What are Smart Contracts in Blockchain?

Maaz Tariq

12 Jun, 2025

.

5 min read

What are Smart Contracts in Blockchain

Smart contracts are projected to process over $500 billion in transactions by 2030, according to Statista, with enterprise adoption reaching nearly 90% across key industries.

Smart contracts are coded into a blockchain and are without the involvement of any third parties in an execution process. It is calculated that by the year 2025, around 10% of world GDP will be on blockchain, and a large part of this amount will be made with the help of smart contracts.

Smart contracts bring businesses, developers, and users together without needing an intermediary. These blockchain protocol elements translate into fewer operating costs and quicker, safer transaction systems. 

From finance to real estate, smart contracts have started colorizing the way one finishes contracts. They form part of a larger trend encompassing the rise of AI apps, blockchain, and crypto wallet development.

In this blog, we shall try to build up a basic understanding of smart contracts. You will come to know about its working, some advantages, and real-world applications. 

Read More: Best Practices for Smart Contract Development

What are Smart Contracts

What are Smart Contracts?

Smart contracts are regular contracts but produced digitally that can only be executed on a code basis. These contracts are stored on a blockchain and execute automatically when preset conditions are met.

They don’t authenticate or involve a third-party lawyer. The code plays a role like a digital law; hence, it makes everything simple and efficient.

Platforms such as Ethereum made it happen. Developers can now do interfaces within the network for smart contracts for a wide diversity of uses. From NFT marketplaces to crypto banks and even dApp development.

Being on the blockchain means that, once a smart contract is live, it becomes immutable. Hence, it would lead to a trust-free and tamper-proof system.

Read More: DApps vs. Smart Contracts – All You Need to Know

People often ask, what are smart contracts? And the simplest answer is they are self-executing contracts with no possibility of being actualized otherwise.

“Smart contracts are the invisible engine behind next-gen blockchain apps. At Cubix, we turn that engine into high-performance solutions.”

Salman Lakhani, CEO Cubix

How Smart Contracts Work on the Blockchain

How Smart Contracts Work on the Blockchain

When we think about smart contracts, they basically work on a few simple rules. The rules are coded in the blockchain, and when a condition is true, the contract performs the action.

Let us suppose you buy an item in an ecommerce app. The item delivery may trigger a smart contract to release the payment. In this way, both buyers and sellers are protected.

In addition, these contracts would have the advantage of immutability. Once written and uploaded, no one can change it. A number of platforms support smart contracts. The largest is Ethereum; others include Binance Smart Chain, Solana, and Cardano.

These platforms enhance the efficiency and security of blockchain development. Smart contracts for automation are now used by many applications, including AR, VR, and Metaverse apps.

Also, many of the developers for cross-platform systems prefer working with smart contracts. Examples are Flutter, Ionic, and Hybrid app development. In either iOS or Android app development, smart contracts enrich the process: they fast-track, secure, and become a reliable source.

So what are smart contracts doing in these applications? They verify transactions, steer user actions, and automate workflows.

Read More: Top 10 Cross-Platform App Development Frameworks

Key Benefits of Smart Contracts

Key Benefits of Smart Contracts

Smart contracts offer various advantages across multiple industries, with major ones including

Transparency and Trust

Smart contracts are visible since they exist on the blockchain; anyone can verify them. Trust is built because of this transparency between users and the platforms. Picture a smart contract in a Defi staking platform development; users will know what will happen to their money. There is nothing left to wonder about.

Automation and Reduced Costs

Smart contracts, when triggered, perform their work automatically, therefore saving time while also reducing the margin for errors. There is no need for middlemen, hence lesser fees. In other words, smart contracts could regulate supply and demand automatically in stablecoin development.

Enhanced Security and Accuracy

Smart contracts are hard to hack due to their potent encryption and an extremely secure blockchain to live on. Many enterprise app developers use smart contracts to secure user data. It adds a protection layer to sensitive apps. Even apps such as the visionOS app and IoT app make use of these secure contracts. Therefore, the data flow goes smoothly, securely, and with no human errors.

Real-World Applications: What are Smart Contracts Used For?

Real-World Applications for Smart Contracts

Smart contracts find application in various industries. Let us explore a few practical examples where they really shine.

DeFi, Insurance, and Banking

Smart contracts are instrumental to DeFi’s existence, from lending, savings, and insurance to offering utilities without banks. The crypto bank, for example, utilizes smart contracts to govern all activities, including deposits, interest payments, and much more. Smart contracts also power decentralized exchanges, running live token swaps and trade executions. 

Real Estate and Legal Automation

Buying real estate entails a lot of processes, which these smart contracts could help simplify. Once all documents have been verified, the smart contract transfers ownership and money. This eliminates delays and reduces legal expenses while also adding an extra layer of safety and speed. Digitization and automation make sure the contract is enforced in the way that it was originally signed.

NFTs and Digital Ownership

NFTs are digital objects, and their ownership is maintained via smart contracts. If someone buys an NFT, a smart contract updates the new owner on the blockchain. This has created marketplaces for artists, game developers, and so many others. The NFT marketplace is built on smart contracts to ensure that every transaction is safe and transparent. Similarly, in the metaverse app projects, items, lands, and avatars require smart contracts for ownership. 

Read More: Should You Invest in NFTs? A Guide for Investors

Challenges and Limitations of Smart Contracts

Smart contracts are quite remarkable and all, but they don’t come without their hitches. Let us look into these in full detail.

Programming Bugs and Security Issues

Smart contracts can be very costly, and they should be programmed very carefully, as minor errors can cause very great damage. The hackers are usually looking for bugs in smart contracts. Insecure smart contracts have been the cause of bleak losses worth millions of dollars. Thorough audit provides an extra layer of secure coding, which is key to safe smart contract development.

Legal Ambiguity

Smart contracts still have not been constituted as law. Therefore, it becomes very difficult to track the problem into the courts. Most countries are conflicted between the law and regulations under which the smart contract is considered. Smart contracts need to be used well under prudence as far as high-risk areas are concerned until they become fully accepted by the law.

Scalability and Cost Problems

When blockchain networks are crowded, it slows down and increases cost, as Ethereum has high “gas” fees. These problems hamper the use of smart contracts in large-scale systems. 

Development teams are building faster and cheaper networks as a Protocol. The improvements will reflect on smart contract scaling.

Read More: 5 Key Blockchain Protocols You Need to Know

Smart Contracts in Cubix’s Blockchain Development Projects

Smart contracts are employed for safe and automated blockchain solutions for worldwide clientele. These agreements remove a great deal of the manual inputs and cut costs. They power platforms like DApps, NFT marketplaces, and decentralized finance systems. 

Smart Contracts in Cubix

Cubix’s team excels in smart contract development with strict coding standards. Each contract is thus secure, efficient, and immutable. From crypto wallets to protocol development, Cubix integrates smart contracts to guarantee faster and transparent transactions. 

Their solutions promote a development atmosphere for Defi staking platforms, Stablecoin development, and many more. Cubix provides dependable blockchain development solutions through smart contracts for industries such as finance, gaming, healthcare, and ecommerce.

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Maaz Tariq

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