Blockchain
Blockchain
A blockchain is a shared, tamper-evident record maintained by a network. Depending on the design, participants can verify transactions without relying on one database operator. Not every project needs a blockchain.
Tools and technologies
- Ethereum
- Hyperledger Fabric
- Solidity
- Hardhat
- Foundry
- IPFS
- Wallets and blockchain explorers
Practical examples
- A verifiable record of land-document events with authorised access and legal checks.
- Tracking the custody of agricultural produce from farm to market.
- A smart contract that releases a payment when agreed conditions are verified.
Application areas
- Supply-chain traceability
- Digital credentials
- Asset tokenisation research
- Audit trails
- Programmable agreements
Suggested hands-on project
Mini project: deploy a test-network smart contract that records a product batch ID, timestamp and status. Use dummy data, document who can update it, and test failure cases before considering any real deployment.
A typical workflow
Identify trust and audit problem → compare a normal database with distributed-ledger options → design permissions and governance → prototype on a test network → audit security → pilot with stakeholders.
How to get started
Choose one small, measurable problem, build a prototype with sample data, document assumptions, test common failure cases, and collect feedback before expanding it.
Responsible use: Blockchain does not prove that information entered was true. Legal enforceability, privacy, key management, fees and irreversible transactions require careful planning. Never use a demo contract to hold real funds.