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Questions tagged [ethereum-wallet-dapp]

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

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Ethereum private keys

When I go to the key store folder via Mist I find a .json-file (doesn't have a .json extension, but I believe this is still a .json file) that corresponds with my ether address (UTC blablabla). If I'm ...
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2answers
250 views

host:port for testnet and mainnet

I am testing my Dapp and need host:port for testnet and mainnet. Please can you let me know where can I find these urls? Also, what if the url (host:port) i provide and it goes down?
3
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1answer
149 views

trying to recover funds from an older ethereum wallet

I downloaded an older version of ethereum wallet in march. and transferred some ether to the account. I have not uploaded in a few months but when i turn on wallet, it refuses to download new blocks. ...
3
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3answers
171 views

How do I keep my Ethereum Wallet synchronised after the initial synchronisation

I have successfully installed and synchronised Ethereum Wallet and it has correctly brought in my test Ether purchase. How do I resynchronise to ensure more current transactions are recorded on my ...
3
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1answer
764 views

Not getting Ether on contract wallet

on my Ethereum wallet I've created a contract based wallet (as it was recommended in guides to see details about all my transactions) and I was useing this wallet as my main pay address. Everything ...
3
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2answers
417 views

how to setup a ethereum private blockchain?

Does anyone know how to set up a private blockchain in ethereum network? is that possible to run a private ethereum node? I have seen forking of public blockchain like EOS into a private blockchain.i ...
3
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1answer
188 views

Can we write pure native mobile app that on blockchain

I have a web-based blockchain application. On web, I can use metamask for making transaction. On mobile, I can use some Dapp browser such as Toshi ... But I want to write a native application (pure ...
3
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1answer
620 views

how does exchanges manage user's Ethereum wallets?

I noticed that Binance exchange created an unique address for every user to deposit ERC20 tokens. after the deposit, Binance transfer those tokens to a specific address, which is marked as "Binance"(...
3
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1answer
93 views

Making millions of transactions reliably

I'll explain the situation : I want to log Web2 actions onto a blockchain - say, an access log. On top of that, I'm assuming the content supplied to the browser has passed many hands before reaching ...
3
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1answer
2k views

Ethereum Wallet takes forever to sync every day I open it. Is this practical? [closed]

Does anyone agree that it is impractical to wait so VERY LONG every time I open my Ethereum Wallet and hit has to sync? What's up with that? Solutions?
3
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1answer
403 views

Mist/EthereumWallet error: Method 'eth_sendTransaction' not allowed

I am trying to deploy a smart contract on a private ethereum blockchain and I get this error message "Method 'eth_sendTransaction' not allowed" whenever I try to submit a transaction for sending ether ...
3
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2answers
161 views

Is there any other platform to check contract working?

I am trying from past few days but didn't get test ether to test my own contract...is there any other platform where I can test my contract or can you send me some ether ...
3
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1answer
1k views

Problem verifying source code on Etherscan

This is really annoying I have tried putting in the ABI. Keep getting a constructor error. I have tried many combinations, nothing seems to work. Following is the source code I deployed to Testnet ...
3
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1answer
161 views

Error openning the Ethereum wallet win64 0-8-8 on Windows 10

I'm getting this error when opening the Ethereum Wallet x64 version 0.8.8 on Windows 10: And then I see this window: I don't see any log file, but i see below Information in Windows Event log ...
3
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1answer
397 views

ethereum wallet slowing down entire system (ubuntu 14)

I installed the wallet (0.8.7) on my Mac. Synced within 20 minutes, all good. Trying to do the same on my Ubuntu 14 (on an lenovo x220, with ssd), and it takes ages to sync (not the issue I am ...
3
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1answer
1k views

How to unlock the ethereum contract account?

I installed the package from this link and its working fine. Then I create the one multisig contract. when creating the contract I got one new address. I can deposit that address but for withdraw ...
3
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1answer
91 views

Ethereum Mist wallet 0.8.0 won't receive any payments anymore

Mist would not receive any payments. I have not updated after 0.8.0. Is the reason because I have not done anything to choose which chain I will use?
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0answers
25 views

Ethereum wallet accounts all use same password though I made different ones?

(tech level, beginner) installed wallet version win64-0-11-1 deployed a contract, made a token using the example code on ethereum site. had two accounts in the wallet. used main account to send ...
3
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2answers
775 views

How to use mnemonic to recovery my ethereum wallet

I use web3j to create my ethereum wallet.the Code just like down import org.web3j.crypto.Bip39Wallet; import org.web3j.crypto.Credentials; import org.web3j.crypto.ECKeyPair; import org.web3j.crypto....
3
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0answers
294 views

Ethereum wallet stuck on loading

I have installed Ethereum Wallet and switch it to the Ropsten Testnet after first start, it synced all blocks. After restart I am trying to run it, but it stuck on loading splash. I am on Windows 7, ...
3
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1answer
682 views

ERC223 Token Fallback Function Usage

I'm currently writing the "Trade" smart contract which is similar to "Crowdsale" smart contract. The only function that I want to add is "sell" function. In general Crowdsale smart contract is used ...
3
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1answer
364 views

Creating new account from web3 showing error

while creating new account from angular using web3 personal.newAccount function() undefined import { Injectable } from '@angular/core'; import { User } from './login/user'; const Web3=...
3
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1answer
704 views

DApp sign transactions on mobile and transfer to server - Web security

I'm currently developing an app for iOS and Android using React Native where users will have a wallet, made using: https://www.npmjs.com/package/ethereumjs-wallet-react-native. They then are able to ...
3
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3answers
1k views

how to deploy smart contract in ethereum network using ropsten network?

I have created a smart contract(a standard token smart contract) in solidity and truffle. Now I want to deploy it to ethereum network. I want to use ropsten network because I want to use metamask ...
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2answers
1k views

Call deployed smart contract from web3.js

I have small test smart contract, which is deployed to my test network. And I want to use a server to call the function in the contract. Here is the code: payontime.sol pragma solidity ^0.4.0; ...
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0answers
177 views

Ethereum wallet shows “no accounts yet” and 0.00 balance [duplicate]

I last used Ethereum wallet in June or July this year. Yesterday I upgraded on macOS to 0.8.7. It is syncing very slowly; at this rate it will take a week to finish the remaining 189,000 blocks. In ...
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0answers
124 views

How to enable autobuy of Ethers in exchange of my CryptoCurrency?

I'm referring this page : https://www.ethereum.org/token#automatic-selling-and-buying My question is that how is it possible to integrate third party in our Smart Contracts to be deployed on Ethereum ...
2
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1answer
364 views

Metamask Warning

In an effort to improve user privacy, MetaMask will stop exposing user accounts to dapps by default beginning November 2nd, 2018. Dapps should call provider.enable() in order to view and use accounts. ...
2
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2answers
1k views

How can I make other people's account to do ether transactions with smart contract? [closed]

I was making a smart contract which involves people to buy tokens in exchange of ether they send. It works fine in testrpc as all accounts are unlocked, but how do I do it for actual accounts in main ...
2
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1answer
129 views

Which version of web3 shall i be using now?

I found the documentation of version 1.0.0 which was released on the 6th of August here. I was told that v1 is not stable and very different than earlier versions. But when i check the available ...
2
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2answers
598 views

How to connect with public Ethereum Blockchain on a backend/web server?

In the backend of a Web application I have to communicate with the public Ethereum Blockchain. On local development machine, I run ganache as testrpc and connect with such a line of code: web3 = new ...
2
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1answer
205 views

msg.sender is Null in Base Constructor

When I create the child class object and try to access value of msg.sender from parent class it always comes 0. Can anyone please help me in this? Below is the sample code: contract Test1 is Test2 { ...
2
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3answers
780 views

Can we create multiple private blockchains in a single computer?

I have already created a private blockchain in my system. Now can I create another private blockchain in the same system? I have tried to create one more by changing the chain id in genesis block and ...
2
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1answer
2k views

How to withdraw Ether from a contract

I've been playing with Token contracts, so far so good, however once the Ether is sent and the tokens created, what happens to the Ether? I have some Ether on the contract address, how do I withdraw ...
2
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2answers
415 views

What will happen if 2 cold storage (Ether) generates a same private key

I am new to crypto world trying to understand the Ether wallet generation process with the private key. Let us say 2 person A and B are buying a cold storage device "Ledger Nano S" and setting it up ...
2
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1answer
3k views

Possible to Import wallet from keystore folder? [duplicate]

I have ethereum setup on my ubuntu machine. And i do have the Keystore folder on cold storage. How do I import these wallets?
2
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1answer
468 views

How to generate deterministic keypairs using ed25519

I am trying to implement my wallet using ed25519 curve, i was using tweetnacl from this link "https://github.com/dchest/tweetnacl-js" its working, But i want to generate deterministic key-pair ...
2
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1answer
47 views

How is a contract settled when multiple wallets make the same transaction?

I'll use the DApp, CryptoKitties as an example: Let's say some sweet digital cat is released with a "buy now" button for 1 Ethereum and 3 people make the transaction via MetaMask. All 3 transactions ...
2
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1answer
520 views

Web3 and MetaMask, receiving event from blockchain

Hey guys I'm terribly stuck with getting events to frontend. I'm using MetaMask. what am I missing? Solidity event: event enrolled(address payoutAddress, address sender, uint dateOfTransaction); ...
2
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2answers
489 views

Can't get started with Ethereum wallet

I have downloaded the latest Ethereum wallet and trying to run it. But the wallet is stuck with "Node Connection Error" message. I am working behind a proxy server. Is there anything I need to do ...
2
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2answers
2k views

Mist error: “Could not compile source code”

Image contains the error and code i have written. I have use inheritance in my code.
2
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2answers
159 views

Golang Equivalent to list accounts on node - web3.eth.Accounts()

Does anyone know if its possible to get a list of the accounts on a node using golang, after Dialing to the node, basic PoC would be assuming the accounts are already unlocked via the CLI Basically ...
2
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2answers
230 views

How do I update data for project using blockchain (Ethereum)?

I am very new to creating blockchain dapps, so some guidance would be appreciated. I am conceptualizing how to approach creating a private blockchain so that users can communicate about the status of ...
2
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1answer
10k views

How to extract private keys from Ethereum Wallet? [duplicate]

How to extract private key of an account from Ethereum Wallet on Linux? Please specify the exact filesystem locations. I need private keys both for the main network and for the Ropsten test network.
2
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2answers
538 views

ganache-cli issues: - How to retrive old ganache-cli account once cmd window close

I am using ganache-cli....and it is providing me 10 test accounts with 100ETH balance. when I close that cmd and start ganache-cli it creates new 10 test accounts every time. So how to retrieve my ...
2
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1answer
835 views

how to set msg.value in metamask?

I am using MetaMask chrome extension, for my Dapp. I have a function which needs to transfer some amount to another account. This amount is of the order 200 to 800 wei. How do I set msg.value() ...
2
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1answer
693 views

import sol file from github error: File Nod Found

Hi I have a problem about import sol file from github. I use remix online in remix.ethereum.org. But I can not import the sol file from github and I don't know why?? Can everyone help me? Thank ...
2
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1answer
810 views

Ether wallet IOS app with testnet functionality

I'm trying to find an Ethereum wallet app on the apple app store to test my Dapp's QR code functionality but can't seem to find any wallet apps that support Ropsten. I've tried Ethers as they claim to ...
2
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1answer
904 views

Should I use Infura with Web3j for Event filter?

I'm using Web3j with Infura for smart contract deployment, calling contract method and transactions. Now I want to use Filter contract event from log. Should I use Infura for this? Is Web3j filter ...
2
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1answer
238 views

Does Swarm architecture supports streaming video files

Though the prototypes are less in number, swarm architecture is able to upload picture files (alpha tested in LETH android app).Is Swarm presently equipped to support streaming videos or pre-recorded ...