Questions tagged [ethereum-wallet-dapp]

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

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2answers
796 views

How to create a own ethereum wallet

Is that possible to develop a own ethereum wallet without metamask that should connect to main ethereum network. Just like in blockchain.info user clicks the account by just giving email address and ...
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1answer
147 views

Is it possible to have separate eth receive address with each user

I want to accept ethereum from a crowd for selling something from my webpage. I want each individual to send ethereum on an assigned receive address. Is it possible to assign separate ethereum address ...
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1answer
189 views

Main wallet of an account? [duplicate]

In Solidity there is msg.sender whose value may be used to send Ether to the sender of the msg. How the wallet to send money is chosen when the sender has several Wallets? Is there concept of ...
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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.
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1answer
85 views

Need help with start mining(I am getting like this)

I am new to ethereum private blockchain System information: geth version:1.8.2 os&version:linux synopsis: when i tried to connect peers to my private blockchain it showing like WARN [03-20|11:...
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1answer
62 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
611 views

Can not deposit ether into a contract

I tried to build a basic contract from some resources but failed to deposit the ether into this contract. Following is my code, is it correct that "msg.value" and "address(this).balance" be 0 at any ...
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2answers
541 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 ...
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2answers
48 views

Integrate more then one user with one ethereum account

I have many users inside the organization and I want to use same ethereum account for all the users , but with different usernames, so it there anyway to do that ?
2
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1answer
341 views

Digital asset management dapp using Ethereum

I am new to ethereum and also I have tried out some examples for building smart contract using truffle and ganache. But I want to make Digital asset management dapp using ethereum. Like, if have I ...
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2answers
541 views

Do we have an API for airdrop

I am creating an news app which will show the ICO and Airdrop details. Is there is any API for Airdrop news ?
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1answer
277 views

how to import UTC-JSON file through web3-eth methods

hey I am working on ethereum wallet. in this i want to import my account through UTC json file, but i didn't find any solution for this in web3-eth command someone can please help to find out the ...
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1answer
163 views

DeclarationError: Identifier not found or not unique when deploying a facotry contract

I am using truffle with angular to write DAPP. I have a factory contract which will deploy an other contract named rental through a function called newContract. here is my factory contract pragma ...
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1answer
44 views

Incorrect Values for total supply/distributed amount

I am working on releasing a token on Eth and have been tinkering with some code to allow the token to be claimed via people sending 0 eth to the contract address. So far I have managed to implement ...
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1answer
87 views

how to transfer token with timestamp to restrict token transfer

I am working on basic ERC20 token smart contract and i would like to add some conditions in token transfer Suppose, I transfer 100 tokens to receiver on 2018-03-01 then receiver can't sent that 100 ...
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4answers
697 views

Creating a Secure android wallet application using web3 js

I'm new to ethereum and geth. I just want to know that my current architecture or solution to make a new Android wallet in secure way. Mobile wallet -> sends private keys over https -> REST API(Node ...
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1answer
125 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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2answers
1k views

How to get Ether in metamask account?

I am using Metamask for testing my contract which requires some ether, but, I don't have any ether in those accounts. I know Remix which provides four accounts with 100 eth. I have no idea how to get ...
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1answer
488 views

Does quorum support privacy between accounts when multiple accounts use same quorum-node?

From what I understand by this wiki on Transaction processing, quorum-nodes which are privy to a private Tx, will update their private stateDbs. My question is, can two different accounts access ...
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0answers
331 views

How can I create public-private key for a ERC20 wallet that using user's email address?

I am working on a side project that provides a wallet (Think Coinbase, Binance, etc) like interface to users where they will sign in using username and password. To be able to provide a clearer ...
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0answers
49 views

Cannot see address on geth instance console in the dev network

I am trying to develop a ethereum private network & i am using a single dev node. I startup my local dev instance of geth using this command below. geth --mine --dev --rpc --rpccorsdomain="...
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1answer
36 views

Keys and addresses terminology [duplicate]

I am trying to understand the difference between these terms : Wallet private key address in the ethereum ecosystem, and who contains ( sort of one to many or one to one relationships between ...
1
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1answer
28 views

Is this 'good enough' randomness?

Say I wanted to create a system on the Ethereum network to place bets on a prize pool that was under the current block reward say 2.5 ETH. Would these steps be a reasonably fair way to make sure ...
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1answer
465 views

Having trouble with Geth Node 1.8.2

I have been having issues since the geth update. Mist first gave me the error that I should install the newest update manually, and when I downloaded it and tried to install it, I was unsuccessful. I ...
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1answer
363 views

How to use hardened key derivation properly?

I am implementing a wallet for customers' deposits account. I am using ethereumjs-wallet/hdkey. I need to decide which derivation path to use: standard for ethereum would be m/44'/60'/0'/0 but maybe ...
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1answer
7k views

How to fix checksum mismatch in downloaded node for Ethereum Wallet?

I attempted to update Ethereum Wallet to 1.8.2 and was given an error: Checksum mismatch in downloaded node! MD5: 308... Please install the geth node version 1.8.2 manually So I went to https://...
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1answer
46 views

What are the conditions in a smart contract of an ICO [closed]

my question may be wrong, hope people understand i basically want to know what do people mean by "smart contracts" for ICO
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1answer
51 views

Ethereum wallet does not allow transaction even after proper conditions

Ethereum Wallet shows "It seems this transaction will fail ......" even though I've used if/else inside contracts to ensure that transfer value does not go higher than contract balance.` function ...
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2answers
55 views

Compile errror in remix doesn't make the thing clear

Doing lesson 5 from here how to write smart-contract, lesson 5 I got compile error in remix. It goes: browser/ballot.sol:40:2: ParserError: Expected pragma, import directive or contract/...
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4answers
986 views

How to access ethereum smart contract(already deployed) in a Java application via its address using web3j?

I have an existing Smart contract address,abi,binary code. I need to access it from a Java application.Is it possible to do this without creating a java wrapper class?
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1answer
88 views

How add payment method to a private blockchain [closed]

I have a question about private blokchain: I like to develop an Dapp in my own private blockchain. but i like to add payment method : i means, how users account pay (with stripe,..) and load his ...
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2answers
151 views

What is insecure about generating a random number with keccak256?

Just read that generating random a random number via keccak256 is insecure. What is insecure about it and what are the implications of insecurity?
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1answer
61 views

Could not transfer ether to smart contract

I'm testing one smart contract and need to send some ether to it, but when I try to do it I get error "It seems this transaction will fail. If you submit it, it may consume all the gas you provide". ...
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1answer
136 views

Switch between nodes/peers in Mist wallet

I'm new to ethereum and i'm facing this issue. I've created multiple nodes and add them as peers using geth console and can make transactions and stuff from there only. But on installing mist wallet ...
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2answers
389 views

Convert ethereum tokens to inr

I have created an account in metamask and have got some ether tokens. Now I would like to convert them into INR so that I get hard cash. Please let me know the procedure to do it.
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1answer
838 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() ...
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1answer
572 views

Where to store images for my dapp [duplicate]

I am developing an eBay DAPP as my second project. The transactions are taking time. How to reduce transaction times? Moreover, I want to add an image uplaod option too. Where should I store the ...
1
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1answer
797 views

Setup Ethereum-Wallet as geth RPC

I develop a dapp with truffle.js and wish to deploy to the live network. I have the Ethereum Wallet already installed (mac osx), and I'm pretty sure it runs on top of geth - am I correct? Anyway, does ...
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1answer
1k views

Transfer ERC20 Tokens from my wallet to another wallet

before I start just wanted to say that I started a few time ago with solidity and I'm still noob, but I've been reading and researching about this and can't get it working. I'm using ethereum wallet ...
1
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1answer
444 views

Using a HD Wallet on server

We are working on a crypto exchange and need to organize deposits and withdrawals. How would we organize our wallet? The only HD Wallet I found so far is https://www.npmjs.com/package/eth-hd-wallet. I ...
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 ...
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2answers
752 views

How can I set gas and/or gasPrice on a Token Contract ?

I copied this token contract from Ethereum.org, and after deploy to Rinkeby, I could not buy tokens. I really do not know why, but I think that's because I did not set the gas on contract. is there ...
0
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1answer
412 views

How to retrieve wallet's creation date via API of etherchain.org?

I've been searching for a way to retrieve wallet creation date and didn't found any good approaches so far. What I've found is parsing First seen field (left-bottom corner) from etherchain.org site. ...
2
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1answer
775 views

How to integrate simple wallet on website

I couldn't find the answer to my question anywhere else so I'll explain it here hoping someone will answer. I would need to integrate a pretty simple, but of course secure, wallet on my website. ...
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1answer
74 views

Creating Ethereum Account on sing up through webpage

I am creating a voting dapp in which the voter comes to the poll for voting and after the id verification of the voter an account is made for them which is printed as QR code and handed to them for ...
0
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1answer
81 views

Browser based Ethereum app vs Wallet app

What are the pros and cons of having an Ethereum DApp running on a browser compared to the one in which each user is given a wallet? This is question is for a DApp that would transfer files from user ...
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2answers
403 views

Mist dont run when i run geth from command prompt IN MAC [duplicate]

I want to start rinkeby locally on network ....... When I run geth from command line, it uses datadir folder. While geth is running on I also want to start mist, but it give me error datadir is used ...
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1answer
21 views

Is there any possibility to exclude one of MuliSig Wallet owners?

I mean not to exclude from already existin multi sig wallets, but create a wallet with such possibility. For example: The team of 4 people want to accept temporary 5th member (give him the right ...
2
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1answer
812 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 ...
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1answer
619 views

Where else can I get Rinkeby Ether apart from faucet.rinkeby.io/

I have been trying to get rinkeby ether from faucet.rinkeby.io/ but couldn't. Any alternative?