Create a Mint Account with Token Pool for Compression
Create an SPL token mint account with token pool for compression with createMint(), troubleshooting and advanced configurations.
The mint account itself requires rent (like regular SPL mints), but individual compressed token accounts are rent-free.
Compressed tokens use an SPL mint with token pool for compression. The token pool locks SPL tokens while compressed and releases them when decompressed.Create a token pool for an existing SPL mint with createTokenPool() or use createMint() to create a new one from scratch.
// Create SPL mint with token pool for compressionconst { mint, transactionSignature } = await createMint( rpc, payer, mintAuthority.publicKey, decimals,);
Best Practice: Each mint supports a maximum of 4 token pools total. During compression/decompression, token pools get write-locked. Use addTokenPools() to create additional pools that increase per-block write-lock capacity.
# Start a local test validatorlight test-validator## ensure you have the Solana CLI accessible in your system PATH
// createRpc() defaults to local test validator endpointsimport { Rpc, createRpc,} from "@lightprotocol/stateless.js";const connection: Rpc = createRpc();async function main() { let slot = await connection.getSlot(); console.log(slot); let health = await connection.getIndexerHealth(slot); console.log(health); // "Ok"}main();
Replace <your-api-key> with your actual API key. Get your API key here, if you don’t have one yet.
import { createRpc } from "@lightprotocol/stateless.js";// Helius exposes Solana and Photon RPC endpoints through a single URLconst RPC_ENDPOINT = "https://devnet.helius-rpc.com?api-key=<your_api_key>";const connection = createRpc(RPC_ENDPOINT, RPC_ENDPOINT, RPC_ENDPOINT);console.log("Connection created!");console.log("RPC Endpoint:", RPC_ENDPOINT);
Run this script to create a mint account with token pool for compression.
create-mint.ts
// 1. Setup funded payer and connect to local validator// 2. Create SPL mint with token pool for compression via createMint()import { Keypair } from '@solana/web3.js';import { createRpc } from '@lightprotocol/stateless.js';import { createMint } from '@lightprotocol/compressed-token';async function createCompressedMint() { // Step 1: Setup funded payer and connect to local validator const rpc = createRpc(); // defaults to localhost:8899 const payer = Keypair.generate(); const airdropSignature = await rpc.requestAirdrop(payer.publicKey, 1000000000); // 1 SOL await rpc.confirmTransaction(airdropSignature); // Step 2: Call createMint() to create mint account and token pool for compression const { mint, transactionSignature } = await createMint( rpc, payer, payer.publicKey, // mint authority 9 ); console.log("SPL mint with token pool for compression created"); console.log("Mint address:", mint.toBase58()); console.log("Transaction:", transactionSignature); return { mint, transactionSignature };}createCompressedMint().catch(console.error);
