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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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4
votes
1answer
2k views

How to set truffle-hdwallet-provider as the Web3 currentProvider inside a web page

https://github.com/trufflesuite/truffle-hdwallet-provider/blob/master/README.md provides sample usage for the deployment configuration inside tuffle.js. I need a sample that update the Web3 ...
3
votes
2answers
301 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 ...
2
votes
2answers
143 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 ...
1
vote
0answers
49 views

scatter confirmation for sign a transaction?

I have built an dapp. It's almost like twitter where the user can tweet and also use as a microblogging site in blockchain.I have used scatter as transaction signer for using my dapp. The real problem ...
0
votes
2answers
313 views

how to create genesis block on ethereum?

geth --datadir ./ init customgenesis.json Fatal: Failed to read genesis file: open customgenesis.json: no such file or directory
0
votes
0answers
38 views

Function works on ethfiddle but reverts in mist

I've had this occur a few times, where I create a smart contract and one of the functions works in ethfiddle but reverts in Mist. I realized that in the Mist wallet, when I run the functions that fail,...
0
votes
1answer
39 views

How do I make my private Ethereum network public? [closed]

So after a lot of reading I was able to make my own private Ethereum network, most of the readings I did showed me how to test it privately, but none of them actually explained how to make it public, ...
1
vote
2answers
78 views

Smart Contract Working on Remix but not TestNet

This question has been asked before. however, those answers did not help me. (of course, I now can't find the "answer" atm) It said that Ropsten (what I was currently using) has fewer miners - or ...
1
vote
3answers
32 views

Why I can not trade coins stored in cold wallet?

There are two kinds of wallet hot wallet and a cold wallet. Ideally, people keep minimum balance for trading in a hot wallet and most of the coins are stored in cold wallet. I am wondering why coins ...
3
votes
1answer
401 views

Truffle Migrations missing ConvertLib.sol, etc

Using testrpc v3.0.3 and solidity Getting the above error while deploying this contract in testrpc private net pragma solidity ^0.4.4; import "./ConvertLib.sol"; import "./Agreement.sol"; contract ...
26
votes
9answers
39k views

How to get private key from account address and password?

What I have 1. I am able to create new account with personal.newAccount() method of web3 api. 2. I am working on my private blockchain. 3. geth node start with following command:- geth --datadir ~/...
3
votes
1answer
354 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=...
0
votes
1answer
154 views

web3 reading memory string gives error

i have declared a string variable in struct like struct test{ string testString; } I have written a function to access the variable like function getteststring(uint256 index)public ...
0
votes
1answer
128 views

Fetch the mapping variable history from Ethereum blockchain

I am using ganache and truffle for building DApp, In my smart contract, I have declared one mapping variable, now in function I am assigning some value to that mapping variable. Every time I am ...
1
vote
2answers
314 views

Can security tokens (ST-20) and utility tokens (ERC-20) exists on same blockchain?

I am trying to build a dApp in which the functionalities of the dApp can be accessed by utility token but in the same app I wish to tokenize the securities as well. Can my utility tokens and the ...
1
vote
1answer
25 views

I want to change 17k addresses password on ubuntu server

I have 17k ethereum addresses. I want to change passphrase all of them. Are there any way to change all addresses passphrase? geth account update 0x... It is really hard to change 17k addresses ...
0
votes
0answers
940 views

Type address is not implicitly convertible to expected type address payable [duplicate]

Can you please help me out how to explicitly convert address to address payable as i am using solidity compiler above 0.5 its asking me to have address payable when i use transfer().
0
votes
1answer
63 views

Resource files are not not publishing in ipfs name publish

I made sample dapp application for interacting with smart contract and i developed a basic ui when i am publishing it to ipfs like i did seeing a tutorial and ipfs documentation, i can get only index....
1
vote
1answer
26 views

What is this address and for what?

What is this address and for what? 0x000000000000000000000000000000000000bEEF
1
vote
2answers
147 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?
4
votes
4answers
452 views

Can I use ether.js with truffle

I have buid a dapp with web3, truffle and metamask, which works perfectly fine. Now, instead of using a wallet I want to create my own wallet using ether.js, but couldn't figure out a way to use ...
1
vote
3answers
5k views

How to generate Private key, public key and address

I can't find any documentation online about doing this in Javascript other than this. I want to know how does authentication work in a ethereum dApp's.. As per my understanding user seed somehow gets ...
0
votes
1answer
114 views

Which smart contract should I use to wrap Eth [closed]

I need Weth for my dapp. So I looked at how AirSwap converts ETH to Weth. On the Rinkeby testnet, AirSwap calls this contract and uses the "deposit" function. I see from the code how this would work. ...
1
vote
1answer
302 views

Solidity compilation issue : Function overload clash during conversion to external types for arguments

I am new to solidity trying to compile the code which was an old example running good with old compiler. When I tried to compile the same in remix with latest compiler, I am getting the below issue. ...
1
vote
1answer
235 views

How to access Mist transaction logs?

I have a private blockchain deployed on one machine and Mist & Ethereum Wallet on another machine. Both the machines are connected through RPC. I have made a simple smart contract which adds two ...
0
votes
1answer
13 views

Is it possible to provide some manual data to create private key for the ethereum account?

We were trying to provide some manual data to create the private key if I want to create a new ethereum account using this private key.
2
votes
3answers
480 views

How can i transfer erc 20 tokens manually in bulk?

Can anyone help me with how to transfer tokens manually in bulk?as i have to transfer tokens to multiple ETH addresses but cannot waste time transferring it one by one.
2
votes
2answers
508 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 ...
0
votes
1answer
54 views

Ethereum Decentralized Wallet Service API [closed]

With the decentralized nature of the blockchain space it makes sense for this to be a thing. I need a wallet API service that does not store private keys, allows our servers to create a wallet & ...
0
votes
1answer
44 views

Is it ok to build app with huge data in ethereum blockchain

I agree that the smart contract works well for small Apps. Is it ok to develop a app with huge data. For this let us take an example of building a huge patient database across hospitals (only with key ...
0
votes
1answer
1k views

create ether wallet using nodejs

I have implemented the code which is creating new wallet but I am not able to get the private key of that wallet. Can anyone tell me like what is the proper way in which I can create new wallet which ...
0
votes
0answers
45 views

Recommended Architecture for Deployment of Web3 APIS

I am making a dapp and need a suggestion for below: I have build smart contracts and deployed on Ropsen. I have written web3 Methods to interact with smart contracts with the help of Infura. I have ...
0
votes
0answers
83 views

i can't get rid of this error

const HDWalletProvider = require("truffle-hdwallet-provider"); const Web3 = require('web3'); const {interface,bytecode} = require('./compile.js'); const provider = new HDWalletProvider( 'slim ...
0
votes
1answer
25 views

can an ethereum contract control alternative assets like btc?

can ethereum contracts control other assets, where the actual contract owns the btc and will only release it back to the address it was sent from (to avoid a DAO type hack) once a certain signal is ...
27
votes
3answers
26k views

payable() function In solidity

I have read many examples of payable functions, but I didn't understand any of them. Also, they talked about modifier in payable. My questions are: What exactly does payable() function do? ...
1
vote
1answer
481 views

How to interact with a network without a wallet installed?

I'm making a Dapp for users who don't have a wallet installed and have no ETH address. I would like users to use my account for all transactions. I'd like to sign my transactions with the contract ...
2
votes
0answers
130 views

How can ethereum token use as payment gateway on ecommerce website [closed]

I have problem that if I created ethereum token and I want to use it in real project . especially in payment gateway . How can integrate ethereum token as payment in ecommerce website and how can ...
1
vote
0answers
43 views

ethereum wallet running a private net 0 peers 0 waiting for blocks

am using geth VRSION: 1.8.20-stable-24d727b6 and ethereum wallet Ethereum-Wallet-linux64-0-9-3 and i am using Ubuntu 18.04.1 LTS in the geth console i started the miner but either is not ...
2
votes
1answer
165 views

ethereum wallet:Your computer's clock is not synced.

i am using geth VRSION: 1.8.20-stable-24d727b6 and ethereum wallet Ethereum-Wallet-linux64-0-9-3 and i am using Ubuntu 18.04.1 LTS and on wallet startup wallet is showing the error message here ...
1
vote
1answer
353 views

How to hide my eth balance [duplicate]

i want to hide my eth balance from myetherwallet, etherscan , ethplorer .how to hide my eth balance in my ether wallet , etherscan , ethplorer. any methods available, please reply thanks
1
vote
1answer
53 views

Token transfer is not working

I am trying to transfer a token from a token contract. the control reaches till the point where I have the transfer statement later it fails. I do not understand why it is failing. I made sure the ...
1
vote
0answers
80 views

Unable to call setter function in solidity using Infura

Solidity code contract Greeter { string public greeting; function Greeter() public { greeting = 'Hello'; } function setGreeting(string _greeting) public { greeting = _greeting; } function ...
0
votes
1answer
51 views

Mineable Tokens? Is it possible? If so, how can I make one? [duplicate]

Just wondering if you could make a ethereum token that is mineable. I saw this link, but don't really know about it and i dont know anything about solidity. Can someone please help me? Thanks, ...
0
votes
1answer
21 views

Error creating contracts on Ethereum wallet. Need help [duplicate]

I am trying to create an ERC20 token off of ethereum, but when I put the code in the editor in the ethereum wallet, I get a weird error. It says: "throw" is deprecated in favour of "revert()", "...
6
votes
3answers
3k views

Error creating contracts on Ethereum wallet

First of all, I'd like to provide a disclaimer. I'm not a developer, I never studied codes, and never wrote scripts since I was 14 years old. I'm doing this project for the company I work in at the ...
6
votes
2answers
2k views

Login system for DAPP without metamask

I'm building Dapp on Ethereum. Imagine I have companies to register in my dapp, I will provide them with their own smart contract and public and private key pair, which they will use to just unlock ...
1
vote
2answers
54 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/...
1
vote
2answers
500 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 ?
5
votes
3answers
2k views

Transfer from contract address

I created a contract with a payable function but the ether is stored in the contract I am looking for a way to transfer the ether to another address
0
votes
1answer
149 views

Getting “Contract Compilation failed” error

I am trying to run my first contract and getting this error "Contract Compilation failed". pragma solidity >=0.4.0 <0.6.0; contract SimpleStorage { uint storedData; function set(uint x) ...