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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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2answers
240 views

Compile error when trying to import web3.swift

I am trying to import web3swift into one of my Swift files, but get the compiler error "No such module 'web3swift'". The import statements look like this: "Import Geth" "Import web3swift" In my pod ...
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2answers
414 views

Help-A-Noob-With-Ethereum-Wallet-Blockchain-Download

I'm on a 2013 Macbook Pro / 16 GB ram / 512 SSD / 2.3 GHz I just transferred 3 ETH from my poloniex account to the Ethereum Wallet on my local machine. The thing is, the entire blockchain hasn't ...
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1answer
45 views

What I need to verify contract with open-source license?

i m deployed contract in etherscan mainnet. i m verify it with open-source license like (MIT, GNU). now the problem were i don't know were to define license in etherscan ?? and etherscan will validate ...
7
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2answers
19k views

Is there a way to mine Ether on a Mac?

All I see is Windows and Linux support only, why is there no guide for mining ether on a Mac? Is there a way to mine on a Mac?
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2answers
390 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 ...
2
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1answer
670 views

How to create transaction signature for blockcypher ethereum API

The transaction signing process for the blockcypher ethereum API is explained here: https://www.blockcypher.com/dev/ethereum/#creating-transactions When their "addrs" endpoint is called, their API ...
1
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1answer
250 views

How to connect IPC and RPC to transact fake ethers?

I have setup 2 nodes, 1 on testRPC and the other on geth(using cmd and mist). How to sync both the nodes so that I can write a crowdfunding smartcontract for the accounts in both the private nodes to ...
0
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1answer
292 views

Import contract wallet

I am trying to import a contract wallet after having deleted all the data from my laptop. I have the keystore file so I am able to recover my main account (in theory this should give me access to ...
0
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1answer
260 views

How to download the whole transfer records of a token

I want download the whole transfer records of a token. https://etherscan.io/token/0xB8c77482e45F1F44dE1745F52C74426C631bDD52?a=0xd551234ae421e3bcba99a0da6d736074f22192ff. But the default setting is ...
79
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6answers
159k views

What is the total supply of Ether?

In Bitcoin, the total supply is capped at 21 million BTC. Is the total supply of Ether capped? How much will be mined before the Proof of Stake (POS) transition, and how will POS affect the issuance ...
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1answer
853 views

ETH stolen from two MEW wallets & moved to an unknown address & then to ShapeShift

I recently found out that my ETH funds were stolen from two MEW wallets and moved to an unknown address. Below are addresses of my two MEW wallets. 1) 0x16bf750Ee569F0A173BCCfD7b3F92F9Bb46c6AfC (...
0
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2answers
401 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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2answers
1k views

How to calculate an Ethereum Contract's address during its creation using the Solidity language?

Now I know and have read the other thread saying that a contract's address is created deterministically via RLP encoding the creator's address and his nonce and then hashed with Keccak-256 but the ...
1
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2answers
1k views

How to make full smart contract token?

I want to make my smart contract, but I have some questions. for example my new coin name is : Ghost and it's based on Eth. how much ETH should I have in my wallet to create this smart contract? ...
2
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2answers
85 views

Why does a mining reward exist?

I understand that there needs to be an incentive for the nodes to be keeping the blockchain up and running by validating blocks, and mining rewards is that incentive. I fail to understand why does ...
3
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1answer
425 views

Myetherwallet Insufficient balance for transactionGas limit set dangerously high. Approving this transaction is likely to fail

I'm trying to buy a cripto kittie that costs 0.0035 ETH which is around 3.14 dollars. I'm using my ether wallet for the transaction and when I set up the Gas Limit I get the following error on ...
2
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1answer
439 views

Error while refreshing pending block on main: Post http://127.0.0.1:8545: dial tcp 127.0.0.1:8545: getsockopt: connection refused

i have this problem : Error while refreshing block template on main: no mining work available yet https://github.com/sammy007/open-ethereum-pool/issues/387 this dident help https://github.com/...
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0answers
12 views

Can we treat/launch private ethereum chain ethers as a CryptoCurrency in Market?

Warm Greetings! I have a private ethereum blockchain setup on my server with multiple nodes , Also running mining software to mine blocks and earning private ethers (no value in market). Can i ...
2
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1answer
830 views

Ethos 1.3.0 drops hashrate on RX 560 4GB card

After upgrading my Ethos to 1.3.0 from 1.2.9, the hashrate of RX 560 becomes very low. Initially there was gpu clock problem error. After playing with the flags in local.conf, I was able to get rid of ...
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0answers
37 views

Can not tranfer eth with solidity and web3js

Error when I try to send eth from fontend react to smart contract and from contract I tranfer eth to another address but it error, when I try it in remix then it total work. I user web3js to call ...
0
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2answers
4k views

How do I connect My Ether Wallet to my Claymore Miner?

So I am very new to mining, and just recently picked up mining Ethereum rather than Bitcoin. I downloaded claymore miner, and created a wallet on MyEtherWallet.com. Everything seemed correct, I got my ...
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3answers
78 views

How do I make a smart contract send a message to a user along with a transaction?

Smart contracts can obviously send transactions through the Ethereum network but can they also send a simple message along with the transaction? Usaully you would put the message into hex code in the ...
0
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1answer
348 views

Ethereum Mining Hashrates fluctuate wildly

Hi, I've just set up a new rig and I'm having very variable hash rates, which I don't think are normal? System: * GIGABYTE GA-B250M-DS3H Motherboard * DUAL Nvidia GeForce GTX 1060 6GB x2 Running ...
0
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3answers
722 views

Token from Myethereumwallet to Coinbase

I want to turn my token from myetherwallet to real cash. How can I do that? So for example if I send my Civic tokens to Coinbase, will they be automatically converted to Ethereum and I can withdraw ...
0
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1answer
1k views

I sent PRL token to contract address instead of wallet address

I am wondering if i can recover the tokens. I sent PRL tokens to contract address 0x1844b21593262668B7248d0f57a220CaaBA46ab9 instead of myetherwallet address from kucoin exchange wallet. :-( Are ...
2
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1answer
554 views

How to get multiple values from one function contract to another

I have two contract and in first contract it contains a function which is responsible for returning two values, one of string and one of integer. function getUserData(address userAddress) public ...
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3answers
621 views

Deploy the ethereum contract token and transfer to other address using node js web3

Deploy the ethereum contract token and transfer token from one address to other address using node js web3.Anyone please help me.
0
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1answer
38 views

How big is the Geth Fast Node Currently?

I am trying to embark on getting all the contract addresses pulled from the Ethereum blockchain. From what I read, a fast node is all that is required for this (getting blocks->txns->contractAddress ...
0
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1answer
471 views

”:ENCODING/HEX: ODD LENGTH HEX STRING” error sending ETH [will pay 1 ETH bounty]

When I try to send Ether I get an error code that says:ENCODING/HEX: ODD LENGTH HEX STRING. Here the history, my PC had had issues working properly so I did a system recovery, then rebooted Mist ...
0
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1answer
797 views

How to track a transaction? (exchanger -> MetaMask)

Yesterday i sent some ether from my bitstamp account to an address I've created on MetaMask/Chrome. Bitstamp tells transaction done: Transaction ID (TXID): ...
3
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1answer
2k views

Generate Ethereum address from a private key

My question was first asked on stackoverflow but due lack of privileges I couldn't move it here directly. I am trying to generate an Ethereum address based on a given private key following this "How ...
2
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1answer
26 views

How to reach to one chain when hard fork is performed?

Assume that reward policy of Ethereum is changed from 3eth to 1eth. Hard fork is ongoing but, there are miners who don't consider updating their software. what happens? The miner who did update ...
1
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2answers
43 views

Get All Contracts from Blockchain

I am developing a large database of exploitable contract addresses and creating a website to host such a database for users to use to see if contracts are safe. Is there a way to get all contract ...
2
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1answer
416 views

Help transferring Ether Tokens using Parity

I configured Parity to trade Ether to BNT. I followed the steps here https://blog.bancor.network/how-to-trade-your-bnt-using-parity-6061dca37354 and funded my EtherToken Contract. This is the ...
2
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1answer
1k views

Problem with ether mining, stuck in DAG generation loop

i am completely new to ether mining, recently attempted to mine some ether using my desktop. I came across a comprehensive guide from this link: https://www.cryptocompare.com/mining/guides/how-to-mine-...
0
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1answer
329 views

How to cancel pending formation of wallet contract in Mist?

I have an (empty) account with no Ether in it yet. In Mist, I created a wallet contract since I thought I needed it to receive Ether. However, I know now that this is not the case. The wallet ...
0
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1answer
37 views

Can't transfer ether from contract to another contract ^0.5.0

I try to transfer ether from one contract B to contract A. But I get "Transaction mined but execution failed" Code: pragma solidity ^0.5.0; contract A { address payable public owner; uint ...
2
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1answer
3k views

Send ether from web3 to fallback payable contract function

I'm trying to send some Ether to the payable function of my contract and I'm unable to find/understand a resource to do so. Here's my attempt below: Web3 App file (simplified, without initialisation ...
1
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1answer
702 views

How to convert transaction's inputs to readable values?

I've got the following transaction's input: { name: 'trade', types: [ 'address', 'uint256', 'address', 'uint256', 'uint256', 'uint256', ...
1
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0answers
6 views

When use Nethereum C# Library there are many CLOSE_WAITs in TCP Stack at node side

When I use Nethereum methods (GetBlockWithTransactionsByNumber,GetBlockWithTransactionsByNumber and etc ) in loop, In TCP stack at node side accumulates a lots of CLOSE_WAIT. How can I fix this issue ?...
58
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8answers
42k views

How can I check if an Ethereum address is valid?

I've read many times that you should never input an address by hand unless you want to accidentally send Ether into no-mans-land. I'd like to know what those checksums might be. Is there a way to tell ...
0
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1answer
472 views

Loading smart contract x with tokens; sending eth to smart contract x; receiving tokens for that eth

Hello dear Eth community, I am a complete noob, please go easy on me ;) I am an IT teacher and I want to create a reward system for my class for a game that we play weekly. The game is not ...
2
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2answers
1k views

How to generate ethereum address derived from xpub in PHP?

How to generate ethereum address derived from xpub in PHP? I am trying to generate ethereum address similar like below link does for bitcoin. https://github.com/blockchain/receive-payments-demos I ...
0
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1answer
375 views

Why is the units of gasUsed in the transaction receipt 10^11 Wei?

I'm checking the balance of an account after a payable transaction in a Truffle test. Below is my code: // amount is the value supplied to the txn assert.equal(Number(String(currentBalance)), ...
4
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1answer
749 views

Events not being detected in Nethereum

I have a function in one contract that looks like this: //Events event RequestReceived(bytes s); event WorldCreated(bytes32 indexed worldName, address indexed sender, address result ); ...
0
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1answer
396 views

missing ether after uninstalling metamask

Lost my ether from Metamask when I uninstalled it and it did not show up when reinstalled...but it is showing on Etherdelta with the no private key error in red. How do I recover it please? I'm leery ...
0
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2answers
32 views

ParserError: Expected pragma

Hi guys. I have got one big problem. When i try to compile my code i'm getting some kind of unusuall error. I think everything is ok but when i try to "node compile.js" my main file ("inbox.sol") ...
4
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4answers
2k views

Ethereum Wallet on Testnet to mine

I have installed the ethereum wallet on widows. But my account ether balance is 0.00 ether. Then I started mining from developer network(Test only). But it shows nothing, I could not get any ether ...
4
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1answer
704 views

Call write function, which doesn't change contract value

I'm new in smart contracts and faced with one problem. After deploying contract to my test local blockchain network, i try to set new value via setter, after that I call get method of contract and it ...
4
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3answers
3k views

How can a transaction fail?

Given that a transaction has A high enough gas limit for the transaction to succeed A high enough gas price for it to be mined No contract calls that throws Is there any way that transaction can ...