The Inverell Times

What is a smart contract on blockchain?

Smart contracts are fundamentally changing the landscape of digital agreements. Picture Shutterstock
Smart contracts are fundamentally changing the landscape of digital agreements. Picture Shutterstock

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In the ever-evolving realm of blockchain technology, one term has garnered substantial attention: "smart contracts." These innovative contracts are fundamentally changing the landscape of digital agreements, serving as a potent convergence of blockchain and contract law. Their advantages over traditional contracts are manifold.

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In this blog post, we will delve deeply into the concept of smart contracts, exploring their inner workings, practical applications in the real world, and the transformative potential they possess across various industries.

Understanding smart contracts

A smart contract is a self-executing, self-enforcing digital contract encoded on a blockchain. It operates based on predefined rules and conditions, with the contract terms written in code rather than in a natural language.

These contracts are designed to automate and facilitate the execution of agreements without the need for intermediaries, such as lawyers or notaries.

Key characteristics of smart contracts

  • Immutable: Once deployed on a blockchain, smart contracts are tamper-proof and cannot be altered, ensuring the agreement's integrity.
  • Self-executing: Smart contracts automatically execute when the predefined conditions are met, eliminating the need for manual intervention.
  • Trustless: They eliminate the need for trust between parties, as the code enforces the terms, and the blockchain provides transparency.
  • Decentralised: Smart contracts run on a decentralised network of computers (nodes), making them resistant to censorship and single points of failure.

Mechanics of smart contracts

Smart contracts are powered by blockchain technology, providing a secure and transparent environment for execution. Let's break down the mechanics of how smart contracts work:

  • Creation: Smart contracts are typically written in specialised programming languages, such as Solidity for Ethereum. Developers define the contract's rules, conditions, and functions.
  • Deployment: Once the contract code is written, it is deployed onto a blockchain network. This action incurs a one-time transaction fee.
  • Execution: Smart contracts remain dormant until specific conditions, often called "trigger events," are met. When triggered, they automatically execute the agreed-upon actions, such as transferring digital assets or updating records.
  • Validation: The decentralised nature of blockchain ensures that multiple nodes on the network validate contract execution. This validation process ensures the trustworthiness of the contract's outcome.
  • Immutability: The contract's code and execution history are stored on the blockchain, making them immutable and transparent for all participants.

Real-world applications of smart contracts

Smart contracts have a wide range of real-world applications across various industries. Here are some notable examples:

  • Supply Chain Management: Smart contracts can automate and streamline supply chain processes, ensuring transparency and traceability of goods from production to delivery.
  • Insurance: Claims processing in the insurance industry can be automated, reducing fraud and speeding up payouts when specific conditions are met.
  • Real Estate: Property transactions can be facilitated through smart contracts, simplifying the buying and selling process and reducing the need for intermediaries.
  • Finance: Decentralized finance (DeFi) platforms utilise smart contracts for lending, borrowing, and trading digital assets, giving users greater control over their finances.
  • Legal: Legal agreements, such as wills and trusts, can be encoded in smart contracts to ensure their execution according to the specified terms.
  • Healthcare: Patient records can be securely managed and shared through smart contracts, enhancing data privacy and interoperability.

The future of smart contracts

As blockchain technology continues to evolve and gain wider adoption, the future of smart contracts looks promising. Here are some potential developments and challenges:

  • Interoperability: The ability for smart contracts to operate seamlessly across different blockchain networks is a key area of development, allowing for more extensive use cases.
  • Legal Recognition: The legal status of smart contracts varies by jurisdiction. Widespread legal recognition and regulatory frameworks will be essential for broader adoption.
  • Scalability: Blockchain networks must address scalability issues to handle a growing number of smart contracts and users efficiently.
  • Privacy: Enhancing the privacy of smart contracts, especially in industries like healthcare and finance, is crucial for their continued growth.


Smart contracts represent a paradigm shift in how digital agreements are made and executed. Their immutability, automation, and trustless nature have the potential to revolutionise industries and reduce the need for intermediaries.

As blockchain technology matures and regulatory frameworks adapt, smart contracts are poised to play a more significant role in shaping the future of commerce, law, and finance.

Embracing this technology offers the potential for increased efficiency, transparency, and security in a wide range of applications, ultimately reshaping the way we do business in the digital age.