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Questions tagged [ether]

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

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146 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 ...
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1answer
20 views

What happens when crypto is sent to my offline desktop wallet?

I'm planning a switch to a desktop wallet for my crypto accounts. My first choice is Exodus (exodus.io). I understand that because it's a desktop wallet, the machine it's running on obviously needs ...
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1answer
27 views

Using smart contract

Assume that the following contract has been deployed to Ethereum. Do I have to pay anything if I want to run it? contract NameRegistry { mapping(bytes32 => address) public registryTable; ...
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1answer
39 views

How to get ETH from Dwarfpool to Coinbase?

I have been mining Ethereum (ETH) using SMOS and Dwarfpool for the last few months. I was also using MetaMask to transfer my mined ETH coins to Coinbase. It was working fine until MetaMask pushed an ...
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1answer
56 views

Trustless Inter-chain transaction with Bitcoin- are there any flaws?

Let's say that Alice wants to send Bob 1 BTC, and in return Bob will send Alice 1 ETH. Alice's Bitcoin address is BTC_A, and Alice's Ethereum address is ETH_A. Likewise, Bob owns addresses BTC_B and ...
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22 views

trading a secret message with some person only after money is paid

I want to build a DAPP where person A trades a message with person B for ether. Since the message is secret, person A encrypts the message by using public key of person B and stores the message in ...
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1answer
114 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
49 views

Integrating Ethereum to facilitate transactions [duplicate]

I’m kind of lost on where to start with Ethereum. I would like an easy way to integrate Ethereum with my app. My main goal is to facilitate trades between users. There are 2 ways of doing this, ...
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1answer
434 views

How to find, whose ETH address it is? [closed]

Is it possible to get personal information of a person using his ETH wallet address? I did sell my ETH to one person, due to a technical glitch, multiple ETH transaction happened without my ...
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1answer
283 views

multiple transfer?

First of all, hello. we will write a token for a project we have developed. We are creating new tokens, we want to write a simple contract on remix ethereum. We will distribute a large portion of the ...
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1answer
179 views

How to hide/protect smart contract arguments

In Ethernaut level 8 you are given this contract to hack: pragma solidity ^0.4.18; contract Vault { bool public locked; bytes32 private password; function Vault(bytes32 _password) public { ...
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58 views

Remix and ganache-cli | Contract override

I have a problem when developing in Remix and using my testnet as a blockchain. I have a contract that connects through an interface with an standart ERC20 contract. Everything works fine until I ...
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1answer
55 views

Error while deploying contract

While deploying contract to ropsten tesnet (truffle migrate --network ropsten) I am getting an error: insufficient funds for gas * price + value ropsten: { network_id: 3, host: "...
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1answer
20 views

i have a problem in my wallet

where can I find out where I have created a wallet ? i opened through a website a wallet for eth but i forgot the website i opened the wallet through. Im mining on Nanopool website , here is the ...
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2answers
500 views

What’s the block reward for smart contract miners?

Maybe this is a basic question, but I can’t figure out what are the block rewards and/or transaction fees for miners of smart contracts . When talking about a cryptocurrency, the block rewards are new ...
1
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1answer
132 views

Best practice in 2018 to claim Ethereum presale purchase [duplicate]

I have the presale wallet and password, but went through a number of trials and just now trying to get back on my feet. I have yet to claim my presale and could really use it to help with medical ...
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1answer
773 views

insufficient funds for gas * price + value ropsten

While deploying contract to ropsten tesnet (truffle migrate --network ropsten) I am getting an error: insufficient funds for gas * price + value ropsten: { network_id: 3, host: "...
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0answers
54 views

Not able to access ropsten account

I installed ropsten testnet and created 2 accounts. "eth.accounts" returns the following: ["0x54eb2b021a26c17b83927ad14587a24b0bd16b66", "0x14e6b19304fb3c98a73acea5f80d2c056ee5c09f"] I wanted to ...
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0answers
123 views

How to set Derivation path (m/44'/60'/0'/0/0) in Android

I tried to use Web3j and created other demo also with different libraries. My problem is I want to set derivation path pf wallet.Or I want to find a place derivation path set in a code. Becoz it gives ...
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2answers
374 views

How to transfer Ether to ERC20 token contract?

I have a function that needs to make transfers to a token smart contract as well as personal accounts upon satisfaction of some conditions. function completeSale() onlyOwner public { if (...
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1answer
426 views

How get Ethereum address using phrase only in Android

I want to get Etherum address and private key by adding Phrase (or Password) everytime. I tried by following many gihub code.It gives different private key everytime. In Web3j, I found it is based on ...
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0answers
37 views

Pulling ETH-BTC quotes from coinbase programmatically [closed]

I am using the coinbase 2.1.0 python api to pull prices. I have been able to pull BTC-USD prices but not ETH-BTC. My code is: from coinbase.wallet.client import Client api_key = "" api_secret = "" ...
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2answers
164 views

Architecture for Dapp

I have been working on a dApp where a user can create contests and set attributes of contest like contest start date, end date, no of players, entrance fees etc. There can be N no of contests running ...
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0answers
74 views

Ethereum Address genration gives new address and new private key everytime in Android

I am using 'org.ethereum:geth:1.6.5' dependency. I am trying to follow github code of https://github.com/ethmobile/ethdroid .I found it gives every time new private and address. I want to have same ...
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1answer
557 views

what is difference between “gas” “gas price” and “fee”?

Can we say that gas is the unit of transaction fee ? And gas price is the same transaction fee ? If so, why we do not use ether and wei instead of gas ?
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1answer
106 views

How do I send out of etherscan [closed]

I sold zrx in binance and sent it to my ethereum address in coinbase. My coinbase account was blocked so when I went back to binance at the bottom I clicked and it showed the sale with the money ...
2
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2answers
752 views

Async with getAccounts

I'm working on a simple project. Part of that requires retrieving accounts from the web3 provider asynchronously (so that they can be used as variables in the code of my frontend). My initial ...
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0answers
22 views

Parity send local without fee

I created some accounts on my computer use Parity. I'm sent ETH to this accounts. Now, i want move all balance of all accounts to new account without fee. I can? Of course, the new account in local ....
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0answers
29 views

What happens if the “balance” of the address which sends “address.transfer(amount) is ” zero "?

Consider the balance of the address that sends address.transfer(amount); to receive the amount is zero. For example we have following address with balance of zero: web3.eth.getBalance('0x123').then(...
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1answer
61 views

Is there any way to fix my mistake when setting up a Multisig wallet?

So I am an idiot... I know. But feel free to tell me I am. When I set up my Multisig wallet with gnosis I made a fatal error. I created a Rinkeby Test wallet. I did a test transaction and it all ...
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1answer
592 views

how can i find the contract name from the address using the etherscan API?

I have the address but I want to know the name of contract. Is there any way to get that from the etherscan API?
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1answer
332 views

How to use the zksnarks capability of Ethereum?

Simple question but I couldn’t find the answer anywhere… How to use the zksnarks capability of Ethereum in order to perform fully Anonymous sending of Eter from one wallet to an other one ?
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2answers
1k views

Go Ethereum - get the enode before starting geth

I need to get the enode of my geth nodes before I start them up.. is there any way to do this via a command other than actually starting up the node ?
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0answers
19 views

Why is my transacton still showing pending

I created a ether transaction to add my my nation to bitnation. I set the gas required as more than what was needed. It's been 3 days and my transaction is still in pending state. What could be wrong. ...
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1answer
19 views

Dynamic Arrays of type memory

Are the dynamic arrays of type memory fixed sized. I have read that the arrays of type memory are fixed sixed. Thanks
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2answers
521 views

What is calldata?

What is calldata? I learned that there are three types of memories: Storage Memory Stack In the Ethereum docs, it says that the function parameters are of type memory by default. However, I've also ...
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2answers
218 views

Is it possible to transfer Ether without a contract, like with Bitcoin?

I realised I don't know if Ethereum is exactly like bitcoin with an added dimension (smart contracts), or if there are things that Bitcoin can do "natively" that Ethereum can't. Is it possible to ...
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1answer
146 views

Ethjs-contract package providing transaction related error when calling get function

I am integrating MetaMascara to my lottery DApp. HTML <script src="https://wallet.metamask.io/metamascara.js"></script> <script src="/javascripts/ethjs-query.min.js"></script&...
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1answer
56 views

Is the Ethereum blockchain a list/chain of transactions or a list of contracts?

Ethereum newbie here with some general programming knowledge including basic Solidity. Below is my current mental picture of how Ehtereum works (please correct me if wrong). A contract is a class (in ...
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2answers
316 views

Automatic transfer of ETH

I have an Ethereum wallet address (the public key is known by other people). I periodically receive payment on this address (and cannot change it/receive to other address). I need: When I receive a ...
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1answer
115 views

Possibility of transferring “real funds” and “real ether” on “ testnet ”?

According to THIS ANSWER (by user "eth") : (1) Testnets are "play money" so that you can try out applications without spending real money. And According to THIS WEBSITE : (2) Tobalaba ...
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1answer
55 views

Pending Transaction from locked token

I tried to send locked EOS to Etherdelta, and the transaction been pending for almost 4 days now. MEW can't find the transaction so I'm unable to cancel it nor do anything else even with higher gas ...
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0answers
52 views

Working of BlockApps STRATO

I have started working in blockchain for the last few weeks. I have created a DApp using geth, web3 and private blockchain network. I tried to host my DApp in aws using BlockApps STRATO. I am ...
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0answers
42 views

Mining node stops working frequently

hello guys, i have created a private Ethereum blockchain network on Microsoft azure which has one transaction node and two mining nodes with configuration-For transaction node the ram is 8gb and one ...
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0answers
29 views

Parity Ether - Combine money all accounts to one account

I used Parity, and create some accounts. Now, I want send all money to one account on my server. I still charge fee for transactions? Is there any other way?
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1answer
46 views

Access DApps publicly

I have created my own private blockchain network in LAN.I am using admin.peer() function for adding a new peer to network,for this admin.peer function to work I need an IP address.So my question is ...
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1answer
158 views

How to make batch transaction in ethereum using web3.py

I want to make batch transaction in ethereum using the web3.py. I found web3.createBatch() in Web3.js, but i can not find it on web3.py.
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1answer
38 views

The funding goal has not been reached? [duplicate]

The previous question remained unanswered, which is why I am asking again ! Whether I will be able to withdraw the funds if the funding goal has been NOT reached, BY TRIGGERING this functions; ...
2
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1answer
91 views

Can I rely on the fact that 'address(this).balance >= msg.value' is always true?

To my understanding, at the beginning of a payable function in a contract, an amount of msg.value ether is added to the contract's balance. Therefore, the expression address(this).balance >= msg....
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1answer
25 views

I have done simple data transaction on ropsten, it's stll increasing blocks confirmation

Why there are so many block confirmations in small transaction? How blocks are working while transaction?