Questions tagged [ether]

Ether (ETH) is the main internal crypto-fuel of Ethereum and is used to pay transaction fees.

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68 views

Not able to send Ether to contract

I am trying to send Ethers to a contract deployed on Ganache but I am getting VM Exception while processing transaction: revert, the same logic is able to transfer Ethers to other account. Following ...
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Ethereum, eth_getBalance always give 0 for the latest transaction on fast syncnode [duplicate]

I started syncing ethereum core on --syncmode fast on July 5th, 2019. As far as i know and read, fast mode will sync the latest blocks and transactions. Then yesterday, I did one transaction of X ...
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2answers
130 views

How to dynamically load contracts data with their ABI from etherscan API?

Im wanting to pull data from a smart contract I've loaded via user address and etherscan API for the ABI. But how would I go about programmatically adding all the functions from the ABI into my ...
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1answer
115 views

Private key use cases in ethereum blockchain while transferring the amount between two crypto exchanges

I was studying about the application of public & private key in cryptography. I've worked on MetaMask (Ropsten test network) and I know that how to transfer the amount from one account to another ...
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28 views

ERC-20 Token Transfer Error (Unable to locate Corresponding Transfer Event Logs), Check with Sender

EtherScan.io is showing error: The ERC-20 Token Transfer might have Failed (ErrCode: unable to locate corresponding Transfer event log), check with sender. Transactions are successful and the ...
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1answer
34 views

How can I send ether [duplicate]

Hey guys I am a beginer on Solidity. I write a function and try to send ether on remix accounts and check balances this accounts. But I can't connect accounts I think because when I check balance of ...
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1answer
165 views

Pull payment for automatic payment transfer.

How can I program my wallet such that all Ether sent to it is immediately and automatically transferred to my other wallet within a minute.
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60 views

Withdraw functions implementation

I'm writing a smart contract where subscribers make a bid, post doing so owner selects one and sends him data as well as ends the contract. If data is valid, winner releases the funds so owner can ...
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2answers
154 views

Why the Ropsten test net I created have old transactions?

I created Ropsten testnet account through Metamask. But in Etherscan, it seems that it is already used account, because it has some already made transactions. Why this happens?
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2answers
31 views

Self Ether transaction

Hi placed a self Ether transaction by error, where did the Ether go? can I recover it? https://etherscan.io/tx/0xd64133abcd2205e76b8241af11bb081c23ce7e77016ec03660cc09a8866c9317
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0answers
14 views

Difference between UTXO based smart contract and Account based Smart contracts [duplicate]

I want to understand the difference between UTXO based smart contract(Bitcoin scripting and Komodo's CC) and account based smart contract (Ethereum). What are the different pro and cons for these two ...
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1answer
94 views

Testrpc withdraw function does not work

I have a very simple contract with a withdraw function. contract PayTest { function() public payable { } function withdraw() { msg.sender.transfer(4000000000 wei); } } When I try it in the ...
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1answer
205 views

Is smart escrow with ERC20 tokens fit for below scenario?

I am planning for ICO, which provides services. User need to invest some x amount of money to buy token.After buying token their will be a grace period for 10 days to generate revenue and expect ...
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58 views

ALERT: Transaction Error. Exception thrown in contract code

I get the this alert from metamask . I have create a dapp and i have deployed the contract with truffle on my private ethereum (geth)network and i have connect an account. I have put in the truffle-...
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1answer
73 views

Are most ICOs based on Ethereum's Smart Contracts or other technology?

where can I find an overview of the technologies that blockchain startups use? Are most ICOs based on Ethereum's Solidity Smart Contracts, creating a simple ERC20-compatible token? Why are the ...
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1answer
16 views

Gas cost for contract transaction called form external

If I call my contract and ask it to send x amount of ether to another account y, I know i have to pay a transaction cost. Will the contract also have to pay any amount while sending the ether to the ...
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1answer
699 views

Smart Contract with stable coin

Is there any stable coin, which can already be used with smart contracts? If not, is there a possibility to exchange a stable coin in real time into a smart contract feasible coin like ETH by help ...
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2answers
3k views

Is it possible in theory to generate the private key for the 0x0000000000000000000000000000000000000000 wallet?

Is there any chance, although extremely low, to generate the private key for the 0x0000000000000000000000000000000000000000 wallet? Does the system allow it at all?
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3answers
2k views

Transfer Ether from my wallet to another wallet

I have a wallet at MyEtherWallet.com . Is there any API which allows me to transfer Ether from my account to different accounts ? Does MyEtherWallet provides any such API's ? I saw the documentation, ...
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1answer
104 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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1answer
168 views

how to watch the eth address with infura

our project now uses scheduled task to query the eth address with infura API to get its balance every 10 seconds but as the number of addresses keep increasing, the efficiency is very bad. Is there ...
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1answer
89 views

install ethereum wallet on local computer

I want to be able to transfer ether from an online exchange to a private wallet on my local computer. How can I install a safe standard wallet? Do I need to install ethereum blockchain first? If so, ...
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1answer
71 views

Need recovery of original JASON file for 3000 ether

Is it possible to have your original JASON file you were sent in the Pre-sale re-sent. I have the password, but the file was never saved on my hard drive and my emails were deleted. The link was ...
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1answer
159 views

Transfer a fixed value of ether

pragma solidity ^0.4.19; contract Test { address one; function Test(address _one) public { one = _one; } function send1() public payable { one.transfer(10); } function send2() public ...
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163 views

How Does Exchanges Implement Gas Fees for ERC20 Tokens

Any crypto exchange like binance, bitfinex and so on let you deposit and withdraw various ERC20 tokens. Technically I don't understand how they implement gas fees when I withdraw? I deposited 100 ...
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1answer
184 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?
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1answer
18 views

Parser Error - Creating EIP20 Tokens

function transfer(address _to, uint256 _value) public returns (bool success) { require(balances[msg.sender] >= _value); balances[msg.sender] -= _value; balances[_to] += _value; emit ...
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2answers
28k views

Is Ethereum wallet address case sensitive?

I sent some amount of ETH to a wallet. I checked the wallets balance on ether chain. I entered the address in the search field and noticed both lowercase and uppercase versions of the address seemed ...
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1answer
127 views

Ether balance on Metamask doesn't change after selling tokens

I create a smart contract successfully using Remix IDE , Metamask and Ropsten for testing. I want to sell some tokens using Sell function, so I specified the value "20" for Sell function ,my initial ...
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1answer
171 views

How to connect Trust Wallet in Javascript?

I want to use TrustWallet for payments in my project for mobile users. I saw the documents related to TrustWallet web3 API but not getting how to use it in javascript. Can anybody help me with the ...
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3answers
164 views

Error when trying to add a payable function in erc20

Most of the ERC20 examples on the internet have this function: // ------------------------------------------------------------------------ // Don't accept ETH // --------------------------------------...
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1answer
93 views

Watching the transaction of an external account using smart contract

Is their any way to execute a function of smart contract whenever a transaction to a predefined external account occurs? I mean if someone transfers some ethers to account A, a function of a smart ...
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1answer
123 views

Easy send Ether to multi address?

How to tranfer ether to 100 address easy? Im try ing wallet contract and multisend ETH with myetherwallet.com but not working.Ether tran to Wallet contract but not send to other address. Other method ...
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1answer
88 views

How to test the fuctionality of a Bittrex-related smart contract?

I've got my hands on a smart contract related to the Bittrex exchange. I would like to deploy this smart contract to test the functionality but I don't know how to call the functions properly. My ...
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1answer
158 views

How to pay gas fee for new addresses of ERC20 tokens that initially have 0 Eth balance? [duplicate]

I have a confusion, When we create new address/account for an ERC20 token then it have 0 Eth balance. When we send some tokens to this address and then withdraw token again from this address require a ...
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1answer
35 views

I've given Gwei less than 0.1 for a transaction, and it's been an hour, and it is not showing up in etherscan!

I know I pretty much messed up with Gwei, I've given it < 0.1. My doubt is if the transaction gets failed will the funds get back to my wallet or lost forever and how much time will it take for the ...
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1answer
275 views

ShapeShift.com Phishing - I lost 67 Ethereum - What do I do? [duplicate]

I fell for the shapeshift.com scam which provide a false ETh wallet address and they basically steal your ETH. The real website is shapeshift.io Here is more information on the transaction: https:/...
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45 views

Rinkeby ethereum block stuck at 4321234

I'm trying to sync rinkeby using parity with patch to support rinkenby but now it's stuck at block 4321234. Does anyone have solution to pass that block without having to resync from the beginning? ...
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1answer
47 views

Three questions

I have recently become interested in crypto and after much reading on Ethereum I still have three burning questions that perhaps some of you can help with. Apologies in advance as some of these might ...
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13 views

Ethereum Boardcast shows error: non-canonical integer (leading zero bytes) for *big.Int, decoding into (types.Transaction)(types.txdata).S"

I meet with a problem, does someone can help me how to deal with leading zero in raw-transaction? My raw transaction is: ...
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1answer
109 views

Use ENS with MyEtherWallet.com

When starting an auction for an .eth address on MyEtherWallet.com am I automatically placing a bid on the address or do I have to manually place a bid afterwards (and pay 0.01 ETH AGAIN)?
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1answer
351 views

Create an ERC20 Stablecoin [duplicate]

How to create a stable coin with an ERC20 token contract ? Does it require contract to be modified ? Are there some good practices or standards ?
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0answers
50 views

How and Why other should buy and sell my ICO token? [closed]

When I invest or create a token, I am hoping someone in the future will want to buy it at a higher price. Why would anyone buy my tokens to use the platform if the price of the token keeps increasing ...
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2answers
2k views

API to gather list of top token holders

I working on a Ethereum project and I would like to gather a list of top X (20 for example) Ethereum accounts. This would behave similar to etherscan.io (https://etherscan.io/accounts) Is there an ...
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1answer
35 views

Minable crypto contract

How can I create mineable cryptocurrency using ERC20 token? Do I need to code it using smart contact or need to do something else. Also I want my personal node where will be running my Ethereum node ...
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1answer
30 views

Launch ERC20 token [duplicate]

I have implemented the ERC20 interface and the token is ready. Next step is to list it on an exchange like kraken. What is the process ? What determines the initial value of a custom token ? What will ...
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22 views

DeclarationError: Undeclared Identifier. Did you mean “_data”? data = _data ^__^. All i want is to create a cryptocurrency

pragma solidity ^0.5.1; contract owner { address public owner; function owned() public { owner = msg.sender; } function set( string memory _data) public { data = ...
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1answer
30 views

3 level ether transfer

contract foster{ vulnerable v = new vulnerable(); attacker a = new attacker(address(v)); constructor() public payable{ // a.deposit(address(v)); // transferring 3 ethers to ...
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5answers
16k views

send ethers from one contract to another

I am wondering how can I have ethers in my contract. I have 2 contracts associated with different accounts. I want to send ethers from one contract to another but how do I have ethers in my contract ...
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1answer
16 views

Why did cryptokitties congest ethereum network when it has resizable block size?

So I am wondering how come eth network got congested when block size is resizable and it can take more trx if needed? I am reading some info that it can do that but miners don't want to do it as it ...