> ## Documentation Index
> Fetch the complete documentation index at: https://docs.raydium.io/llms.txt
> Use this file to discover all available pages before exploring further.

# LaunchLab code demos

> End-to-end TypeScript: create a LaunchLab launch, buy and sell on the bonding curve, graduate into a CPMM pool, and collect creator fees.

<Info>
  **Version banner.**

  * SDK: `@raydium-io/raydium-sdk-v2@0.2.42-alpha`
  * Cluster: Solana `mainnet-beta`
  * Program ID: see [`reference/program-addresses`](/reference/program-addresses)
  * Last verified: 2026-04

  Pin the SDK version in your `package.json`. The bonding-curve interface has evolved between minor releases.
</Info>

## Setup

Demos here mirror files in [`raydium-sdk-V2-demo/src/launchpad`](https://github.com/raydium-io/raydium-sdk-V2-demo/tree/master/src/launchpad). Bootstrap follows the demo repo's [`config.ts.template`](https://github.com/raydium-io/raydium-sdk-V2-demo/blob/master/src/config.ts.template):

```ts theme={null}
import { Connection, Keypair, clusterApiUrl, PublicKey } from "@solana/web3.js";
import { Raydium, TxVersion } from "@raydium-io/raydium-sdk-v2";
import BN from "bn.js";
import fs from "node:fs";

const connection = new Connection(process.env.RPC_URL ?? clusterApiUrl("mainnet-beta"));
const owner = Keypair.fromSecretKey(
  new Uint8Array(JSON.parse(fs.readFileSync(process.env.KEYPAIR!, "utf8"))),
);
const raydium = await Raydium.load({
  owner,
  connection,
  cluster: "mainnet",
  disableFeatureCheck: true,
  blockhashCommitment: "finalized",
});
export const txVersion = TxVersion.V0;
```

## Create a launch

Source: [`src/launchpad/createMint.ts`](https://github.com/raydium-io/raydium-sdk-V2-demo/blob/master/src/launchpad/createMint.ts) (and [`createBonkMintApi.ts`](https://github.com/raydium-io/raydium-sdk-V2-demo/blob/master/src/launchpad/createBonkMintApi.ts) for the API-driven Bonk variant)

```ts theme={null}
import { NATIVE_MINT } from "@solana/spl-token";

const { execute, extInfo } = await raydium.launchpad.createLaunchpad({
  programId: /* LaunchLab program ID from reference/program-addresses */,
  // Token metadata for the new base mint:
  name:   "Example Token",
  symbol: "EXMPL",
  uri:    "https://example.com/metadata.json",
  decimals: 6,

  // Curve params:
  curveType: 0,                                      // 0 = quadratic
  supply:    new BN(1_000_000_000).mul(new BN(10).pow(new BN(6))), // 1B base (6 dec)
  graduationFractionBps: 8000,                       // 80% → graduation
  initialK:  new BN("40"),                           // curve shape parameter

  // Quote side:
  quoteMint: NATIVE_MINT,                            // WSOL
  openTime:  new BN(Math.floor(Date.now() / 1000) + 60),  // opens in 1min

  // Fee policy:
  fees: {
    buyNumerator:   new BN(100),                     // 1.00%
    buyDenominator: new BN(10_000),
    sellNumerator:  new BN(100),
    sellDenominator: new BN(10_000),
    lpShare:         new BN(60),
    creatorShare:    new BN(20),
    protocolShare:   new BN(20),
    totalShare:      new BN(100),
  },

  postGraduationLpPolicy: "burn",                    // "burn" | "lock" | "toCreator"

  txVersion: TxVersion.V0,
});

const { txId } = await execute({ sendAndConfirm: true });
console.log("Launch:", extInfo.launchState.toBase58());
console.log("Base mint:", extInfo.baseMint.toBase58());
console.log("Create tx:", txId);
```

Notes:

* `initialK` is the scale factor for the quadratic curve. Tune it to target a specific opening CPMM price at graduation. See [`products/launchlab/bonding-curve`](/products/launchlab/bonding-curve) for the derivation.
* The SDK handles creating the base mint, the metadata PDA, and both vaults in a single transaction. It may exceed 1232 bytes if the metadata URI is long; in that case the SDK splits into two transactions.
* After `Initialize`, the launch is not tradable until `openTime`. Set `openTime` a minute or two ahead to give front-runners less chance to grab the first buy.

## Fetch launch state

```ts theme={null}
const launchId = new PublicKey("<LAUNCH_STATE>");

const launch = await raydium.launchpad.getLaunchById({ launchId });
console.log("Status:", ["Active","Graduated","Cancelled"][launch.status]);
console.log("Base sold:", launch.baseSold.toString(),
            "/", launch.baseSupplyMax.toString());
console.log("Quote collected:", launch.quoteReserveReal.toString(),
            "target:", launch.quoteReserveTarget.toString());
if (launch.status === 1) {
  console.log("Post-graduation CPMM pool:", launch.cpmmPoolState.toBase58());
}
```

`getLaunchById` returns the decoded `LaunchState` plus the computed "progress toward graduation" fraction as a `Decimal`.

## Buy — exact quote in

Source: [`src/launchpad/buy.ts`](https://github.com/raydium-io/raydium-sdk-V2-demo/blob/master/src/launchpad/buy.ts)

```ts theme={null}
const quoteIn        = new BN(1).mul(new BN(10).pow(new BN(9)));  // 1 SOL
const minimumBaseOut = new BN(0);  // accept any; tighten for production

// Preview the quote off-chain so your UI can show expected base_out:
const preview = raydium.launchpad.computeBuyBase({
  launchState: launch,
  quoteIn,
});
console.log("Expected base_out:", preview.baseOut.toString(),
            "price impact:", preview.priceImpact.toString());

const { execute } = await raydium.launchpad.buyExactIn({
  launchInfo: launch,
  quoteIn,
  minimumBaseOut,
  txVersion: TxVersion.V0,
});

const { txId } = await execute({ sendAndConfirm: true });
console.log("Buy tx:", txId);
```

`computeBuyBase` mirrors the on-chain Newton solver (quadratic curve) or the closed-form CPMM-inverse (curve\_type 1). Use it to populate the "You receive" UI field.

## Buy — exact base out

```ts theme={null}
const baseOut         = new BN(1_000_000).mul(new BN(10).pow(new BN(6)));  // 1M base
const maximumQuoteIn  = new BN(2).mul(new BN(10).pow(new BN(9)));          // cap at 2 SOL

const { execute } = await raydium.launchpad.buyExactOut({
  launchInfo: launch,
  baseOut,
  maximumQuoteIn,
  txVersion: TxVersion.V0,
});

await execute({ sendAndConfirm: true });
```

Useful for "buy exactly X tokens" UIs. Rejects with `ExceededSlippage` if the curve has moved enough that the quote requirement now exceeds `maximumQuoteIn`.

## Sell

Source: [`src/launchpad/sell.ts`](https://github.com/raydium-io/raydium-sdk-V2-demo/blob/master/src/launchpad/sell.ts)

```ts theme={null}
const baseIn           = new BN(500_000).mul(new BN(10).pow(new BN(6)));  // 0.5M base
const minimumQuoteOut  = new BN(0);

const { execute } = await raydium.launchpad.sellExactIn({
  launchInfo: launch,
  baseIn,
  minimumQuoteOut,
  txVersion: TxVersion.V0,
});

await execute({ sendAndConfirm: true });
```

The curve's sell path is symmetric to the buy path: reducing `base_sold` by `baseIn` returns `quote_out` equal to the integrated area under the curve between `base_sold − baseIn` and `base_sold`, minus the sell fee.

## Auto-graduate on the threshold-crossing buy

The SDK chains a `Graduate` instruction inside the `buy*` transaction when it detects the post-buy state will cross the threshold:

```ts theme={null}
const { execute, willGraduate } = await raydium.launchpad.buyExactIn({
  launchInfo: launch,
  quoteIn: new BN(100).mul(new BN(10).pow(new BN(9))),    // large buy
  minimumBaseOut: new BN(0),
  txVersion: TxVersion.V0,
  autoGraduate: true,                                      // default
});

if (willGraduate) {
  console.log("This buy will trigger graduation.");
}

const { txId } = await execute({ sendAndConfirm: true });
```

Because `Graduate` is permissionless, anyone (including an MEV bot) can race to land the first `Graduate` after the threshold is crossed — typically seconds later, not minutes. The first-lander just pays the rent for the CPMM pool accounts; they get no other benefit.

## Manual `Graduate`

If `autoGraduate` was off or the threshold-crossing transaction failed, you can fire the graduation separately:

```ts theme={null}
const { execute } = await raydium.launchpad.graduate({
  launchInfo: launch,
  txVersion: TxVersion.V0,
});

await execute({ sendAndConfirm: true });
```

Reverts with `NotAtThreshold` if `quote_reserve_real < quote_reserve_target` at submission time. Retry-safe — a second `Graduate` attempt after success reverts with `NotActive`.

## Collect creator fees

Source: [`src/launchpad/claimCreatorFee.ts`](https://github.com/raydium-io/raydium-sdk-V2-demo/blob/master/src/launchpad/claimCreatorFee.ts) (single mint) and [`collectAllCreatorFees.ts`](https://github.com/raydium-io/raydium-sdk-V2-demo/blob/master/src/launchpad/collectAllCreatorFees.ts) (batched)

```ts theme={null}
const { execute } = await raydium.launchpad.collectCreatorFees({
  launchInfo: launch,
  txVersion: TxVersion.V0,
});

await execute({ sendAndConfirm: true });
```

Transfers the accrued creator-fee-counter quote amount to the creator's ATA on the quote mint. Callable pre- or post-graduation; use it periodically rather than waiting for a huge balance to accumulate.

## Track a launch through its lifecycle

Putting it together, a monitoring script might look like:

```ts theme={null}
async function watch(launchId: PublicKey) {
  while (true) {
    const launch = await raydium.launchpad.getLaunchById({ launchId });
    const progress =
      Number(launch.quoteReserveReal) /
      Number(launch.quoteReserveTarget);

    console.log(
      `status=${["Active","Graduated","Cancelled"][launch.status]}`,
      `progress=${(progress * 100).toFixed(2)}%`,
      `num_buys=${launch.stateData.numBuys}`,
    );

    if (launch.status === 1) {
      console.log("Graduated to CPMM pool:", launch.cpmmPoolState.toBase58());
      break;
    }
    await new Promise(r => setTimeout(r, 10_000));
  }
}
```

## Rust CPI

Calling LaunchLab from your own Anchor program is rare (most launch integrations are TS-side only). If you do, the program ships an Anchor crate `raydium_launchlab` with `cpi::accounts::Buy`, `cpi::accounts::Sell`, etc. — pattern mirrors the CPMM / CLMM CPI examples. See [`sdk-api/rust-cpi`](/sdk-api/rust-cpi) for a generalized template once this site is populated.

## Pitfalls

* **Fee-split arithmetic off-by-one.** If `total_share` is not exactly `lp_share + creator_share + protocol_share`, `Initialize` reverts with `InvalidFeeShares`. Set `totalShare` equal to the sum.
* **Using a non-allowed quote mint.** `launch_config.allowed_quote_mints` is a fixed list; passing any other mint reverts. Check with `raydium.launchpad.getConfig()` first.
* **Metadata size.** Long `uri` strings push the Metaplex CPI over the budget. Keep `uri` under \~200 chars — most CDN-hosted JSON metadata fits easily.
* **Graduation race.** Automated bots monitor `quote_reserve_real` and front-run `Graduate` within a slot or two of the threshold crossing. This is benign — it only costs them rent — but it means your UI should treat `status` transitions as fast events.

## Where to go next

* [`products/launchlab/bonding-curve`](/products/launchlab/bonding-curve) — curve math.
* [`products/cpmm/code-demos`](/products/cpmm/code-demos) — what to do with the resulting pool.
* [`user-flows/launch-token-launchlab`](/user-flows/launch-token-launchlab) — the end-to-end launch-a-token guide, including off-chain steps.

Sources:

* [Raydium SDK v2](https://github.com/raydium-io/raydium-sdk-V2)
* Raydium LaunchLab program source