The structure and functioning of dApps: smart contracts and blockchain

Decentralised applications, dApps for short, are based on blockchain technology and smart contracts.

These applications operate on networks where all computers are peers and all contribute to the network.

But how exactly do these applications work and how are they built?

Let's start with smart contracts, which are in fact one of the key components of dApps.

Smart contracts are programs that automatically perform certain actions when certain conditions are met.

For example, a smart contract can be programmed to automatically transfer cryptocurrency from the buyer to the seller when the product has been successfully delivered to the seller. Because smart contracts are automated, they avoid the risk of human error and fraud associated with traditional contracts.

In addition, smart contracts also ensure transparency and reliability of dApp transactions, as all transactions are publicly visible and final on the blockchain.

As the blockchain is decentralised, there is no need for a central server or third party to execute transactions.

When designing dApps, developers need to keep in mind the limitations of the blockchain, such as scalability.

DApps are often slower than traditional applications because each transaction has to be checked by all computers on the network.

For this reason, developers need to optimize their dApps to minimize the number and duration of transactions.

Last but not least, security is a key consideration when developing dApps.

Since blockchain transactions are final and irreversible, developers need to carefully test their smart contracts to avoid errors and abuse.

In addition, developers should build mechanisms into their dApps to block malicious users and prevent abuse of the system.

Building and operating dApps is a complex process that involves the use of blockchain and smart contracts to create decentralised, transparent and trusted applications.

Developers must take into account the capabilities and limitations of blockchain and ensure the security and user-friendliness of their dApps.