Smart Contract
CryptoGlossary term
Definition
A self-executing program stored on a blockchain that automatically enforces the terms of an agreement when predetermined conditions are met. Smart contracts eliminate the need for intermediaries by running code that is transparent and cannot be altered once deployed. They are the foundation of DeFi applications, NFTs, and many other blockchain-based services.
Related terms
- EthereumA decentralized blockchain platform that enables developers to build and deploy smart contracts and decentralized applications (dApps). Unlike Bitcoin, which primarily serves as a digital currency, Ethereum provides a programmable platform powered by its native cryptocurrency, Ether (ETH). It transitioned from Proof of Work to Proof of Stake in 2022 to improve energy efficiency and scalability.
- DeFi (Decentralized Finance)A broad category of financial applications and services built on blockchain networks that operate without traditional intermediaries like banks or brokerages. DeFi platforms allow users to lend, borrow, trade, and earn interest on their crypto assets through smart contracts. This ecosystem aims to make financial services more accessible, transparent, and open to anyone with an internet connection.
- Gas FeeA transaction fee paid to validators or miners on a blockchain network to process and confirm transactions. On Ethereum, gas fees fluctuate based on network demand, meaning they can be very low during quiet periods and spike during times of high activity. Understanding gas fees is important because they directly affect the cost of sending crypto, swapping tokens, or interacting with smart contracts.
- Oracle (Blockchain)A service that provides real-world data to smart contracts on a blockchain, since blockchains cannot natively access information outside their network. Oracles supply data feeds like asset prices, weather conditions, sports scores, or other external information that smart contracts need to function properly. Chainlink is the most widely used oracle network in the DeFi ecosystem.
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