Questions tagged [ethereum-wallet-dapp]

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

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2
votes
2answers
356 views

How to pay transaction costs for other people

I'm currently building a feature where users can exchange their ERC20 token for a that can be used within our DApp. This therefore requires a transaction from the user to us (their ERC20 token to us), ...
2
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3answers
767 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 ...
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1answer
304 views

Gas Requirement for Ethereum Message Signing

Is Gas required to sign a message using ethereum?
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0answers
372 views

Deploy Contract that Imports Other Contracts in Mist

I have a main smart contract that Imports two other contracts by their file path. Inside the contract I have: Import "/test/files/test.sol" Import "/test/files/testimport.sol" So I have three ...
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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/...
1
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1answer
298 views

How to rename accounts in ethereum wallet?

I have 4 accounts in my ethereum wallet(using a private blockchain network) and they are named as: 1. Main Account(etherbase) 2. Account 2 3. Account 3 4. Account 4 Can anyone help me out to rename ...
1
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1answer
1k views

ERC-20 Token Transfer Failed

I am trying to transfer ERC-20 Token Senderon (SDRN) from my Senderon wallet to any other Ethereum wallet address. When I try to do this it fails and has the following message: "Warning! Error ...
1
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0answers
49 views

Private Chain Self-Hosted Mist Wallet Build Issues

I'm currently trying to deploy a fork of the Meteor Wallet Dapp on a custom private chain and I'm a bit confused at the set up, there seems to be a bit of lacking documentation on how Mist, Meteor-...
0
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2answers
250 views

When to use metamask and ethereum wallet

I am confused with metamask and ethereum wallet and Truffle. I used metamask in Truffle Petshop tutorial. Then I am using now ethereum wallet with first voting dapp. I m confused totally
4
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2answers
8k views

Using sendTransaction in Web3.js

I'm trying to make a function in my Dapps front end that requests Ether from the user, I know I have to use web3.eth.sendTransaction() but am unsure of how to correctly implement and call this ...
0
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1answer
913 views

MetaMask doesn't support synchronous methods like eth_sendTransaction

I'm trying to call a function in my smart contract and keep getting the error Uncaught Error: The MetaMask Web3 object does not support synchronous methods like eth_sendTransaction without a callback ...
1
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1answer
2k views

get ERC20 token balance with web3j

I am able to get the balance of my custom token with web3 javascript.The code is shown below. However, when i switch to web3j, I don't find equivalent method like web3.eth.contract(contractABI).at(...
0
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1answer
2k views

Showing “We couldn't estimate the gas” error in estimated fee consumption field while executing a contract in ethereum wallet

I have tried creating contracts in ethereum wallet but sometimes it shows an error while executing those contracts. The error says It seems this transaction will fail. If you submit it, it may consume ...
0
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1answer
124 views

How to use our own crypto currency for transactions in smart contract

I have created my own crypto-currency and tried sending it to an address through my ethereum wallet but can anyone tell me that how can I use this crypto-currency in another smart contract for ...
0
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2answers
460 views

How can we compile and call a smart contract in ethereum wallet [closed]

I have created a sample smart contract in the online solidity compiler called Remix and I have also created a private blockchain. Then I also have an ethereum wallet running on this private test ...
0
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2answers
86 views

How is Ethereum wallet checking the contract condition to show the alert?

I have a condition in my contract. require(msg.sender == tempTeam.getConvener()); If I send a transaction to this contract which violates this condition, ethereum wallet immediately notifies me with ...
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 ...
-5
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1answer
267 views

Need Code to create ethereum wallet address [closed]

I am developing a dashboard to integrate "Ethereum" wallet, I am kinda lost, can anyone help me with the code that can generate the ether wallet to registered user? Sincere thanks in advance. ...
3
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1answer
1k views

Ethereum wallet address creation limit and ether storage limit/capacity per address

I am new to Ethereum. I would like to know How many addresses can you create in an Ethereum wallet (limit)? Meaning is it 1K, 10K or 100K addressees you can create in a Ethereum wallet What is the ...
0
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1answer
26 views

problem with sending token

I always having issue with sending token. when I send token even transaction get confirm, the token remain in my wallet and I lost only ether on fees! what wrong with ethereum!
0
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2answers
405 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 ...
1
vote
1answer
148 views

Invoking a smart contract from a front end

I am building a Dapp that will need to invoke a smart contract and then send funds to another address. Do, I need to be running my own node to accomplish sending a request to the Ethereum network? Is ...
1
vote
1answer
71 views

crowdsale contract on my Ethereum Wallet for windows

I first created a token without difficulty with Ethereum Wallet can be see here: https://etherscan.io/address/0x926351469a1a97Ca5AB9b80928a0Ba01493d39F9#readContract. Now I'm trying to do a ...
1
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1answer
91 views

Ethereum Crowdsale contract Stuck Ether

I tried my hand at creating a crowdsale contract. After sending my custom token to the contract and doing test purchases by sending ether to the crowdsale contract a issue is now at hand where the ...
1
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0answers
156 views

ethereum wallet and mist both download separate blockchain?

I am on OSX using a mac pro. I downloaded and installed mist, before ethereum wallet (ew) on advice from an ether forum. Mist started downloading the blockchain. It took up too much space on my SDD ...
0
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1answer
71 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 ...
0
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1answer
557 views

Is there a Dapp for an Escrow(like) Smart Contract?

I have been searching and can't tell if I'm just confused or what. But I am trying to find out if there is a Dapp or if i need to make a smart contract that allows me to make an escrow smart contract ...
0
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1answer
266 views

Sending ETH rather than ERC20 token Web3

I'm currently writing a function using Web3 to send our tokens, it's currently sending ETH instead. Since we're doing this straight on the main network (We like taking risks), the transaction fees are ...
3
votes
1answer
702 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 ...
1
vote
1answer
484 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 ...
0
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1answer
241 views

Buy() function not acting as expected

I am experimenting with the MyAdvancedToken code at: https://www.ethereum.org/token function setPrices(uint256 newSellPrice, uint256 newBuyPrice) onlyOwner public { sellPrice = ...
0
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1answer
124 views

Which is the node, to which metamask is going to connect?

I know that metamask is using Geth client, but which node is it going to connect if I select main network to connect. Generally we use our node server and connect it with client, but how metamask ...
1
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2answers
547 views

How to use MEW to access simple wallet contract created in Ethereum Wallet / Mist

I picked up some ETH around a year and a half ago and left it in a simple wallet contract created using the Ethereum Wallet / Mist in July 2017. I'm offering a reward of $100 in ETH to the person ...
1
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2answers
3k views

How to access eth wallet with utc file

I have only saved the UTC file generated from myetherwallet and after losing data from my laptop i lost the document where i had my password and private key. Can i recover my account now ?
0
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1answer
165 views

mistakenly sent ETC to ETH address on Cryptopia [duplicate]

I have mistakenly sent ETC from Cryptopia To an ETH address.How can i recover my ETC back.
0
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1answer
115 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 ...
0
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1answer
199 views

What's the difference between “Deploy New Contract” and “Custom Token”?

Can someone please explain what the difference between Deploying a new contract versus a custom token. This is on wallet.ethereum.org and when you go to the contracts tab, you will see it there. So ...
0
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0answers
71 views

API for tokensvalue

I was wondering if there is any API service for getting info about tokens on an ethereum wallet, I found https://ethplorer.io/, but unfortunately with that service there is no possibility to get ...
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 ...
1
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1answer
287 views

How to access state of the contract per transaction event?

I've a contract which has a price attribute. Price goes up with each transaction. contract MyContract{ uint256 public price; .... other methods } For transaction I receive following event ...
0
votes
1answer
387 views

Ethereum downloading blocks stuck

I don't know much about investing as i am still new to this. I use ethereum node Geth 1.7.2. I bought a certain percentage of ethereum without letting it sync or download the blocks first (though I ...
1
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0answers
62 views

Does Mist Wallet support transfer of Ether through a Smart Contract?

I have implemented a private ethereal blockchain. I have also deployed a simple trading smart contract. It runs fine once deployed through MIST wallet. The problem is that it does not subtract ether ...
0
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1answer
2k views

How to use custom ERC20 Tokens for payments [closed]

I am currently implementing a private Ethereum Blockchain. I have also created a custom ERC20 Token smart contract. I want to know how to use this custom token instead of ether for another smart ...
1
vote
2answers
499 views

Access ethereum client from remote machine

I need to access ethereum client setup on remote hosted machine (google cloud ). How can I access the client from the web browser of my local machine ? Current installations on my machine user@...
0
votes
1answer
196 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
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2answers
42 views

How to reach my ethereum wallet?

I have an Ethereum wallet address, but I don't know from which platform. How can I find out were my wallet is from?
0
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1answer
57 views

Downloaded Wallet from Ethereum Site and sent money without realizing what I was doing. Help! [duplicate]

I tried really hard to figure this out on my own, but I'm pretty out of my depth, and I feel like the things that I have found that could answer my questions assume I already know some stuff. I'm ...
1
vote
1answer
514 views

Error when calling a function of a smart contract with web3j

I am trying to use a function which returns a value of the smart contract (pakoin). contract Pacoin { /* This creates an array with all balances */ mapping (address => uint256) public ...
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 ...
0
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1answer
352 views

how can you deploy smart contracts on main ethereum network? [duplicate]

I have created a dapp and using truffle I have migrated and tested it on ganache, I was wondering how can I deploy same application on main ethereum network.