web3wallet } from '../utils/wallet-connect/WalletConnectUtils';
 import { useNetworks } from '../context/NetworksContext';
 import ConfirmDialog from './ConfirmDialog';
 import { getNamespaces } from '../utils/wallet-connect/helpers';
+import ShowPKDialog from './ShowPKDialog';
 
-const Accounts = ({ currentIndex, updateIndex }: AccountsProps) => {
+const Accounts = () => {
   const navigation =
     useNavigation<NativeStackNavigationProp<StackParamsList>>();
 
-  const { accounts, setAccounts, setCurrentIndex } = useAccounts();
+  const { accounts, setAccounts, setCurrentIndex, currentIndex } =
+    useAccounts();
   const { networksData, selectedNetwork, setNetworksData, setSelectedNetwork } =
     useNetworks();
   const [expanded, setExpanded] = useState(false);
@@ -80,7 +82,7 @@ const Accounts = ({ currentIndex, updateIndex }: AccountsProps) => {
     setIsAccountCreating(false);
     if (newAccount) {
       updateAccounts(newAccount);
-      updateIndex(newAccount.index);
+      setCurrentIndex(newAccount.index);
     }
   };
 
@@ -90,7 +92,7 @@ const Accounts = ({ currentIndex, updateIndex }: AccountsProps) => {
         key={account.index}
         title={`Account ${account.index + 1}`}
         onPress={() => {
-          updateIndex(account.index);
+          setCurrentIndex(account.index);
           setExpanded(false);
         }}
       />
@@ -120,7 +122,6 @@ const Accounts = ({ currentIndex, updateIndex }: AccountsProps) => {
           visible={hdDialog}
           hideDialog={() => setHdDialog(false)}
           updateAccounts={updateAccounts}
-          updateIndex={updateIndex}
           pathCode={pathCode}
         />
         <List.Accordion
@@ -218,6 +219,8 @@ const Accounts = ({ currentIndex, updateIndex }: AccountsProps) => {
           hideDialog={hideDeleteNetworkDialog}
           onConfirm={handleRemove}
         />
+
+        <ShowPKDialog />
       </View>
     </ScrollView>
   );

src/components/HDPath.tsx

@@ -5,20 +5,20 @@ import { Button, TextInput } from 'react-native-paper';
 import { addAccountFromHDPath } from '../utils/accounts';
 import { Account, NetworksDataState, PathState } from '../types';
 import styles from '../styles/stylesheet';
+import { useAccounts } from '../context/AccountsContext';
 
 const HDPath = ({
   pathCode,
   updateAccounts,
-  updateIndex,
   hideDialog,
   selectedNetwork,
 }: {
   pathCode: string;
-  updateIndex: (index: number) => void;
   updateAccounts: (account: Account) => void;
   hideDialog: () => void;
   selectedNetwork: NetworksDataState;
 }) => {
+  const { setCurrentIndex } = useAccounts();
   const [isAccountCreating, setIsAccountCreating] = useState(false);
   const [path, setPath] = useState<PathState>({
     firstNumber: '',
@@ -46,7 +46,7 @@ const HDPath = ({
       const newAccount = await addAccountFromHDPath(hdPath, selectedNetwork);
       if (newAccount) {
         updateAccounts(newAccount);
-        updateIndex(newAccount.index);
+        setCurrentIndex(newAccount.index);
         hideDialog();
       }
     } catch (error) {

src/components/HDPathDialog.tsx

@@ -8,7 +8,6 @@ import { useNetworks } from '../context/NetworksContext';
 const HDPathDialog = ({
   visible,
   hideDialog,
-  updateIndex,
   updateAccounts,
   pathCode,
 }: HDPathDialogProps) => {
@@ -22,7 +21,6 @@ const HDPathDialog = ({
           <HDPath
             selectedNetwork={selectedNetwork!}
             pathCode={pathCode}
-            updateIndex={updateIndex}
             updateAccounts={updateAccounts}
             hideDialog={hideDialog}
           />

src/components/ShowPKDialog.tsx

@@ -0,0 +1,97 @@
+import { TouchableOpacity, View } from 'react-native';
+import React, { useState } from 'react';
+import { Button, Text, Portal, Dialog, useTheme } from 'react-native-paper';
+
+import styles from '../styles/stylesheet';
+import { getPathKey } from '../utils/misc';
+import { useNetworks } from '../context/NetworksContext';
+import { useAccounts } from '../context/AccountsContext';
+
+const ShowPKDialog = () => {
+  const { currentIndex } = useAccounts();
+  const { selectedNetwork } = useNetworks();
+
+  const [privateKey, setprivateKey] = useState<string>();
+  const [showPKDialog, setShowPKDialog] = useState<boolean>(false);
+
+  const theme = useTheme();
+
+  const handleShowPrivateKey = async () => {
+    const pathKey = await getPathKey(
+      `${selectedNetwork!.namespace}:${selectedNetwork!.chainId}`,
+      currentIndex,
+    );
+
+    setprivateKey(pathKey.privKey);
+  };
+
+  const hideShowPKDialog = () => {
+    setShowPKDialog(false);
+    setprivateKey(undefined);
+  };
+
+  return (
+    <>
+      <View style={styles.signLink}>
+        <TouchableOpacity
+          onPress={() => {
+            setShowPKDialog(true);
+          }}>
+          <Text
+            variant="titleSmall"
+            style={[styles.hyperlink, { color: theme.colors.primary }]}>
+            Show Private Key
+          </Text>
+        </TouchableOpacity>
+      </View>
+      <View>
+        <Portal>
+          <Dialog visible={showPKDialog} onDismiss={hideShowPKDialog}>
+            <Dialog.Title>
+              {!privateKey ? (
+                <Text>Show Private Key?</Text>
+              ) : (
+                <Text>Private Key</Text>
+              )}
+            </Dialog.Title>
+            <Dialog.Content>
+              {privateKey && (
+                <View style={[styles.dataBox, styles.dataBoxContainer]}>
+                  <Text
+                    selectable
+                    variant="bodyMedium"
+                    style={styles.dataBoxData}>
+                    {privateKey}
+                  </Text>
+                </View>
+              )}
+              <View>
+                <Text variant="bodyMedium" style={styles.dialogWarning}>
+                  <Text style={[styles.highlight, styles.dialogWarning]}>
+                    Warning:
+                  </Text>
+                  Never disclose this key. Anyone with your private keys can
+                  steal any assets held in your account.
+                </Text>
+              </View>
+            </Dialog.Content>
+            <Dialog.Actions>
+              {!privateKey ? (
+                <>
+                  <Button onPress={handleShowPrivateKey} textColor="red">
+                    Yes
+                  </Button>
+                  <Button onPress={hideShowPKDialog}>No</Button>
+                </>
+              ) : (
+                <Button onPress={hideShowPKDialog}>Ok</Button>
+              )}
+            </Dialog.Actions>
+          </Dialog>
+        </Portal>
+      </View>
+    </>
+  );
+};
+
+export default ShowPKDialog;

src/screens/ApproveTransaction.tsx

@@ -1,103 +1,65 @@
-import React, { useCallback, useEffect, useMemo, useState } from 'react';
+import React, { useCallback, useEffect, useState } from 'react';
 import { Image, ScrollView, View } from 'react-native';
-import {
-  ActivityIndicator,
-  Button,
-  Text,
-  Appbar,
-  TextInput,
-} from 'react-native-paper';
-import { providers, BigNumber } from 'ethers';
+import { Button, Text, TextInput } from 'react-native-paper';
+import { SvgUri } from 'react-native-svg';
 import Config from 'react-native-config';
-import { Deferrable } from 'ethers/lib/utils';
 
-import { useNavigation } from '@react-navigation/native';
 import {
   NativeStackNavigationProp,
   NativeStackScreenProps,
 } from '@react-navigation/native-stack';
-import { getHeaderTitle } from '@react-navigation/elements';
+import { useNavigation } from '@react-navigation/native';
 import { DirectSecp256k1Wallet } from '@cosmjs/proto-signing';
-import {
-  calculateFee,
-  GasPrice,
-  MsgSendEncodeObject,
-  SigningStargateClient,
-} from '@cosmjs/stargate';
+import { LaconicClient } from '@cerc-io/registry-sdk';
+import { GasPrice, calculateFee } from '@cosmjs/stargate';
+import { formatJsonRpcError } from '@json-rpc-tools/utils';
 
+import { useNetworks } from '../context/NetworksContext';
 import { Account, StackParamsList } from '../types';
-import AccountDetails from '../components/AccountDetails';
 import styles from '../styles/stylesheet';
+import { COSMOS, IS_NUMBER_REGEX } from '../utils/constants';
 import { retrieveSingleAccount } from '../utils/accounts';
+import { getPathKey } from '../utils/misc';
 import {
+  WalletConnectRequests,
   approveWalletConnectRequest,
   rejectWalletConnectRequest,
-  WalletConnectRequests,
 } from '../utils/wallet-connect/wallet-connect-requests';
 import { web3wallet } from '../utils/wallet-connect/WalletConnectUtils';
-import DataBox from '../components/DataBox';
-import { getPathKey } from '../utils/misc';
-import { useNetworks } from '../context/NetworksContext';
-import { COSMOS, EIP155, IS_NUMBER_REGEX } from '../utils/constants';
+import { MEMO } from './ApproveTransfer';
 import TxErrorDialog from '../components/TxErrorDialog';
-import { EIP155_SIGNING_METHODS } from '../utils/wallet-connect/EIP155Data';
-import { COSMOS_METHODS } from '../utils/wallet-connect/COSMOSData';
+import AccountDetails from '../components/AccountDetails';
 
-const MEMO = 'Sending signed tx from Laconic Wallet';
-// Reference: https://ethereum.org/en/developers/docs/gas/#what-is-gas-limit
-const ETH_MINIMUM_GAS = 21000;
-
-type SignRequestProps = NativeStackScreenProps<
+type ApproveTransactionProps = NativeStackScreenProps<
   StackParamsList,
   'ApproveTransaction'
 >;
 
-const ApproveTransaction = ({ route }: SignRequestProps) => {
+const ApproveTransaction = ({ route }: ApproveTransactionProps) => {
   const { networksData } = useNetworks();
 
   const requestSession = route.params.requestSessionData;
   const requestName = requestSession.peer.metadata.name;
   const requestIcon = requestSession.peer.metadata.icons[0];
   const requestURL = requestSession.peer.metadata.url;
-  const transaction = route.params.transaction;
+  const transactionMessage = route.params.transactionMessage;
+  const signer = route.params.signer;
   const requestEvent = route.params.requestEvent;
   const chainId = requestEvent.params.chainId;
-  const requestMethod = requestEvent.params.request.method;
+  const requestEventId = requestEvent.id;
+  const topic = requestEvent.topic;
 
   const [account, setAccount] = useState<Account>();
-  const [isLoading, setIsLoading] = useState(true);
-  const [balance, setBalance] = useState<string>('');
-  const [isTxLoading, setIsTxLoading] = useState(false);
   const [cosmosStargateClient, setCosmosStargateClient] =
-    useState<SigningStargateClient>();
-  const [fees, setFees] = useState<string>();
+    useState<LaconicClient>();
   const [cosmosGasLimit, setCosmosGasLimit] = useState<string>();
+  const [fees, setFees] = useState<string>();
   const [txError, setTxError] = useState<string>();
   const [isTxErrorDialogOpen, setIsTxErrorDialogOpen] = useState(false);
-  const [ethGasPrice, setEthGasPrice] = useState<BigNumber | null>();
-  const [ethGasLimit, setEthGasLimit] = useState<BigNumber>();
-  const [ethMaxFee, setEthMaxFee] = useState<BigNumber | null>();
-  const [ethMaxPriorityFee, setEthMaxPriorityFee] =
-    useState<BigNumber | null>();
+  const [isRequestAccepted, setIsRequestAccepted] = useState(false);
 
-  const isSufficientFunds = useMemo(() => {
-    if (!transaction.value) {
-      return;
-    }
-
-    if (!balance) {
-      return;
-    }
-
-    const amountBigNum = BigNumber.from(String(transaction.value));
-    const balanceBigNum = BigNumber.from(balance);
-
-    if (amountBigNum.gte(balanceBigNum)) {
-      return false;
-    } else {
-      return true;
-    }
-  }, [balance, transaction]);
+  const navigation =
+    useNavigation<NativeStackNavigationProp<StackParamsList>>();
 
   const requestedNetwork = networksData.find(
     networkData =>
@@ -105,22 +67,6 @@ const ApproveTransaction = ({ route }: SignRequestProps) => {
   );
   const namespace = requestedNetwork!.namespace;
 
-  const sendMsg: MsgSendEncodeObject = useMemo(() => {
-    return {
-      typeUrl: '/cosmos.bank.v1beta1.MsgSend',
-      value: {
-        fromAddress: transaction.from,
-        toAddress: transaction.to,
-        amount: [
-          {
-            amount: String(transaction.value),
-            denom: requestedNetwork!.nativeDenom!,
-          },
-        ],
-      },
-    };
-  }, [requestedNetwork, transaction]);
-
   useEffect(() => {
     if (namespace !== COSMOS) {
       return;
@@ -144,41 +90,21 @@ const ApproveTransaction = ({ route }: SignRequestProps) => {
       );
 
       try {
-        const client = await SigningStargateClient.connectWithSigner(
+        const client = await LaconicClient.connectWithSigner(
           requestedNetwork?.rpcUrl!,
           sender,
         );
-
         setCosmosStargateClient(client);
       } catch (error: any) {
         setTxError(error.message);
         setIsTxErrorDialogOpen(true);
+        const response = formatJsonRpcError(requestEventId, error.message);
+        await web3wallet!.respondSessionRequest({ topic, response });
       }
     };
 
     setClient();
-  }, [account, requestedNetwork, chainId, namespace]);
-
-  const provider = useMemo(() => {
-    if (namespace === EIP155) {
-      if (!requestedNetwork) {
-        throw new Error('Requested chain not supported');
-      }
-      try {
-        const ethProvider = new providers.JsonRpcProvider(
-          requestedNetwork.rpcUrl,
-        );
-
-        return ethProvider;
-      } catch (error: any) {
-        setTxError(error.message);
-        setIsTxErrorDialogOpen(true);
-      }
-    }
-  }, [requestedNetwork, namespace]);
-
-  const navigation =
-    useNavigation<NativeStackNavigationProp<StackParamsList>>();
+  }, [account, requestedNetwork, chainId, namespace, requestEventId, topic]);
 
   const retrieveData = useCallback(
     async (requestAddress: string) => {
@@ -198,245 +124,8 @@ const ApproveTransaction = ({ route }: SignRequestProps) => {
   );
 
   useEffect(() => {
-    // Set loading to false when gas values for requested chain are fetched
-    // If requested chain is EVM compatible, the cosmos gas values will be undefined and vice-versa, hence the condition checks only one of them at the same time
-    if (
-      // If requested chain is EVM compatible, set loading to false when ethMaxFee and ethPriorityFee have been populated
-      (ethMaxFee !== undefined && ethMaxPriorityFee !== undefined) ||
-      // Or if requested chain is a cosmos chain, set loading to false when cosmosGasLimit has been populated
-      cosmosGasLimit !== undefined
-    ) {
-      setIsLoading(false);
-    }
-  }, [ethMaxFee, ethMaxPriorityFee, cosmosGasLimit]);
-
-  useEffect(() => {
-    if (namespace === EIP155) {
-      const ethFees = BigNumber.from(ethGasLimit ?? 0)
-        .mul(BigNumber.from(ethMaxFee ?? ethGasPrice ?? 0))
-        .toString();
-      setFees(ethFees);
-    } else {
-      const gasPrice = GasPrice.fromString(
-        requestedNetwork?.gasPrice! + requestedNetwork?.nativeDenom,
-      );
-
-      if (!cosmosGasLimit) {
-        return;
-      }
-
-      const cosmosFees = calculateFee(Number(cosmosGasLimit), gasPrice);
-
-      setFees(cosmosFees.amount[0].amount);
-    }
-  }, [
-    transaction,
-    namespace,
-    ethGasLimit,
-    ethGasPrice,
-    cosmosGasLimit,
-    requestedNetwork,
-    ethMaxFee,
-  ]);
-  useEffect(() => {
-    retrieveData(transaction.from!);
-  }, [retrieveData, transaction]);
-
-  const isEIP1559 = useMemo(() => {
-    if (cosmosGasLimit) {
-      return;
-    }
-    if (ethMaxFee !== null && ethMaxPriorityFee !== null) {
-      return true;
-    }
-    return false;
-  }, [cosmosGasLimit, ethMaxFee, ethMaxPriorityFee]);
-
-  const acceptRequestHandler = async () => {
-    setIsTxLoading(true);
-    try {
-      if (!account) {
-        throw new Error('account not found');
-      }
-
-      if (ethGasLimit && ethGasLimit.lt(ETH_MINIMUM_GAS)) {
-        throw new Error(`Atleast ${ETH_MINIMUM_GAS} gas limit is required`);
-      }
-
-      if (ethMaxFee && ethMaxPriorityFee && ethMaxFee.lte(ethMaxPriorityFee)) {
-        throw new Error(
-          `Max fee per gas (${ethMaxFee.toNumber()}) cannot be lower than or equal to max priority fee per gas (${ethMaxPriorityFee.toNumber()})`,
-        );
-      }
-
-      let options: WalletConnectRequests;
-
-      switch (requestMethod) {
-        case EIP155_SIGNING_METHODS.ETH_SEND_TRANSACTION:
-          if (
-            ethMaxFee === undefined ||
-            ethMaxPriorityFee === undefined ||
-            ethGasPrice === undefined
-          ) {
-            throw new Error('Gas values not found');
-          }
-
-          options = {
-            type: 'eth_sendTransaction',
-            provider: provider!,
-            ethGasLimit: BigNumber.from(ethGasLimit),
-            ethGasPrice: ethGasPrice ? ethGasPrice.toHexString() : null,
-            maxFeePerGas: ethMaxFee,
-            maxPriorityFeePerGas: ethMaxPriorityFee,
-          };
-          break;
-        case COSMOS_METHODS.COSMOS_SEND_TOKENS:
-          if (!cosmosStargateClient) {
-            throw new Error('Cosmos stargate client not found');
-          }
-
-          options = {
-            type: 'cosmos_sendTokens',
-            signingStargateClient: cosmosStargateClient,
-            // StdFee object
-            cosmosFee: {
-              // This amount is total fees required for transaction
-              amount: [
-                {
-                  amount: fees!,
-                  denom: requestedNetwork!.nativeDenom!,
-                },
-              ],
-              gas: cosmosGasLimit!,
-            },
-            sendMsg,
-            memo: MEMO,
-          };
-
-          break;
-        default:
-          throw new Error('Invalid method');
-      }
-
-      const response = await approveWalletConnectRequest(
-        requestEvent,
-        account,
-        namespace,
-        requestedNetwork!.chainId,
-        options,
-      );
-
-      const { topic } = requestEvent;
-      await web3wallet!.respondSessionRequest({ topic, response });
-      navigation.navigate('Laconic');
-    } catch (error: any) {
-      setTxError(error.message);
-      setIsTxErrorDialogOpen(true);
-    }
-    setIsTxLoading(false);
-  };
-
-  const rejectRequestHandler = async () => {
-    const response = rejectWalletConnectRequest(requestEvent);
-    const { topic } = requestEvent;
-    await web3wallet!.respondSessionRequest({
-      topic,
-      response,
-    });
-
-    navigation.navigate('Laconic');
-  };
-
-  useEffect(() => {
-    const getAccountBalance = async () => {
-      try {
-        if (!account) {
-          return;
-        }
-        if (namespace === EIP155) {
-          if (!provider) {
-            return;
-          }
-          const fetchedBalance = await provider.getBalance(account.address);
-          setBalance(fetchedBalance ? fetchedBalance.toString() : '0');
-        } else {
-          const cosmosBalance = await cosmosStargateClient?.getBalance(
-            account.address,
-            requestedNetwork!.nativeDenom!.toLowerCase(),
-          );
-
-          setBalance(cosmosBalance?.amount!);
-        }
-      } catch (error: any) {
-        setTxError(error.message);
-        setIsTxErrorDialogOpen(true);
-      }
-    };
-
-    getAccountBalance();
-  }, [account, provider, namespace, cosmosStargateClient, requestedNetwork]);
-
-  useEffect(() => {
-    navigation.setOptions({
-      // eslint-disable-next-line react/no-unstable-nested-components
-      header: ({ options, back }) => {
-        const title = getHeaderTitle(options, 'Approve Transaction');
-
-        return (
-          <Appbar.Header>
-            {back && (
-              <Appbar.BackAction
-                onPress={async () => {
-                  await rejectRequestHandler();
-                  navigation.navigate('Laconic');
-                }}
-              />
-            )}
-            <Appbar.Content title={title} />
-          </Appbar.Header>
-        );
-      },
-    });
-    // eslint-disable-next-line react-hooks/exhaustive-deps
-  }, [navigation, route.name]);
-
-  useEffect(() => {
-    const getEthGas = async () => {
-      try {
-        if (!isSufficientFunds || !provider) {
-          return;
-        }
-
-        const data = await provider.getFeeData();
-
-        setEthMaxFee(data.maxFeePerGas);
-        setEthMaxPriorityFee(data.maxPriorityFeePerGas);
-        setEthGasPrice(data.gasPrice);
-
-        if (transaction.gasLimit) {
-          setEthGasLimit(BigNumber.from(transaction.gasLimit));
-        } else {
-          const transactionObject: Deferrable<providers.TransactionRequest> = {
-            from: transaction.from!,
-            to: transaction.to!,
-            data: transaction.data!,
-            value: transaction.value!,
-            maxFeePerGas: data.maxFeePerGas ?? undefined,
-            maxPriorityFeePerGas: data.maxPriorityFeePerGas ?? undefined,
-            gasPrice: data.maxFeePerGas
-              ? undefined
-              : data.gasPrice ?? undefined,
-          };
-          const gasLimit = await provider.estimateGas(transactionObject);
-          setEthGasLimit(gasLimit);
-        }
-      } catch (error: any) {
-        setTxError(error.message);
-        setIsTxErrorDialogOpen(true);
-      }
-    };
-    getEthGas();
-  }, [provider, transaction, isSufficientFunds]);
+    retrieveData(signer);
+  }, [retrieveData, signer]);
 
   useEffect(() => {
     const getCosmosGas = async () => {
@@ -444,13 +133,9 @@ const ApproveTransaction = ({ route }: SignRequestProps) => {
         if (!cosmosStargateClient) {
           return;
         }
-        if (!isSufficientFunds) {
-          return;
-        }
-
-        const gasEstimation = await cosmosStargateClient.simulate(
-          transaction.from!,
-          [sendMsg],
+        const gasEstimation = await cosmosStargateClient!.simulate(
+          transactionMessage.value.participant!,
+          [transactionMessage],
           MEMO,
         );
 
@@ -462,163 +147,134 @@ const ApproveTransaction = ({ route }: SignRequestProps) => {
       } catch (error: any) {
         setTxError(error.message);
         setIsTxErrorDialogOpen(true);
+        const response = formatJsonRpcError(requestEventId, error.message);
+        await web3wallet!.respondSessionRequest({ topic, response });
       }
     };
     getCosmosGas();
-  }, [cosmosStargateClient, isSufficientFunds, sendMsg, transaction]);
+  }, [cosmosStargateClient, transactionMessage, requestEventId, topic]);
 
   useEffect(() => {
-    if (balance && !isSufficientFunds) {
-      setTxError('Insufficient funds');
-      setIsTxErrorDialogOpen(true);
+    const gasPrice = GasPrice.fromString(
+      requestedNetwork?.gasPrice! + requestedNetwork?.nativeDenom,
+    );
+
+    if (!cosmosGasLimit) {
+      return;
     }
-  }, [isSufficientFunds, balance]);
+
+    const cosmosFees = calculateFee(Number(cosmosGasLimit), gasPrice);
+
+    setFees(cosmosFees.amount[0].amount);
+  }, [namespace, cosmosGasLimit, requestedNetwork]);
+
+  const acceptRequestHandler = async () => {
+    try {
+      setIsRequestAccepted(true);
+      if (!account) {
+        throw new Error('account not found');
+      }
+
+      let options: WalletConnectRequests;
+
+      if (!cosmosStargateClient) {
+        throw new Error('Cosmos stargate client not found');
+      }
+
+      options = {
+        type: 'cosmos_sendTransaction',
+        LaconicClient: cosmosStargateClient,
+        // StdFee object
+        cosmosFee: {
+          // This amount is total fees required for transaction
+          amount: [
+            {
+              amount: fees!,
+              denom: requestedNetwork!.nativeDenom!,
+            },
+          ],
+          gas: cosmosGasLimit!,
+        },
+        txMsg: transactionMessage,
+      };
+
+      const response = await approveWalletConnectRequest(
+        requestEvent,
+        account,
+        namespace,
+        requestedNetwork!.chainId,
+        options,
+      );
+
+      await web3wallet!.respondSessionRequest({ topic, response });
+      setIsRequestAccepted(false);
+      navigation.navigate('Laconic');
+    } catch (error: any) {
+      setTxError(error.message);
+      setIsTxErrorDialogOpen(true);
+      const response = formatJsonRpcError(requestEventId, error.message);
+      await web3wallet!.respondSessionRequest({ topic, response });
+    }
+  };
+
+  const rejectRequestHandler = async () => {
+    const response = rejectWalletConnectRequest(requestEvent);
+    await web3wallet!.respondSessionRequest({
+      topic,
+      response,
+    });
+
+    navigation.navigate('Laconic');
+  };
 
   return (
     <>
-      {isLoading ? (
-        <View style={styles.spinnerContainer}>
-          <ActivityIndicator size="large" color="#0000ff" />
-        </View>
-      ) : (
-        <>
-          <ScrollView contentContainerStyle={styles.appContainer}>
-            <View style={styles.dappDetails}>
-              {requestIcon && (
-                <Image
-                  style={styles.dappLogo}
-                  source={requestIcon ? { uri: requestIcon } : undefined}
-                />
+      <ScrollView contentContainerStyle={styles.approveTransaction}>
+        <View style={styles.dappDetails}>
+          {requestIcon && (
+            <>
+              {requestIcon.endsWith('.svg') ? (
+                <View style={styles.dappLogo}>
+                  <SvgUri height="50" width="50" uri={requestIcon} />
+                </View>
+              ) : (
+                <Image style={styles.dappLogo} source={{ uri: requestIcon }} />
               )}
-              <Text>{requestName}</Text>
-              <Text variant="bodyMedium">{requestURL}</Text>
-            </View>
-            <View style={styles.dataBoxContainer}>
-              <Text style={styles.dataBoxLabel}>From</Text>
-              <View style={styles.dataBox}>
-                <AccountDetails account={account} />
-              </View>
-            </View>
-            <DataBox
-              label={`Balance (${
-                namespace === EIP155 ? 'wei' : requestedNetwork!.nativeDenom
-              })`}
-              data={
-                balance === '' || balance === undefined
-                  ? 'Loading balance...'
-                  : `${balance}`
+            </>
+          )}
+          <Text>{requestName}</Text>
+          <Text variant="bodySmall">{requestURL}</Text>
+        </View>
+        <AccountDetails account={account} />
+        <Text variant="bodyLarge" style={styles.transactionLabel}>
+          Message:
+        </Text>
+        <View style={styles.messageBody}>
+          <Text variant="bodyLarge">
+            {JSON.stringify(transactionMessage, null, 2)}
+          </Text>
+        </View>
+        <>
+          <Text variant="bodyLarge" style={styles.transactionLabel}>
+            Gas Limit:
+          </Text>
+          <TextInput
+            mode="outlined"
+            style={styles.transactionFeesInput}
+            value={cosmosGasLimit}
+            onChangeText={value => {
+              if (IS_NUMBER_REGEX.test(value)) {
+                setCosmosGasLimit(value);
               }
-            />
-            {transaction && (
-              <View style={styles.approveTransaction}>
-                <DataBox label="To" data={transaction.to!} />
-                <DataBox
-                  label={`Amount (${
-                    namespace === EIP155 ? 'wei' : requestedNetwork!.nativeDenom
-                  })`}
-                  data={BigNumber.from(
-                    transaction.value?.toString(),
-                  ).toString()}
-                />
-
-                {namespace === EIP155 ? (
-                  <>
-                    {isEIP1559 === false ? (
-                      <>
-                        <Text style={styles.dataBoxLabel}>
-                          {'Gas Price (wei)'}
-                        </Text>
-                        <TextInput
-                          mode="outlined"
-                          value={ethGasPrice?.toNumber().toString()}
-                          onChangeText={value =>
-                            setEthGasPrice(BigNumber.from(value))
-                          }
-                          style={styles.transactionFeesInput}
-                        />
-                      </>
-                    ) : (
-                      <>
-                        <Text style={styles.dataBoxLabel}>
-                          Max Fee Per Gas (wei)
-                        </Text>
-                        <TextInput
-                          mode="outlined"
-                          value={ethMaxFee?.toNumber().toString()}
-                          onChangeText={value => {
-                            if (IS_NUMBER_REGEX.test(value)) {
-                              setEthMaxFee(BigNumber.from(value));
-                            }
-                          }}
-                          style={styles.transactionFeesInput}
-                        />
-                        <Text style={styles.dataBoxLabel}>
-                          Max Priority Fee Per Gas (wei)
-                        </Text>
-                        <TextInput
-                          mode="outlined"
-                          value={ethMaxPriorityFee?.toNumber().toString()}
-                          onChangeText={value => {
-                            if (IS_NUMBER_REGEX.test(value)) {
-                              setEthMaxPriorityFee(BigNumber.from(value));
-                            }
-                          }}
-                          style={styles.transactionFeesInput}
-                        />
-                      </>
-                    )}
-                    <Text style={styles.dataBoxLabel}>Gas Limit</Text>
-                    <TextInput
-                      mode="outlined"
-                      value={ethGasLimit?.toNumber().toString()}
-                      onChangeText={value => {
-                        if (IS_NUMBER_REGEX.test(value)) {
-                          setEthGasLimit(BigNumber.from(value));
-                        }
-                      }}
-                      style={styles.transactionFeesInput}
-                    />
-                    <DataBox
-                      label={`${
-                        isEIP1559 === true ? 'Max Fee' : 'Gas Fee'
-                      } (wei)`}
-                      data={fees!}
-                    />
-                    <DataBox label="Data" data={transaction.data!} />
-                  </>
-                ) : (
-                  <>
-                    <Text style={styles.dataBoxLabel}>{`Fee (${
-                      requestedNetwork!.nativeDenom
-                    })`}</Text>
-                    <TextInput
-                      mode="outlined"
-                      value={fees}
-                      onChangeText={value => setFees(value)}
-                      style={styles.transactionFeesInput}
-                    />
-                    <Text style={styles.dataBoxLabel}>Gas Limit</Text>
-                    <TextInput
-                      mode="outlined"
-                      value={cosmosGasLimit}
-                      onChangeText={value => {
-                        if (IS_NUMBER_REGEX.test(value)) {
-                          setCosmosGasLimit(value);
-                        }
-                      }}
-                    />
-                  </>
-                )}
-              </View>
-            )}
-          </ScrollView>
+            }}
+          />
           <View style={styles.buttonContainer}>
             <Button
               mode="contained"
               onPress={acceptRequestHandler}
-              loading={isTxLoading}
-              disabled={!balance || !fees}>
-              {isTxLoading ? 'Processing' : 'Yes'}
+              loading={isRequestAccepted}
+              disabled={isRequestAccepted}>
+              Yes
             </Button>
             <Button
               mode="contained"
@@ -628,16 +284,13 @@ const ApproveTransaction = ({ route }: SignRequestProps) => {
             </Button>
           </View>
         </>
-      )}
+      </ScrollView>
       <TxErrorDialog
         error={txError!}
         visible={isTxErrorDialogOpen}
-        hideDialog={() => {
+        hideDialog={async () => {
           setIsTxErrorDialogOpen(false);
-          if (!isSufficientFunds || !balance || !fees) {
-            rejectRequestHandler();
-            navigation.navigate('Laconic');
-          }
+          navigation.navigate('Laconic');
         }}
       />
     </>

src/screens/ApproveTransfer.tsx

@@ -0,0 +1,648 @@
+import React, { useCallback, useEffect, useMemo, useState } from 'react';
+import { Image, ScrollView, View } from 'react-native';
+import {
+  ActivityIndicator,
+  Button,
+  Text,
+  Appbar,
+  TextInput,
+} from 'react-native-paper';
+import { providers, BigNumber } from 'ethers';
+import Config from 'react-native-config';
+import { Deferrable } from 'ethers/lib/utils';
+
+import { useNavigation } from '@react-navigation/native';
+import {
+  NativeStackNavigationProp,
+  NativeStackScreenProps,
+} from '@react-navigation/native-stack';
+import { getHeaderTitle } from '@react-navigation/elements';
+import { DirectSecp256k1Wallet } from '@cosmjs/proto-signing';
+import {
+  calculateFee,
+  GasPrice,
+  MsgSendEncodeObject,
+  SigningStargateClient,
+} from '@cosmjs/stargate';
+
+import { Account, StackParamsList } from '../types';
+import AccountDetails from '../components/AccountDetails';
+import styles from '../styles/stylesheet';
+import { retrieveSingleAccount } from '../utils/accounts';
+import {
+  approveWalletConnectRequest,
+  rejectWalletConnectRequest,
+  WalletConnectRequests,
+} from '../utils/wallet-connect/wallet-connect-requests';
+import { web3wallet } from '../utils/wallet-connect/WalletConnectUtils';
+import DataBox from '../components/DataBox';
+import { getPathKey } from '../utils/misc';
+import { useNetworks } from '../context/NetworksContext';
+import { COSMOS, EIP155, IS_NUMBER_REGEX } from '../utils/constants';
+import TxErrorDialog from '../components/TxErrorDialog';
+import { EIP155_SIGNING_METHODS } from '../utils/wallet-connect/EIP155Data';
+import { COSMOS_METHODS } from '../utils/wallet-connect/COSMOSData';
+
+export const MEMO = 'Sending signed tx from Laconic Wallet';
+// Reference: https://ethereum.org/en/developers/docs/gas/#what-is-gas-limit
+const ETH_MINIMUM_GAS = 21000;
+
+type SignRequestProps = NativeStackScreenProps<
+  StackParamsList,
+  'ApproveTransfer'
+>;
+
+const ApproveTransfer = ({ route }: SignRequestProps) => {
+  const { networksData } = useNetworks();
+
+  const requestSession = route.params.requestSessionData;
+  const requestName = requestSession.peer.metadata.name;
+  const requestIcon = requestSession.peer.metadata.icons[0];
+  const requestURL = requestSession.peer.metadata.url;
+  const transaction = route.params.transaction;
+  const requestEvent = route.params.requestEvent;
+  const chainId = requestEvent.params.chainId;
+  const requestMethod = requestEvent.params.request.method;
+
+  const [account, setAccount] = useState<Account>();
+  const [isLoading, setIsLoading] = useState(true);
+  const [balance, setBalance] = useState<string>('');
+  const [isTxLoading, setIsTxLoading] = useState(false);
+  const [cosmosStargateClient, setCosmosStargateClient] =
+    useState<SigningStargateClient>();
+  const [fees, setFees] = useState<string>();
+  const [cosmosGasLimit, setCosmosGasLimit] = useState<string>();
+  const [txError, setTxError] = useState<string>();
+  const [isTxErrorDialogOpen, setIsTxErrorDialogOpen] = useState(false);
+  const [ethGasPrice, setEthGasPrice] = useState<BigNumber | null>();
+  const [ethGasLimit, setEthGasLimit] = useState<BigNumber>();
+  const [ethMaxFee, setEthMaxFee] = useState<BigNumber | null>();
+  const [ethMaxPriorityFee, setEthMaxPriorityFee] =
+    useState<BigNumber | null>();
+
+  const isSufficientFunds = useMemo(() => {
+    if (!transaction.value) {
+      return;
+    }
+
+    if (!balance) {
+      return;
+    }
+
+    const amountBigNum = BigNumber.from(String(transaction.value));
+    const balanceBigNum = BigNumber.from(balance);
+
+    if (amountBigNum.gte(balanceBigNum)) {
+      return false;
+    } else {
+      return true;
+    }
+  }, [balance, transaction]);
+
+  const requestedNetwork = networksData.find(
+    networkData =>
+      `${networkData.namespace}:${networkData.chainId}` === chainId,
+  );
+  const namespace = requestedNetwork!.namespace;
+
+  const sendMsg: MsgSendEncodeObject = useMemo(() => {
+    return {
+      typeUrl: '/cosmos.bank.v1beta1.MsgSend',
+      value: {
+        fromAddress: transaction.from,
+        toAddress: transaction.to,
+        amount: [
+          {
+            amount: String(transaction.value),
+            denom: requestedNetwork!.nativeDenom!,
+          },
+        ],
+      },
+    };
+  }, [requestedNetwork, transaction]);
+
+  useEffect(() => {
+    if (namespace !== COSMOS) {
+      return;
+    }
+
+    const setClient = async () => {
+      if (!account) {
+        return;
+      }
+
+      const cosmosPrivKey = (
+        await getPathKey(
+          `${requestedNetwork?.namespace}:${requestedNetwork?.chainId}`,
+          account.index,
+        )
+      ).privKey;
+
+      const sender = await DirectSecp256k1Wallet.fromKey(
+        Buffer.from(cosmosPrivKey.split('0x')[1], 'hex'),
+        requestedNetwork?.addressPrefix,
+      );
+
+      try {
+        const client = await SigningStargateClient.connectWithSigner(
+          requestedNetwork?.rpcUrl!,
+          sender,
+        );
+
+        setCosmosStargateClient(client);
+      } catch (error: any) {
+        setTxError(error.message);
+        setIsTxErrorDialogOpen(true);
+      }
+    };
+
+    setClient();
+  }, [account, requestedNetwork, chainId, namespace]);
+
+  const provider = useMemo(() => {
+    if (namespace === EIP155) {
+      if (!requestedNetwork) {
+        throw new Error('Requested chain not supported');
+      }
+      try {
+        const ethProvider = new providers.JsonRpcProvider(
+          requestedNetwork.rpcUrl,
+        );
+
+        return ethProvider;
+      } catch (error: any) {
+        setTxError(error.message);
+        setIsTxErrorDialogOpen(true);
+      }
+    }
+  }, [requestedNetwork, namespace]);
+
+  const navigation =
+    useNavigation<NativeStackNavigationProp<StackParamsList>>();
+
+  const retrieveData = useCallback(
+    async (requestAddress: string) => {
+      const requestAccount = await retrieveSingleAccount(
+        requestedNetwork!.namespace,
+        requestedNetwork!.chainId,
+        requestAddress,
+      );
+      if (!requestAccount) {
+        navigation.navigate('InvalidPath');
+        return;
+      }
+
+      setAccount(requestAccount);
+    },
+    [navigation, requestedNetwork],
+  );
+
+  useEffect(() => {
+    // Set loading to false when gas values for requested chain are fetched
+    // If requested chain is EVM compatible, the cosmos gas values will be undefined and vice-versa, hence the condition checks only one of them at the same time
+    if (
+      // If requested chain is EVM compatible, set loading to false when ethMaxFee and ethPriorityFee have been populated
+      (ethMaxFee !== undefined && ethMaxPriorityFee !== undefined) ||
+      // Or if requested chain is a cosmos chain, set loading to false when cosmosGasLimit has been populated
+      cosmosGasLimit !== undefined
+    ) {
+      setIsLoading(false);
+    }
+  }, [ethMaxFee, ethMaxPriorityFee, cosmosGasLimit]);
+
+  useEffect(() => {
+    if (namespace === EIP155) {
+      const ethFees = BigNumber.from(ethGasLimit ?? 0)
+        .mul(BigNumber.from(ethMaxFee ?? ethGasPrice ?? 0))
+        .toString();
+      setFees(ethFees);
+    } else {
+      const gasPrice = GasPrice.fromString(
+        requestedNetwork?.gasPrice! + requestedNetwork?.nativeDenom,
+      );
+
+      if (!cosmosGasLimit) {
+        return;
+      }
+
+      const cosmosFees = calculateFee(Number(cosmosGasLimit), gasPrice);
+
+      setFees(cosmosFees.amount[0].amount);
+    }
+  }, [
+    transaction,
+    namespace,
+    ethGasLimit,
+    ethGasPrice,
+    cosmosGasLimit,
+    requestedNetwork,
+    ethMaxFee,
+  ]);
+  useEffect(() => {
+    retrieveData(transaction.from!);
+  }, [retrieveData, transaction]);
+
+  const isEIP1559 = useMemo(() => {
+    if (cosmosGasLimit) {
+      return;
+    }
+    if (ethMaxFee !== null && ethMaxPriorityFee !== null) {
+      return true;
+    }
+    return false;
+  }, [cosmosGasLimit, ethMaxFee, ethMaxPriorityFee]);
+
+  const acceptRequestHandler = async () => {
+    setIsTxLoading(true);
+    try {
+      if (!account) {
+        throw new Error('account not found');
+      }
+
+      if (ethGasLimit && ethGasLimit.lt(ETH_MINIMUM_GAS)) {
+        throw new Error(`Atleast ${ETH_MINIMUM_GAS} gas limit is required`);
+      }
+
+      if (ethMaxFee && ethMaxPriorityFee && ethMaxFee.lte(ethMaxPriorityFee)) {
+        throw new Error(
+          `Max fee per gas (${ethMaxFee.toNumber()}) cannot be lower than or equal to max priority fee per gas (${ethMaxPriorityFee.toNumber()})`,
+        );
+      }
+
+      let options: WalletConnectRequests;
+
+      switch (requestMethod) {
+        case EIP155_SIGNING_METHODS.ETH_SEND_TRANSACTION:
+          if (
+            ethMaxFee === undefined ||
+            ethMaxPriorityFee === undefined ||
+            ethGasPrice === undefined
+          ) {
+            throw new Error('Gas values not found');
+          }
+
+          options = {
+            type: 'eth_sendTransaction',
+            provider: provider!,
+            ethGasLimit: BigNumber.from(ethGasLimit),
+            ethGasPrice: ethGasPrice ? ethGasPrice.toHexString() : null,
+            maxFeePerGas: ethMaxFee,
+            maxPriorityFeePerGas: ethMaxPriorityFee,
+          };
+          break;
+        case COSMOS_METHODS.COSMOS_SEND_TOKENS:
+          if (!cosmosStargateClient) {
+            throw new Error('Cosmos stargate client not found');
+          }
+
+          options = {
+            type: 'cosmos_sendTokens',
+            signingStargateClient: cosmosStargateClient,
+            // StdFee object
+            cosmosFee: {
+              // This amount is total fees required for transaction
+              amount: [
+                {
+                  amount: fees!,
+                  denom: requestedNetwork!.nativeDenom!,
+                },
+              ],
+              gas: cosmosGasLimit!,
+            },
+            sendMsg,
+            memo: MEMO,
+          };
+
+          break;
+
+        default:
+          throw new Error('Invalid method');
+      }
+
+      const response = await approveWalletConnectRequest(
+        requestEvent,
+        account,
+        namespace,
+        requestedNetwork!.chainId,
+        options,
+      );
+
+      const { topic } = requestEvent;
+      await web3wallet!.respondSessionRequest({ topic, response });
+      navigation.navigate('Laconic');
+    } catch (error: any) {
+      setTxError(error.message);
+      setIsTxErrorDialogOpen(true);
+    }
+    setIsTxLoading(false);
+  };
+
+  const rejectRequestHandler = async () => {
+    const response = rejectWalletConnectRequest(requestEvent);
+    const { topic } = requestEvent;
+    await web3wallet!.respondSessionRequest({
+      topic,
+      response,
+    });
+
+    navigation.navigate('Laconic');
+  };
+
+  useEffect(() => {
+    const getAccountBalance = async () => {
+      try {
+        if (!account) {
+          return;
+        }
+        if (namespace === EIP155) {
+          if (!provider) {
+            return;
+          }
+          const fetchedBalance = await provider.getBalance(account.address);
+          setBalance(fetchedBalance ? fetchedBalance.toString() : '0');
+        } else {
+          const cosmosBalance = await cosmosStargateClient?.getBalance(
+            account.address,
+            requestedNetwork!.nativeDenom!.toLowerCase(),
+          );
+
+          setBalance(cosmosBalance?.amount!);
+        }
+      } catch (error: any) {
+        setTxError(error.message);
+        setIsTxErrorDialogOpen(true);
+      }
+    };
+
+    getAccountBalance();
+  }, [account, provider, namespace, cosmosStargateClient, requestedNetwork]);
+
+  useEffect(() => {
+    navigation.setOptions({
+      // eslint-disable-next-line react/no-unstable-nested-components
+      header: ({ options, back }) => {
+        const title = getHeaderTitle(options, 'Approve Transaction');
+
+        return (
+          <Appbar.Header>
+            {back && (
+              <Appbar.BackAction
+                onPress={async () => {
+                  await rejectRequestHandler();
+                  navigation.navigate('Laconic');
+                }}
+              />
+            )}
+            <Appbar.Content title={title} />
+          </Appbar.Header>
+        );
+      },
+    });
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [navigation, route.name]);
+
+  useEffect(() => {
+    const getEthGas = async () => {
+      try {
+        if (!isSufficientFunds || !provider) {
+          return;
+        }
+
+        const data = await provider.getFeeData();
+
+        setEthMaxFee(data.maxFeePerGas);
+        setEthMaxPriorityFee(data.maxPriorityFeePerGas);
+        setEthGasPrice(data.gasPrice);
+
+        if (transaction.gasLimit) {
+          setEthGasLimit(BigNumber.from(transaction.gasLimit));
+        } else {
+          const transactionObject: Deferrable<providers.TransactionRequest> = {
+            from: transaction.from!,
+            to: transaction.to!,
+            data: transaction.data!,
+            value: transaction.value!,
+            maxFeePerGas: data.maxFeePerGas ?? undefined,
+            maxPriorityFeePerGas: data.maxPriorityFeePerGas ?? undefined,
+            gasPrice: data.maxFeePerGas
+              ? undefined
+              : data.gasPrice ?? undefined,
+          };
+          const gasLimit = await provider.estimateGas(transactionObject);
+          setEthGasLimit(gasLimit);
+        }
+      } catch (error: any) {
+        setTxError(error.message);
+        setIsTxErrorDialogOpen(true);
+      }
+    };
+    getEthGas();
+  }, [provider, transaction, isSufficientFunds]);
+
+  useEffect(() => {
+    const getCosmosGas = async () => {
+      try {
+        if (!cosmosStargateClient) {
+          return;
+        }
+        if (!isSufficientFunds) {
+          return;
+        }
+
+        const gasEstimation = await cosmosStargateClient.simulate(
+          transaction.from!,
+          [sendMsg],
+          MEMO,
+        );
+
+        setCosmosGasLimit(
+          String(
+            Math.round(gasEstimation * Number(Config.DEFAULT_GAS_ADJUSTMENT)),
+          ),
+        );
+      } catch (error: any) {
+        setTxError(error.message);
+        setIsTxErrorDialogOpen(true);
+      }
+    };
+    getCosmosGas();
+  }, [cosmosStargateClient, isSufficientFunds, sendMsg, transaction]);
+
+  useEffect(() => {
+    if (balance && !isSufficientFunds) {
+      setTxError('Insufficient funds');
+      setIsTxErrorDialogOpen(true);
+    }
+  }, [isSufficientFunds, balance]);
+
+  return (
+    <>
+      {isLoading ? (
+        <View style={styles.spinnerContainer}>
+          <ActivityIndicator size="large" color="#0000ff" />
+        </View>
+      ) : (
+        <>
+          <ScrollView contentContainerStyle={styles.appContainer}>
+            <View style={styles.dappDetails}>
+              {requestIcon && (
+                <Image
+                  style={styles.dappLogo}
+                  source={requestIcon ? { uri: requestIcon } : undefined}
+                />
+              )}
+              <Text>{requestName}</Text>
+              <Text variant="bodyMedium">{requestURL}</Text>
+            </View>
+            <View style={styles.dataBoxContainer}>
+              <Text style={styles.dataBoxLabel}>From</Text>
+              <View style={styles.dataBox}>
+                <AccountDetails account={account} />
+              </View>
+            </View>
+            <DataBox
+              label={`Balance (${
+                namespace === EIP155 ? 'wei' : requestedNetwork!.nativeDenom
+              })`}
+              data={
+                balance === '' || balance === undefined
+                  ? 'Loading balance...'
+                  : `${balance}`
+              }
+            />
+            {transaction && (
+              <View style={styles.approveTransfer}>
+                <DataBox label="To" data={transaction.to!} />
+                <DataBox
+                  label={`Amount (${
+                    namespace === EIP155 ? 'wei' : requestedNetwork!.nativeDenom
+                  })`}
+                  data={BigNumber.from(
+                    transaction.value?.toString(),
+                  ).toString()}
+                />
+
+                {namespace === EIP155 ? (
+                  <>
+                    {isEIP1559 === false ? (
+                      <>
+                        <Text style={styles.dataBoxLabel}>
+                          {'Gas Price (wei)'}
+                        </Text>
+                        <TextInput
+                          mode="outlined"
+                          value={ethGasPrice?.toNumber().toString()}
+                          onChangeText={value =>
+                            setEthGasPrice(BigNumber.from(value))
+                          }
+                          style={styles.transactionFeesInput}
+                        />
+                      </>
+                    ) : (
+                      <>
+                        <Text style={styles.dataBoxLabel}>
+                          Max Fee Per Gas (wei)
+                        </Text>
+                        <TextInput
+                          mode="outlined"
+                          value={ethMaxFee?.toNumber().toString()}
+                          onChangeText={value => {
+                            if (IS_NUMBER_REGEX.test(value)) {
+                              setEthMaxFee(BigNumber.from(value));
+                            }
+                          }}
+                          style={styles.transactionFeesInput}
+                        />
+                        <Text style={styles.dataBoxLabel}>
+                          Max Priority Fee Per Gas (wei)
+                        </Text>
+                        <TextInput
+                          mode="outlined"
+                          value={ethMaxPriorityFee?.toNumber().toString()}
+                          onChangeText={value => {
+                            if (IS_NUMBER_REGEX.test(value)) {
+                              setEthMaxPriorityFee(BigNumber.from(value));
+                            }
+                          }}
+                          style={styles.transactionFeesInput}
+                        />
+                      </>
+                    )}
+                    <Text style={styles.dataBoxLabel}>Gas Limit</Text>
+                    <TextInput
+                      mode="outlined"
+                      value={ethGasLimit?.toNumber().toString()}
+                      onChangeText={value => {
+                        if (IS_NUMBER_REGEX.test(value)) {
+                          setEthGasLimit(BigNumber.from(value));
+                        }
+                      }}
+                      style={styles.transactionFeesInput}
+                    />
+                    <DataBox
+                      label={`${
+                        isEIP1559 === true ? 'Max Fee' : 'Gas Fee'
+                      } (wei)`}
+                      data={fees!}
+                    />
+                    <DataBox label="Data" data={transaction.data!} />
+                  </>
+                ) : (
+                  <>
+                    <Text style={styles.dataBoxLabel}>{`Fee (${
+                      requestedNetwork!.nativeDenom
+                    })`}</Text>
+                    <TextInput
+                      mode="outlined"
+                      value={fees}
+                      onChangeText={value => setFees(value)}
+                      style={styles.transactionFeesInput}
+                    />
+                    <Text style={styles.dataBoxLabel}>Gas Limit</Text>
+                    <TextInput
+                      mode="outlined"
+                      value={cosmosGasLimit}
+                      onChangeText={value => {
+                        if (IS_NUMBER_REGEX.test(value)) {
+                          setCosmosGasLimit(value);
+                        }
+                      }}
+                    />
+                  </>
+                )}
+              </View>
+            )}
+          </ScrollView>
+          <View style={styles.buttonContainer}>
+            <Button
+              mode="contained"
+              onPress={acceptRequestHandler}
+              loading={isTxLoading}
+              disabled={!balance || !fees}>
+              {isTxLoading ? 'Processing' : 'Yes'}
+            </Button>
+            <Button
+              mode="contained"
+              onPress={rejectRequestHandler}
+              buttonColor="#B82B0D">
+              No
+            </Button>
+          </View>
+        </>
+      )}
+      <TxErrorDialog
+        error={txError!}
+        visible={isTxErrorDialogOpen}
+        hideDialog={() => {
+          setIsTxErrorDialogOpen(false);
+          if (!isSufficientFunds || !balance || !fees) {
+            rejectRequestHandler();
+            navigation.navigate('Laconic');
+          }
+        }}
+      />
+    </>
+  );
+};
+
+export default ApproveTransfer;

src/screens/HomeScreen.tsx

@@ -29,8 +29,7 @@ const WCLogo = () => {
 };
 
 const HomeScreen = () => {
-  const { accounts, setAccounts, currentIndex, setCurrentIndex } =
-    useAccounts();
+  const { accounts, setAccounts, setCurrentIndex } = useAccounts();
 
   const { networksData, selectedNetwork, setSelectedNetwork, setNetworksData } =
     useNetworks();
@@ -123,10 +122,6 @@ const HomeScreen = () => {
     setCurrentIndex(0);
   };
 
-  const updateIndex = (index: number) => {
-    setCurrentIndex(index);
-  };
-
   useEffect(() => {
     fetchAccounts();
   }, [networksData, setAccounts, selectedNetwork, fetchAccounts]);
@@ -142,7 +137,7 @@ const HomeScreen = () => {
         <>
           <NetworkDropdown updateNetwork={updateNetwork} />
           <View style={styles.accountComponent}>
-            <Accounts currentIndex={currentIndex} updateIndex={updateIndex} />
+            <Accounts />
           </View>
           <View style={styles.resetContainer}>
             <Button

src/styles/stylesheet.js

@@ -136,7 +136,7 @@ const styles = StyleSheet.create({
     justifyContent: 'center',
     padding: 8,
   },
-  approveTransaction: {
+  approveTransfer: {
     height: '40%',
     marginBottom: 30,
   },
@@ -213,10 +213,10 @@ const styles = StyleSheet.create({
   },
   messageBody: {
     borderWidth: 1,
-    borderRadius: 10,
+    borderRadius: 6,
     paddingVertical: 10,
     paddingHorizontal: 10,
-    marginVertical: 20,
+    marginVertical: 3,
   },
   cameraContainer: {
     justifyContent: 'center',
@@ -272,6 +272,16 @@ const styles = StyleSheet.create({
     marginVertical: 10,
   },
   transactionFeesInput: { marginBottom: 10 },
+  approveTransaction: {
+    flexGrow: 1,
+    marginTop: 0,
+    paddingHorizontal: 24,
+    paddingVertical: 5,
+  },
+  transactionLabel: {
+    fontWeight: '700',
+    padding: 8,
+  },
 });
 
 export default styles;

src/types.ts

@@ -2,6 +2,7 @@ import { PopulatedTransaction } from 'ethers';
 
 import { SignClientTypes, SessionTypes } from '@walletconnect/types';
 import { Web3WalletTypes } from '@walletconnect/web3wallet';
+import { EncodeObject } from '@cosmjs/proto-signing';
 
 export type StackParamsList = {
   Laconic: undefined;
@@ -17,7 +18,7 @@ export type StackParamsList = {
     requestEvent?: Web3WalletTypes.SessionRequest;
     requestSessionData?: SessionTypes.Struct;
   };
-  ApproveTransaction: {
+  ApproveTransfer: {
     transaction: PopulatedTransaction;
     requestEvent: Web3WalletTypes.SessionRequest;
     requestSessionData: SessionTypes.Struct;
@@ -29,6 +30,12 @@ export type StackParamsList = {
   EditNetwork: {
     selectedNetwork: NetworksDataState;
   };
+  ApproveTransaction: {
+    transactionMessage: EncodeObject;
+    signer: string;
+    requestEvent: Web3WalletTypes.SessionRequest;
+    requestSessionData: SessionTypes.Struct;
+  };
 };
 
 export type Account = {
@@ -38,11 +45,6 @@ export type Account = {
   hdPath: string;
 };
 
-export type AccountsProps = {
-  currentIndex: number;
-  updateIndex: (index: number) => void;
-};
-
 export type NetworkDropdownProps = {
   updateNetwork: (networksData: NetworksDataState) => void;
 };
@@ -88,7 +90,6 @@ export type HDPathDialogProps = {
   pathCode: string;
   visible: boolean;
   hideDialog: () => void;
-  updateIndex: (index: number) => void;
   updateAccounts: (account: Account) => void;
 };
 

src/utils/wallet-connect/COSMOSData.ts

@@ -38,4 +38,5 @@ export const COSMOS_SIGNING_METHODS = {
 export const COSMOS_METHODS = {
   ...COSMOS_SIGNING_METHODS,
   COSMOS_SEND_TOKENS: 'cosmos_sendTokens', // Added for pay.laconic.com
+  COSMOS_SEND_TRANSACTION: 'cosmos_sendTransaction', // Added for testnet onboarding app
 };

src/utils/wallet-connect/wallet-connect-requests.ts

@@ -9,6 +9,8 @@ import {
   StdFee,
   MsgSendEncodeObject,
 } from '@cosmjs/stargate';
+import { EncodeObject } from '@cosmjs/proto-signing';
+import { LaconicClient } from '@cerc-io/registry-sdk';
 
 import { EIP155_SIGNING_METHODS } from './EIP155Data';
 import { signDirectMessage, signEthMessage } from '../sign-message';
@@ -49,12 +51,20 @@ interface CosmosSendTokens {
   memo: string;
 }
 
+interface CosmosSendTransaction {
+  type: 'cosmos_sendTransaction';
+  LaconicClient: LaconicClient;
+  cosmosFee: StdFee;
+  txMsg: EncodeObject;
+}
+
 export type WalletConnectRequests =
   | EthSendTransaction
   | EthPersonalSign
   | CosmosSignDirect
   | CosmosSignAmino
-  | CosmosSendTokens;
+  | CosmosSendTokens
+  | CosmosSendTransaction;
 
 export async function approveWalletConnectRequest(
   requestEvent: SignClientTypes.EventArguments['session_request'],
@@ -181,6 +191,20 @@ export async function approveWalletConnectRequest(
         signature: result.transactionHash,
       });
 
+    case COSMOS_METHODS.COSMOS_SEND_TRANSACTION:
+      if (!(options.type === 'cosmos_sendTransaction')) {
+        throw new Error('Incorrect parameters passed');
+      }
+      const resultFromTx = await options.LaconicClient.signAndBroadcast(
+        address,
+        [options.txMsg],
+        options.cosmosFee,
+      );
+
+      return formatJsonRpcResult(id, {
+        code: resultFromTx.code,
+      });
+
     default:
       throw new Error(getSdkError('INVALID_METHOD').message);
   }