Questions tagged [ether]

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

250 questions with no upvoted or accepted answers
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322 views

What is the current size of the Ethereum State?

What is the current size of Ethereum's state in bytes? I am not asking about the size of the blockchain with blocks headers, transactions and receipts. I am looking for the size of all the structure ...
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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 ); ...
4
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1answer
701 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 ...
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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 ...
3
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1answer
447 views

Ganache (UI) save blockchain

I am running a testnet on Ganache UI. But when I deploy a contract and close and reopen ganache, there are no blocks and the contract deployment is gone. Is it possible to save/load a blockchain ...
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 ...
3
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2answers
333 views

Will not a PoS implementation converge in a much less wealth equally distributed system?

With the current trends of prices in crypto and the long term vision supported by the community (HODL!), the implementation of Proof of Stake could eventually derive in big ETH stakeholders getting ...
3
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1answer
699 views

Smart Contract with stable coin

Is there any stable coin, which can already be used with smart contracts? If not, is there a possibility to exchange a stable coin in real time into a smart contract feasible coin like ETH by help ...
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0answers
1k views

How to encode data payload in ETH transaction

I'm using python to sign and send ETH transactions, and would like to do the same for ERC-20 token transactions as well. I'm having trouble correctly encoding the data payload to invoke the transfer ...
3
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1answer
292 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 ...
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0answers
1k views

Issue won't allow this transaction (Smart contract)

•Windows 8 •Mist 0.8.9 •Tesnet When I publish my crowdsale smart contract and try to send ethers,i have this warning
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0answers
68 views

Issues Retrieving REP tokens

So I'm trying to retrieve my REP tokens, yet the JSON key backup that I pull out of my library/ethereum/keystore folder throws an error in the Javascript console saying "your key is not the proper ...
3
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0answers
159 views

Help with Withdrawal of ETH from TheDAO Withdrawal Contract

I obviously screwed up when attempting to convert TheDAO to ETH using the DAO withdrawal contract. I sent my DAO tokens to the withdrawal contract address http://etherscan.io/tx/...
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0answers
28 views

Ethereum - Exporting Accounts/Balances from full node

I have a Ethereum full node that I will be using to take a snapshot for an airdrop for a project I am working on. The node is running and syncing. The issue currently is that there doesn't seem to ...
2
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1answer
56 views

Ether in ERC-20 transactions?

I have one contract that I give tokens from a ERC20 contract implemantation. When I call the balanceOf function from the Token conract. Response me that I have x Tokens. Nice !! But when I try to ...
2
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1answer
149 views

Issues sending Ether with web3j

Hello guys I have search around but no reasonable explanation as to why i would get these exceptions, I have already requested and have 3 ethers with associated with my address. Here is my code for ...
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0answers
76 views

Can we use Ethereum Swarm to store normal data other than blockchain or dapp data.

I want some basic data to be stored like name and city phone no etc.So just want to ask can I use ethereum swarm just to store file and make several node to create decentralized storage.
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
133 views

Send ERC20 Tokens from Fixed Supply Token Contract to TokenCrowdSale Contract

For ICO Crowd Sale I have created 2 contracts one is MyToken.sol & other is MyTokenCrowdSale.sol. MyToken.sol creates fixed supply ERC20 tokens. contract MyToken is DetailedERC20, StandardToken { ...
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0answers
395 views

Retrieved hash chain is invalid

I get this error 4 times. about currentBlock: 4350000, highestBlock: 5656749 This real network, not test. The memory on my machine is not full, restart does not solve the problem logs May 22 09:...
2
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1answer
127 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 ...
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0answers
1k views

Web3 - how to send transaction with some data and include Ether at the same time?

Using web3 0.20.3 I want to call function and send some Etherium at the same time. JavaScript Contract = web3.eth.contract(ABI); Instance = Contract.at('0x162b74ea16da6ae9d7f7b349eaeab2fcadf4e835')...
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
77 views

Truffle - Stub contract functions in Mocha

How do I stub out contract functions while testing in truffle in javascript. Normally in mocha I would import sinon and do a sinon.stub command. It doesnt seem that I can import npm modules into the ...
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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 ...
2
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1answer
226 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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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 ...
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 ...
2
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3answers
147 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 ...
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0answers
78 views

Did the original Ethereum ICO have a different BIP32 word list?

I have a 12 word seed which I believe should be BIP32 compliant and I think is from the original Ethereum ICO. It was in an email sent to me (by myself) on 10th July 2014 - which was CoinSummit ...
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0answers
421 views

Token contract and crowdsale contract deploy

I am Testing with an Ethereum Based token contract and i would need some help deploying the Token contract and Crowdsale contract. I already have done this, deploying booth contracts and allocating ...
2
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1answer
668 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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0answers
137 views

Read function returning blank array in geth

I have deployed a smart contract on geth which has 2 simple read, write functions in it. Then I called the write function; e.g. payment.place_order("Laptop", 10,{from:eth.accounts[0]}). After the ...
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0answers
99 views

Parity 1.7 [-32601] Method not found CLOSE

I just upgraded Parity to 1.7. The syncing with the Foundation chain has not completed. I decided to create a new Account while the syncing was happening. I am using the browser interface. Everything ...
2
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1answer
93 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 ...
2
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1answer
205 views

Is smart escrow with ERC20 tokens fit for below scenario?

I am planning for ICO, which provides services. User need to invest some x amount of money to buy token.After buying token their will be a grace period for 10 days to generate revenue and expect ...
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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0answers
341 views

Can I use geth light sync for mining purpose

Iam new to this, I wanna start mining ethereum, I have tried over 5 times to fast sync geth, with ethereum wallet and failed to do so, as it would get stuck, sometimes my pc froze, would take days ...
2
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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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0answers
87 views

Can I get back lost ETH in splitting attempt?

Please can I have some info if I can get my lost ether back. I had eth in presale wallet. I imported the presale json file on Ethereum Wallet 0.8.9. That created a new wallet with correct amount of ...
2
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0answers
397 views

Can't see GPU when starting with rc.local (Linux)

I'm mining ethereum on my Linux Mint mining rig with the claymore miner. I can manually launch my miner with the command line but if I try to start the miner with /etc/init.d/rc.local then I get the ...
2
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2answers
781 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 ...
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0answers
188 views

Can't deploy contract, does not recognize my 1 ETH

The console says: We can't estimate your gas usage properly, because you need at least 1 ether in your account Select fee is frozen. There is one ether listed at the top of the console.
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0answers
536 views

Mist started re-syncing and ethers are gone

I downloaded the blockchain with geth --fast --cache=1024 option and size of my blockchain data after download of 2412706 blocks was around 10.9GB. I imported my accounts to keystore files and ...
2
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0answers
82 views

Mist 0.8.5 & Geth 1.5.0

Current Mist is 0.8.5 and it runs geth 1.4.17. How can I initial geth 1.5.0 by Mist 0.8.5 without manually start Geth 1.5.0 first ? It's all to do with instruct geth that chaindata is on an external ...
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-...
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0answers
176 views

How to identify database of Ether

After reading wiki, I understand Ethereum is a programming platform to develop different blockchains. However, there seems to be one Ether currency that is traded on exchanges. How to identify that ...
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0answers
507 views

Ether.li Wallet lost?

I created a Ether.li wallet but missed to press the finish button on the page where you note your keys. Then i transferred money to the wallet which was not saved. After i got on the Ether.li hompage ...
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0answers
107 views

Where was the example web app to send Gavin Ether?

I once found an example webapp where you could send Gavin ether through a webform. Anyone know where it was?
2
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1answer
382 views

Generate addresses using xpub

I have a cold storage where I installed BTC-Electrum and LTC-Electrum wallets. So I have took extended master public keys and have generating addresses in my online service. Now I want to generate ...