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Self-executing code that runs on blockchain networks
Programmable Agreements
Smart contracts are programs stored on a blockchain that automatically execute when predetermined conditions are met. They enable trustless agreements without intermediaries—from financial transactions to complex multi-party protocols. Once deployed, they're immutable and transparent, running exactly as programmed.
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Ethereum smart contract language
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Blockchain runtime
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Decentralized finance
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Transaction costs
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Contract verification
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External data feeds
Smart contracts power decentralized finance (DeFi)—a parallel financial system without banks or brokers. Protocols for lending, borrowing, trading, and earning yield run autonomously on blockchains like Ethereum. While this creates new opportunities, smart contract bugs can lead to exploits—making security audits essential.
Learn Solidity and build decentralized applications on Ethereum.