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A bundle is a group of transactions packed together. Atomic means all-or-nothing: either every transaction in the group works, or none of them do. There’s no in-between. A “block” is one page in Ethereum’s record book, added every few seconds. An atomic bundle guarantees your whole launch lands on the same page, in the order you choose.

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Why “all or nothing” is a big deal

Launching the normal way, you send each step on its own: turn on trading, then wallet 1 buys, then wallet 2, and so on. Lots can go wrong:
  • A bot sees your “turn on trading” and buys before your wallets do.
  • Some of your buys happen later, at a worse price.
  • One buy fails, and that wallet gets left out.
An atomic bundle welds everything together, so none of that can happen:

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”In order” means exactly that

The steps run in the order you set. BundleZeus orders yours like this:
  1. Fund your buyer wallets
  2. Turn on trading
  3. Each wallet buys, one after another
  4. Pay the fee
Wallet #1 always gets a slightly better price than wallet #95 — that’s just how exchange pricing works (each buy nudges the price up). You can preview this with the AMM Profit Simulator.

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The trade-off: you have to get it right

All-or-nothing works both ways. If any required step would fail — say your contract blocks one of your buys — the whole bundle is thrown out and nothing happens. That’s why BundleZeus makes you do a test run first: it checks your exact launch against the live network and tells you if anything would break, before you spend a thing.
A cancelled bundle costs you nothing but a little time. A half-finished public launch can cost you the whole launch. Atomic is simply safer — as long as you test first.

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Where this works

  • Ethereum mainnet — true all-or-nothing bundles, using Flashbots
  • Practice networks (Sepolia, Hoodi, Sandbox) — all-or-nothing, and free to rehearse on
  • Coming soon — Base and BNB Chain will use burst mode (all transactions fire at once, not truly all-or-nothing); Robinhood Chain will be all-or-nothing like mainnet. See Supported Networks.

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Learn more

Flashbots & MEV

Where bundles come from, and why the public waiting room is dangerous.