All terms
All termsAddressBlockBlock timeBlockchainConfirmationGasGweiHashMempoolNodePrivate keyPublic keySeed phraseTransactionWalletAll time high (ATH)Bear marketBull marketCandlestickCapitulationChart patternsDollar cost averaging (DCA)Funding rateLeverageLimit orderLiquidationLiquidityMarket capMarket orderOrder bookPosition sizingRisk managementSlippageSpreadSupport and resistanceTrendVolatilityVolumeWhaleAMMBridgeCEXDAODeFiDepegDEXFlash loanGovernance tokenImpermanent lossLiquidity poolLP tokenOraclePerpetual (perp)RestakingRWAStablecoinTVLWrapped tokenYield farmingAirdropAlphaApe inBagholderDegenDiamond handsFloor priceFOMOFUDGMHODLMaxiMeme coinMoonNFTNGMINormiePaper handsPFPRektShillSnapshotWAGMIAddress poisoningCold storageCustodyDue diligence (DYOR)Dusting attackExit scamFront runningHardware walletHoneypotHot walletMEVMultisigPhishingPump and dumpRug pullSandwich attackSelf custodySIM swapToken approvalTwo factor authenticationWallet drainerWash tradingAccount abstractionAppchainBlock explorerCirculating and total supplyConsensusData availabilityEVMFaucetFinalityForkFully diluted valuation (FDV)Gas warHalvingLayer 1Layer 2Layer 3MainnetMiningName serviceOptimistic rollupProof of stakeProof of workRollupShardingSidechainSlashingSmart contractStakingTestnetToken standardTokenomicsValidatorZero knowledge proofZK rollupArweave and the permawebComposabilityCross chain messagingdAppDecentralized identity (DID)DePINGameFi and play to earnIndexerInteroperabilityIPFSOnchain and offchainSession keysSmart accountSocialFiSoulbound tokenSybil resistanceToken gatingWeb2 vs Web3Web3
Definition
Acting on knowledge of a pending transaction before it executes.
Because pending transactions are public, bots can see a large order coming and position ahead of it. This is illegal in traditional markets and structurally unavoidable in a public mempool.
Mitigations exist: private relays, batch auctions, encrypted mempools and order flow auctions all reduce the exposure.
In practice
CoW Swap batches orders and settles them together specifically to remove this attack surface.
Where to go next
MEVValue extracted by reordering, inserting or censoring transactions in a block.Sandwich attackA bot buys before your swap and sells after it, taking the difference.MempoolThe waiting room where broadcast transactions sit before being included in a block.
More security terms
Address poisoningCold storageCustodyDue diligence (DYOR)Dusting attackExit scamHardware walletHoneypotHot walletMEVMultisigPhishing
Want this explained out loud?
Some of these land faster in conversation than in writing. Sessions are one to one and you can ask anything, including the things that feel too obvious to ask.