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A smart contract is self-executing code deployed on a blockchain that enforces an agreement automatically when predefined conditions are met, without an intermediary.
A smart contract is a program stored on a blockchain that runs exactly as written when triggered. The code defines rules and penalties around an agreement, automatically enforces the obligations, and — because it lives on a tamper-resistant distributed ledger — does so without a broker, escrow agent, or court.
Ethereum popularized smart contracts with a Turing-complete virtual machine (the EVM), enabling DeFi, NFTs, DAOs, and most of what we now call Web3. Today, every major programmable chain (Solana, Avalanche, BNB Chain, and the EVM L2s) hosts its own smart-contract ecosystem. When you swap on Uniswap, borrow on Aave, or mint an NFT, you are calling a smart contract.
The same property that makes smart contracts powerful — immutability — also makes them dangerous. A bug in a deployed contract cannot be patched the way traditional software can; the code executes exactly as written, including the flaws. This is why audits, formal verification, and battle-tested libraries matter, and why smart-contract exploits remain the leading cause of large crypto losses.
A smart contract is a program deployed on a blockchain that automatically executes the terms of an agreement when predefined conditions are met, without needing a middleman. The code, not a person, enforces the rules.
It depends on jurisdiction. Smart contracts are self-enforcing in code, but whether they count as legally enforceable agreements varies by country and use case. In practice, on-chain outcomes (funds moving per the code) happen regardless of legal status.
Yes. A smart contract does only what its code says, including any flaws. If an attacker finds a logic bug, they can often drain the contract's funds before anyone can respond. This is why audits, bug bounties, formal verification, and using well-tested code libraries are essential.
A gas fee is the charge users pay to have a transaction processed on a blockchain network, denominated in the network's native token and varying with demand.
A liquidity pool is a smart-contract vault of paired tokens that decentralized exchanges use to enable automated, peer-to-contract trading without an order book.
Staking is the act of locking up cryptocurrency to help secure a proof-of-stake network in exchange for periodic rewards, analogous to earning interest.
A DAO is an organization governed by smart contracts and token-holder votes on a blockchain, with no central management and rules encoded directly in code.
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