Questions tagged [ethereum-wallet-dapp]
Tag for the questions related to the deployment of the contracts using Ethereum wallet.
720
questions
0
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6 views
How to use Exit function on this smart contract in solidity?
This is on Tron but its a pure solidity openzeppelin code so I assume this is the right place to look.
https://tronscan.org/#/contract/TEzjbwwYda6WMQAQ8p7GoXq4W3Xo532KJj/code
I want to use EXIT ...
-2
votes
0answers
23 views
BUILDING AN ETHEREUM SMARTCONTRACT TO INTERACT WITH EXTERNALLY OWNED WALLET LIKE ETH, BNB, LTC, USDC, ETC [closed]
After I built an escrow smart contract with solidity how do I use Ethereum, Bitcoin, and LTC wallet, USDC to interact with it?
cause I feel they are all blockchain. I will appreciate ideas and a ...
1
vote
1answer
18 views
When calling ERC-20 token transfer() method nothing happens
I'm currently using version 1.2.9 and Using Infura Rinkeby as Provider. So basically I'm building a node application with Inbuilt wallet. Now I have successfully Created an Account and Used that ...
1
vote
1answer
33 views
Can someone help me figure out how to get my UNI from an old MCD vault?
So here's my problem:
My UNI drop was sent to and outdated instadapp mcd vault at contract address: 0xc653461d3D4c6AD53c16ebE16fa07f820e115139 which i am the owner of at address: ...
0
votes
1answer
19 views
Withdrawing ETH from Contract fails
Trying to write a quick function to withdraw ETH from my contract - it's not working.
Here's the code:
function withdrawEntireBalance() payable external {
require(msg.sender == contractOwner, &...
0
votes
1answer
9 views
i have WETH in my ETH wallet but i can't send it
As you see, I have 1.7 WETH. When I try to withdraw, it shows me this
[![enter image description here][1]][1]
[1]: https://i.stack.imgur.com/XHQjq.jpg!
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0answers
21 views
How to make web3Modal dapp compatible to coinbase browser?
I have made my dapp compatible with web3Modal. The dapp is using simple Html/css/js. It is working fine with metamask desktop, metamask mobile and wallet connect but when I try to browse it from ...
0
votes
1answer
31 views
why does ERC20 Token Balance shows 0 frequently?
I have a DAPP and ERC20 Token which has an initial supply of 9000 for testing purpose..First step is to login/register into the DAPP where all the information resides..There is an element in the DAPP ...
0
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0answers
11 views
Metamask mobile app
From our custom mobile app, we would like to allow users to connect to Metamask and fetch their Ethereum account address(after their consent). For this, we need to navigate user from our mobile app to ...
4
votes
2answers
57 views
Is there any c++ library for signing transactions?
I am working on light wallet in c++, and I am looking for a c++ library for signing transactions. I mean something where i will pass transaction and private key and it will return signed transaction ...
0
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0answers
22 views
web3.js convert hex value to string [duplicate]
I use web3.js to read all events and I get the return values when convert this field to original string (string indexed name) original name like mmmm the hex retrund is ("...
0
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0answers
13 views
How to handle refer by register functionality in Dapp with Smart Contract? [duplicate]
I've just started to learn solidity programming..Firstly, I have a register page, in which the metamask opens up an popup and connect the user address to my dapp by registering the user on their ...
0
votes
1answer
25 views
Sending ether directly from metamask to fallback function
I want to send some amount of ether to a smart contract from metamask (without using web3) and want it to perform some specific tasks based on that amount. For example, if I send 0.9 ether, I want it ...
0
votes
1answer
36 views
Cannot set property 'defaultAccount' of undefined
I am trying to run a DApp with metamask enabled , but this error surfaces .
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-...
0
votes
0answers
18 views
Problem with deposit public payable
with this code not possible deposit. I don't get any special error, only:
id:6449ed342beaee3b82363f7ecafd8fead18e6bcc3c3ace01db679a48210ea403resMessage:REVERT opcode executed
but from shasta account I ...
0
votes
0answers
18 views
Only see the last item of struct using for loop in web3.js
I don't understand what mistake I did in my code. I created a folder before and I was successfully see the correct result of smart contract. For more clarify ,
Actually I want to see the struct result ...
0
votes
0answers
27 views
Restoring a mnemonic seed with one missing word
I wrote my seed with one missing word (do not know exact position).
Do you know any tool for recovering ethereum wallet? I found this one, bus its for monero. https://github.com/amustafa/recovering-...
2
votes
1answer
40 views
Problem In Getting Rinkeby Test Ethers
I tried to get rinkeby ethers from https://faucet.rinkeby.io/ by creating a tweet but the website shows "insufficient funds for gas * price + value” error. I also tried the website faucets....
0
votes
1answer
16 views
How I compile dapp in browser just like I used to compile my Visual Studio code using xampp in my browser?
Whenever I create/ edit some project on my Visual studio code, I put it inside htdocs of xampp folder. Then I start Xampp control panel and give it some localhost port number so that I would compile ...
0
votes
1answer
9 views
When an Ethereum transaction event occurs, is there a case when it was not included in the main chain later due to a fork?
I know Ethereum is a POW blockchain where forks take place.
The transaction event is issued after executing the transaction on the node. If a fork occurs, is there a possibility that the transaction ...
0
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0answers
8 views
How to show token balance from a ETH address in my Android App?
I have an Android App and I want to show the balance of an especific token of the user wallet Address
IE: show how many CHAINLINK are holding the user on his wallet
Thanks in advance
0
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0answers
55 views
Ethereum geth mainnet blocked on “Looking for peers”
I installed Geth for setup a ethereum node on my linux server and use it on my RPC API.
The problem is, Geth is posting "Looking for peers" forever, I don't really understand why. This is ...
0
votes
0answers
12 views
User login in ethereum based voting dapp
I am trying to build an ethereum based voting DAPP for my university project. My proposed system is for the university club and society elections. I am using ganache cli, truffle framework and node js ...
0
votes
1answer
25 views
how come i can generate keys using bip39 with only one words as seedphrase/mnemonic without any error?
Seed phrase/mnemonic is supposed to be 12 words or 24 words but I am able to generate keys with single word seed phrase using bip39 library without any error? what is happening here? how is this ...
0
votes
1answer
16 views
Does Ethereum 2.0 have privacy on state variables?
I know in 1.x state values were visible to anyone on the network. With the release of 2.0, is there still no privacy? Also I understand 2.0 is being released in phases. Is there a timetable with the ...
0
votes
1answer
44 views
buyTokens throws error when is is getting called
Whenever I the buyTokens function is getting executed, I am getting below error
Reason provided by the contract: "ERC20: transfer amount exceeds allowance". Debug the transaction to get more ...
0
votes
0answers
14 views
any one please help when show QR for receiving erc20 token
any one please help when show QR for receiving erc20 token can i enter amount like "ethereum:ethaddress?address=contractaddress&uint256=token" not working
"ethereum:...
0
votes
1answer
23 views
Can not Open Ethereum Wallet on Window 10
I did trying install soft Ethereum wallet on windows 10, But I can't open the program. It looks like the picture below. Help me pls, Thank everyone.
0
votes
1answer
13 views
Eth address created from an outdated version of MEW off line
Hello I have MEW off line client 3.7 (2018 version) on an airgapped computer
Since the new client doesn't let me create new ethereum wallets offline (it blocks itself (idle) while creating it) can I ...
0
votes
1answer
19 views
tokenMock.mint is not a function(tokenMock is the deployed Smart Contract)
I am creating a new Blockchain wallet with ERC20,but during migration,i am getting the error that tokenMock.mint is not a function(tokenMock is the deployed contract)
I am sending the tokens to my ...
0
votes
1answer
189 views
“Migrations” — sender account not recognized
This is my truffle.js i've removed the credentials marked as *
var HDWalletProvider = require('@truffle/hdwallet-provider');
var fs = require('fs');
var infura_apikey = "*"
var mnemonic = &...
0
votes
1answer
12 views
how to create an address or wallet in several tokens
Hello community I am using nodejs and web3, I would like to know if it is possible to create an address in each token and then bring the corresponding balance of each token
0
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0answers
88 views
public token swap contract
i want to create an erc20 token swap contract for a crowdsale im building right now. and i dont want to accept ether, i prefer USDT. i found a swap contract example on the internet but it always asks ...
0
votes
1answer
34 views
Which method is efficient to log data in blockchain? Send an event via smart contract or send data in a transaction without value?
I want to log data in Ethereum block-chain. It is obvious that we can create a smart contract that emits events and retrieve data from it.
But is sending a transaction with data but no ETH value (just ...
0
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0answers
158 views
How to debug this metamsk error ? - Error: [ethjs-rpc] rpc error with payload:
I have a DApp integrated with metamask and ganache, front-end built on react. I am getting this error when I interact with the smart contract from front-end, contract send calls. Smart contract ...
-1
votes
1answer
24 views
i can't figure out why i keep getting this parser error
pragma solidity ^0.5.13;
contract WorkingWithVariables {
uint256 public myUint
function setMyUint(uint_myUint) public {
myUint = _myUint;
}
bool public mybool;
...
0
votes
1answer
41 views
My Transaction has failed [closed]
I have transferred 0.11 ethereum to wallet today morning
0x5acc84a3e955Bdd76467d3348077d003f00fFB97
But it has failed. Now what i have to do. Whether the amount will be returned back to my wallet.
...
1
vote
1answer
107 views
Sign Function of web3.js for Authenticating users via MetaMask
I am trying to follow the example found at this site in order to authenticate users using the MetaMask functionality. Furthermore, the web3.js documentation at the following site, specifies this sign ...
0
votes
1answer
104 views
Compilation Error
Hi guys I got this error when I try to compile using truffle develop.
truffle(develop)> compile
Compiling your contracts...
Compiling ./contracts/StarNotary.sol
/mnt/d/Blockchain/...
1
vote
1answer
17 views
Security of Exclusively using MetaMask's Account as a Login Process
I am currently developing a Dapp in vue.js/node.js which will use MetaMask to interact with the Ethereum Network. I have the following code implemented in a JavaScript module.
import web3 from 'web3';...
0
votes
1answer
46 views
How can we lock ETH in user wallet without escrow contract?
I know the logic of using an escrow contract in which 2 or more users send their wagered ETH to a smart contract acting as escrow proxy, and then after some decision contract executes we release the ...
0
votes
0answers
47 views
Getting an “ Unhandled promise rejection” error when making transaction from account1 to a contract
I keep getting a Promise Rejection error whenever I make a transaction from account 1 to a contract. The contract is used to send ether to account 2 when it receives ether from account 1. For security ...
1
vote
0answers
23 views
where to host express api that communicates with smart contract to be fully decentralised?
I need to host express api that communicates with smart contract to be fully decentralised. Any to host it decentralised.
0
votes
1answer
75 views
Fundamental question! (HD Wallet private key hacked) [closed]
What is the probability of the mnemonic or privatekey of the HD wallet being hacked?
It is being used as a wallet created by metamask.
The user is using a wallet with a private key backed up by ...
0
votes
1answer
20 views
Different kind of Wallet/Addresses/Accounts
I have a few questions regarding crypto wallet accounts and currencies.
Recently I came across https://www.bitaddress.org/. This website generates bitcoin wallets. Now, when I tried to verify that ...
0
votes
0answers
13 views
I’m trying to build a versioning System using IPLD and IPFS .Is it possible to publish hashes from multiple users to the same IPLD object?
I’m using Ipfs-api from Infura for interaction .I’m able to create and upload files to the Ipld object .I want to store different versions of the same file on the object.These versions can be ...
0
votes
0answers
13 views
Writing a function, where users are allowed to deposit their token
i want to create a smart-contract, where it is allowed for users to deposit their ether/tokens in.
As far i researched i found this function to get it happen.
address owner; // this is where you ...
0
votes
1answer
75 views
Gnosis Wallet - Multisig not really working as multisig
I'm trying to create a MultiSig wallet for both ETH and ERC20. After doing some research, I found Gnosis, which seemed to fill my need.
First I tried to download the local (electron-based) version. ...
0
votes
0answers
21 views
In EtherJs how to find account number of balance change event?
I am creating Ethereum Wallet application & I am using EtherJs for Web wallet development. When I try to listen for Balance Change event for multiple accounts then How do I find account number ...
0
votes
1answer
46 views
Ethereum stores its own data, how to synchronize the data to other nodes in the future
I use smart contracts in Ethereum to store some string data, how to synchronize these stored string data to other nodes.
As far as I know, these string data are stored in the node's leveldb database, ...
