Glossary
IN SHORT
Plain definitions for the vocabulary around token launches, bundling and snipers. Each entry stands on its own — no prior term required. Start with token-launch bundler, atomic transaction and mempool if you are new to the subject.
A–Z
Atomic transaction · Block zero · Bonding curve · Bundle · Front-running · Graduation · Honeypot · Locked liquidity · Mempool · MEV (maximal extractable value) · Multicall · Restriction window · Sandwich attack · Sequencer · Slippage · Sniper bot · Token-launch bundler
Atomic transaction
A transaction that either completes entirely or has no effect at all. If any step inside it fails, the EVM reverts every state change the transaction made. This is what makes a bundled buy all-or-nothing rather than partially filled.
Block zero
Informal name for the first block in which a newly launched token can be traded. Whoever buys in block zero pays the opening price, which is why launch tooling and sniper bots both concentrate on it.
Bonding curve
A pricing mechanism where a token's price is set by a formula against how much has been bought so far, rather than by a liquidity pool. Some launchpads start tokens on a curve and later graduate them into a normal AMM pool.
Bundle
A group of transactions treated as one unit for execution: they all land together in the same block or none of them do. On Ethereum a bundle is handed to a block builder; on chains without a relay the same effect is achieved by putting everything inside a single transaction.
Front-running
Observing a pending transaction and getting your own transaction ordered ahead of it to profit from the price move it will cause. It requires visibility into transactions before they execute, which is why it is a mempool phenomenon.
Graduation
The point at which a token on a launchpad crosses a configured threshold of paired liquidity. Depending on the launchpad this may migrate liquidity into a new pool, or may simply be a status label while trading continues in the same pool.
Honeypot
A token that can be bought but not sold, usually via hidden transfer restrictions in the contract. Scanners detect the pattern by simulating a sell before you commit real funds to a buy.
Locked liquidity
A liquidity position held by a contract that prevents the creator from withdrawing it, removing the ability to pull the pool out from under holders. Fees earned by the position can usually still be claimed by the creator.
Mempool
The pool of transactions that have been broadcast but not yet included in a block. On Ethereum it is public and gossiped between nodes. Chains with a centralised sequencer, including Arbitrum Orbit L2s such as Robinhood Chain, have no public mempool.
MEV (maximal extractable value)
Value that can be captured by choosing the order, inclusion or exclusion of transactions within a block. Sniping a launch and sandwiching a swap are both forms of MEV extraction.
Multicall
A contract function that executes several encoded calls inside one transaction. A Uniswap SwapRouter02 multicall can perform many swaps paying out to many different wallets at once, atomically — the basis for bundling on chains with no relay.
Restriction window
A period immediately after launch during which a launchpad caps per-wallet and per-transaction buy sizes, and may reserve the launch block for the creator. It limits how much supply any single actor can take at the opening price.
Sandwich attack
Placing one transaction immediately before a victim's trade and another immediately after it, profiting from the price movement the victim causes. Requires the ability to see and order around a pending transaction.
Sequencer
The component of a layer-2 network that decides transaction ordering and produces blocks. Because it receives transactions directly rather than through a public gossip network, there is no public mempool to observe.
Slippage
The difference between the expected price of a trade and the price actually paid, caused by the price moving between submission and execution. Swap calls set a minimum acceptable output to bound it.
Sniper bot
Automated software that buys a token in the first moments it becomes tradable, aiming to acquire supply at the opening price and sell into the demand that follows. Some watch the mempool; others watch confirmed blocks or a sequencer feed.
Token-launch bundler
A tool that makes the transactions around a token launch execute as one indivisible unit, so no other trader can act between a token going live and the creator's own buys landing.
Put the vocabulary to work
The concepts above come together in how to launch a token on Robinhood Chain and anti-snipe protection.