Questions tagged [ethereum-wallet-dapp]

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

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1answer
264 views

If I scan the ETH blockchain, how do I know if the ETH addresses belong to ERC-20-compliant wallets?

If I scan the ETH blockchain, how do I know if the scanned ETH addresses belong to ERC-20-compliant wallets?
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1answer
130 views

how do token exchanges work with the limited smart contract methods?

Looking at the source code for various token implementations (e.g. here and here) They have the following API: // presume can only be "called" by owner. Transfer(address to, number amount) // ...
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1answer
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External purchase of tokens

I have a problem with development of the smart-contract for ICO: i need to implement accounting of tokens, which will be sold outside the smart-contract (e.g. if somebody bye tokens with other crypto-...
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3answers
178 views

Can i restrict a user from making only one transaction in a smart contract?

For example in a voting dapp, I want only one address to make one vote. My doubt is can i store all the address of message senders in an array and check before casting the vote and hence allowing only ...
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1answer
391 views

ABI for Etherscan verification

How I can get ABI in multiple contract code? if the code is here: Token address is: 0x4960a0Db832c3Bb503F3Da59a274D9385e0Ade5A Crowdsale contract: 0x7a76d1A86a8b801865eC9134552904366b327A45 I ...
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2answers
3k views

How is Ethereum Wallet's transaction cost calculated?

Lately, I've seen wildly varying transaction costs when using Ethereum Wallet. How is the fee range computed? Current range:
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1answer
66 views

How to customize/modify the default startup url in Mist brwoser for ERC20 tokens on Ethereum?

Hi I am making an ICO wallet. I know Mist browser(https://github.com/ethereum/mist) has a lightweight version coming up soon and ConsenSys(https://github.com/ConsenSys/eth-lightwallet) has one, but I ...
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1answer
358 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 ...
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1answer
469 views

Can't call function with modifier from another contract even if the owner himself calls

So I have multiple contracts that use the same modifier. contract Token is ERC20Basic { using SafeMath for uint256; mapping(address => uint256) balances; Owned private owned; /// @dev `owner` ...
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1answer
493 views

How to connect with smart contract using provider using node js?

When I am doing the following I'm getting this error: var result = this.provider.send(payload); TypeError: this.provider.send is not a function What is the solution?
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1answer
56 views

I send mistake ETC wallet [closed]

Pls help me I bought 0.3 ETH in my ETH wallet, but i send ETC wallet to seller. Tks
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1answer
1k views

Build an Ethereum Wallet using React [closed]

Using React js i am trying to create a wallet I want to implement few functionalities 1) display balances of all the accounts 2) Display tokens by providing smart contract address how can i ...
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3answers
280 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 ...
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3answers
375 views

Data Model - Data Warehouse SQL Based - Deploy in Blockchain Ethereum

I am looking for a little clarification/guidance. I currently have a SaaS-based product that is delivered to institutions. I operate a serverless architecture, with an individual database for each ...
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1answer
92 views

Does anyone have a smart contract that allows me to send to many recipients at once?

I just started using ethereum, so im not sure how smart contracts work and if this would be possible. Id like to be able to send ether and also cob from one account to a few hundred other accounts in ...
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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); ...
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1answer
2k views

Does ethereum support something like bip32 extended public key?

Bitcoin and Litecoin have something called XPUB key or Extended Public Key that essentially allows to track all generated public addresses, so think monitor your total balance in one key. I was ...
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1answer
302 views

My Ethereum Wallet/Mist Stuck after Byzantium update

After updating my ethereum wallet and mist now they are stuck at around block 4,375,146. It actually keeps downloading new block but never goes up to the latest block (always +4000 block behind... and ...
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2answers
349 views

Token Contract Fails When trying to buy via Ethereum Wallet

Before I post this question, I have searched several times all such relative questions and couldn't find a proper solution. Let me narrate the steps I did and the Issue I have. I did all these steps ...
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1answer
429 views

All My Transactions Since Friday Are Still Pending

I've been having a real bad time with Mist and the Ethereum Wallet as no transactions at all are getting confirmed are just pending. My client is fully synced and displays the same block number as ...
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1answer
69 views

What is rpc and p2p code for Ethereum token? What to give as GitHub source code of an Ethereum token in exchange?

I’m new to Ethereum development. From ethereum token docs I came to know the process of deploying the token. But at some exchanges they ask for RPC and P2P port as well as the github source of the ...
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2answers
411 views

unable to use testrpc with ethereum wallet

i am trying to open ethereum wallet with testrpc to quickly test my code. 1) have opened the command prompt and entered cmd "testrpc" 2) opened another command prompt and entered cmd ""Ethereum ...
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1answer
258 views

Check ethereum balance using text box

I want to check ethereum balance of accounts by entering address in text box and click on check balance button it must show the balance in the account. Please some one help with related links My ...
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2answers
5k views

Custom token - do i need to create my own wallet for ICO?

So my partners and I have been spending the last few months working on creating our own token which will be used in our platform. We are wanting to launch an ICO to raise a bit of funds to further ...
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0answers
197 views

how to create multisign wallet from scratch?

I am new in creating smart contract I want to create a multisign wallet from scratch?? I want to create accounts 1st and want to hold private key safely
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2answers
3k views

Storing private data on the ethereum blockchain

I plan to make an app utilising Ethereum that will store private data about a user. Eventually, I want this data to be accessible by selected users. I have seen conflicting answers & discussions ...
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1answer
109 views

Not able to read Array of Addresses in Function

function approveUsers(address[] users) onlyOwner { for(uint i=0; i<users.length; i++) { approvedUsers[users[i]] = true; //Mapping {address: bool} ApproveUserForPreSale(users[i], ...
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1answer
154 views

2 days ago when i open my ether wallet i notice that all of my ether is stolen [duplicate]

2 days ago when i open my ether wallet i notice that all of my ether is stolen about 25 ether my addres is 0xbE50d343BC815C424a5bD3abf7B3046fe4f491c9 and the hacker addres is ...
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1answer
105 views

Problems funding Ethereum Wallet

Tried making three separate transactions from two separate wallets (Coinme and Coinbase) each in relatively small amounts (less than $50) to fund my Ethereum Wallet 8.0 for Mac. None have appeared ...
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3answers
107 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 ...
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0answers
594 views

How to update the Ethereum Wallet Solidity Compiler

I'm using the latest Ethereum Wallet version which is 0.9.0 and I want to update my latest Solidity compiler since it seems that the wallet is using this version 0.4.13+commit.0fb4cb1a.Emscripten....
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1answer
99 views

Does Ethereum wallet cache passwords?

I am using Etherum wallet (this thing: https://imgur.com/a/WGDLs) I created a new account, transferred 0.01 etherum into it. Then I went to accounts -> backup -> accounts, which took me to Users\...
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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 ...
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0answers
578 views

How to query the blockchain data ?

I am developing an KYC dapp where I am keeping customer information like name, dob, age etc. Each customer is having an account address ( i.e Ethereum account). Basically this is a private blockchain. ...
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1answer
368 views

Crowdsale Contract, why I can't send ether to contract?

Ethereum wallet displays: It seems this transaction will fail. But why? Here is the code: function () payable { uint amount = 0; amount += msg.value; balanceOf[msg.sender] += amount; ...
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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: { "...
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0answers
495 views

How to restart mining in my private blockchain?

I successfully setup a private blockchain in my laptop and mined around 5160 Ether (no market value). Also deployed a smart contract. Now I had to close my laptop and when I came back and turned the ...
2
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1answer
694 views

In an Ethereum smart contract, can I check the balance of other ERC20 tokens from the sending address of a recieved transaction?

I'm currently designing a smart contract, where I'd basically like to incorporate a "coupon" like relationship between two different coins. Bob can send the smart contract CoinA, and receive CoinB as ...
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3answers
511 views

Required api's for crypto token wallet

I am creating the api server for creating the interaction with crypto token smart contract , i want to know the required api's through which i can perform basic functionality of sending and receiving ...
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2answers
489 views

Unable to use wallet.ethereum.org with my own node

I'm running my own ethereum node on my LAN with command line: nohup geth --rpc --rpccorsdomain "https://wallet.ethereum.org" --rpcaddr <ip> & When running a curl command on a git bash ...
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3answers
228 views

Basic question on distributed Smart contract

Basic question on distributed Smart contract. Let us assume , I am writing a smart contract and deploying it in public network. My Contract Specification • My contract would allow anyone to ...
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3answers
2k views

How to use metamask for etheruem dapp

I am trying to create an application using ethereum ,where node.js has used to call methods of smart contract and angular as frontend . I want to use the metamask wallet so my apication can ...
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1answer
341 views

Storing in smart contract memory

I am developing a dapp in which I need to store large number of employee/customer name or id. Can I use array or map in my smart contract code? Will it increases the smart contract memory as number ...
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0answers
295 views

Mist Wallet Contracts are stuck

I synced my blockchain using Ethereum Mist, created an account and tried to create a single wallet contract. Once I made the wallet the contact creation transaction went through, however the wallet ...
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1answer
1k views

Accessing the wallet with the keystore generated using myetherwallet.com

I assume the UTC file which got generated in myetherwallet is the keystore file. Also I have my private key noted. I understand that the myetherwallet will stay long and there is no plan to close in ...
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1answer
204 views

Connect to separate geth with Ethereum Wallet

I am fed up with the slow syncing progress of the Ethereum Wallet from ethereum.org. Every time I start it up I have to wait. It would be much more convenient to have a geth instance running remotely ...
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1answer
356 views

How can I build a smart Oracle of my own for a smart contract? [closed]

I need my smart contract to access data from some source. I want to build a smart Oracle in order to achieve this.
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1answer
754 views

How to create Wallet for Private Blockchain Network?

I am creating private block chain network on AWS. Can I use existing block chain wallets like MyEth wallet with Private network?
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2answers
295 views

Resell or Refund the tokens after the ICO ends

I have 2 questions about ICO: 1.What are the available methods to resell the tokens after the ICO ends? 2.Can the user return the tokens after the ICO ends and get a refund? For example they buy X ...
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1answer
194 views

Unable to deploy smart contract on testnet or by using testrpc stuck

I have completed writing a smart contract successfully and using Ethereum Wallet to deploy contract. After waiting for 3 days I have synced testnet Ropsten successfully but not able to mine ethers, ...