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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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votes
1answer
186 views

How to map multiple time and index value on same address

I wish to map the time to the address key. But currently it is working on the index key only. I just want to map time as well. Means the current time. So that I can able to get the record with time as ...
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1answer
13 views

In MetaMask, I have my seed phrase but I didn't export my private keys. How do I recover my wallet?

So, I've been using MetaMask to try app.compound.finance and everything went well. I've deposited a small sum and connected the app to the wallet. But a few weeks later I decided to deleted the chrome ...
0
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1answer
85 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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2answers
337 views

Metamask won't display correct balance after creating customrpc for ganache accounts

I made a customrpc network on metamask using the correct server and imported a private key from ganache, which worked but the eth balance is displaying 0 when I expected it to display 100. According ...
0
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1answer
192 views

How to read previous blocks data?

I'm new to block chain technology. I'm trying to store and read blocks using testRPC along web3.js. I'm able to get the latest block data but not able to fetch previous blocks data. Please some one ...
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3answers
105 views

Crowdsale tokens count is not reducing even user gets the tokens to his account

I had created 100 million tokens and created a contract for crowdsale in test network If user sends a 1 ether using contract address i am able to receive 1 ether and send 1000 tokens to user who send ...
0
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1answer
186 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?
1
vote
1answer
84 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
19 views

Setting ERC-20 token price

I'm currently trying to set the token price of my ERC-20 token.The problem I'm having is trying to set the price to ETH(0.01) per token, but the closest value I keep getting to is ETH(0.001) per token ...
0
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1answer
18 views

Not able to generate java wrapper class from solidity smart contract using truffle

I'm trying to generate java wrapper class of solidity smart contract using truffle but not getting wrapperclass.java file Here is an command which i've used to generate abi/Json of that contract ...
3
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2answers
696 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....
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1answer
78 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 ...
1
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1answer
147 views

Can the Android Metamask Extension be used with DApps?

I've successfully downloaded the Metamask Firefox Add-on, and imported my wallet into it. However I'm failing to see how I can use this add-on from within my DApp like I do on Chrome, using the ...
0
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1answer
37 views

how can i count how many buyers made request to my smart contract and get earnedEther [on hold]

I am using a factory contract for selling and buying goods. how can retrieve how many buyers bought and calculate how much ether earned by selling goods? here is my source code. I am new on smart ...
1
vote
1answer
138 views

Can a mapping or array within struct made public?

contract CrowdFunding { struct Funder { address addr; uint amount; } struct Campaign { address beneficiary; uint fundingGoal; uint numFunders; uint amount; mapping (uint =...
0
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3answers
256 views

Unlocking Ethereum wallet using Geth JSON-RPC

When I use ETH with JSON-RPC I have error "message": "authentication needed: password or unlock» and If I manually unlock I have other error "message": "insufficient funds for gas * price + value" Any ...
1
vote
1answer
125 views

Interacting with trade/order function which require sha3 hash

I'm currently building a dapp that use both of theses functions : function order(address tokenGet, uint amountGet, address tokenGive, uint amountGive, uint expires, uint nonce) { bytes32 hash = ...
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0answers
16 views

Can we connect custom Ethereum currency through java's web3j library ? If yes then how?

Im trying to create my own new currency using solidity and ethereum platform and also i want to create an Ewallet of my currency using java so that my ewallet could communicate through api .If u ...
0
votes
1answer
23 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 ...
1
vote
1answer
150 views

Installing Ganache GUI on windows 8.1

How to install Ganache UI on windows 8.1 ? I downloaded from Official website but after downloading i am unable to install it on my machine. I tried to install it through power shell but facing ...
0
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2answers
36 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: ...
2
votes
1answer
299 views

web3.js new accounts without local node!

I am trying to develop an dapp, but since I am running a small server (Windows Sever 2012 R2) with limited space I don't want to host/install an ethereum node, nor geth in my server, because as many ...
0
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1answer
132 views

Is it possible for a ERC20 token to be associated with an application account after the fact?

Say you want to create a new utility token offering, and owning that token will be useful in an application still in development. You don't want to dissuade people from purchasing by requiring a lot ...
5
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4answers
517 views

Can Ethereum DApps work without downloading all blocks in the network?

I've just downloaded Mist (the Ethereum wallet) and am waiting for all blocks to download. I'm on the test network and its been 24 hours with only 50% of the blocks downloaded. My question is, if one ...
0
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1answer
104 views

Why I am unable to write to contract in ethereum wallet?

I clicked on the watch contract and entered address and ABI. But I can't see any functions to write to contract. I compiled and deployed contract by using truffle framework ABI: { "...
1
vote
1answer
158 views

Transfer ETH from wallet into two different accounts(sites)

Could I have one wallet that can be used for two different cryptocurrency sites? For example: If I transfer ETH into my wallet form one site, could I used my ETH in my wallet to deposit the ETH into ...
1
vote
1answer
390 views

Unusual error with bytes calldata

pragma solidity >=0.4.22 <0.6.0; interface tokenRecipient { function receiveApproval(address _from, uint256 _value, address _token, bytes calldata _extraData) external; } contract ...
0
votes
1answer
425 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 ...
1
vote
1answer
254 views

NodeJS with HDWalletProvider

I want to execute signed Ethereum transactions from a NodeJS program. I am creating a web3_provider like this var contract = require("truffle-contract"); var provider = new HDWalletProvider("nemonic"...
0
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1answer
259 views

Use injected metamask inside of an ionic app

Ive seen this topic mentioned on the ethers of stack exchange before and mostly these questions go unanswered but being that ionic is basically a fancy webview I am wondering if anyone has managed to ...
0
votes
1answer
213 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 ...
0
votes
1answer
127 views

Mist Wallet Synch Stuck - Not coder/geek

I too have the 'synch stuck' syndrome suffered by many others. I don't think I've ever been this frustrated but am trying to be patient. After 12-24 hours I get stuck around 2.4m block after multiple ...
0
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1answer
177 views

How to start GETH console?

I'm getting the following: ➜ voting_truffle geth console WARN [11-29|22:53:43] No etherbase set and no accounts found as default Fatal: Error starting protocol stack: datadir already used by another ...
0
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1answer
170 views

Metamask stuck at Unknown network ID

I'm getting unknown network ID error on transferring a token in meta mask as in the image below. I'm using local network with ganache. I can transfer from metamask account to another after ...
0
votes
1answer
22 views

How to setup clef signer with clef --stdio-ui

I have geth running on rinkeby network and successfully used clef as a signer using command. clef --keystore ~/.ethereum/rinkeby/keystore --chainid 4 --stdio-ui Also started geth with clef as ...
0
votes
0answers
22 views

How to build an ethereum based wallet with custom UI?

I have been interested in ethereum for quite some time now and have always wanted to learn ethereum development. I decided to create my custom erc20 tokens i was able to create 2,00,000 tokens. Now i ...
0
votes
1answer
193 views

input decimal type parameter for contract in ethereum wallet

Is there any way to make ethereum wallet can input decimal type parameter for contract at "WRITE TO CONTRACT". For example, "sellToken" function, I want user can sell 1.23 tokens. I have see the ...
0
votes
1answer
50 views

Recover myetherwallet account with json but without password

I have lost my usb stick which contained password for access to my myetherwallet. Are there any ways to recover that, only thing I have is .json file, can I get from it private key or is there any way ...
2
votes
1answer
339 views

How to connect my private ethereum network to ethereum android app?

I want to access my smart contract through a mobile app, which is on my private network. There is ethereum android app, can I connect that app to my ethereum network or if there any other app through ...
0
votes
0answers
31 views

Sign Message using passphrase only

I'm creating an authentication system using python and web3.py. I'm trying to authenticate a user using from web3.auto import w3 msg = 'sdb41554xcb4xc548cxd84dxcb' message = encode_defunct(text=...
0
votes
1answer
261 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 ...
0
votes
2answers
390 views

geth attach issue between mac and windows

I am running geth on windows machine and try for geth attach in mac. I give below error: Fatal: Failed to start the JavaScript console: api modules: Post http://192.168.0.107:8545: context deadline ...
0
votes
1answer
19 views

How DApp actually talks to Ganache ethereum node?

Both Metamask and web3.js seems to be enabling a DApp communicates to a remote ethereum node. There are a few different aspects to developing blockchain applications with Ethereum: Smart ...
0
votes
0answers
18 views

What Android App has block explorer functionality for Ethereum testnet?

I need to interact with my web app that has blockchain functionality and it creates wallets on paper (pls dont ask why). It's using ropsten testnet. Is there an Android app that I can easily scan the ...
0
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2answers
29 views

Stuck in Contract or something similar

Hey guys i almost sent ethereum to a scam address luckily it got rejected cause i didnt use enough gas. this is the ethersacan transaction https://etherscan.io/tx/...
0
votes
1answer
22 views

Error While Compiling In Remix During Tutorial

During a tutorial on my first compile I received this error: :1:1: Parser error: Expected import directive or contract definition. pragma solidity ^0.5.12; ^ What's that about? How do I fix it? I'...
0
votes
2answers
47 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 ?
3
votes
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; ...
3
votes
1answer
638 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 ...