What Is Smart Contract on Blockchain: A Complete Guide

Beltsys
6 min readAug 9, 2022

A Smart Contract is a self-executing piece of code that is stored on the Blockchain and triggered when specific conditions are met. This code can automate transactions and agreements between parties without needing a third party to oversee or approve the contract. So let’s look at what a smart contract is, how it works, and its advantages and disadvantages of It.

What is a Smart Contract?

A smart contract is a computer protocol intended to digitally facilitate, verify, or enforce the negotiation or performance of a contract. Smart contracts allow the performance of credible transactions without third parties. These transactions are trackable and irreversible.

A smart contract is self-executing, meaning that once the terms of the contract are met, the contract will automatically execute. This eliminates the need for a third party to mediate the transaction. Smart contracts also provide a high level of security and transparency, as they are stored on a public blockchain. The most popular smart contracts are ERC720, ERC 721, ERC 721a, and ERC 1155.

ERC 720:

This is the first standard for smart contracts on Ethereum and provides a general framework for writing smart contracts. In addition, it defines a registry where users can create and manage their smart contracts.

ERC 721:

This is the most popular standard for non-fungible tokens (NFTs). NFTs are unique digital assets that cannot be divided or exchanged like regular cryptocurrencies. The best example of an NFT is Cryptokitties.

ERC 721a:

This is an extension of the ERC 721 standard and allows for the creation of fungible tokens. These are tokens that can be divided or exchanged like regular cryptocurrencies. Furthermore, ERC 721a also introduces the concept of “atomic swaps,” which allows for the exchange of one type of token for another without the need for a third party.

ERC 1155:

This new standard allows for the creation of fungible and non-fungible tokens on the Ethereum blockchain. It is currently being developed by the Ethereum Community Fund.

Which is best: ERC 720, ERC 721, ERC 721a, or ERC 1155?

The best standard for smart contracts depends on your needs. If you want to create a non-fungible token (NFT), then ERC 721 is the best choice. If you want to create a fungible token, then ERC 721a or ERC 1155 are the best choices. If you need a general framework for writing smart contracts, then ERC 720 is the best choice.

How do Smart Contracts Work?

Smart contracts are stored on a blockchain, and they are triggered when certain conditions are met. For example, let’s say that you have a smart contract with a friend to split the bill for dinner. The terms of the contract would state that each person would pay an equal amount of money into the contract. Once the bill is paid, the money will be distributed accordingly. If one person tried to cheat and not pay their share, the contract would not be executed, and the other person would not have to pay anything.

Advantages of Smart Contracts

There are many advantages of using smart contracts:

· They are self-executing: This means that once the terms of the contract are met, the contract will automatically execute. This eliminates the need for a third party to mediate the transaction.

· They provide high security and transparency: Smart contracts are stored on a public blockchain. This means that they are secure and transparent.

· They are tamper-proof: Smart contracts cannot be modified or deleted. This makes them tamper-proof.

· They are faster and cheaper: Smart contracts are faster and cheaper than traditional contract methods because they eliminate the need for a third party to mediate the transaction.

· They are flexible: Smart contracts can be used for a variety of purposes.

· They are immutable: Once a smart contract is created, it cannot be changed.

· They are private and confidential: Smart contracts are stored on a public blockchain. However, the terms of the contract are only visible to the parties involved in the transaction.

Disadvantages of Smart Contracts

There are also some disadvantages of using smart contracts:

· They are not regulated: There is no governing body that regulates smart contracts.

· They are vulnerable to hacking: Smart contracts are stored on a public blockchain. This means that they are vulnerable to hacking.

· They are not well understood: Smart contracts are still a new technology, and the general public does not understand them well.

· They can be complicated to create: Smart contracts can be difficult to create because they require a certain level of technical expertise.

· They are not always binding: Smart contracts are not always binding. This means that the parties involved in the transaction can choose to ignore the terms of the contract.

· They are still a new technology: Smart contracts are still new, and they have not been widely adopted yet.

How to Create a Smart Contract

If you want to create a smart contract, you will need to use a programming language such as Solidity. Solidity is a programming language that is specifically designed for creating smart contracts.

Once you have created your smart contract, you will need to deploy it on a blockchain. The most popular Blockchain for deploying smart contracts is Ethereum.

You can also use a service such as EtherScan to deploy your smart contract. EtherScan is a service that allows you to deploy your smart contract on the Ethereum blockchain.

How to Use a Smart Contract

Once you have created and deployed your smart contract, you will need to use it. To use a smart contract, you will need to send a transaction to the contract address.

The transaction will trigger the execution of the smart contract.

For example, let’s say that you have a smart contract with a friend to split the bill for dinner. The terms of the contract would state that each person would pay an equal amount of money into the contract. Once the bill is paid, the money will be distributed accordingly.

If one person tried to cheat and not pay their share, the contract would not be executed, and the other person would not have to pay anything.

Use cases for Smart Contracts

Smart contracts can be used for a variety of purposes.

Some common use cases for smart contracts include:

· Payments: Smart contracts can be used to automate payments. For example, you could use a smart contract to automatically pay your rent every month.

· Escrow: Smart contracts can be used to create an escrow account. This would allow two parties to hold money in an account until a certain condition is met.

· Voting: Smart contracts can be used to create a voting system. This would allow people to vote on a variety of topics without the need for a third party to oversee the voting process.

· Tokenization: Smart contracts can be used to create tokens. These tokens can be used to represent a variety of assets, such as commodities, shares, or even loyalty points.

· Digital Identity: Smart contracts can be used to create a digital identity. This would allow people to store their personal information on the Blockchain, such as their name and address.

· Supply Chain: Smart contracts can be used to create a supply chain. This would allow businesses to track the movement of goods and ensure that they are being delivered on time.

· Trade Finance: Smart contracts can be used to create a trade finance system. This would allow businesses to finance their trade deals without the need for a bank.

· Financial Services: Smart contracts can be used to create a variety of financial services. For example, you could use a smart contract to create a peer-to-peer lending platform.

· NFTs: Smart contracts can be used to create non-fungible tokens (NFTs). NFTs are unique digital assets that can represent a variety of things, such as art, music, or even in-game items. For assistance in lunch your own NFT Marketplace, please visit our website (Beltsys).

Future of Smart contract

The future of smart contracts is still unknown. However, it is clear that they have the potential to revolutionize the way we do business. In the future, we may see more businesses using smart contracts to automate their transactions and agreements. We may also see more countries adopting smart contracts as a way to streamline their legal systems. Only time will tell what the future holds for smart contracts.

Conclusion

In conclusion, smart contracts are self-executing pieces of code that are stored on the Blockchain. Smart contracts can be used to automate transactions and agreements between parties. They have the potential to revolutionize the way we do business.

If you would like to learn more about smart contracts, please visit our website (Beltsys). We offer ERC721 and ERC1155 services to help you launch your own NFT marketplace.

Thank you for reading! We hope this article was informative and helpful. Please feel free to contact us if you have any questions.

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