What is a Smart contract and how does it work

A smart contract is an agreement concluded by two parties using computer code stored openly in a database and cannot be modified. As with any other contract, smart contracts specify the conditions of an agreement or transaction. In smart contracts, the terms are set and enforced through code running on blockchain, not on paper lying on a lawyer's desk.

Smart contracts take the core idea underlying Bitcoin - transmitting and collecting money without a "trusted third party," such as a bank - to allow any type of transaction to be reliably automated and decentralized, regardless of complexity.

In other words, the purpose of a smart contract is to facilitate commerce between anonymous and identified parties without necessarily requiring a central authority, a legal structure, or an outsider compulsory mechanism.

The best-known smart contracts platform is Ethereum, a widely used cryptocurrency platform as well. And since they run on a blockchain the way Ethereum does, smart contracts offer security, credibility, and limitless availability.

Smart Contract History and Creation

The concept of smart contracts first came about in 1994 by Nick Szabo, an American computer scientist who created a digital currency named "Bit Gold" in 1998, a decade before bitcoin was invented. By the way, Szabo is often thought to be the real Satoshi Nakamoto, the anonymous founder of Bitcoin, which he has denied.

Szabo had the idea of having the ability to script contracts as computer code. This contract would be automatically activated when specific requirements are fulfilled. Such an idea could eliminate the necessity for a trusted third-party company (such as a bank), as the contracts (or transactions) are executed autonomously on a trusted network that is fully monitored by computers.

Szabo spent years working on this idea. The challenge was that blockchain technology was not around back in 1994. In 2008, Bitcoin was invented on the blockchain network with a shared ledger that traces monetary transactions. This technology led to the development of smart contract codes used to add contract terms to the blockchain. Nowadays, given the increasing adoption of bitcoin and the embrace of blockchain technologies, smart contracts are gaining popularity.

How Does a Smart Contract Work?

Smart contracts function by using simple "if/when... then..." statements, written in code on a blockchain. The computer network performs the operations when pre-specified conditions are met and validated.

Szabo famously compared the smart contract to a vending machine. Like a vending machine can mechanize a sale with no human intermediary, smart contracts can automate almost any type of exchange.

A smart contract can be generated and deployed on a blockchain by everyone. As their code is transparent and subject to public verification, any concerned party would see the exact logic that a smart contract uses when it obtains digital assets.

To be executed, smart contracts on the Ethereum network typically require a fee called "gas" (named so since the fee powers the operation of the blockchain). After being deployed on the blockchain, smart contracts mostly cannot be modified, not even by their creator, which helps protect them from being censored or terminated. This rule has exceptions, however.

Benefits of Smart Contracts

Smart contracts enable developers to create a broad range of decentralized applications and tokens. From new financial instruments to gaming experiences, they are utilized in pretty much everything. These smart contracts are held on a blockchain just like any other digital currency transaction. The benefits of smart contracts include:

• Speed, efficiency, and exactness - As soon as a requirement is fulfilled, the contract is instantly carried out. Since smart contracts are digitized and fully automated, no paperwork is needed and no time is wasted fixing errors that often occur when filling out documents manually.
• Reliability and transparency - As no third party is involved, there is no need to doubt if the information has been amended for private purposes.
• Security - Smart contract security is among its greatest advantages. Transaction records on a blockchain are encrypted, thereby posing a significant challenge to hackers. And since the records are chained together, hackers would need to modify the whole chain to alter a single record.
• Savings - Smart contracts eliminate the need for intermediaries to process transactions and therefore related delays and commissions.

Smart Contract Security

Smart contracts safeguard some key elements in a business flow involving several parties. However, smart contracts have been exposed to security incidents leading to significant monetary losses. At the dawn of Ethereum, smart contract hackers succeeded in stealing million worth of cryptocurrency.

To solve the security problems of smart contracts, investigators have suggested a wide set of defense solutions. These include language-based security, static analysis, and execution-time checks.

Since security vulnerabilities and flaws in smart contracts can lead to disastrous financial implications, smart contract security audits are essential. Conducting security audits can be delegated to cybersecurity professionals, like Hexens, who will prepare a well-qualified audit report on the security issues they detect.

Smart contracts have the power to make the world a better, commission-free place with a decreased number of frauds and delays.