BlockchainBeginner#Software#Web3
dApp (Decentralized Application)
d
Definition
An application that combines a user interface with smart contracts or other decentralized-network components. Its interface, data services, wallet connection, and operations may still have centralized dependencies.
Source reviewed
- Ethereum.org: Technical introduction to dapps opens in a new tab
Supports: Explains dapp contract and frontend components and notes that centralized services can remove decentralization benefits.
- Ethereum.org: Why build on Ethereum opens in a new tab
Supports: Explains that frontends, wallets, and RPC providers can fail or filter even when base-layer execution remains open.
Concept Diagram
Key Takeaways
1
A dapp can combine on-chain contracts with centralized or decentralized frontends, RPCs, data services, and operators.
2
Protocol-layer openness does not guarantee frontend availability, uncensored access, no KYC, or no operational dependency.
3
Wallet signatures and token approvals require independent review of destination, amount, permissions, network, fee, and consequence.
4
A dapp label or polished interface is not evidence that its contract, request, or transaction is safe.
Practical Example
A user opens a dapp through a saved domain, confirms the chain and contract in the wallet, and sees an unlimited token approval request. They stop to compare the spender address and requested permission with the documented contract, then either limit the approval or decline. A working interface does not make an approval safe.
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Related Terms
Blockchain
DAO (Decentralized Autonomous Organization)An organization or governance arrangement that uses blockchain-based rules, proposals, membership, and treasury controls to coordinate decisions or actions. Its voting, execution, transparency, and legal structure vary by design.
Blockchain
DEX (Decentralized Exchange)An exchange design that uses blockchain transactions, smart contracts, or an onchain order book to match or execute trades. Custody, operator roles, access controls, fees, execution, and protections vary by protocol and jurisdiction.
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EVM (Ethereum Virtual Machine)Ethereum's execution environment: a deterministic virtual machine that executes smart-contract bytecode as part of Ethereum state transitions. EVM compatibility does not make contracts, addresses, assets, or deployments interchangeable across networks.
Blockchain
Smart ContractA program and its state deployed at a blockchain address, which runs its defined functions when transactions call it.
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