What are Smart Contracts?
Tags: blockchain, web3, ethereum, smartcontract
Published: 2023-09-25 16:28:57

<p data-pm-slice="1 1 []">The concept of smart contracts originated in the 1990s with the creation of blockchain technology and has grown into a transformative force in finance, law, and beyond. But what exactly are smart contracts, and why are they considered so revolutionary?</p>

<h4>The Origins of Smart Contracts</h4>
The concept of smart contracts first emerged in the early 1990s, along with the <a class="attrlink" href="https://www.horizen.io/academy/cypherpunks/" target="_blank" rel="noopener noreferrer nofollow">cypherpunk movement</a> and the idea of using cryptography to enable privacy and security online.

In 1994, computer scientist and legal scholar <a class="attrlink" href="https://en.wikipedia.org/wiki/Nick_Szabo" target="_blank" rel="noopener noreferrer nofollow">Nick Szabo</a> coined the term "smart contract" in an essay. He defined it as "a computerized transaction protocol that executes the terms of a contract." Szabo envisioned the idea of embedding contractual clauses and executing them automatically through code rather than traditional contract law.

The principles behind smart contracts were inspired by innovations like secure cryptographic communications, digital cash systems like <a class="attrlink" href="https://en.wikipedia.org/wiki/DigiCash" target="_blank" rel="noopener noreferrer nofollow">David Chaum's DigiCash</a> in 1989, and Blythe Masters' invention of credit default swaps at JP Morgan in 1994.

However, the concepts largely remained theoretical because the technology did not yet exist to implement autonomous smart contracts. Szabo and others recognized the need for an immutable and transparent decentralized digital ledger.

In 2008, an anonymous person or group under the pseudonym Satoshi Nakamoto invented the first functional decentralized ledger known as blockchain when they launched the Bitcoin network. For the first time, a public database could be maintained decentralized through distributed computing.

In 2013, 19-year-old <a class="attrlink" href="https://ethereum.org/en/whitepaper/" target="_blank" rel="noopener noreferrer nofollow">Vitalik Buterin proposed in a white paper</a> the creation of Ethereum, a distributed computing platform featuring smart contract functionality. It would be the first blockchain capable of executing complex scripting language to implement smart contracts.

Ethereum launched in 2015 and quickly became the leading smart contract platform.

According to the <a class="attrlink" href="https://www.bankless.com/state-of-ethereum-report-q4-2022" target="_blank" rel="noopener noreferrer nofollow">2022 State of Staking report</a>, Ethereum currently processes an average of 1.5 million daily transactions and facilitated over $11 trillion in 2021 alone.

By enabling automation with conditions and value transfers, smart contracts are transforming many industries, from finance and banking to supply chains, healthcare, real estate, law, government, and more. Allied Market Research projects the global smart contracts market will reach $345.4 million by 2026.
<h4>How Smart Contracts Work</h4>
A smart contract is a computer program running on the blockchain when certain conditions are met. The main components are:
<ul>
 	<li><strong>Contract code </strong>- Contains the logic and rules governing the agreement, written in a language like Solidity for Ethereum. Defines the contract's behaviors.</li>
 	<li><strong>Digital signatures</strong> - Allows participants to digitally sign the contract with their private keys, proving their agreement to the terms.</li>
 	<li><strong>Incentives</strong> - Digital assets like cryptocurrency can be programmed to transfer between participants upon fulfillment of contract conditions.</li>
 	<li><strong>Distributed ledger</strong> - Records transactions that occur as the smart contract executes. Provides transparency and a single source of truth.</li>
</ul>
The contract logic handles the enforcement, payments, penalties, etc., without a central authority. The immutable ledger also creates trust between unknown counterparties.
<h4>Key Benefits of Smart Contracts</h4>
Smart contracts provide several major advantages compared to traditional paper contracts. First, the autonomy of smart contracts reduces the need for intermediaries and oversight, cutting costs significantly.

They execute automatically based on pre-defined conditions without requiring a managing authority.

Automated contracts are much more accurate and less prone to human error, ambiguities, misinterpretations, and disputes. The precise, conditional code logic minimizes mistakes.

Why all participants can validate the current state of the smart contract at any time by checking the public, transparent ledger; this transparency builds further trust between parties.

The automated execution allows near-instantaneous settlement of financial transactions, orders, transfers, etc. This superior speed opens up new possibilities for trade and commerce.

Smart contracts reduce reliance on fee-charging intermediaries like lawyers, bankers, brokers, and auditors for functions like enforcement, payments, regulatory compliance, etc. This cuts costs and inefficiencies substantially.

Finally, the combination of independent verification, immutable records, and transparency builds trust between transacting parties, even if they are strangers. Smart contracts effectively replace traditional mechanisms of contractual trust.
<h4>Use Cases for Smart Contracts</h4>
Many industries are leveraging smart contracts to streamline processes and reduce costs. Some major use cases include:
<ul>
 	<li>Finance - Automating payments, trading, lending, and insurance. Allows decentralized finance without traditional intermediaries.</li>
 	<li>Supply chain - Tracking shipment locations, conditions, and authenticity. Enables transparent and efficient trade.</li>
 	<li>Real estate - Managing property registries, transfers, rentals, and home sales. Avoids title fraud.</li>
 	<li>Voting - Secure digital voting through voter-verified audit trails. Reduces fraud and tampering.</li>
 	<li>Identity - Managing digital identifiers and attestations like licenses and certifications. Enhances KYC/AML.</li>
 	<li>Healthcare - Secure access and sharing of medical records. Better protect patient data.</li>
 	<li>Law - Legally binding programmatic contracts. Facilitates arbitration and contract dispute resolution.</li>
 	<li>Gaming - Managing in-game assets and implementing provably fair gaming. Enables play-to-earn model.</li>
</ul>
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<h4>The Future of Smart Contracts</h4>
As blockchain adoption grows, smart contracts are poised to transform many essential business processes fundamentally.

According to <a class="attrlink" href="https://www.verifiedmarketresearch.com/product/smart-contracts-market/" target="_blank" rel="noopener noreferrer nofollow">Allied Market Research</a>, the global smart contracts market size already surpassed $170 million in 2021 and will likely expand at a CAGR of 17.4% from 2022 to 2030.

Here are some predictions for the future of smart contract adoption:
<ul>
 	<li>Mainstream blockchains like Ethereum will implement upgrades like proof-of-stake to enable faster and cheaper smart contracts at higher scales.</li>
 	<li>Integration with off-chain data from external APIs will expand smart contract functionality. Oracles allow real-world data to trigger contract execution.</li>
 	<li>Smart contract standards will emerge to ensure consistency, interoperability, and compliance across applications.</li>
 	<li>Automated smart contract testing and formal verification will improve security and prevent major exploits.</li>
 	<li>Machine learning integration will allow more complex and adaptive contract logic resembling artificial intelligence.</li>
 	<li>Governments will develop standardized frameworks to recognize blockchain-based smart contracts legally.</li>
 	<li>Decentralized autonomous organizations (DAOs) will manage entire companies and communities through smart contract governance.</li>
</ul>
Smart contracts are self-executing scripts that revolutionize contract law, financial services, supply chain management, and many other fields.

As blockchain adoption accelerates, smart contracts will likely emerge as one of the most impactful applications of distributed ledger technology, ushering in an era of decentralized, transparent, and efficient contractual agreements on a global scale. Their full disruptive potential is still being unlocked.

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