Questions tagged [ether]

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

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1answer
222 views

Does it make sense to have a Node.js backend serving json to frontend for dapp?

Currently, the architecture I am looking at is that the smart contract (SC) sits on the ethereum network, but it is a complex and multilevel contract system. Just navigating through the tiers of the ...
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3answers
6k views

How to view custom token balance in ether wallet using web3

Hello I am newbie to cryptocurrency. I have created my erc20 custom token. Now, I want to create an API to view the balance(in my token as well as in ethers) using web3 and node js.Can someone please ...
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2answers
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Transaction stuck in “Pending”

I've sent some ETH from the Ledger Live app to an exchange but I only used 1 Gwei and now the transaction is pending. It's been 20 hours. Will the transaction run out of gas eventually or will it go ...
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1answer
1k views

Web3 sendSignedTransaction Transaction cost

I'm new to Ethereum world. I've just manage to create an example that calculates transaction fee and sends a signed transaction without a contract using Web3js library. My issue is that my test ...
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3answers
276 views

How do I transfer Ether from multiple account to one account?

I have a vast amount of Ethereum wallets, all packed with Ether. I need to transfer all the Ether to a single account. I don't want to do it manually. Is there a way to script it or use a smart ...
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1answer
481 views

Remix is compiling the smart contract but not solc command

I am able to successfully compile a smart contract in remix IDE. However when I try to do the same with solc npm command, it shows a JSON error when compiling. Voting.sol pragma solidity ^0.4.25; ...
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2answers
230 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
38 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 ...
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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
374 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
659 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 ...
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1answer
245 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 ...
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1answer
291 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 ...
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1answer
249 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 ...
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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
848 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 (...
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2answers
385 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 ...
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2answers
679 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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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? ...
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2answers
80 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 ...
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1answer
422 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 ...
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1answer
434 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
10 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 ...
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1answer
818 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
35 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 ...
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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
42 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 ...
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1answer
345 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 ...
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3answers
717 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 ...
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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 ...
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1answer
542 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
614 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.
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1answer
33 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 ...
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1answer
458 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 ...
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1answer
796 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): ...
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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 ...
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1answer
37 views

method personal_signTransaction not supported

Good Time I'm trying to test a smart contract in local ethereum wallet with connecting to the ganache-cli but when I try to create a wallet contract it gives me an error: method ...
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 ...
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2answers
42 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
415 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 ...
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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-...
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1answer
326 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 ...
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1answer
32 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 ...
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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 ...
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1answer
690 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', ...
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0answers
5 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 ?...
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8answers
41k 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 ...
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1answer
469 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 ...