A Beginner’s Guide to Smart Contracts
Smart contracts are programmatic protocols deployed on certain blockchains. When called, they check conditions and execute operations according to predefined rules. Code vulnerabilities, dependence on external data, and upgrade difficulties continue to pose risks.
What Are Smart Contracts?
A smart contract writes the conditions and execution rules of a protocol directly into code and deploys them to a blockchain network. When the contract is called, the code checks the conditions and executes operations according to predefined rules, thereby reducing the need for manual execution or intermediaries to carry out each step. The concept was proposed by Nick Szabo in 1994 year and later attracted widespread attention with platforms such as Ethereum.
How They Work and Their Uses
Developers first write the rules and conditions, then deploy the contract to a blockchain. After the contract is called, the relevant transaction is validated by network consensus and written on-chain as a tamper-resistant record, ultimately receiving confirmation. Its uses extend beyond financial transactions to include decentralized applications, insurance, supply management, intellectual property management, and voting systems.
Key Advantages
Smart contracts can run automatically when conditions are met, reducing manual processing time and operational errors. On-chain records are generally convenient for relevant participants to verify, helping improve transparency; eliminating some intermediary steps may also reduce execution costs. Blockchain record-keeping can make tampering more difficult, but this does not mean that contracts are inherently free of security risks.
Risks and Mitigations
Smart contracts may depend on external data and also face code vulnerabilities and network scalability issues. Code deployed on-chain is generally difficult to modify, so fixing errors and updating requirements may be more complex. Common measures include pre-launch audits, bug bounties, collaborative development, and establishing standards to improve interoperability and compatibility across different blockchain platforms.
Original Tutorial
https://www.binance.com/zh-CN/academy/glossary/smart-contract
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