Questions tagged [ethereum-wallet-dapp]

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

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167 views

Problem verifying a contract on Etherscan

I wrote an Ethereum contract according to official example. When verifying it, on etherscan.io, I'm getting an error "missing constructors arguments". What wrong and how can I correct the issue? ...
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920 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 ...
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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 ...
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2answers
420 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 ...
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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 ...
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1answer
169 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.
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1answer
120 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 ...
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72 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 ...
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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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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 ...
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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 ...
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1answer
353 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.
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1answer
317 views

How to create custom testnet like ropsten? [duplicate]

Is that possible to create a private testnet which can act like ropsten network. i want to create a private net and i want to see all translation via online from etherscan.com is that possible?
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2answers
403 views

Does Ethereum Wallet need a separate update of Geth on a Mac

(1) When the Ethereum Wallet is upgraded to 0.9.3 and then opened, it prompts to upgrade to a new version of Geth. Although it's on a Mac computer, the Geth version it suggests is type "amd/64", which ...
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0answers
370 views

How come Go Ether and Ethereum Wallet both say 0 ether but Etherchain says .05? [duplicate]

When I try web3.fromWei(eth.getBalance("<My Account>"), "ether") I get 0. Also when I install and run the Ethereum Wallet, I see my account but it says 0. But when I open etherchain and input my ...
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1answer
2k views

Remove Ethereum wallet from Mac downloaded from GitHub

I'm looking to remove the Ethereum wallet I downloaded off of GitHub, from my Mac: https://github.com/ethereum/mist/releases ... I've pulled in the application to AppCleaner, in hopes that it would ...
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1answer
288 views

How to send several arguments to an solidity function using an array or a dictionary?

Sorry in advance for my english I am French :) I try to create a simple ethereum wallet. The idea is to allow the user to create a contract and to interact with it. I am using meteor, web3 and an ...
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0answers
180 views

Where does blockchain data come from if there are no peers?

I'm still having problems syncing. I've kept my client up-to-date, I'm using an SSD, and I have 1Gbps/1Gbps internet service. It just hangs with 270 blocks remaining forever. The logs say: INFO [...
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1answer
208 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 ...
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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 ...
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1answer
71 views

How to call a payble function in embark? When I am trying it is showing gas limit exceeds

when I am trying to call payble function in embark it is showing gas limit exceeds. Please tell me where I am wrong? ///////////////// Index.js: $('#buy button').click(function() { ...
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1answer
255 views

The transaction from (account name) to ('undefined' or account name) couldn't be successfully executed [duplicate]

I am trying to do some testing on Ropsten testnet but I cannot deploy contract or even send Ether. I get this error when trying to send ether: The transaction from "Main account (Etherbase)" to '...
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1answer
34 views

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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1answer
393 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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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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3answers
283 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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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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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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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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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
755 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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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, ...
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0answers
98 views

Ethereum Wallet starts up really slow and loses previously created contracts - private.net

I created a private test chain using geth:v1.6.6 and Wallet:0.9.0.1884 I used the link for Ethereum-Wallet-win64-0-9-0.zip versions 0.8.5 and earlier open in at most 20 seconds where as this version ...
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1answer
176 views

Compiler requests storage keyword which produces the next compiler error [duplicate]

I want to deploy a contract via Mist, but the compiler tells me to use the storage keyword: I tried many things including this one: pragma solidity ^0.4.13; //listing 1 contract Trace{ struct Tru{ ...
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2answers
127 views

Solidity opcode error when sending coin to an address

So I get the error below when attempting to send the coins to another address, and with the debugger, I can't figure out where's the problem. What am I doing wrong? (I just started learning solidity a ...
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1answer
664 views

How to get free testnet ether [duplicate]

I can't get free testnet ether. I tried already the faucet, I tried mining, it all does not work. Could someone maybe just send me some for some testing? 0x769d1Aab08dCF3F27289194896c0A41F7d51d412 ...
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1answer
128 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 ...
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1answer
43 views

How to make functions for other accounts available?

I am currently learning how to create contracts on how everything works. I am using the Ethereum Wallet which allows me to deploy contracts. I created there 2 accounts. I created a small contract: ...
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1answer
127 views

Can contracts be executed on PRIVATE-NET?

Using geth commands, I've created a private blockchain network and two accounts. Using Ethereum Wallet, I've also successfully mined ether using one of the accounts. However, doing any of the ...
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1answer
852 views

Ethereum Wallet also other currency? [duplicate]

Can I also save other currency like monero or dash in the Ethereum Wallet ?If yes I would really appreciate some guideline or advice
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1answer
26 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 ...
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2answers
31 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/...
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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 ...
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1answer
146 views

can't create token

I copy and pasted the coin code into the ethereum wallet contracts section - gave it a name and: initial supply: 10000 decimal places: 2 symbol: Kk When the contract gets picked up it has no name (a ...
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2answers
175 views

Can someone please send me some test ether…I want to do some research [closed]

My ether address is 0xf63F46629bA18F50E93c10F249b04662c60788cd You can use testnet to do the testing. Use the testnet faucet to get the Ether in testnet. Link is the following http://faucet.ropsten....
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1answer
152 views

Documenting an DApp components

I am new to building decentralized applications and i am trying to document the process of building an DApp. Waht are the components as well as installations that are needed to build An Dapp ? (if is ...
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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
90 views

How would I start for such a code?

How would one attempt to make a contract as the one drawn under: To elaborate, an ICO happens. The conditions of the ICO are that there are x amount of ICO tokens. x minus y amount is sent to a list ...
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1answer
27 views

Contract is failing on approve function in Ethereum with Solidity [closed]

My contract file is this http://prntscr.com/pvvkme. My Test file are these http://prntscr.com/pvvkme & http://prntscr.com/pvvlmg My migration file is this http://prntscr.com/pvvm5b My errors are ...