Batch Payments

A Solana transaction can contain one or more instructions that are executed sequentially and atomically by the network. This way, you can pack multiple transfers into a single transaction instead of sending e.g. three separate transactions. You send one transaction with three transfer instructions. Use just like with SPL token:

	SPL	Light
Transfer	createTransferInstruction()	createTransferInterfaceInstructions()

Agent skill

Use the payments agent skill to add light-token payment support to your project:

npx skills add Lightprotocol/skills

For orchestration, install the general skill:

npx skills add https://zkcompression.com

Guide
AI Prompt

Setup

Installation

npm
yarn
pnpm
SDK 2.0 (token-interface)

Install packages in your working directory:

npm install @lightprotocol/stateless.js@^0.23.0 \
            @lightprotocol/compressed-token@^0.23.0

Install the CLI globally:

npm install -g @lightprotocol/zk-compression-cli

Install packages in your working directory:

yarn add @lightprotocol/stateless.js@^0.23.0 \
         @lightprotocol/compressed-token@^0.23.0

Install the CLI globally:

yarn global add @lightprotocol/zk-compression-cli

Install packages in your working directory:

pnpm add @lightprotocol/stateless.js@^0.23.0 \
         @lightprotocol/compressed-token@^0.23.0

Install the CLI globally:

pnpm add -g @lightprotocol/zk-compression-cli

Install packages in your working directory:

# npm
npm install @lightprotocol/stateless.js@^0.23.0 \
            @lightprotocol/token-interface@^0.1.2

# yarn
yarn add @lightprotocol/stateless.js@^0.23.0 \
         @lightprotocol/token-interface@^0.1.2

# pnpm
pnpm add @lightprotocol/stateless.js@^0.23.0 \
         @lightprotocol/token-interface@^0.1.2

Install the CLI globally:

npm install -g @lightprotocol/zk-compression-cli

Localnet
Devnet

# start local test-validator in a separate terminal
light test-validator

In the code examples, use createRpc() without arguments for localnet.

Get an API key from Helius and add to .env:

.env

API_KEY=<your-helius-api-key>

In the code examples, use createRpc(RPC_URL) with the devnet URL.

import { createRpc } from "@lightprotocol/stateless.js";

const rpc = createRpc(RPC_ENDPOINT);

Create a Token Helper for Setup

setup.ts

import "dotenv/config";
import { Keypair } from "@solana/web3.js";
import { createRpc } from "@lightprotocol/stateless.js";
import {
    createMintInterface,
    createAtaInterface,
    getAssociatedTokenAddressInterface,
} from "@lightprotocol/compressed-token";
import { wrap } from "@lightprotocol/compressed-token/unified";
import {
    TOKEN_PROGRAM_ID,
    createAssociatedTokenAccount,
    mintTo,
} from "@solana/spl-token";
import { homedir } from "os";
import { readFileSync } from "fs";

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

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

/** Create SPL mint, fund payer, wrap into light-token ATA. */
export async function setup(amount = 1_000_000_000) {
    const { mint } = await createMintInterface(
        rpc,
        payer,
        payer,
        null,
        9,
        undefined,
        undefined,
        TOKEN_PROGRAM_ID
    );

    const splAta = await createAssociatedTokenAccount(
        rpc,
        payer,
        mint,
        payer.publicKey,
        undefined,
        TOKEN_PROGRAM_ID
    );
    await mintTo(rpc, payer, mint, splAta, payer, amount);

    await createAtaInterface(rpc, payer, mint, payer.publicKey);
    const senderAta = getAssociatedTokenAddressInterface(mint, payer.publicKey);
    await wrap(rpc, payer, splAta, senderAta, payer, mint, BigInt(amount));

    return { mint, senderAta, splAta };
}

Find full code examples: batch transfer.

Send to Multiple Recipients in One Transaction

Batching multiple transfers requires building each instruction separately, then combining them into a single transaction.The method createTransferInterfaceInstructions determines whether the sender’s account has a cold balance and adds load instructions if needed.

About loading: Light Token accounts reduce account rent ~200x by auto-compressing inactive accounts. Before any action, the SDK detects cold balances and adds instructions to load them. This almost always fits in a single atomic transaction with your regular transfer. APIs return TransactionInstruction[][] so the same loop handles the rare multi-transaction case automatically.

SDK 2.0 (@lightprotocol/token-interface) is the latest JavaScript SDK. It has better API ergonomics, guarantees single-instruction loading, and is compatible with KIT (the new Solana SDKs).

import {
    Keypair,
    Transaction,
    sendAndConfirmTransaction,
} from "@solana/web3.js";
import {
    createTransferInterfaceInstructions,
    getAtaInterface,
    getAssociatedTokenAddressInterface,
} from "@lightprotocol/compressed-token/unified";
import { rpc, payer, setup } from "../setup.js";

(async function () {
    const { mint } = await setup();

    const recipients = [
        { address: Keypair.generate().publicKey, amount: 100 },
        { address: Keypair.generate().publicKey, amount: 200 },
        { address: Keypair.generate().publicKey, amount: 300 },
    ];

    // Build transfer instructions for each recipient
    const COMPUTE_BUDGET = "ComputeBudget111111111111111111111111111111";
    const allTransferIxs = [];
    let hasComputeBudget = false;

    for (const { address, amount } of recipients) {
        const instructions = await createTransferInterfaceInstructions(
            rpc,
            payer.publicKey,
            mint,
            amount,
            payer.publicKey,
            address
        );
        
        for (const ix of instructions[instructions.length - 1]) {
            // Deduplicate ComputeBudget instructions
            if (ix.programId.toBase58() === COMPUTE_BUDGET) {
                if (hasComputeBudget) continue;
                hasComputeBudget = true;
            }
            allTransferIxs.push(ix);
        }
    }

    // Send all transfers in a single transaction
    const tx = new Transaction().add(...allTransferIxs);
    const sig = await sendAndConfirmTransaction(rpc, tx, [payer]);
    console.log("Batch tx:", sig);

    // Verify balances
    for (const { address, amount } of recipients) {
        const ata = getAssociatedTokenAddressInterface(mint, address);
        const { parsed } = await getAtaInterface(rpc, ata, address, mint);
        console.log(
            `  ${address.toBase58()}: ${parsed.amount} (expected ${amount})`
        );
    }
})();

Compare to SPL

import { findAssociatedTokenPda, TOKEN_2022_PROGRAM_ADDRESS } from "@solana-program/token";
import { getTransferInstruction } from "@solana-program/token";

const [senderAta] = await findAssociatedTokenPda({
  mint: mint.address,
  owner: sender.address,
  tokenProgram: TOKEN_2022_PROGRAM_ADDRESS
});

const [recipient1Ata] = await findAssociatedTokenPda({
  mint: mint.address,
  owner: recipient1.address,
  tokenProgram: TOKEN_2022_PROGRAM_ADDRESS
});

const [recipient2Ata] = await findAssociatedTokenPda({
  mint: mint.address,
  owner: recipient2.address,
  tokenProgram: TOKEN_2022_PROGRAM_ADDRESS
});

const transfer1Instruction = getTransferInstruction({
  source: senderAta,
  destination: recipient1Ata,
  authority: sender.address,
  amount: 250_000n
});

const transfer2Instruction = getTransferInstruction({
  source: senderAta,
  destination: recipient2Ata,
  authority: sender.address,
  amount: 250_000n
});

const signature = await client.transaction.prepareAndSend({
  authority: sender,
  instructions: [transfer1Instruction, transfer2Instruction],
  version: 0
});

const splToken = client.splToken({
  mint: mint.address,
  tokenProgram: "auto"
});

const senderBalance = await splToken.fetchBalance(sender.address);
const recipient1Balance = await splToken.fetchBalance(recipient1.address);
const recipient2Balance = await splToken.fetchBalance(recipient2.address);

Integrate light-token APIs for stablecoin payments

Open in Cursor

---
description: Integrate light-token APIs for stablecoin payments
allowed-tools: Bash, Read, Write, Edit, Glob, Grep, WebFetch, AskUserQuestion, Task, TaskCreate, TaskGet, TaskList, TaskUpdate, TaskOutput, mcp__deepwiki, mcp__zkcompression
---

## Integrate light-token APIs for stablecoin payments

Context:
- Guide: https://zkcompression.com/light-token/payments/overview
- Skills and resources index: https://zkcompression.com/skill.md
- SPL to Light reference: https://zkcompression.com/api-reference/solana-to-light-comparison
- Dedicated skill: https://github.com/Lightprotocol/skills/tree/main/skills/payments
- Packages: @lightprotocol/compressed-token, @lightprotocol/stateless.js
- Import from @lightprotocol/compressed-token/unified for all interface APIs

SPL → Light Token API mapping:
| Operation    | SPL                               | Light Token                              |
| Receive      | getOrCreateAssociatedTokenAccount() | createLoadAtaInstructions() / loadAta()  |
| Transfer     | createTransferInstruction()        | createTransferInterfaceInstructions()    |
| Delegated Transfer | transfer() (delegate signs)  | transferInterface(..., ownerPubkey, delegateSigner, ...) |
| Get Balance  | getAccount()                      | getAtaInterface()                        |
| Tx History   | getSignaturesForAddress()         | getSignaturesForOwnerInterface()         |
| Wrap SPL     | N/A                               | createWrapInstruction() / wrap()         |
| Unwrap       | N/A                               | createUnwrapInstructions() / unwrap()    |

### 1. Index project
- Grep `@solana/spl-token|@lightprotocol|createTransferInstruction|getAccount|Connection|Keypair|stablecoin|payment` across src/
- Glob `**/*.ts` and `**/*.tsx` for project structure
- Identify: RPC setup, existing token operations, payment flow, wallet signing pattern
- Check package.json for existing @lightprotocol/* or @solana/spl-token dependencies
- Task subagent (Grep/Read/WebFetch) if project has multiple packages to scan in parallel

### 2. Read references
- WebFetch the guide above — review Instruction and Action tabs for each operation
- WebFetch skill.md — check for a dedicated skill and resources matching this task
- TaskCreate one todo per phase below to track progress

### 3. Clarify intention
- AskUserQuestion: what is the goal? (new payment integration, migrate existing SPL payment flow, add alongside existing SPL)
- AskUserQuestion: which operations? (receive, send, balance, history, wrap, unwrap — or all)
- AskUserQuestion: instruction-level API (build your own transactions) or action-level API (high-level, fewer lines)?
- Summarize findings and wait for user confirmation before implementing

### 4. Create plan
- Based on steps 1–3, draft an implementation plan: which files to modify, what code to add, dependency changes
- Verify existing connection/signer setup is compatible (createRpc with ZK Compression endpoint)
- Key pattern: import from `@lightprotocol/compressed-token/unified` for all interface APIs
- If anything is unclear or ambiguous, loop back to step 3 (AskUserQuestion)
- Present the plan to the user for approval before proceeding

### 5. Implement
- Add deps if missing: Bash `npm install @lightprotocol/compressed-token @lightprotocol/stateless.js`
- Set up RPC: `createRpc(RPC_ENDPOINT)` with a ZK Compression endpoint (Helius, Triton)
- Import from `@lightprotocol/compressed-token/unified` for the interface APIs
- Follow the guide and the approved plan
- Write/Edit to create or modify files
- TaskUpdate to mark each step done

### 6. Verify
- Bash `tsc --noEmit`
- Bash run existing test suite if present
- TaskUpdate to mark complete

### Tools
- mcp__zkcompression__SearchLightProtocol("<query>") for API details
- mcp__deepwiki__ask_question("Lightprotocol/light-protocol", "<q>") for architecture
- Task subagent with Grep/Read/WebFetch for parallel lookups
- TaskList to check remaining work

### Resources

Guides:
- Basic payment: https://zkcompression.com/light-token/payments/basic-payment
- Batch payments: https://zkcompression.com/light-token/payments/batch-payments
- Payment with memo: https://zkcompression.com/light-token/payments/payment-with-memo
- Receive payments: https://zkcompression.com/light-token/payments/receive-payments
- Verify payments: https://zkcompression.com/light-token/payments/verify-payments
- Verify recipient address: https://zkcompression.com/light-token/payments/verify-recipient-address
- Spend permissions: https://zkcompression.com/light-token/payments/spend-permissions
- Wrap and unwrap: https://zkcompression.com/light-token/payments/wrap-unwrap
- Production readiness: https://zkcompression.com/light-token/payments/production-readiness
- FAQ: https://zkcompression.com/faq
- Sign with Privy: https://zkcompression.com/light-token/wallets/privy
- Sign with Wallet Adapter: https://zkcompression.com/light-token/wallets/wallet-adapter
- Gasless transactions: https://zkcompression.com/light-token/wallets/gasless-transactions

Examples:
- All payments: https://github.com/Lightprotocol/examples-light-token/tree/main/toolkits/payments
- Send (instruction): https://github.com/Lightprotocol/examples-light-token/blob/main/toolkits/payments/send/basic-send-instruction.ts
- Send (action): https://github.com/Lightprotocol/examples-light-token/blob/main/toolkits/payments/send/basic-send-action.ts
- Batch send: https://github.com/Lightprotocol/examples-light-token/blob/main/toolkits/payments/send/batch-send.ts
- Payment with memo: https://github.com/Lightprotocol/examples-light-token/blob/main/toolkits/payments/send/payment-with-memo.ts
- Receive: https://github.com/Lightprotocol/examples-light-token/blob/main/toolkits/payments/receive/receive.ts
- Get balance: https://github.com/Lightprotocol/examples-light-token/blob/main/toolkits/payments/verify/get-balance.ts
- Get history: https://github.com/Lightprotocol/examples-light-token/blob/main/toolkits/payments/verify/get-history.ts
- Verify address: https://github.com/Lightprotocol/examples-light-token/blob/main/toolkits/payments/verify/verify-address.ts
- Wrap: https://github.com/Lightprotocol/examples-light-token/blob/main/toolkits/payments/interop/wrap.ts
- Unwrap: https://github.com/Lightprotocol/examples-light-token/blob/main/toolkits/payments/interop/unwrap.ts
- Privy (Node.js): https://github.com/Lightprotocol/examples-light-token/tree/main/toolkits/sign-with-privy/nodejs
- Privy (React): https://github.com/Lightprotocol/examples-light-token/tree/main/toolkits/sign-with-privy/react
- Wallet Adapter (React): https://github.com/Lightprotocol/examples-light-token/tree/main/toolkits/sign-with-wallet-adapter/react
- Gasless transfer: https://github.com/Lightprotocol/examples-light-token/blob/main/toolkits/gasless-transactions/typescript/gasless-transfer.ts

Basic payment

Send a single transfer.

Gasless transactions

Separate the fee payer from the token owner.

Verify payments

Query balances and transaction history.

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Introduction

Light Token APIs

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For Other Use Cases

Learn

Resources

Setup

Send to Multiple Recipients in One Transaction

Basic payment

Gasless transactions

Verify payments

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