Questions tagged [ethereum-wallet-dapp]

Tag for the questions related to the deployment of the contracts using Ethereum wallet.

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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:...
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2answers
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How can I change the 12 word phrase in my trust wallet?

I created a ETH trust wallet on my phone for someone and he has now imported the trust wallet to his phone. Is there any way to change the 12 word phrase or somehow give the sole control to the ...
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Can you store anything other than Eth in one wallet

Total newbie to blockchain. I want to use ethereum to store information and not so much currency. For example, I want to create a game where I can store someones point. Can the wallet address store ...
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1answer
10 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.
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1answer
41 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/...
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1answer
51 views

how to be notified about incoming transactions instantly?

I'm creating a platform which users are able to receive ETH on their own wallets (addresses). They will give the addresses to others, but the question is how can I be notified that new transactions ...
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2answers
157 views

When I recreate an Account using a Mnemonic, will it also bring back its private key?

I guess my Question is straight-forward, I would like to know if using a Mnemonic to recreate or import an Ethereum (external) Account will actually make or "bring back" the whole KeyPair (public and ...
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1answer
10 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Eth address created from an outdated version of MEW off line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 ...
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2answers
34 views

Compilation error in ethereum wallet

I am trying to compile the example contract in https://ethereum.org/token and following along with the instructions. The Ethereum wallet cannot compile it though. I get the following error message ...
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1answer
52 views

interact with a smart contract without having a wallet

I have a smart contract that basically store a document and I integrated it with a user interface that let the user go to the website and search for that document .. very simple idea. I want to let ...
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1answer
14 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 ...
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2answers
174 views

app.vote(1, {from: web3.eth.accounts[0] }) not working

I am following a tutorial from Dapp University about building Election Smart Contract. When I run this command in the console: app.vote(1, {from: web3.eth.accounts[0] }) I get the following error: ...
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1answer
35 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 = &...
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1answer
9 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
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1answer
26 views

How do I develope a QR code for a 64 character hex string generated ethereum address?

I am learning about how the 64 character hex string generated Eth Address is formed. Is there a program for this?
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2answers
84 views

Blochchain Smart Contract App

Actually Im working on a blockchain application based on smart contracts that allows to buy/sell properties and paying in cryptocurrency using Ethereum and Bitcoin. I wonder I develop smart contract ...
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1answer
38 views

remix compiler warning infinite gas requirement

I'm trying to deploy a trivial faucet program which compiles OK with remix but I get the following error. "Gas requirement of function Faucet.withdraw(uint256) high: infinite. " This means that while ...
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1answer
80 views

How to handle exceptions in ethreum private network using revert(),throw

I am running a private ethereum network using geth --rpc --rpccorsdomain "*" --datadir ./chaindata --port "30330" --nodiscover --rpcapi "db,th,net,web3" --networkid 2010 init genesis.json and ...
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0answers
24 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 ...
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2answers
37 views

Connect dApp hosted on cloud with Geth running locally

I've my dApp running on AWS and Geth running locally. How am I supposed to connect my hosted dApp with the Geth? I'm connecting my web3(using web3.py) using my computer's(Windows OS) IP address. ...
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1answer
72 views

How to create withdraw token requests on my custom token sale dashboard

I created a token sale dashboard. Users can send BTC,LTC,ETH to dashboard. When user send BTC, LTC or ETH to dashboard, they get tokens to their dashboard budget (offchain) based on current token ...
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3answers
76 views

How to do transaction on a dapp without any wallet

I am able to do a transation in my private nework using geth console. But I want to the transaction on a dapp without using any wallet
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1answer
63 views

Ethereum Smart Contract with Custom Fee and Percentage of the collected Fee Distrusted token holder

I wanted to know is there a possibility to create a smart contract for a token wherein the transaction fee could be overridden with the network fee and the fee collected on the transaction can be ...
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1answer
52 views

Can you transfer money from a smart contract to an eth address without writing code?

I have an ethereum contract, which linked to a wallet that I control (i.e. I have the private key). The contract has 241 Ether in it. Is there an easy tool available to get the ether out of the ...
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1answer
81 views

retrieving tokens from contract

I am using the MyAdvancedToken code from: https://www.ethereum.org/token I transferred tokens from owner account into the contract, to fund any buy(). Now, I want those tokens back. Is there any ...
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1answer
58 views

How to have users sign transactions on an ethereum based platform without giving up their Private Keys to the platform?

How to have users sign transactions on an ethereum based platform without surrendering their Private Keys to the platform? Need the process to be automated, while users not giving up their private ...
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1answer
334 views

To handle emitted events from solidity in javascript in truffle suite

The function I am accessing will emit events i need to use that event but the function is a transaction when i am accessing the event it turns as promise pending . So suggest me some methods. thanks! ...
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1answer
79 views

How to call a payble function in embark? When I am trying it is showing gas limit exceeds

when I am trying to call payble function in embark it is showing gas limit exceeds. Please tell me where I am wrong? ///////////////// Index.js: $('#buy button').click(function() { ...
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1answer
32 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, ...
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1answer
83 views

How to kill a contract in ethereum?

I'm trying to kill this contract /** *Submitted for verification at Etherscan.io on 2016-08-31 */ //sol Wallet // Multi-sig, daily-limited account proxy/wallet. // @authors: // Gav Wood <g@...
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1answer
26 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 ...
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38 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 ...
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1answer
74 views

How to customize/modify the default startup url in Mist brwoser for ERC20 tokens on Ethereum?

Hi I am making an ICO wallet. I know Mist browser(https://github.com/ethereum/mist) has a lightweight version coming up soon and ConsenSys(https://github.com/ConsenSys/eth-lightwallet) has one, but I ...
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1answer
306 views

Ledger nano s unrecoverable - have ethereum private keys - How do I get this ETH?

Lost the 24 word recovery sheet, and the pin number... I"ve resolved that the BTC is gone, but if I opened in myetherwallet - and produced private key and UPC code - I'm told I could get the ETH ...
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1answer
87 views

(error_10) Please enter a valid data value (Must be hex.)MyEther Wallet

im trying to deploy smart contract on Myteherwallet but geting an error while deploying byte code of smart contact which is written in solidity remix IDE I have even tried to change the object byte ...
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1answer
74 views

Which one of methods should I choose for deployment of smart contract geth or a wallet if I have to build API for smart contracts in nodejs?

I'm having trouble to understand which method would be better for deployment geth or a wallet if I'm building API in nodejs using web3. Where exactly is the contract stored?? Is the contract ...
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1answer
20 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; ...
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1answer
29 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. ...
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1answer
33 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 ...
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1answer
150 views

Unhandled promise rejection (rejection id: 1): Error: Transaction has been reverted by the EVM:

I don't know where i'm doing mistake. I have deployed my contract through remix and truffle and it was deployed without any mistake but now i'm deploying it from web3 solc@0.4.24 version and EVM is ...
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1answer
383 views

Uncaught Error: CONNECTION ERROR: Couldn't connect to node web3.min.js:1 http://localhost:8545

**Hi, I am doing a sample project on Ethereum where 2 fields ( Emp name, Emp Id) will be taken from the UI and set those values using a smart contract and show the values back to UI. Getting below 2 ...
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1answer
422 views

How can we access private blockchain from another network?

I have private Ethereum network running on my local network with two sealer node and one bootnode. I have deployed the private blockchain and configured it using geth. Now I want to create another ...
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1answer
12 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';...
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1answer
236 views

Infura API for mobile(ionic) app

I have one little question. Suppose I have private key of user in ionic app. Is this enough to make transactions using infura API and web3?
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0answers
29 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 ...
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1answer
70 views

Transferring files over blockchain from ropsten-test network

I am new to blockchain and working on a university project. I am trying to simply buy and sell music over the blockchain. Currently I am using a string to act as the 'transaction', but learnt this ...
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1answer
32 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 ...
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1answer
137 views

Sending Ether from private Geth node to Mist Account

I have Sended Ether from my private geth node to an another account created by metamask. I have choosed custum RPC to metamsk, with the valide IP and Port, Also i have activated rpc in my geth node. ...
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0answers
22 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.
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1answer
95 views

Switched from the Ethereum Wallet's test network to main network and need to remove the previous data

I was on the Ethereum Wallet's test network and finally worked out all the code, but now that I have switched over to the main network I've had to download a lot of the preexisting blocks and has my ...

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