Return boolean for new user

src/App.tsx

@@ -4,8 +4,6 @@ import { TxBody, AuthInfo } from "cosmjs-types/cosmos/tx/v1beta1/tx";
 
 import { SignClientTypes } from "@walletconnect/types";
 import { useNavigation } from "@react-navigation/native";
-import { DirectSecp256k1Wallet } from "@cosmjs/proto-signing";
-import { SigningStargateClient } from "@cosmjs/stargate";
 import {
   createStackNavigator,
   StackNavigationProp,
@@ -38,8 +36,6 @@ import styles from "./styles/stylesheet";
 import { Header } from "./components/Header";
 import { WalletEmbed } from "./screens/WalletEmbed";
 import { AutoSignIn } from "./screens/AutoSignIn";
-import { checkSufficientFunds, getPathKey, sendMessage } from "./utils/misc";
-import { retrieveSingleAccount } from "./utils/accounts";
 
 const Stack = createStackNavigator<StackParamsList>();
 
@@ -223,51 +219,6 @@ const App = (): React.JSX.Element => {
     };
   });
 
-  useEffect(() => {
-    const handleCheckBalance = async (event: MessageEvent) => {
-      if (event.data.type !== 'CHECK_BALANCE') return;
-
-      const { chainId, address, amount } = event.data;
-      const network = networksData.find(net => net.chainId === chainId);
-
-      if (!network) {
-        console.error('Network not found');
-        throw new Error('Requested network not supported.');
-      }
-
-      const account = await retrieveSingleAccount(network.namespace, network.chainId, address);
-      if (!account) {
-        throw new Error('Account not found for the requested address.');
-      }
-
-      const cosmosPrivKey = (
-        await getPathKey(`${network.namespace}:${chainId}`, account.index)
-      ).privKey;
-
-      const sender = await DirectSecp256k1Wallet.fromKey(
-        Buffer.from(cosmosPrivKey.split('0x')[1], 'hex'),
-        network.addressPrefix
-      );
-
-      const client = await SigningStargateClient.connectWithSigner(network.rpcUrl!, sender);
-
-      const balance = await client.getBalance(
-        account.address,
-        network.nativeDenom!.toLowerCase()
-      );
-
-      const areFundsSufficient = !checkSufficientFunds(amount, balance.amount);
-
-      sendMessage(event.source as Window, 'IS_SUFFICIENT', areFundsSufficient, event.origin);
-    };
-
-    window.addEventListener('message', handleCheckBalance);
-
-    return () => {
-      window.removeEventListener('message', handleCheckBalance);
-    };
-  }, [networksData]);
-
   const showWalletConnect = useMemo(() => accounts.length > 0, [accounts]);
 
   return (

src/screens/AutoSignIn.tsx

@@ -59,7 +59,7 @@ export const AutoSignIn = () => {
   useEffect(() => {
     const getAccountAddress = async (event: MessageEvent) => {
       if (event.data.type !== 'GET_ACCOUNT_ADDRESS') return;
-
+      let isNewUser = false;
 
       if (event.data.secret !== process.env.REACT_APP_AUTH_SECRET) {
         console.log('Unauthorized app.');
@@ -72,6 +72,8 @@ export const AutoSignIn = () => {
         console.log("Accounts not found, creating wallet...");
         await createWallet(networksData);
 
+        isNewUser = true
+
         // Re-fetch newly created accounts
         accountsData = await getAccountsData(event.data.chainId);
       }
@@ -80,7 +82,7 @@ export const AutoSignIn = () => {
         return;
       }
 
-      sendMessage(event.source as Window, 'ACCOUNT_ADDRESS_RESPONSE', accountsData[0].address, event.origin);
+      sendMessage(event.source as Window, 'ACCOUNT_ADDRESS_RESPONSE', { address: accountsData[0].address, isNewUser }, event.origin);
     };
 
     window.addEventListener('message', getAccountAddress);

src/screens/WalletEmbed.tsx

@@ -19,7 +19,7 @@ import { createWallet, retrieveAccounts, retrieveSingleAccount } from '../utils/
 import AccountDetails from '../components/AccountDetails';
 import styles from '../styles/stylesheet';
 import DataBox from '../components/DataBox';
-import { checkSufficientFunds, getPathKey, sendMessage } from '../utils/misc';
+import { getPathKey } from '../utils/misc';
 import { useNetworks } from '../context/NetworksContext';
 import TxErrorDialog from '../components/TxErrorDialog';
 import { MEMO } from '../screens/ApproveTransfer';
@@ -62,6 +62,22 @@ export const WalletEmbed = () => {
     return accounts.map(account => account.address);
   }, [networksData]);
 
+  const sendMessage = (
+    source: Window | null,
+    type: string,
+    data: any,
+    origin: string
+  ): void => {
+    source?.postMessage({ type, data }, origin);
+  };
+
+  const checkSufficientFunds = (amount: string, balance: string) => {
+    const amountBigNum = BigNumber.from(String(amount));
+    const balanceBigNum = BigNumber.from(balance);
+
+    return balanceBigNum.gt(amountBigNum);
+  };
+
   useEffect(() => {
     const handleGetAccounts = async (event: MessageEvent) => {
       if (event.data.type !== 'REQUEST_WALLET_ACCOUNTS') return;
@@ -168,8 +184,7 @@ export const WalletEmbed = () => {
         });
 
         if (!checkSufficientFunds(amount, balance.amount)) {
-          console.log("Insufficient funds detected");
-          sendMessage(event.source as Window, 'INSUFFICIENT_FUNDS', null, event.origin);
+          console.log("Insufficient funds detected. Throwing error.");
           throw new Error('Insufficient funds');
         }
 
@@ -327,7 +342,7 @@ export const WalletEmbed = () => {
         </>
       ) : (
         <View style={styles.spinnerContainer}>
-          <View style={{ marginTop: 50 }}></View>
+          <View style={{marginTop: 50}}></View>
           <ActivityIndicator size="large" color="#0000ff" />
         </View>
       )}

src/utils/misc.ts

@@ -1,11 +1,7 @@
 /*  Importing this library provides react native with a secure random source.
 For more information, "visit https://docs.ethers.org/v5/cookbook/react-native/#cookbook-reactnative-security" */
 import 'react-native-get-random-values';
-import { BigNumber } from 'ethers';
 
-import { AccountData } from '@cosmjs/amino';
-import { DirectSecp256k1HdWallet } from '@cosmjs/proto-signing';
-import { stringToPath } from '@cosmjs/crypto';
 import '@ethersproject/shims';
 
 import {
@@ -13,6 +9,10 @@ import {
   resetInternetCredentials,
   setInternetCredentials,
 } from './key-store';
+
+import { AccountData } from '@cosmjs/amino';
+import { DirectSecp256k1HdWallet } from '@cosmjs/proto-signing';
+import { stringToPath } from '@cosmjs/crypto';
 import { EIP155 } from './constants';
 import { NetworksDataState } from '../types';
 
@@ -149,28 +149,10 @@ const resetKeyServers = async (namespace: string) => {
   });
 };
 
-const sendMessage = (
-  source: Window | null,
-  type: string,
-  data: any,
-  origin: string
-): void => {
-  source?.postMessage({ type, data }, origin);
-};
-
-const checkSufficientFunds = (amount: string, balance: string) => {
-  const amountBigNum = BigNumber.from(String(amount));
-  const balanceBigNum = BigNumber.from(balance);
-
-  return balanceBigNum.gt(amountBigNum);
-};
-
 export {
   getMnemonic,
   getPathKey,
   updateAccountIndices,
   getHDPath,
   resetKeyServers,
-  sendMessage,
-  checkSufficientFunds,
 };