Questions tagged [ether]

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

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eth.getBalance(eth.accounts[0]) Shows me 0 balance

I am using geth on windows with 1.9.10 version. I used geth --rinkeby --rpc --rpcapi="personal,eth,network,web3,net" command for launch my geth. I am on the Rinkeby testnet, i already transfer 3 ...
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Getting revert error on transfer ether to wallet address

hi i m calculate the ether value with token price and quantity of tokens and than sending calculated ether value to seller account but i am getting revert error on remix at escrow.originatorAddress....
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Exiting out of a smart contract early?

Basically i want to have a smart contract that can allow users to exit early under specific conditions. Does anyone have any resources for this or know whether its possible?
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How i can exchange the erc20 with ether

i want to make crypto to crypto smart contract where i need to sell erc20 token and on buyer side i need to calculate the price which i have to send to seller and i have a price of token can you ...
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How to calculate the token price of already deployed ERC20 tokens

I am creating a smart contract, so inside that I have to pass the token in contract and the value of ether will be calculate on behalf of token price please help.
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How to Open console In geth 1.9.10

I am currently using geth in windows and 1.9.10LTS version of geth. I have to Open geth console, but when i try to implement geth console or geth attach or geth attach ipc:\\ .\pipe\geth.ipc it doesn'...
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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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192 views

Can't send ether to crowdsale contract (fail) + infinite gas bug on Remix

I'm a newbie trying to make a crowdsale contract in Ropsten (deployed a token contract very well before) but i meet some problems : I can't send ether to crowdsale contract, returning a fail status ...
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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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Ethereum wallet/Geth incredibly slow to sync, help?

So I've noticed some people having the issue similar to mine, entitling their post as "very VERY slow to sync" and other variations of that, however they're complaining at around 100 blocks every ...
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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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387 views

I cannot send ETH from my blockchain wallet

Yesterday i have Transaction {Dropped & Replaced) https://etherscan.io/tx/0xfdca0e5c597f0a3f298afd5d56e939a8cefc10117df6b22d5342e1b6d5803caf I saw it Replaced by TxHash:...
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869 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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1answer
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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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275 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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2answers
419 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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255 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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Store and Display the Json file in Blockchain

I have stored my data on firebase, and taken as a JSON file, the JSON should be separated and display into the webpage through the Ethereum blockchain, for example: { product: "Shoes", prize: "85"...
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1answer
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Invalid number value when deploying contract using truffle? But how to fix it in code is the value or _amount variable ?i cannot figure it out

2_deploy_contracts.js Replacing 'OraclizeTest' Error: * Deployment Failed * "OraclizeTest" -- invalid number value (arg="_amount", coderType="uint256", value={"from":"...
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2answers
419 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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296 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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650 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
701 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
251 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
32 views

Why function that does transfer without a mapping fails?

This might be a basic question, but still dealing with conceptual stuff about ethereum and solidity. Original question was: How does solidity send() & transfer() know about contract ether? ...
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Web3JS: How to Identify that a given transaction was send with either “ERC Token” or “Ether” in value

I'm working on a Smart Contract and it almost ready. To watch transactions I'm using web2js on my server and its working fine. But from a transaction detail how I get confirm that given transaction ...
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2answers
90 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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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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455 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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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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Insufficient funds for gas * price + value web3 sendSignedTransaction

My wallet balance is 3.994937 RIN and I have set value (to be sent) to 0.00005 RIN (50000000000000 Wei) and I have set both gasPrice to 5208 (21000)and gas Limit to 5208 (21000 Wei). ChainId=4 ...
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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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1answer
505 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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Gas estimation failed on remix

Cannot deploy the code, it compiles normally on version 0.4.22 with the same compiler version. I have looked at the answer on a similar thread and changed version to 0.5.11, when I try to compile it ...
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1answer
883 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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1answer
1k views

My friend sent me a screenshot of a transaction hash, but when I search for it I find divergent data. What happened?

This is the transaction hash: 0x90e923ee01d9dfeb95ee176819eeec67d247fc6cb009c8cdc4d8ae1939e5ecc6 And this is the screenshot my friend sent me: If you check the hash in Etherscan, some informations ...
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355 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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1answer
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Why do transaction receipts not include the value of Ether transferred?

I'm writing some logic to identify the currency used in an ethereum transaction, and am wondering the following: web3.eth.getTransaction returns a value field that indicates the value transferred in ...
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1answer
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ParserError: Expected identifier, got 'LParen' in Remix simple auction using Solidity

The line highlighted in the error is require(bid2 > highestBid2); The code: pragma solidity ^0.4.22; contract SimpleAuction { address public beneficiary; uint public auctionEnd; ...
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734 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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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 ...
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3answers
10k views

Running out of gas when sending ETH from MetaMask to Poloniex

I tried making a eth transaction to poloniex. However, I keep getting the error that I ran out of gas. How can I avoid this? Do I have to keep increasing the GWEI? Until what number? Here a ...
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1answer
421 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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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
818 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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How to start Geth at boot (Raspberry) and interact with it

I want to use a raspberry for IoT. For this project I need to start Ethereum (Geth) at privat chain in the boot state. When I have some data, I would like to make a transaction (contract) to store ...
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2answers
1k views

Ether missing after Etherli transaction, Internal Transaction?

I'm new in this world and already have a problem with my ETH, hope someone can help me.. I used the wallet of ether.li but saw another wallet for my phone. So I did a transaction of 2ETH from Etherli ...
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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 ...
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1answer
403 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)), ...
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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 ...