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Lesson 14 of 29
beginner5 minQuiz included

Decentralization

What Are Dapps

DeFi, smart contracts, dApps, and DAOs — software replacing middlemen.

Updated Oct 21, 2026GaiaEx Academy Editorial

In this lesson

  • What makes an app 'decentralized'
  • How users connect to dApps

Key takeaways

  1. 1A dApp runs its backend logic on-chain via smart contracts
  2. 2Users connect through a wallet, not an account
  3. 3Its open code can be independently verified

Lesson summary

A dApp is an application whose core state or execution depends on smart contracts.

Mental model

The core idea behind dapps

A dApp is an application whose core state or execution depends on smart contracts. The interface can look normal, but the trust model changes underneath.

  • What makes an app 'decentralized'
  • How users connect to dApps

Mechanics

How to reason about dapps

The front end helps users build transactions.

The wallet signs actions and submits them to the chain.

The smart contract applies the rule and updates on-chain state.

  • A dApp runs its backend logic on-chain via smart contracts
  • Users connect through a wallet, not an account
  • Its open code can be independently verified

Example

A concrete dapps example

A DEX website may disappear, but if the contracts are still live and accessible, users can interact through another interface or directly through the chain.

RememberDecision rule: Judge a dApp by its contracts and dependencies, not only by how polished the interface looks.

Common mistakes

What to unlearn about dapps

Users often trust the website instead of the contract. A malicious or compromised front end can trick users into signing a harmful action.

Risk notes

What can go wrong with dapps

dApps inherit risks from contracts, front ends, wallets, RPC providers, oracles, and every protocol they compose with.

  • Separate front end from contract.
  • Know what the wallet is signing.
  • Identify one dependency risk.

Practice

Practise dapps before moving on

  • Separate front end from contract.
  • Know what the wallet is signing.
  • Identify one dependency risk.

Review

Key terms

DApp
Decentralized Application — software whose backend logic runs on a blockchain via smart contracts.
DeFi
Decentralized Finance — permissionless, composable financial services built on smart contracts.
Smart Contract
Self-executing code on a blockchain that runs exactly as written when conditions are met.
Wallet
Software or hardware that stores the private keys controlling your on-chain assets.
On-Chain
Data or activity recorded directly on the blockchain.

Source notes

Editorial references

These references are starting points for verifying the mechanisms, risk checks, and product context behind this lesson.

ethereum.orgEthereum security and scam preventionPractical reference for private keys, recovery phrases, phishing, approvals, and scam patterns.ethereum.orgEthereum walletsReference for wallet responsibilities, keys, and user-side custody.ethereum.orgSmart contract securityReference for common contract vulnerabilities, audits, and defensive review practices.GaiaEx DocsAPI security best practicesProduct reference for signing, keys, allowlists, and operational security.

Before you continue

Can you do these?

  • Separate front end from contract.
  • Know what the wallet is signing.
  • Identify one dependency risk.

Related learning

Keep reading

Next lessonWhat Is DAOBeginner Track course pathPrevious lessonSmart ContractsBeginner Track course pathTrack overviewBeginner Track29 lessonsGlossaryDApp and related terms5 terms from this lesson

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A dApp differs from a normal app because…

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