With the advancement of IT technologies and blockchain platforms, a new type of contract has emerged: smart contracts.
In this article, we explore smart contracts and how they are used today.
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What are smart contracts. Smart contracts explained
What is a smart contract? It’s like a digital agreement that runs on its own, with all terms written directly into the code. It works on a blockchain network, which automatically executes and enforces the contract when the set conditions are met.
There is no need for intermediaries such as lawyers or banks because the rules of the contract are transparent and unchangeable once deployed. Essentially, smart contracts in cryptocurrency streamline and secure transactions, making them faster, more efficient, and less dependent on third-party oversight.
Historical background
The concept of smart contracts dates back to the mid-1990s, when computer scientist and cryptographer Nick Szabo first proposed the idea.
He envisioned a digital protocol that could automatically execute the terms of a contract when predefined conditions were met, similar to a vending machine that dispenses a snack when the correct amount of money is inserted.
But it wasn’t until blockchain technology emerged, especially with the launch of Ethereum in 2015, that smart contracts took off. Ethereum’s blockchain gave developers the tools to create and run code that could handle complex agreements on its own. This breakthrough led to a wave of new decentralized apps, shaking things up by automating transactions and eliminating the need for middlemen.
How do smart contracts work?
Smart contracts use simple “if/when…then…” statements written into the blockchain. They automatically perform tasks such as releasing funds, registering assets or sending notifications once conditions are met. The sustainability of the blockchain ensures that transactions are only visible to authorized parties.
Smart contracts can become quite complex, with different terms that everyone must agree on. This means deciding how transactions are recorded, handling any exceptions, and figuring out how to resolve disputes.
Each node in the network keeps a copy of all smart contracts, along with the blockchain and transaction data. When a contract receives money, all nodes execute the contract’s code to agree on the outcome, so everything runs smoothly without a central authority.
Not every blockchain can execute automated contracts, so it’s good to know which ones do and which don’t. While platforms like Ethereum, Arbitrum, Avalanche, Base, and BNB Chain do, others, like Bitcoin’s base blockchain, do not. The main difference is whether a blockchain can process and store complex logic. Once a smart contract is set up, it usually remains as is, even for those who created it. This stability helps it resist censorship and prevents it from being easily shut down.
Types of smart contracts
Smart contracts in blockchain generally fall into three types:
Smart legal contracts
Smart Legal contracts are designed to align with formal legal agreements, meaning that the parties involved are legally responsible for meeting the contract terms. These can range from contracts that facilitate cryptocurrency-to-fiat conversions to contracts that handle real estate registrations.
Many existing smart contracts are legal in nature and support various platforms, including cryptocurrency exchanges, DeFi projects, GameFi projects, and blockchain-based platforms such as NFT marketplaces and real estate tokenization platforms.
Decentralized autonomous organizations
DAOs are communities governed by a set of rules coded in smart contracts. Once these rules are established, DAOs use these contracts to enforce them, provide legal mechanisms for protection, and impose fines for violations. Essentially, DAO smart contracts function as the laws of the organization and the ‘digital’ bureaucracy.
Examples include governance protocols for Decentraland, Uniswap, Polkadot and MakerDAO. In these projects, the board is managed by holders of the native tokens, who can propose changes (such as adjusting fee structures, changing the blockchain code, or adding/removing parachains) and vote on them. DAO contracts take care of the voting process and count the votes.
Application logic contracts
ALCs operate under a governance program and are primarily charged with managing the interactions between this program and the blockchain. For example, ALCs can facilitate the integration of Internet of Things devices with blockchain.
Benefits of smart contracts
The benefits of using blockchain are impressive for individuals, businesses and governments.
Transparency: One of the biggest advantages is transparency. Every transaction on a blockchain is public and can be verified. Once data has been added, it cannot be changed. This means you can trust that smart contracts are secure and have not been tampered with, giving you peace of mind whether you use them personally or for business.
Cost efficiency: Smart contracts take a lot of the legwork off your hands when it comes to setting up and managing agreements. Because they don’t need intermediaries such as lawyers, banks or real estate agents, they save money and streamline processes.
Building trust: Because smart contracts are automated, they reduce the chance of human error and build trust between parties.
Secure storage and backup: Losing data is a major risk for any organization. While backups are important, they are not always foolproof. However, blockchain technology stores data on many nodes, so it is much less likely to be lost or tampered with as long as the blockchain itself is active.
Security: Smart contracts are incredibly secure thanks to advanced encryption and security protocols. They are among the most secure transaction settlement tools today and offer strong protection against hacking and manipulation, just like cryptos.
Use cases
Cryptocurrency smart token contracts are used to create, manage and assign ownership of specific digital tokens on blockchain networks. These contracts program the functionalities of the tokens they issue, giving them different roles.
For example, they can enable tokens to serve as utility tokens for apps (that provide features or benefits within an application), governance tokens that give holders voting rights in a protocol, security tokens that represent shares in a company, or NFTs which owns unique physical or digital assets.
Examples of smart contracts
Examples of smart contracts in action:
Ethereum. Ethereum allows developers to build dapps and supports many DeFi projects. Smart contracts on Ethereum are super flexible and can handle everything from converting real assets into digital tokens to automating transactions. It is a hub for many pioneering blockchain activities.
Then there is Binance smart chain. It is praised for its speed and efficiency. Although it is compatible with Ethereum, it offers lower costs and better performance, making it an excellent choice for various projects. Due to these benefits, it has become a popular choice for DeFi projects and tokenization.
Polka dot. Polkadot is all about connecting different blockchains. It allows you to create parallel blockchains that can communicate with each other and support smart contracts for different applications, improving blockchain interoperability.
Chain link. Chainlink is like a bridge that connects smart contracts to the real world by providing them with external data. Thanks to the decentralized oracles, these contracts have access to real-time information, making them even more dynamic and adaptable.
Future of smart contracts
The future of smart contracts is bright and full of potential. As technology continues to evolve, these contracts will become smarter, more secure and more efficient. This is thanks to continuous upgrades to blockchain technology and better programming tools.
We’re likely to see these technology contracts revolutionize industries beyond finance and legal, impacting areas such as supply chain management and government operations. All in all, smart contracts are preparing to become a major force in shaping the future of our digital world.