RiskMemecoins are highly speculative, and most lose nearly all their value. Nothing here is financial advice. The risks in full
What a bundle launch is
A bundle launch creates a coin and buys it from several of your own wallets in the same block, before anyone else can trade. A tool that does this is called a bundler.
- On Solana, a bundle is a group of transactions sent to land together, in order: all of them or none.
- The coin's creation goes first, then your wallets' buys.
- Nobody can get a buy in between them, because the coin doesn't exist until the bundle lands.
A bundle isn't private. Every buy is on the chain, and bundle checkers flag coins where several wallets bought in the first block. More on that below.
Normal, Block 0 and Dragon
memetools has three launch modes. Normal buys from the launch wallet alone, Block 0 lands every wallet in the coin's block, and Dragon lands a few there and the rest right after.
| Mode | Who buys | How it lands |
|---|---|---|
| Normal | The launch wallet only | One transaction, with the coin |
| Block 0 | Up to 12 bundle wallets | One bundle in the coin's block: all or none |
| Dragon | Up to 3 in the coin's block, up to 20 in all | A small bundle, then the rest the moment the coin is live |
Which to pick
- Block 0 when every wallet must get in at the starting price. If the bundle doesn't land, nothing happens and nothing is spent on buys.
- Dragon when you want more than 12 wallets. Its later buys go out one by one just after launch, so one can miss if the price has moved. Retry sends the ones that missed.
- Normal when one wallet is enough.
Setting one up
Bundles are in the Advanced layout. You make the wallets, fund them, tick the ones that buy, and approve once.
- In Wallets, open the Bundle tab. Make or import up to 20 wallets, and save the backup file.
- Press Fund to send them SOL from your funder wallet. Each needs its buy plus about 0.005 SOL.
- In Launch, fill in the coin and pick pump.fun.
- In the bundle card, tick the wallets and set how much each one buys.
- Pick the mode and the tip, review the launch, and approve. Your wallets must be unlocked, because bundle wallets sign in your browser.
The review names any wallet that's short before anything is sent. Launching itself is covered in Launch a memecoin on pump.fun, bundlers in general in Solana bundler, and how seven of them differ in Solana bundlers compared.
What a bundle costs
On top of a normal launch, a bundle pays a tip to land together, and each wallet pays for its own buy.
The 0.005 SOL covers the accounts a wallet opens the first time it holds a coin, and the minimum Solana makes a wallet keep. Every fee is in pump.fun fees, and the bundle cost calculator adds up a launch of your own.
What everyone else can see
Anyone can see that a coin was bundled. The buys sit in the coin's first block, and wallets funded from one wallet are linked to it on the chain.
- Bundle checkers and trading terminals show how much of a coin was bought in its first block, and mark those wallets.
- Funding is public. memetools sends SOL from your funder straight to your bundle wallets, in one transaction. It doesn't route funds through exchanges or mixers to make wallets look unrelated.
- Buyers read this. Many avoid coins where a large share is held by the launcher's wallets, since those wallets can sell at any time.
Treat your bundle wallets as yours in everything you say about the coin. Passing your own buys off as outside demand misleads buyers.
After the launch
The coin's panel shows every wallet's position, and you can trade from all of them together.
- Sell all sells from your wallets together in one bundle: up to 21 wallets, the launch wallet and 20 bundle wallets.
- Quick buttons buy or sell from one wallet in a press.
- Sweep, in the Bundle tab, sends the wallets' SOL back to your funder. Coins stay where they are.
Risks
A bundle multiplies what you put into a coin that may go to zero. memetools gives no advice on whether to launch or buy one.
- Memecoins are highly speculative, and most lose nearly all their value.
- A later Dragon buy can fail or land at a worse price than the first block's.
- Each bundle wallet is a real wallet with its own key. Keep the backup file and its password: nobody can restore them for you.
- Rules on token launches differ by country. Following them is up to you.