Questions tagged [ether]

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

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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 ...
0
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1answer
130 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 ...
0
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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, ...
0
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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 ...
0
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1answer
152 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 ...
0
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1answer
101 views

How to make an ETH transfer from a contract that appears as an ETH transaction on the destination address?

I'm learning Solidity, and I've created a very basic contract that sends Ether from the contract to another address. My contract works, and ETH is being transfered (I'm on Rinkeby). ETH is subtracted ...
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2answers
141 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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0answers
21 views

Auction contract privacy

I have an auction contract, where bidders bid with Ether then me (owner) select which offer is most suitable and thus this bidder is contract winner. Once the winner is selected, I send him data as a ...
0
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1answer
151 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
15 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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votes
2answers
27k 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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3answers
186 views

understanding value on token transfer transaction

When a token transfer transaction has an ether price associated with it, is it fair to assume that that transaction used ether to buy the tokens? For example, this transacion triggered by account A ...
2
votes
1answer
95 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 ...
0
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3answers
42 views

Auction contract question - Ether lock

I have an auction contract, where bidders bid with Ether then me (owner) select which offer is most suitable and thus this bidder is contract winner. Once the winner is selected, I send him data as a ...
0
votes
1answer
52 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 ...
0
votes
3answers
137 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
167 views

Ganache not working

I am developing on a testnet on ganache and using remix. I am working with web3 and working on the user interface. when trying to fetch a function with web3/ganache, I get the following error: "...
2
votes
1answer
87 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 ...
1
vote
1answer
115 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 ...
0
votes
1answer
32 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 ...
2
votes
1answer
38 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 ...
0
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1answer
184 views

The use of ERC20 tokens in a private ethereum network

I am being told to use a private blockchain instead of the public one in attempt to cut gas cost. But I was hit with the problem of the value of ether and tokens in this private blockchain. I am ...
1
vote
1answer
20 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 ...
0
votes
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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1answer
33 views

I am trying to add ether to one of my ethereum account using smart contract

function Execution (address _from, address _to) { _from.transfer(price); _to.getBalance(_to) += price; } 1) I think it is duplicate but i gone through but nothing helped 2) I ...
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vote
1answer
136 views

How can i watch multiple smart contracts on server

I would like to create a sever that continuously watch the events of multiple smart contract at once. Sending me an alert via email when an event is detected. I understand that there is a web3.js ...
0
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0answers
25 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? ...
1
vote
1answer
43 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 ...
0
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1answer
125 views

Unable to send ether to account

I am trying to send ehter using this code web3.eth.accounts.wallet.add(privateKey); web3.eth.sendTransaction({ to:someAddress, from:onwer, value:amount*1, ...
0
votes
1answer
147 views

How can I use the fallback function to accept a payment?

I can't quite find the answer I'm looking for. The gas limit for the fallback function is 2300. Whether I call another method or set a variable, I blow WAY past the 2300 limit, rendering it ...
0
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0answers
9 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: ...
0
votes
1answer
108 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)?
0
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1answer
132 views

Unable to change contract data with nodejs (web3)

I created a contract, and deployed it into my private blockchain, as you can see I use mapping and dynamically allocated array. When I am trying to add a domain by 'addDomain' method with remix web ...
0
votes
1answer
65 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
33 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 ...
3
votes
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 ...
1
vote
2answers
136 views

Issuing bonds on Ether

Envisage the following scenario: You are running a business, which requires a float to operate. Your float is x amount of USD This float yields a annual revenue of a XXX amount of USD This float ...
1
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1answer
114 views

Question about sharding

I'm reading the white paper, more specific about scaling. I'm stuck on the second strategy. Second and more importantly, however, we will include an intermediate state tree root in the ...
0
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1answer
27 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 ...
2
votes
2answers
745 views

Ether Historical Price Data

I am looking for historical ether prices. There was a thread already discussing this enter link description here, however, I would like to get not only the prices available for Ether on Poloniex but ...
0
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1answer
112 views

Where to execute the code

I am new to parity and kovan-testnet. I have to verify my account in order to recieve keth. I am confused as to where to execute the following code: curl http://github-faucet.kovan.network/url --data ...
3
votes
1answer
283 views

Need to prove quantity/date of Ether Pre-Sale purchase for tax reasons

Lucky me - I bought 10000 Ether for 5BTC in the pre-sale and forgot about them until just recently. Yahoo! However, now that I've sold some at a profit I'm going to need to prove the date and quantity ...
1
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1answer
137 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.
0
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1answer
133 views

Transfer of funds from etherli to poloniex

I can not make the ethereum transfer from the etherli wallet to my poloniex wallet. The message is: "Please fund your user account with sufficient ether (~0.01 ETH / tx) for gas (transaction fees)" ...
0
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1answer
12 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 ...
0
votes
0answers
17 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 = ...
0
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1answer
21 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 ...
11
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5answers
15k 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 ...