A decentralized application (Dapp, dApp or DApp) is an application that is run by many users on a decentralized network with trustless protocols.
Questions tagged [decentralized-applications]
259 questions
0
votes
1 answer
How do I access a plain Ether transaction event in a Solidity Ethereum smart contract dApp?
When a user sends some Ether to a smart contract/dApp address, is there a way I can access that transaction in my smart contract? Like a built-in method that's invoked, that I can add some code to?
My ideal work flow, if it's possible:
User sends…
pjlangley
- 364
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- 10
0
votes
1 answer
TypeError: ethers.Contract is not a constructor
I am using ethersjs library to create a contract.
I used the following line:
contract = new ethers.Contract(address, ERC20_ABI, provider);
it has worked in the past always but now I am getting the following error:
TypeError: ethers.Contract is not…
Muhammad Fahad Saeed
- 11
- 1
0
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1 answer
How to convert mnemonic to 32 byte seed?
I have a 24-word mnemonic, and I want to convert it to public and private keys.
This is how I did it:
const hex = HexCoder.instance;
final seed = bip39.mnemonicToSeedHex(_mnmonic);
final algorithm = Ed25519();
// The hex.decode(seed) have…
Hossein Yousefpour
- 3,827
- 3
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0
votes
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How do I add a custom wallet (cdc defi wallet) to web3modal
I am developing a dapp and am using web3modal to handle the wallet connecting. Metamask shows up by default and WalletConnect is also easy to implement since it's a package easily available for web3modal.
The CDC Defi Wallet however is proving to be…
Niz
- 11
- 2
0
votes
1 answer
Moralis Login Using Metamask Problem (Decentralized Application)
I'm working on creating a dApp using Moralis framework.
The website is very simple.. I created the html for the login page
login.html
Mora Lynn
- 11
- 2
0
votes
1 answer
Is there a way to write a custom react hook that can injected into a component?
I have a project that runs when using npm run dev which is next dev in the package.json file since we use the React framework Next.js. When I run npm run build or next build there are multiple errors surrounding React Hooks.
Example error in npm run…
Matt Blackert
- 25
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0
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1 answer
React/Typescript error when adding promise to a function?
I am using the following function from useWagmi to write a transaction to an ethereum contract: https://wagmi.sh/docs/hooks/useContractWrite
const [{ data, error, loading }, write] = useContractWrite(
{
addressOrName: 'Address',
…
kalculated
- 299
- 4
- 19
0
votes
1 answer
Change dapp gateway
How can I change the elrond dapp gateway? I want to use tatum.io in exchange of gateway.elrond.com but with the elrond dapp template https://github.com/ElrondNetwork/dapp-template I don't know how to do it!
paulv
- 83
- 2
- 12
0
votes
1 answer
Why msg.sender has the address of the deployer (address isnt the caller)
I'm currently developing on a simple Naming Service for the Ethereum Blockchain.
msg.sender has the address of the deployer from the contract and not from the caller.
address public caller;
constructor() {
caller = msg.sender;
…
zerokamix
- 23
- 2
0
votes
1 answer
Solana web3 js keep gives Cannot read properties of undefined (reading 'negative') while trying to confirm transaction
I'm trying to sign a transaction with connected user's wallet, through phantom but I keep getting this error message
Cannot read properties of undefined (reading 'negative')
below is my transaction function
async SendTransaction(from,to){
…
Cyberhero
- 32
- 6
0
votes
1 answer
ContractObj not found in JavaScript
$(document).ready(function(){
web3c = new Web3(ethereum);
const contractAddress="0x6eACA1A0406Def265a1ccbb193e09DA4Fd93635D";
const contractABI= [
{
"inputs": [
{
"internalType": "string",
"name": "messageData",
"type":…
Lekshmi
- 11
- 1
0
votes
1 answer
How to define listener argument for provider.on(eventName, listener) for listening a smart contract event with ethers.js?
I was following this quick guide to build a Dapp.
In order to build the user interface and interact with the smart contract, it uses React. There are the functions below:
async function submitBid(event) {
event.preventDefault();
if (typeof…
0x55b1E06FF
- 538
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- 24
0
votes
1 answer
Why does my console say Truffle(ganache) instead of Truffle(develop)
I'm trying to follow a truffle tutorial and getting stuck. I have made a basic contract and migration script and done the truffle compile and truffle migrate.
After this in the tutorials, the command line says "truffle(develop)" whereas mine says…
Epaulson2
- 19
- 2
0
votes
1 answer
Issues with missing ")" after argument list in truffle testing
I am trying to test a solidity contract using truffle test suite and I am unable to fix my code. The error reads " Issues with missing ")" after argument list in truffle testing.". I'd greatly appreciate any feedback or help as I have pretty much…
Luckthedev
- 1
- 2
0
votes
1 answer
Trying to Start React-native with Expo - Tried to register two views with same name RNSVGRect
I was trying to build a React-native dapp using the starter template provided by
npx create-react-native-dapp
I tried to run it, works fine in the web but when scanning the Expo QR it throws an error
Invariant Violation: Tried to register two…
Prakhar
- 11
- 4