BlueWallet/components/WatchConnectivity.ios.js

import { useCallback, useEffect, useRef } from 'react';
import {
  transferCurrentComplicationUserInfo,
  transferUserInfo,
  updateApplicationContext,
  useInstalled,
  usePaired,
  useReachability,
  watchEvents,
} from 'react-native-watch-connectivity';
import Notifications from '../blue_modules/notifications';
import { MultisigHDWallet } from '../class';
import loc, { formatBalance, transactionTimeToReadable } from '../loc';
import { Chain } from '../models/bitcoinUnits';
import { FiatUnit } from '../models/fiatUnit';
import { useSettings } from '../hooks/context/useSettings';
import { useStorage } from '../hooks/context/useStorage';

function WatchConnectivity() {
  const { walletsInitialized, wallets, fetchWalletTransactions, saveToDisk, txMetadata } = useStorage();
  const { preferredFiatCurrency } = useSettings();
  const isReachable = useReachability();
  const isInstalled = useInstalled();
  const isPaired = usePaired();
  const messagesListenerActive = useRef(false);
  const lastPreferredCurrency = useRef(FiatUnit.USD.endPointKey);

  useEffect(() => {
    if (!isInstalled || !isPaired || !walletsInitialized || !isReachable) {
      console.debug('Apple Watch not installed, not paired, or other conditions not met. Exiting message listener setup.');
      return;
    }

    const messagesListener = watchEvents.addListener('message', handleMessages);
    messagesListenerActive.current = true;

    return () => {
      messagesListener();
      messagesListenerActive.current = false;
    };
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, [walletsInitialized, isReachable, isInstalled, isPaired]);

  useEffect(() => {
    if (!isInstalled || !isPaired || !walletsInitialized) {
      console.debug('Apple Watch not installed, not paired, or wallets not initialized. Skipping wallet data transfer.');
      return;
    }

    (async () => {
      try {
        const walletsToProcess = await constructWalletsToSendToWatch();
        if (walletsToProcess) {
          if (isReachable) {
            transferUserInfo(walletsToProcess);
            console.debug('Apple Watch: sent info to watch transferUserInfo');
          } else {
            updateApplicationContext(walletsToProcess);
            console.debug('Apple Watch: sent info to watch context');
          }
        }
      } catch (error) {
        console.debug('Failed to send wallets to watch:', error);
      }
    })();
  }, [walletsInitialized, wallets, isReachable, isInstalled, isPaired, constructWalletsToSendToWatch]);

  useEffect(() => {
    if (!isInstalled || !isPaired || !walletsInitialized || !isReachable) {
      console.debug('Apple Watch not installed, not paired, or other conditions not met. Skipping application context update.');
      return;
    }

    updateApplicationContext({ isWalletsInitialized: walletsInitialized, randomID: Math.floor(Math.random() * 11) });
  }, [isReachable, walletsInitialized, isInstalled, isPaired]);

  useEffect(() => {
    if (!isInstalled || !isPaired || !walletsInitialized || !isReachable || !preferredFiatCurrency) {
      console.debug('Apple Watch not installed, not paired, or other conditions not met. Skipping preferred fiat currency update.');
      return;
    }

    const preferredFiatCurrencyParsed = preferredFiatCurrency ?? FiatUnit.USD;
    if (lastPreferredCurrency.current !== preferredFiatCurrencyParsed.endPointKey) {
      try {
        transferCurrentComplicationUserInfo(
          {
            preferredFiatCurrency: preferredFiatCurrencyParsed.endPointKey,
          },
          [wallets, walletsInitialized, txMetadata],
        );
        lastPreferredCurrency.current = preferredFiatCurrencyParsed.endPointKey;
        console.debug('Apple Watch: updated preferred fiat currency');
      } catch (error) {
        console.debug('Error updating preferredFiatCurrency on watch:', error);
      }
    } else {
      console.debug('WatchConnectivity lastPreferredCurrency has not changed');
    }
  }, [preferredFiatCurrency, walletsInitialized, isReachable, isInstalled, isPaired, txMetadata, wallets]);

  const handleMessages = async (message, reply) => {
    try {
      if (message.request === 'createInvoice') {
        const createInvoiceRequest = await handleLightningInvoiceCreateRequest(message.walletIndex, message.amount, message.description);
        reply({ invoicePaymentRequest: createInvoiceRequest });
      } else if (message.message === 'sendApplicationContext') {
        const walletsToProcess = await constructWalletsToSendToWatch();
        if (walletsToProcess) updateApplicationContext(walletsToProcess);
      } else if (message.message === 'fetchTransactions') {
        await fetchWalletTransactions();
        await saveToDisk();
        reply({});
      } else if (message.message === 'hideBalance') {
        wallets[message.walletIndex].hideBalance = message.hideBalance;
        await saveToDisk();
        reply({});
      }
    } catch (error) {
      console.debug('Error handling message:', error);
      reply({});
    }
  };

  const handleLightningInvoiceCreateRequest = async (walletIndex, amount, description = loc.lnd.placeholder) => {
    const wallet = wallets[walletIndex];
    if (wallet.allowReceive() && amount > 0) {
      try {
        const invoiceRequest = await wallet.addInvoice(amount, description);

        try {
          if (await Notifications.isNotificationsEnabled()) {
            const decoded = await wallet.decodeInvoice(invoiceRequest);
            Notifications.majorTomToGroundControl([], [decoded.payment_hash], []);
          }
        } catch (notificationError) {
          console.debug('WatchConnectivity - Notification error or running in Simulator');
          console.debug(notificationError);
        }
        return invoiceRequest;
      } catch (invoiceError) {
        console.debug('Error creating invoice:', invoiceError);
      }
    }
  };

  const constructWalletsToSendToWatch = useCallback(async () => {
    if (!Array.isArray(wallets) || !walletsInitialized) return;

    const walletsToProcess = await Promise.all(
      wallets.map(async wallet => {
        let receiveAddress;
        try {
          receiveAddress = wallet.chain === Chain.ONCHAIN ? await wallet.getAddressAsync() : wallet.getAddress();
        } catch {
          receiveAddress =
            wallet.chain === Chain.ONCHAIN ? wallet._getExternalAddressByIndex(wallet.next_free_address_index) : wallet.getAddress();
        }

        const transactions = wallet.getTransactions(10).map(transaction => {
          const type = transaction.confirmations ? 'pendingConfirmation' : 'received';
          const amount = formatBalance(transaction.value, wallet.getPreferredBalanceUnit(), true).toString();
          const memo = txMetadata[transaction.hash]?.memo || transaction.memo || '';
          const time = transactionTimeToReadable(transaction.received);

          return { type, amount, memo, time };
        });

        return {
          label: wallet.getLabel(),
          balance: formatBalance(Number(wallet.getBalance()), wallet.getPreferredBalanceUnit(), true),
          type: wallet.type,
          preferredBalanceUnit: wallet.getPreferredBalanceUnit(),
          receiveAddress,
          transactions,
          hideBalance: wallet.hideBalance,
          ...(wallet.chain === Chain.ONCHAIN &&
            wallet.type !== MultisigHDWallet.type && {
              xpub: wallet.getXpub() || wallet.getSecret(),
            }),
          ...(wallet.allowBIP47() && wallet.isBIP47Enabled() && { paymentCode: wallet.getBIP47PaymentCode() }),
        };
      }),
    );

    console.debug('Constructed wallets to process for Apple Watch');
    return { wallets: walletsToProcess, randomID: Math.floor(Math.random() * 11) };
  }, [wallets, walletsInitialized, txMetadata]);

  return null;
}

export default WatchConnectivity;