What is Block 0 Buy on Solana? Why It Matters for Token Launches

Block 0 is the first block after your token is created. Buying in block 0 means your transactions land in the same block as the create transaction — the absolute earliest possible moment. It's the difference between buying at $0.000001 and buying at $0.00001.

How Solana Blocks Work

Solana produces approximately 2 blocks per second. Each block contains hundreds of transactions. When you launch a token, the create transaction lands in a specific block. Block 0 buyers are in that same block — before anyone else even knows the token exists.

Why Block 0 Matters

On Pump.fun's bonding curve, earlier buyers get lower prices. A block 0 buy at token creation might cost 0.5 SOL for 5% of supply. A block 1 buy (0.5 seconds later) might cost 0.5 SOL for 2% of supply after snipers have already moved the price.

How to Achieve Block 0

The only reliable way to buy in block 0 is via Jito bundles. A Jito bundle atomically links your create transaction with buy transactions — they either all land in the same block or none do. This guarantees block 0 execution.

Block 0 vs Snipe Wallets

Bundle wallets buy in block 0 (same block as create). Snipe wallets buy in block 1-2 (immediately after). Both strategies are useful — bundles for guaranteed early entry, snipers for additional supply capture at slightly higher prices.