Send USDC

import { BrowserSDK, AddressType } from "@phantom/browser-sdk";
import { Connection, PublicKey, VersionedTransaction, TransactionMessage } from "@solana/web3.js";
import { getAssociatedTokenAddress, createAssociatedTokenAccountInstruction, createTransferInstruction, getAccount } from "@solana/spl-token";

const USDC_MINT = new PublicKey("EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v");
const USDC_DECIMALS = 6;

const sdk = new BrowserSDK({
  providers: ["google", "apple", "injected"],
  appId: "your-app-id",
  addressTypes: [AddressType.solana],
});

async function sendUSDC(to: string, amount: number) {
  const connection = new Connection("https://api.mainnet-beta.solana.com");
  const from = new PublicKey(await sdk.solana.getPublicKey());
  const recipient = new PublicKey(to);

  const fromATA = await getAssociatedTokenAddress(USDC_MINT, from);
  const toATA = await getAssociatedTokenAddress(USDC_MINT, recipient);

  const instructions = [];

  try {
    await getAccount(connection, toATA);
  } catch {
    instructions.push(
      createAssociatedTokenAccountInstruction(from, toATA, recipient, USDC_MINT)
    );
  }

  instructions.push(
    createTransferInstruction(fromATA, toATA, from, amount * 10 ** USDC_DECIMALS)
  );

  const { blockhash } = await connection.getLatestBlockhash();
  const transaction = new VersionedTransaction(
    new TransactionMessage({
      payerKey: from,
      recentBlockhash: blockhash,
      instructions,
    }).compileToV0Message()
  );

  const { signature } = await sdk.solana.signAndSendTransaction(transaction);
  return signature;
}

import { useSolana } from "@phantom/react-native-sdk";
import { Connection, PublicKey, VersionedTransaction, TransactionMessage } from "@solana/web3.js";
import { getAssociatedTokenAddress, createAssociatedTokenAccountInstruction, createTransferInstruction, getAccount } from "@solana/spl-token";
import { View, Button, Alert, StyleSheet } from "react-native";

const USDC_MINT = new PublicKey("EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v");
const USDC_DECIMALS = 6;

function SendUSDC() {
  const { solana } = useSolana();

  const send = async (to: string, amount: number) => {
    try {
      const connection = new Connection("https://api.mainnet-beta.solana.com");
      const from = new PublicKey(await solana.getPublicKey());
      const recipient = new PublicKey(to);

      const fromATA = await getAssociatedTokenAddress(USDC_MINT, from);
      const toATA = await getAssociatedTokenAddress(USDC_MINT, recipient);

      const instructions = [];

      try {
        await getAccount(connection, toATA);
      } catch {
        instructions.push(
          createAssociatedTokenAccountInstruction(from, toATA, recipient, USDC_MINT)
        );
      }

      instructions.push(
        createTransferInstruction(fromATA, toATA, from, amount * 10 ** USDC_DECIMALS)
      );

      const { blockhash } = await connection.getLatestBlockhash();
      const transaction = new VersionedTransaction(
        new TransactionMessage({
          payerKey: from,
          recentBlockhash: blockhash,
          instructions,
        }).compileToV0Message()
      );

      const { signature } = await solana.signAndSendTransaction(transaction);
      Alert.alert("Success", `Transaction sent: ${signature}`);
      return signature;
    } catch (error) {
      Alert.alert("Error", error instanceof Error ? error.message : "Transaction failed");
      throw error;
    }
  };

  return (
    <View style={styles.container}>
      <Button
        title="Send 10 USDC"
        onPress={() => send("RECIPIENT_ADDRESS", 10)}
      />
    </View>
  );
}

const styles = StyleSheet.create({
  container: {
    padding: 20,
  },
});