The Alankrit Srivastava Blog

Tag: decentralized applications

  • Day 15 — What Actually Makes an App a dApp?

    Watercolor illustration of a user interface connecting a wallet to decentralized smart contracts

    What a decentralized application is

    A decentralized application, or dApp, is an app that uses blockchain-based rules instead of relying only on one company’s server.

    The screen may look like a normal website. However, the important actions connect to smart contracts.

    That is what makes a decentralized application different from a regular web app.

    The frontend still matters

    Most dApps still have a frontend. This is the page users see in the browser.

    The frontend helps users read information, choose actions, and connect a wallet.

    So, a decentralized application is not only smart contracts. It also needs a usable interface.

    The wallet replaces the login

    In many dApps, the wallet acts like the user account.

    The wallet signs messages and transactions. Then the blockchain can verify that the action came from the right user.

    This gives users more control, but it also creates more responsibility.

    Smart contracts hold the rules

    A smart contract is code that runs on a blockchain.

    For a decentralized application, smart contracts may manage tokens, lending, voting, swaps, or game items.

    Because the rules are public, users can inspect them. Still, public code can contain bugs.

    The takeaway

    A decentralized application combines a frontend, wallets, smart contracts, and on-chain state.

    It can be powerful because users interact with open rules. However, they must also understand fees, signatures, and contract risk.

  • Day 8 — What If Money Could Follow Instructions?

    A smart contract running on a blockchain as a shared programmable agreement

    When money follows instructions

    Smart contracts make blockchain money programmable. They let value move only when certain rules are met.

    Bitcoin showed that money can move without a bank. Ethereum asked a bigger question. What if money could also follow logic?

    That idea turns a blockchain from a payment ledger into a shared computing platform.

    A simple example

    Imagine a small bet between two friends. A normal version needs trust. One person holds the money, or both trust a third person.

    A smart contract changes the setup. The rules can be written in code. Then the contract can release funds when the condition is met.

    In practice, real contracts need careful design. Still, the basic idea is simple. Rules can hold and move value.

    Why Ethereum matters here

    Ethereum was built for this broader kind of logic. It can store balances, run code, and update shared state.

    Because of that, developers can create tokens, lending apps, exchanges, games, and governance tools.

    However, the blockchain does not make every app safe. Bad code can still cause real losses.

    The trade-off

    Programmable money is powerful. It can remove some middlemen and create open financial tools.

    But it also adds complexity. Users must understand wallets, fees, approvals, and contract risk.

    Therefore, smart contracts are useful, but they are not magic.

    The takeaway

    A smart contract is a rule machine on a blockchain. It can hold assets and act when its conditions are met.

    That is the bridge from simple digital money to Web3 applications.