Jito bundle
A Jito bundle is a group of up to 5 Solana transactions that land in the same block, in order, or not at all.
How it works
Jito runs a block engine that most Solana validators accept bundles from. A bundle is sent with a tip to one of Jito’s tip accounts. The validator runs its transactions one after another, and if one fails, none land.
- At most 5 transactions per bundle.
- All or nothing: a failed transaction drops the whole bundle.
- The tip is paid only if the bundle lands.
Why launches use it
A coin launch on pump fun is a create transaction and buys. Sent separately, bots can buy between them. In one bundle, the create and the buys land together in the launch block.
Worked example
5 transactions: the create, the dev buy, and 3 more with 2 team buys each. That is 6 team buys in the launch block. Unison budgets about 0.001 SOL for the tip. Jito’s public tip floor moves all day; on 12 Nov 2026 at 11:39 UTC its median was 0.00001 SOL and its 95th percentile 0.0071 SOL.
Sources
- Jito docs, low-latency transaction send, read 12 Nov 2026.
- Jito tip floor API, read 12 Nov 2026 11:39 UTC.
Related
- Launch block: The launch block is the block a coin is created in, and the only block where buys can land before anyone else has seen the coin.
- Bundled coin: A bundled coin is one whose creator bought it from several of their own wallets at launch, usually in the same block or transaction as the create.
- Token account rent: Token account rent is the SOL a Solana wallet must lock to hold a token, about 0.00204 SOL per account, returned when the account is closed.
Updated 12 Nov 2026. Source: Unison (unisongo.com). Launching a coin can lose money.