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Questions tagged [dapps]

Questions about applications and projects on Ethereum: a decentralized application (dapp) does not require any servers or backends and runs independent on a distributed blockchain.

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Want to redirect to react component based on metamask address

I'm building an Identification management dApp, in which I have to redirect to a different component based on selected MetaMask account address. For example, if I'm an applicant then I will be ...
Shorna's user avatar
  • 17
0 votes
1 answer
12 views

Projects you made

Which projects you made that get you to expert level in solidity? I'm trying to be a smart contract dev. with solidity and wanna see which ones you made so I could benefit from it.
seojunchian's user avatar
0 votes
1 answer
26 views

Can't get the stored data from blockchain

I am builing a simple crud dapp . Where I am adding user name ,email , gender ,functionality to blockchain . This dapp has 4 function Create ,update ,delete ,getting Userlist . All the three functions ...
Shorna's user avatar
  • 17
0 votes
0 answers
29 views

Cant see array values inside struct when I returned

/******************** STRUCT ********************/ struct TwentyOneContest { address creator; uint256 rank; uint256 enterPrice; uint256 collectedPrice; ...
seojunchian's user avatar
0 votes
0 answers
25 views

Informations about DApp, Node and much more

I wanted to ask you for an advice, because I am a begginer regardin DApss/Nodes, etc. Your help would me a lot appreciated and thank you in advance for it. In my Trust Wallet, at "Discover" (...
Chris Schneider's user avatar
-1 votes
0 answers
12 views

Cloning a live dApp (_Next/Static + WebPack) (Will Give Reward)

I'm hoping someone could help me out with some answers or simply anything. There are a few sites that are all very similar, they also have very similar sources. My end goal is to "clone" or ...
DevJimmy's user avatar
0 votes
1 answer
30 views

TotalSupply of token not showing

Trying to practice web3, I want to show the total supply of ERC20 token by making a frontend. Please help ! import React, { useState, useEffect } from 'react'; import Web3 from 'web3'; import erc20ABI ...
Asad Arslan's user avatar
0 votes
0 answers
20 views

How can I create new accounts and interact with the blockchain using Ganache (or other testnets)?

I am developing an Android app with kotlin and I want to create new accounts in the blockchain. I am using Ganache as a testnet. I am creating a new Bip32ECKeyPair for every user in the app and I want ...
Nacho's user avatar
  • 1
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0 answers
6 views

Scripts directory not installed

I am creating a smart contract where I have to run the script directory. But even after installing all the dependencies the directory is not getting added to the root folder.
Shravani Sawant's user avatar
0 votes
1 answer
13 views

How to send a request for eth to a user that they can confirm with their metamask wallet?

I am trying to build a Dapp that relies on this functionality. A user will request another user for some eth, and the sender would then see a pop up notification on their wallet ex Metamask or some ...
bot_one's user avatar
0 votes
1 answer
35 views

How can i connect okx wallet (web3-react v6)?

I am still using web3-reactv6, and I want to use both MetaMask and OKX wallets in my Dapp. However, I am using the Injected connector for both, so I am currently unable to distinguish between them. ...
lucia's user avatar
  • 1
0 votes
0 answers
19 views

why the error is not checked in Hex2Bytes of bytes.go?

https://github.com/ethereum/go-ethereum/blob/master/common/bytes.go I am looking at the following codes https://github.com/ethereum/go-ethereum/blob/a3829178af6cec64d6def9131b9340a3328cc4fc/common/...
ak tech's user avatar
0 votes
0 answers
30 views

Anyone know if this 'dapps resolver' site is safe to connect wallet to?

Does anyone know if this is a legit site or not? https://prodigyf.my.canva.site/dappsresolver I'm trying to send dogecoin from BNB network to doge network in metamask so I can buy Omnom. When I put ...
Felicity Massey's user avatar
1 vote
1 answer
21 views

Running a Cryptocurrency Bot 24/7 Without a Computer

I've developed a cryptocurrency trading bot, but I don't want to leave my personal computer running all the time just to keep it operational. Is there a method or service that allows me to run the bot ...
adam mr's user avatar
  • 121
1 vote
0 answers
14 views

Need to perform self destruct contract

I have been involved in a scam and need to get my funds transfered to another wallet in my name. I assume there is a contract preventing send capability, so I need someone who knows how to perform a ...
Val's user avatar
  • 11
0 votes
1 answer
25 views

Decentralised investment contract for a centralised SAAS app

Context After having written a proof-of-concept of a closed-source java SAAS app, I would like to raise a "relatively" small investment to refactor the code-base to allow the scope of the ...
a.t.'s user avatar
  • 67
0 votes
1 answer
13 views

Identity managment on Ethereum Blockchain for e voting system

I'm writing proposal for my final year project. The title is E-voting system using Ethereum Blockchain. There is a problem i don't know how to address. What if i want to use data to authorize voter ...
MIAN AKHLAQ's user avatar
0 votes
2 answers
26 views

Can ERC-20 tokens be used in a smart contract?

All of the dApps I’ve seen and used so far only accept ethereum as a payment. Is it possible for dApps (not including the token’s smart conract) to use ERC-20 tokens?
11111's user avatar
  • 101
2 votes
1 answer
117 views

Why does a wallet user need to sign a message to login?

We all know how Ethereum signing works for user authentication. MetaMask asks you to sign, you sign it and application's server validates it and, if true, allows you to use services. Assume that in my ...
Neo's user avatar
  • 103
1 vote
0 answers
37 views

Proxy Smart Contracts

I am working on a KYC smart contract and I want to provide the upgradable feature so I can add more functions or add more fields to the struct in the future. I have learned about proxies and the way I ...
mno3at l منو3ات's user avatar
0 votes
0 answers
11 views

Dapp architecture & ERC1155

There are 2 smart contracts: Contract Game and Contract Token(ERC1155). I have 2 implementation options: Make the inheritance contract Game is Token {} and work with the token directly or Game ...
MetaverseM4ster's user avatar
6 votes
1 answer
82 views

Why is it called “quadratic” voting?

What’s “quadratic” about it? Do the votes somehow exhibit “multiplicative” behavior, relative to one another (since each person must subdivide their votes, so the final tally is more like ratios or ...
Julius Hamilton's user avatar
0 votes
0 answers
13 views

while executing transaction on Bitfinity Testnet RPC Error: Internal JSON-RPC error

The error VM278:1 MetaMask - RPC Error: Internal JSON-RPC error. {code: -32603, message: 'Internal JSON-RPC error.', data: {…}} code : -32603 data : {code: -32015, message: 'internal error: the ...
Kartik Bankar's user avatar
0 votes
0 answers
19 views

Objects are not valid as a React child (found: [object Promise]). I'm getting an error while showing the current account address on the frontend

I'm building a buy me coffee dapp. Why am I getting error in line 63 I want to show the current account address on the frontend but getting error . What is the error here? How do I solve this? ...
Nandini Jaiswal's user avatar
1 vote
0 answers
19 views

Error when calling a function inside contract

I have a simple contract for getting a greeting and changing the greeting message. I am getting this error when calling the getGreeting function. error: Error: call revert exception (method="...
stepsl's user avatar
  • 11
1 vote
1 answer
36 views

How to create a smart contract for game entry?

I am fairly new to smart contracts, and my team currently creating a game to collect entry fees of 0.01 ETH. Initially was going to let people transfer 0.01 ETH to our main wallet address, and have a ...
smbl's user avatar
  • 111
0 votes
2 answers
228 views

Connecting to MetaMask using Web3.js: Web3.givenProvider vs window.ethereum

I am currently attempting to programmatically connect to MetaMask using Web3.js. I am following the Getting Started guide (https://web3js.readthedocs.io/en/v3.0.0-rc.5/getting-started.html), and the ...
Dawid's user avatar
  • 141
0 votes
0 answers
5 views

Gnosis Safe App Metrics

Is there a way to get the metrics on the volume of transactions that are used through the gnosis apps? Specifically curious about ETH staking platforms such as lido if possible.
Jozef Vogel's user avatar
0 votes
2 answers
42 views

Web3 Could not find name 'Web3'. Did you mean 'web3'

My code works but I am getting this with Web3 dotted. Could not find name 'Web3'. Did you mean 'web3'? const web3 = new Web3(Web3.givenProvider || infuraUrl); When I try to fix it by doing this: ...
trox's user avatar
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0 votes
1 answer
28 views

Swap, usdt to usdc, eth to usdt, eth to usdc etc

Can someone explain how to swap, usdt to usdc, eth to usdt, eth to usdc etc. Without any third-party (uniswap, 1inch etc). In language java/kotlin. For mobile wallet an application
Insan's user avatar
  • 1
1 vote
2 answers
395 views

Foundry or Hardhat: I'm really confused about which one should I use?

Hello everyone I'm new in the smart contract and Dapp development and I'm so confused about choosing a framework. my questions are dumb but I couldn't find the answers by myself. Here is my problem: I ...
emtothed's user avatar
0 votes
1 answer
43 views

Why has the Safe{WALLET} dapp iframe an outer scrollbar?

Just integrated the Safe{WALLET} with the XPowermine.com dapp and noticed that the <iframe> on the desktop has this extra scrollbar on the right hand side. Further, since the dapp has its own ...
Hasan Karahan's user avatar
0 votes
1 answer
25 views

React (opts:) not working, am i missing dependency?

I have a basic walletconnect web3 module here. I am following a video from https://www.youtube.com/watch?v=L65gP0cGC30 but it errors (opts:) on the example video the text actually is grayed out so it ...
Jim Mike's user avatar
0 votes
0 answers
42 views

React Dapp, Wont notify user after successful TX

This is my "Test" dapp which i am building, i am struggling to call an event handler to check if the user has approved spending on a certain contract, in this case USDt ...
Jim Mike's user avatar
0 votes
2 answers
176 views

Callback After Dapp Approval

I have had a contract made for me, and a dapp set up by a developer. My question is how can i produce an event on my website when the user has approved spend of a certain token? Can i use a javascript ...
Jim Mike's user avatar
1 vote
1 answer
79 views

Metamask getBalance method doesnt work

When I wanted show my eth balance in my web site it gives me this "0x103cf17cc1518eb4" how can i turn into string?
seojunchian's user avatar
1 vote
0 answers
33 views

How to inspect MetaMask

I was wondering how can I listen to the requests & data that are being sent between the MetaMask extension & DApp, My purpose is to inspect how is MetaMask reacting to DApp requests so that I ...
Reza Aslejeddian's user avatar
1 vote
0 answers
19 views

truffle migration error

this is the truffle-config.js file: const path = require("path"); module.exports = { // See <http://truffleframework.com/docs/advanced/configuration> // to customize your Truffle ...
ps0's user avatar
  • 11
0 votes
1 answer
17 views

I have enabled a smart contract with transferfrom - Getting GAS error

Any advice on where to start looking for my error?
Jim Mike's user avatar
0 votes
0 answers
36 views

Can someone help me embed this crypto calculator on my website?

I am trying to copy this calculator - https://plasbit.com/widgets - into my website and it does not show on my site. Please help me.
regularcryptotrader45's user avatar
0 votes
1 answer
18 views

Feasibility of implementing a Decentralized Identity Management System? (DIDs and VCs)

I am currently working on a project focused on creating a Decentralized Identity Management System by using DIDs and VCs. Our goal is to enable users to have self-sovereign control over their ...
Ruppy's user avatar
  • 1
0 votes
1 answer
81 views

How to make contract transactions with Web3.py

I am getting error while deploying smart contracts with web3.py. The error says "web3.exceptions.ContractLogicError: execution reverted: VM Exception while processing transaction: invalid opcode&...
Narayan Khatri's user avatar
0 votes
1 answer
56 views

What is the method to be able to use the mobile metamask app as a support for mobile chrome?

So this one is incredibly hard to search for because it returns so many generic posts about how to install MetaMask on a chrome browser and various other things. My query is about how many dapps are ...
HAT0ken's user avatar
0 votes
0 answers
9 views

NFT based webapp - Best architecture approach to render data to the front more agile

I am building a book marketplace where each different book launch a limited series of N copies. Therefore for each book I create an ERC-721 contract with a totalSupply = N. In each ERC-721 contract I ...
gilvictor's user avatar
0 votes
0 answers
18 views

Connecting to a private Blockchain via a Dapp

How can I choose an a node to randomly connect to on the cluster? I can already connect my Dapp to the private node. But what happens in case that node is not available or a different node is more ...
Divyya's user avatar
  • 31
1 vote
0 answers
13 views

Would a circuit breaker feature always execute one block after the trigger is detected?

Lets say I had a Dapp that used a popular stablecoin whereby the stablecoin had a freeze function. Then say I wanted to detect if the stablecoin accounts were frozen and then circuit break the Dapp. ...
zunior's user avatar
  • 1,312
1 vote
0 answers
15 views

Are there any way to pay transaction cost from a hardware wallet when deploying contract using ethers.js?

I am working on developing Dapp and facing a challenge. ▶ Thing I want to achieve ◀ I'd like to create a new wallet instance, then when deploying a contract, I want to pay transaction costs from a ...
smy's user avatar
  • 11
1 vote
1 answer
124 views

mint NFT for contract address. it is possible to mint nft by passing contract address?

we have 2 contracts which is deployed on Bsc network. the first contract is NFT Contract and the second one is Gataway contract were we accept payment and currency swaps Please find below code Nft ...
Harish Manthurthi's user avatar
0 votes
0 answers
37 views

Not able to relay meta transactions to Biconomy's relayer

When I try to send signed transactions, the transactions are successful but from my personal Account and not Biconomy!! I'm using Web3 + Personal Sign custom implementation on a basic ERC20 token ...
Pankaj Jagtap's user avatar
1 vote
0 answers
16 views

Fleek CLI Error: "No api key found" despite FLEEK_API_KEY being set in .env file

I am currently working on hosting a Next.js app for an NFT marketplace on IPFS using Fleek. I've followed the steps to install the Fleek CLI using npm i -g @fleekhq/cli, built the app with npm run ...
Web3Phoenix's user avatar

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