A protocol penalty that removes stake for specified, provable validator misconduct.
Before moving a validator to another server, you shut down the old instance so both machines won’t sign conflicting messages with the same keys.
The difference between an expected execution result and the result actually obtained.
"The quote was 100 tokens, but the swap returned 98 after the pool's conditions changed."
The maximum unfavorable difference from a quoted trade that a user agrees to accept.
You leave a 1% tolerance on a swap, and it reverts after conditions move beyond that limit instead of completing at the worse price.
A scheduled time interval in which a proof-of-stake network may produce a block.
An account with programmable rules for authorizing and carrying out actions.
Your account requires two signers for a large transfer, while allowing a limited session permission for routine actions in a game.
A program on a blockchain that executes defined rules when it is invoked.
You approve a lending transaction, and the contract checks its rules before recording your deposit and issuing the corresponding position.
A scoped security review of smart-contract code and the assumptions around it.
"The report covers version one. The app now uses an upgraded contract, so I'm checking what the review actually included."
A wallet design in which designated guardians help restore or change account access.
"I lost my signing device. My guardians can authorize a replacement key under the wallet's recovery rules."
A rule change that narrows what is valid while remaining compatible with the older rules.
A programming language commonly used to write smart contracts that compile to EVM bytecode.
A developer writes a Solidity balance mapping, then tests what happens when someone tries to withdraw more than their recorded balance.