Decentralized application

DApps are conventionally open-source. Some DApps that are fully closed-source and partially closed-source also exist. Bitcoin, the first cryptocurrency, is an example of a DApp. == Usage ==

DApps can be classified based on whether they operate on their own block chain, or whether they operate on the block chain of another DApp. Smart contracts Smart contracts are programs which maintain data on the blockchain and to execute operations. Proof-of-work utilises computational power to establish consensus through the process of mining. Bitcoin uses the proof-of-work mechanism. Proof-of-stake is a consensus mechanism that supports DApps through validators that secure the network by having a stake and percent ownership over the application. s DApps distribute their tokens through three main mechanisms: mining, fund-raising and development. In mining, tokens are distributed as per a predetermined algorithm as rewards to miners that secure the network through transaction verification. Tokens can also be distributed through fundraising, whereby tokens are distributed in exchange for funding in the initial development phase of the DApp, as in an initial coin offering. Lastly, the development mechanism distributes tokens that are set aside for the purpose of developing the DApp through a pre-determined schedule. There are three main steps that always occur in the formation and development of any DApp: the publishing of the DApp's whitepaper, the distribution of initial tokens, and the distribution of ownership. Firstly, the whitepaper is published, describing the DApp's protocols, features and implementation. Then, required software and scripts are made available to the miners and stakeholders that support the validation and fundraising of the network. In exchange, they are rewarded with the initial tokens distributed by the system. Lastly, as greater numbers of participants join the network, either through utilisation of the DApp or through contributions to the DApp's development, token ownership dilutes, and the system becomes less centralised. == Characteristics ==

DApps have their backend code running on a decentralized peer-to-peer network, as opposed to typical applications where the backend code is running on centralized servers. A DApp can have frontend code and user interfaces written in any language that can make calls to its backend. DApps have been utilized in decentralized finance (DeFi), in which dapps perform financial functions on blockchains. Decentralized finance protocols validating peer-to-peer transactions, such as Aave Protocol, are expected to disrupt centralized finance and lower costs. The performance of a DApp is tied to its latency, throughput, and sequential performance. Bitcoin's system for transaction validation is designed so that the average time for a block on bitcoin's blockchain to be mined is 10 minutes. More recent DApp projects, such as Solana, have attempted to exceed that rate. Internet connectivity is a core dependency of blockchain systems, which includes DApps. This is an issue for Ethereum, which is attributed to increased network traffic caused by DApps built on the Ethereum blockchain, such as those used by Non-fungible tokens (NFTs). Transaction fees are affected by the complexity of a DApp's smart contracts, and by the particular blockchain. == Trends ==

Ethereum is the distributed ledger technology (DLT) that has the largest DApp market. DApps have not achieved wide adoption. Potential users may not have the skill or knowledge to be able to effectively analyse the differences between DApps and traditional applications, and also may not value those differences. This skill and information can be difficult to access for mainstream users. Additionally, the user experience for DApps is often poor, as they are often developed to prioritize functionality, maintenance and stability. Many DApps struggle to attract users, particularly in their founding stages, and even those that attract widespread initial popularity struggle to retain it. A notable example was the DApp CryptoKitties, which heavily slowed down the Ethereum network at the height of its popularity. CryptoKitties and another similar gaming-based DApp Dice Games have failed to attract similar traction since. == References ==