All Questions
228 questions
4
votes
2
answers
3k
views
What gives ether it's intrinsic value? [duplicate]
Trying to understand how ethereum and blockchain work. I keep hearing that miners are needed to do the computations to unlock a block (don't know if that's the correct term).
My question is this: ...
- 201
3
votes
1
answer
4k
views
Add user details to smart Contract
What is the best way to store users data on smart contract? Suppose we have n number of users and we want to store each username and his other details, should we have to create a smart contract ...
- 155
2
votes
2
answers
1k
views
Which accounts contributed to The DAO's extraBalance account?
Anyone who bought DAOs in the last two weeks of The DAO crowdfunding phase paid more than 1 ether (ETH) per 100 The DAO tokens (DAO). The ETH amount in excess of 1 ETH per 100 DAOs was stored in The ...
- 40.4k
1
vote
1
answer
8k
views
I sent My ETC to my ETH address
I've sent a mistake ETC from ETH address from poloniex.
How do i do now.
This is my transaction (this is a fresh address)
http://gastracker.io/tx/...
- 13
0
votes
1
answer
2k
views
Trying to withdraw from contract - Fail with error 'WARNING: not enough ETH for profitable frontrunning. Need at least 1 ETH at present market ...' [duplicate]
Tried to use a standard front running bot but the thing is my eth is still on the contract so I don't think I've been scammed (yet) makes no sense since my eth is still sitting there.
this is the code
...
- 3
42
votes
3
answers
35k
views
Why is ether divisible to 18 decimal places?
1 ether is 10^18 wei, the smallest denomination. Why does ether have such a high degree of divisibility?
- 8,971
23
votes
2
answers
65k
views
Gas price in ETH unit
I am wondering if there's a website that provides the price of the standard gas limit (21000 Gas, transaction cost for sending ETH) in ETH unit.
I checked Ether.Fund site, but it provides the gas ...
- 401
19
votes
2
answers
3k
views
What prevents the market from assigning value to testnet ETH?
If enough people mine testnet ETH for testing purposes, difficulty will rise along with the cost of generating testnet coins. In some a circumstance why would the value of testnet coins not rise based ...
- 293
18
votes
5
answers
24k
views
Is there any Ether mixer / tumbler available?
Quick checking around there are exactly two references to an Ether Mixer - this non functioning and here (r/ethereum) 24 days ago.
Unless I am missing something how can I hide the source of an ETH ...
- 238
15
votes
2
answers
4k
views
Is it possible to send transactions to multiple recipients?
In other blockchain based platforms, it's possible to send transactions to multiple recipients. For instance, if I want to send 13 ETH to Alice and 7 ETH to Bob, Bitcoin has sendmany. Is it possible ...
- 33k
14
votes
4
answers
4k
views
Where can I buy Ether?
Where are the best places to buy ether with the least resistance and lowest fees? Is there something like local bitcoin, but for ether?
- 4,756
14
votes
6
answers
17k
views
How to create a temporary account for testnet with funds?
I'm a newbie in using the ethereum wallet.
After I completely installed and downloaded data for the testnet I create a new account but my new account has nothing (0.00 Eth).
It lead to I can't do ...
- 455
10
votes
4
answers
17k
views
API to gather list of top token holders
I working on a Ethereum project and I would like to gather a list of top X (20 for example) Ethereum accounts. This would behave similar to etherscan.io (https://etherscan.io/accounts)
Is there an ...
- 103
10
votes
2
answers
13k
views
Which Ethereum accounts have the most Ether?
Where can someone get a list of all the ethereum accounts and sort it by the # of ether they have?
- 4,810
9
votes
1
answer
2k
views
ICO crypto-currencies accepted during the sale: ETH, BTC, or even fiat?
ICO contracts are meant to accept Ether as payin for the tokens sold, for example https://cartaxi.io/pre-ico or https://www.herocoin.io/
But there are a lot of ICOs running on Ethereum that accept ...
9
votes
1
answer
4k
views
How are Ether balances stored on the Ethereum blockchain
My understanding of Bitcoin is that balances are not stored but are instead calculated by summing all in and out transactions.
Are Ether balances calculated in the same way or are they stored ...
- 579
8
votes
2
answers
14k
views
How to use static-nodes.json / trusted-nodes.json to prevent connection loss on private network?
I have 2 nodes running on private network under the same network id connecting through
sudo geth --identity "testpython manage.py runserver 0.0.0.0:8001" --networkid 1100 --mine --nodiscover --rpc -...
- 333
8
votes
3
answers
7k
views
What are digital tokens? How are various tokens generated on Ethereum?
I've heard in various talks, Ethereum can generate any token (besides ether), representing anything from bitcoin (through btc-relay), litecoin, dogecoin, digital assets, shares, ownership ...
- 4,756
8
votes
4
answers
8k
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 ...
- 564
7
votes
3
answers
26k
views
Sent ether from wallet to bittrex, 12 hours later no balance on bittrex [closed]
So I made an account on bittrex and I created a hex address so I could transfer over my ether, I went into my wallet and sent 0.1 ether to bittrex, 12 hours later my bittrex account still shows a 0 ...
- 111
7
votes
1
answer
14k
views
How do you send Ether as a function to a contract using Remix?
New to Solidity...
When deploying a contract on a private blockchain using Remix, I am unable to execute payable functions. When executing these functions, the following error message displays: gas ...
- 347
7
votes
1
answer
2k
views
How to import a account from testnet?
I recently traded BTC for 1 Ether using shapeshift.io
The transaction was successful, but there is no record of Ether in my local account.
Here is the tx reference.
I fear that I have made a ...
- 71
6
votes
0
answers
255
views
What is the expected Ether issuance schedule after transition to PoS? [duplicate]
Is there anywhere I can read the latest Ether issuance schedule plan? I understand what it is now (5 eth / block plus uncle rewards), but what will it be after proof of stake? I've read conflicting ...
- 131
6
votes
2
answers
10k
views
How to install eth on debian? (symbol lookup error)
I installed from the ubuntu ppa and got this error.
➜ ~ eth
eth: symbol lookup error: eth: undefined symbol: _ZN3dev3eth14EthashGPUMiner14s_numInstancesE
What can I do / check?
I'm on debian ...
- 4,640
5
votes
1
answer
6k
views
How can I verify ownership to allow resale of NFTs?
I have discovered NFTs and ETH recently and would like to build a marketplace like opensea but allows resale of NFTs that are already minted on various block chains(ETH, FLOW). Starting with just ETH, ...
5
votes
1
answer
851
views
Why Are Balances Not Displaying On An Imported Wallet in Mist? (It Does Appear on Etherscan) [duplicate]
I just got a new computer, installed Mist 0.8.8, synced the entire blockchain, then copy-pasted a UTC wallet file from my old computer into my new computer's %appdata%>keystore directory. The wallet ...
- 1,245
5
votes
2
answers
1k
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 ...
- 67
5
votes
4
answers
6k
views
Problem In Getting Rinkeby Test Ethers
I tried to get rinkeby ethers from https://faucet.rinkeby.io/ by creating a tweet but the website shows "insufficient funds for gas * price + value” error. I also tried the website faucets....
- 51
5
votes
1
answer
13k
views
The ERC-20 Token Transfer might have Failed (ErrCode: unable to locate corresponding Transfer event log), check with sender
EtherScan.io is showing error: The ERC-20 Token Transfer might have Failed (ErrCode: unable to locate corresponding Transfer event log), check with sender.
Transactions are successful but users are ...
- 51
4
votes
2
answers
3k
views
How can a smart contract run when receiving ether directly, not through a function?
I have a smart contract with a payable bet() function. When someone sends 1 ether to the bet function, the contract is executed.
I'd like the contract to run the same code when someone sends ether to ...
- 311
4
votes
1
answer
3k
views
Ethereum wallet address creation limit and ether storage limit/capacity per address
I am new to Ethereum.
I would like to know
How many addresses can you create in an Ethereum wallet (limit)?
Meaning is it 1K, 10K or 100K addressees you can create in a Ethereum wallet
What is the ...
- 143
4
votes
2
answers
828
views
What are the risks of using tokens that appear to have ERC20 standard?
Say someone sends some ERC20 (supposedly) tokens to my ETH address. I then use transfer() function to send these tokens to some other address. The question is - by using a "transfer" function do I ...
- 43
4
votes
3
answers
5k
views
accepting ether in a smart contract
I want to create a simple smart contract for registration of users to a competition where when users can pay to contract and 2 ethers will deduct from his account.
But when I'm trying to do so on my ...
- 71
3
votes
2
answers
17k
views
How do I sell ETH received as mining rewards?
This seems like a simple question but how would one go about selling one's mined Ether?
I originally thought that I could just send my Ether on my local machine to a Coinbase Ethereum wallet and ...
- 165
3
votes
3
answers
14k
views
Reinstalled MetaMask, account lost?
I had 3 accounts under my MetaMask Chrome extension. One of them had some small deposit. I have reinstalled the extension and used seed phrase to get access again. However, I can see only one account (...
- 135
3
votes
2
answers
2k
views
Is ether (ETH) stock in a particular company?
If I purchase an Ether for $257, have I purchased stock in a company or just some type of currency? I am all new to this and have no background in stocks or markets so dumb it down for me, please.
3
votes
3
answers
487
views
Will homestead increase Ether's issuance rate?
This question is really simple, I was wondering if when homestead arrives Ether's issuance rate will increase as it was originally planed, because quoting Ethereum's blog post "Ethereum Launch Process"...
- 1,378
3
votes
1
answer
371
views
cpp-ethereum build error
I have cloned the cpp-ethereum in Linux (centOS) from git as follows as suggested in cpp-ethereum-develop cmake error
git clone https://github.com/ethereum/cpp-ethereum
cd cpp-ethereum
git ...
- 81
2
votes
3
answers
3k
views
Recover ETH in a smart contract
I watched YouTube tutorial and deployed smart contract using solidity and remix. https://www.youtube.com/watch?v=LDM9WphwRWc
https://rentry.co/erfex/raw
But while I deploying the contract in Binance ...
- 21
2
votes
1
answer
351
views
I mistyped an address... Funds lost ?
So I recently mistyped an ether payment address 0x6bEE6FCB3213146Aa38928B91eebEC6527B716E2
as 0x6cEE6FCB3213146Aa38928B91eebEC6527B716E2
so I by mistake typed c instead of b. My eyesight is bad and ...
- 39
2
votes
1
answer
160
views
Is having 1 smart contract for an ICO good practice?
I wrote a smart contract which will be used in an ICO. The contract is an erc20 token but it also provides functionality to mint tokens so basically users can call the payable function. This in turn ...
- 131
2
votes
1
answer
7k
views
How to sell ETH for USD or EUR?
What is the process to get Dollar or Euro from Ether to my bank account?
The easiest is to sell ETH into BTC on Poloniex, then I transfer my BTC to Kraken and on Kraken I sell BTC into Euro and the ...
- 1,898
2
votes
1
answer
1k
views
What happens if i deploy a contract to an address that already has eth?
I know it is possible to calculate the contract address in solidity by using the create2 opcode.
Let's say I transfer 1 ether to a random address.
Then I deploy a contract with a payable transfer ...
- 183
2
votes
2
answers
476
views
Why immutable contracts [closed]
I'm a seasoned engineer, but quite new to blockchain technologies.
I'm trying to grasp the "why" and the real "value" of immutable contracts.
Never seen or heard of pieces of software being ...
- 167
2
votes
1
answer
5k
views
Recovering private key from keystore file
Recently I came across my old keystore file from the original Ethereum Wallet that I used back in 2017. Unfortunately I cannot find the private key or password for that wallet anymore, big problem of ...
- 21
1
vote
1
answer
3k
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.
- 113
1
vote
2
answers
7k
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 ...
- 21
1
vote
1
answer
334
views
cpp-ethereum-develop cmake error [duplicate]
I have downloaded "cpp-ethereum-develop" zip file from github and unzipped it.
While executing "cmake eth"
It gives the following error.
Unknown CMake command "eth_simple_add_executable".
CMake ...
- 81
1
vote
1
answer
913
views
Ethereum sent to mistyped address
I sent etherium to a one letter wrong address I typed 6 instead of a b amongst those letters from my mining account. I would like to know what can I do to recover those etheriums?
- 19
1
vote
1
answer
2k
views
Add value to ERC20 token
I have created an ERC20 token, but how does it get value?
Right now, 100,000,000 BST tokens are worth 0 Ether.
Can someone help me learn how to get the tokens to gain value?
- 11