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Questions tagged [decentralized-applications]

A decentralized application (Dapp, dApp or DApp) is an application that is run by many users on a decentralized network with trustless protocols.

259 questions
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What does alchemy do in blockchain?

I am new to web3 and I am trying to deploy a contract to a blockchain.So I connected my metamask to it and in the tutorial I am following they instructed me to create an app on Alchemy.So why is it I need alchemy here.What is it exactly doing?
prasanna jakku
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Is zk-snarks implementable in this use case-scenario?

I want to do something similar to a pet popularity contest dapp. From what I understand, it would involve non-interactive zero-knowledge proof. There is an application with a list of pets competing in a popularity contest. Each pet has a popularity…
AndrewHoover898
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Running "npm run dev" command results in firefox tab crash, but terminal shows no error (running DApp with web3,js)

I am running Ubuntu 16 on virtual box, using: Node v16.14.2, npm v8.5.0, Truffle v5.3.7 (core: 5.3.7) Solidity v0.5.16 (solc-js) Node v16.14.2 Web3.js v1.3.6 The project I am working on is a slightly modified version of the Decentralizied App found…
dabadee
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How to import hardhat to this repository

I am working on a dApp using this repository: https://github.com/ipfs-shipyard/nft-school-examples/tree/main/end-to-end I am trying to import the hardhat. I've installed it with yarn add hardhat. When I import the hardhat with const _hardhat =…
MehmedB
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How to create subfolders with IPFS CIDs?

I'm trying to deploy an NFT. It's a replica from the mfers contract. The mfers contract has the token URI referenced as ipfs://QmWiQE65tmpYzcokCheQmng2DCM33DEhjXcPB6PanwpAZo/# Where # is the token number. Across all tokens, the ipfs hash…
pjonson2
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Solidity - Getting from Factory Pattern to Clone Factory Pattern

Below is an example of a solidity contract that's a factory pattern native approach that's adding crew to the neb starship in the matrix. What would be the Clone Factory version of this contract? // SPDX-License-Identifier: MIT pragma solidity…
Mabel Oza
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How to connect solana wallet in android?

I want to make nft marketplace with solana in android. There are many examples connecting solana wallet(ex. solflare, phantom ...) in web client. But i don't know how to connect wallet in android dapp.
SeohyeonPark
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WalletConnect fails to get bundled with vite

I have a vite project that uses @walletconnect/client. Everything works fine with npm run dev but during build (npm run build) I get these errors error during build: Error: 'removeHexPrefix' is not exported by…
Weavil
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How to track transaction status on elrond network

Can someone help with tracking the transaction status of a value transfer on the elrond network? const testTransaction = new Transaction({ value: Balance.egld(1), data: new TransactionPayload('Test Transfer'), receiver: new…
5ymmetric
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Why Metamask if web3.js can interact directly with ganache?

I am new to blockchain app development, I saw a project where ganache accounts are imported into Metamask, then web3.js is used to access and print those accounts and balances on Frontend (user interface). If web3.js can directly access ganache…
ritik jain
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ERC20: mint to the zero address exception when trying to buy my own ERC20 token (based on OpenZeppelin) from my own simple DEX

I have implemented my own ERC20 token (based on OpenZeppelin's implementation). I created a supply for my token and used that supply to create a very simple decentralized exchange (DEX) based on this guide. I do not understand why I keep getting the…
Join_Where
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On truffle compile I get : FATAL ERROR: NewNativeModule Allocation failed - process out of memory?

I`m trying to migrate a solidity smart contract. When trying to migrate with truffle I get: I had this issue a few times and now know that is related to changing solc compilers versions, at least this is how I fixed it until now, but this time…
heyooo12
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How does the s/kademlia sibling list work?

i am studying p2p network recently. when i was reading the s/kademlia paper, i found that the sibling broadcast related content is not detailed enough. here is my question: how the sibling list works? how can it solve highly unbalanced tree…
RedAFD
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How can I solve this error? "command not found: puppeth"

[eunsungahn@eunsungui-MacBookPro Blockchain % geth version Geth Version: 1.10.1-stable Git Commit: c2d2f4ed8f232bb11663a1b01a2e578aa22f24bd Git Commit Date: 20210308 Architecture: amd64 Go Version: go1.16 Operating System:…
siham
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Adding IPNS link to ipfs-desktop

What is the correct way to add an IPNS site to ipfs-desktop? The purpose would be to seed a website on several computers, let's say 5. So, I give my IPNS link to 5 of my friends. How can they contribute to hosting that site?
Imestin
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