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
738 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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2answers
48 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 (...
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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
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
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 ...
5
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1answer
754 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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1answer
21 views

How can i store a Aces High Pin on the Ethereum blockchain? [closed]

I have a few Aces High Pin's laying around and wanted to know how i can store them on the Eth blockchain.
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1answer
478 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 ...
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0answers
18 views

Do Ethereum tokens have symbol name?

I am not familiar with Ethereum contract development. I wonder if Ethereum tokens ( like ERC20, ERC1155 or ERC721) have symbol name or not. On EOSIO the asset is a structure composed of amount and ...
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2answers
451 views

Is it legal to trade between markets when there are market inefficiencies?

Are there regulations or rules that prevent me from writing a program that profits from arbitrage? For example: Coinbase may be selling ETH for $99 and Kraken $90 which provides an outstanding ...
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2answers
2k views

Smart contract based betting — protection against depreciation

Let’s say I want to enter into a bet with my friend — if it rains 10 days from now, I will pay him $100; if it doesn’t, he will pay me $100. Would it be possible to take advantage of smart contract ...
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0answers
45 views

How to know weather ETH or some token like USDT is transfered in smart contract transaction

From last two weeks I am stuck on, I want to know in smart contract transaction either ETH is transfered or some token like USDT below is the JSON of transaction hash. I am working with DotNet core ...
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1answer
772 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 ); ...
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1answer
126 views

How do Ethereum smart contracts work with external outcomes?

Since every node has to execute a smart contract and receive the same result, Ethereum smart contracts can't go out to the Internet to verify data. So, how do these sites that bet on the outcomes of ...
2
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2answers
480 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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1answer
423 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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3answers
29 views

Emitting Transfer Event even when there is no actual transfer

I am new to smart contracts and trying to understand it so that i can detect Ether transfers done to my user via Smart Contract. I know I can find the event emitted from topics[]. But for those ...
74
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6answers
272k views

How do I buy Ethereum with USD?

I am a complete noob at investing. I have never bought stock or invested in anything before but I have $300 I would like to turn into Ethereum. Could someone please tell me step by step how to ...
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1answer
248 views

Transaction dropped. How to increase gas fee?

I sent some ether using Ledger Live, but the gas fee was too low. Id like to increase the gas fee. I was told I can do this via Ledger Etherum Wallet for Chrome. However, when I open Ledger Etherum ...
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1answer
33 views

can you send ethereum to the same address you sent from?

I was doing some financial investigation and I found transactions which had same account for source and target. Is this possible?
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2answers
338 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 ...
0
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1answer
103 views

problem calling balanceOf from another contract

I try to learn solidity and i have a problem. I've created a base token and i want to call the balanceof method from this token in another contract. In Solidity Remix i get : call to BaseTokenBet....
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2answers
500 views

How to transfer Ether to ERC20 token contract?

I have a function that needs to make transfers to a token smart contract as well as personal accounts upon satisfaction of some conditions. function completeSale() onlyOwner public { if (...
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1answer
48 views

how can I pair my ERC20 token with Ethereum

I am building an exchange and i just want to know how this pairing thing works. How can I pair my ERC20 token with other crypto assets like Ether and BTC?
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1answer
1k views

Computer lagging & low MH/s & stop mining

Hi I am very new to mining and tried using Claymore DualMiner to mine ETH on the Nanopool. I've set everything up, synced the blockchain and generated the config file from https://nanopool.org/ and ...
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1answer
58 views

How to view or transfer initial ethereum smart contract balance?

I created a new smart contract token with initial supply and deployed it via MetaMask. Then I added this token into MetaMask but token balance is Zero. Now, My question is when we create a new ...
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1answer
117 views

how to find if a Tx hash is in pending state in ethereum mainnet after web3j fastTxMgr timeout

I am using QueuingTransactionReceiptProcessor() with callback accept(). DEFAULT_POLLING_ATTEMPTS_PER_TX_HASH is 10 and POLLING_FREQUENCY is 15000. That gives nearly 3 min wait for network to ...
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1answer
24 views

Best ways to get only “active” in arrays - get group members

let's say I have an group contract where users can join and leave groups. When a user joins a group, his address will be added to members[groupId]. When he lefts, the members[groupId] will be set to ...
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1answer
45 views

How to check when erc20 token was received in certain address

i am hosting a node and fully sync it. how i can call its api endpoints to figure out when DGX is received in certain wallet addresses.
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1answer
104 views

Decoding Hex value in solidity

I am trying to view values stored on my ethereum contract using ethereum wallet. Currently the values are being placed onto the contract in hex format. Is there a way to decode them on the contract so ...
0
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1answer
242 views

Ethereum mist wallet not synchronising, not showing Ethereum and folder

I am a beginner at setting this up and I used a youtube tutorial to download Mist. The problem is it's not syncing the blockchains. I've tried to debug this by going to users/appdata and inside the ...
0
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1answer
43 views

Why my tokens aren't visible to the address sent in etherscan?

I've flattened the code and fixed the warning. But the problem with the contract is that the tokens are not visible in the addresses when searched with etherscan but when I try to add through Metamask,...
3
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1answer
55 views

Ethereum Private network for Production use case

When I should consider to use Ethereum Private network for Production use case? Can I dictate network difficulty rules and apply permission on such network. Regards Dev
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1answer
54 views

Transfer WETH from myetherwallet to metamask wallet

I converted some of my ETH to WETH already, on my hardware wallet. H/w wallet was conected to myetherwallet, and I can see my WETH there under tokens panel. I also created a metamask wallet and I am ...
0
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1answer
23 views

call contract function without a fullnode?

I have a contract that I deployed a while ago. My mist is like 6 months behind and I don't even think I have enough HD space for it to catch up. I can still launch it anyway to get contracts and ...
3
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1answer
506 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 ...
0
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2answers
41 views

Can you store anything other than Eth in one wallet

Total newbie to blockchain. I want to use ethereum to store information and not so much currency. For example, I want to create a game where I can store someones point. Can the wallet address store ...
2
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3answers
154 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 ...
0
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1answer
24 views

CLI wallet where I can pass in a Private Key and send out ETH and then delete this key?

Is there a CLI command where I can pass in an ethereum private key and send some coins to another address? I'm trying to build out a reoccurring payment system where a user can send 1 eth to another ...
0
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1answer
33 views

I am using already deployed tokens in my contract

My question is if I'm not implementing ERC-20 methods in my contract, but I'm using already deployed ERC-20 contract methods in my contract, so can we say this will be ERC-20 compliant contract? ...
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1answer
14 views

Trying to get a wallet at Myetherwallet

I went on the site, got my Keystore file number and my Private Key number but I cant figure how to get my address? Tryed for hrs.
2
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1answer
67 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 ...
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1answer
43 views

Why does Ropsten faucet show “Your account is grey listed for 0 hours and 0 minutes”?

I am requesting test ether from a Ropsten faucet, but it is showing an error. Please help me to resolve this error.
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3answers
426 views

HI, can i get live Ether to USD price in my smart Contract ? I want to keep a hardcap in USD. is it possible to do so?

I want to make a function for my ICO to calculate ethers collected so far and convert them into USDollars. I wanted to hard cap my ICO in USDollars. Is it possible to do so ? I am using Solidity to ...
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3answers
70 views

Auction contract question - Ether lock

I have an auction contract, where bidders bid with Ether then me (owner) select which offer is most suitable and thus this bidder is contract winner. Once the winner is selected, I send him data as a ...
0
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1answer
49 views

Passing ether through smart contract logic to address

I'm wanting to pass Ether through some smart contract logic then to some address set in the contract. Is this the possible, or the best way? Or should the ether be passed to contract and the receiver ...
1
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1answer
35 views

Multiple Array[] along with mapping handling

This code is running but when the same user make a bid then the bid is being replaced from the first bid and event is printing twice the same record. i want that one address make a bid and for his ...
0
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3answers
63 views

Transfer ETH using third party

I want to transfer ETH from an individual address to another address. So is there any API provider who can send ETH from single Address to another address. Also If I setup Web3 in windows machine ...
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1answer
13 views

Needs some helps in graphic cars

what's the super graphic card is a very suitable for the mining etheium and what is the exact CPU that suits it wuth RAM.
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0answers
19 views

Hourly data for Ethereum?

Is there any reliable source for hourly data for Ethereum dating back to 2017? The poloniex API only provides me with daily data - https://poloniex.com/public?command=returnChartData&currencyPair=...