A smart contract is a self-executing digital agreement stored on a blockchain that automatically carries out actions when predefined conditions are met. It removes the need for intermediaries by enforcing rules through code.
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A smart contract automatically executes agreements based on predefined conditions.
Smart contracts are programmed with specific rules and run on blockchain networks like Ethereum. Once deployed, they operate exactly as coded and cannot be easily changed, which ensures transparency and reliability. They are commonly used for applications such as decentralized finance, token issuance, insurance payouts, and digital ownership. Because they execute automatically, they reduce the need for trust between parties and eliminate delays caused by manual processing. However, errors in the code can lead to unintended outcomes, and once deployed, fixing these issues can be difficult or even impossible.
Short example:
Suppose you create a smart contract that releases payment once a service is completed.
When the agreed condition is met, the contract automatically sends the funds to the service provider.
No bank or third party is needed, and the transaction happens instantly and securely.
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