transfer-interface.ts

import "dotenv/config";
import { Keypair } from "@solana/web3.js";
import { createRpc } from "@lightprotocol/stateless.js";
import {
    createMintInterface,
    createAtaInterface,
    mintToInterface,
    transferInterface,
    getAssociatedTokenAddressInterface,
} from "@lightprotocol/compressed-token";
import { homedir } from "os";
import { readFileSync } from "fs";

// devnet:
// const RPC_URL = `https://devnet.helius-rpc.com?api-key=${process.env.API_KEY!}`;
// const rpc = createRpc(RPC_URL);
// localnet:
const rpc = createRpc();

const payer = Keypair.fromSecretKey(
    new Uint8Array(
        JSON.parse(readFileSync(`${homedir()}/.config/solana/id.json`, "utf8"))
    )
);

(async function () {
    const { mint } = await createMintInterface(rpc, payer, payer, null, 9);

    const sender = Keypair.generate();
    await createAtaInterface(rpc, payer, mint, sender.publicKey);
    const senderAta = getAssociatedTokenAddressInterface(
        mint,
        sender.publicKey
    );
    await mintToInterface(rpc, payer, mint, senderAta, payer, 1_000_000_000);

    const recipient = Keypair.generate();

    const tx = await transferInterface(
        rpc,
        payer,
        senderAta,
        mint,
        recipient.publicKey,
        sender.publicKey,
        sender,
        500_000_000
    );

    console.log("Tx:", tx);
})();