Pump Bundler Guide: Beat Snipers at Block 0#
Every new token launch on Solana faces the same threat: snipers. These automated bots monitor the mempool and buy your token the instant the pool creation transaction lands — often in the same block, milliseconds before regular traders.
Jump2Coin's Pump Bundler solves this using Jito bundles to launch your token AND buy with multiple wallets in one atomic transaction, all at block 0.
What is a Jito Bundle?#
Jito is a block engine for Solana that allows submitting bundles — groups of up to 5 transactions that land together or not at all. No partial execution, no reordering.
By bundling your pool creation with sniper wallet buy transactions, you guarantee that:
- The pool is created
- Your wallets buy at block 0 (the same block the pool is created in)
- No external bot can front-run your buys
The Bundle Structure#
The Pump Bundler creates up to 5 transactions:
| TX | Contents |
|---|---|
| TX0 | Token creation (mint + metadata) |
| TX1 | Pool creation + Jito tip |
| TX2–TX4 | Sniper wallet buys (1–3 wallets) |
All 5 land in the same Solana block. External snipers would need to submit their transactions before yours — impossible since your bundle is sealed.
How to Use the Bundler#
Step 1 — Configure Token#
Fill in the same fields as the regular token creator:
- Name, Symbol, Decimals, Supply
- Metadata URI (Arweave URL for your logo + description)
- Revoke Mint / Revoke Freeze options
Step 2 — Configure Pool#
- Initial SOL — How much SOL to seed the pool with (minimum 0.5 SOL recommended)
- Token % — Percent of supply going into the pool (e.g. 80%)
- Burn LP — Highly recommended. Burns LP in the same bundle.
Step 3 — Configure Sniper Wallets#
Choose 1–3 sniper wallets. For each wallet:
- A fresh keypair is generated in your browser (never leaves your device)
- You set a buy amount in SOL (e.g. 0.1 SOL)
- The wallet receives its funds from your main wallet just before launch
The tool shows an estimated token output for each wallet, accounting for the price impact of each sequential buy.
Step 4 — Fund Sniper Wallets#
The bundler calculates the exact SOL needed per sniper wallet:
- WSOL ATA rent (~0.002 SOL, recovered after swap)
- Token ATA rent (~0.002 SOL, permanent)
- Transaction fee (~0.00001 SOL)
- Buy amount
You sign one transaction to fund all wallets from your main wallet.
Step 5 — Launch#
You sign two transactions (token creation + pool creation). The sniper wallets sign their own buy transactions automatically — no extra Phantom popups.
The bundle is submitted to Jito's block engine and typically lands within 1–3 seconds.
Security: Your Keys, Your Tokens#
Sniper wallet keypairs are generated in your browser and exist only in browser memory. They are never sent to Jump2Coin servers. When you close the tab, they're gone.
This means:
- Jump2Coin cannot access your sniper wallets
- You should not reuse sniper wallets across sessions
- Export sniper wallet private keys if you want to recover unsold tokens later
After the Bundle Lands#
Once confirmed:
- Your token is live with a Raydium CPMM pool
- Your sniper wallets hold tokens bought at launch price
- You can check your dashboard to verify LP burn and pool stats
- Sniper wallet tokens can be sold from the wallets using their private keys in any compatible wallet
Frequently Asked Questions#
What is the maximum number of sniper wallets? 3. The 5-TX Jito bundle limit (2 fixed + 3 sniper buys) enforces this.
Does this work on devnet? No. Jito bundles only work on mainnet. The bundler is devnet-aware and will block bundle submission on devnet.
What if the bundle fails? Jito bundles are atomic — all-or-nothing. If the bundle fails, no tokens are created, no SOL is spent on the bundle (aside from Jito tip). You can retry.
Can I use my own metadata URI? Yes. If you already have an Arweave metadata URI, paste it in the configurator and the bundler skips the upload step.