create-ata.ts

import "dotenv/config";
import {
    Keypair,
    Transaction,
    sendAndConfirmTransaction,
} from "@solana/web3.js";
import { createRpc, CTOKEN_PROGRAM_ID } from "@lightprotocol/stateless.js";
import {
    createMintInterface,
    createAssociatedTokenAccountInterfaceInstruction,
    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 owner = Keypair.generate();
    const associatedToken = getAssociatedTokenAddressInterface(
        mint,
        owner.publicKey
    );

    const ix = createAssociatedTokenAccountInterfaceInstruction(
        payer.publicKey,
        associatedToken,
        owner.publicKey,
        mint,
        CTOKEN_PROGRAM_ID
    );

    const tx = new Transaction().add(ix);
    const signature = await sendAndConfirmTransaction(rpc, tx, [payer]);

    console.log("ATA:", associatedToken.toBase58());
    console.log("Tx:", signature);
})();