React Native with Privy

npx expo install @privy-io/expo @privy-io/expo-native-extensions permissionless \
  react-native-passkeys expo-application expo-crypto expo-linking expo-secure-store expo-web-browser
npm install @pesa/sdk viem @stellar/stellar-sdk

import { PrivyProvider } from "@privy-io/expo";
import { SmartWalletsProvider } from "@privy-io/expo/smart-wallets";

export function Root({ children }) {
  return (
    <PrivyProvider appId={process.env.EXPO_PUBLIC_PRIVY_APP_ID!}>
      <SmartWalletsProvider>{children}</SmartWalletsProvider>
    </PrivyProvider>
  );
}

import { useCreateWallet } from "@privy-io/expo/extended-chains";
import { useSmartWallets } from "@privy-io/expo/smart-wallets";

const { createWallet } = useCreateWallet();
await createWallet({ chainType: "stellar" });            // the user's Stellar account

const { getClientForChain } = useSmartWallets();
const base = await getClientForChain({ chainId: 8453 }); // the deposit address on Base

import { getAccessToken } from "@privy-io/expo";
import { createTransfersClient, findEvmChain, STELLAR_CCTP, verifyCctpCalls, verifySendToAddress } from "@pesa/sdk";

const pesa = createTransfersClient({ baseUrl: "https://api.pesapay.xyz", getToken: () => getAccessToken() });

const quote = await pesa.quote({
  route: "cctp-deposit",
  source_chain: "eip155:8453",
  source_address: base.account.address,
  dest_address: stellarAddress,
  amount_in: "20000000",
  funding_mode: "deposit_address",
});
const transfer = await pesa.createTransfer(quote.id, crypto.randomUUID());

// 1. Show the address until the funds arrive.
const first = await pesa.getActions(transfer.id);
verifySendToAddress(first!, { chain: "eip155:8453", address: base.account.address, amount: "20000000" });

// 2. Once FUNDED, burn in one sponsored, batched transaction.
const next = await pesa.getActions(transfer.id);
if (next?.kind === "evm_calls") {
  const calls = next.calls.map((c) => ({ ...c, value: BigInt(c.value) }));
  verifyCctpCalls(calls, {
    chain: findEvmChain("mainnet", "eip155:8453"),
    stellar: STELLAR_CCTP.mainnet,
    recipient: stellarAddress,
    amount6: 20_000_000n,
  });
  const hash = await base.sendTransaction({ calls });
  await pesa.submit(transfer.id, { kind: "evm_tx", hash });
}