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
66 views

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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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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2answers
1k 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
38 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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0answers
35 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
460 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
147 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
146 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 ...
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6answers
273k 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
93 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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1answer
60 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
83 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
86 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,...
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1answer
322 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 ...
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1answer
43 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 ...
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1answer
40 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
17 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.
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1answer
326 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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1answer
15 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
29 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=...
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4answers
3k views
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2answers
165 views

What is the max ethereum allowed in a private network for the whole network?

When I build a private chain setup, what is the maximum Geth ethereum I can have for the life of the network. Another way of asking the question would be: What is the maximum ethereum one account can ...
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2answers
83 views

Internal contract-to-contract call

I am confused with the following sentence in the Solidity documentation: During the execution of the fallback function, the contract can only rely on the “gas stipend” it is passed (2300 gas) being ...
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9answers
19k views

How to get testnet ether?

https://youtu.be/NBwRXpCQta8 I watched this video and followed it. But my account test ether is zero. I used faucet.ma.cx:3000 site too. But test ether is zero.
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2answers
454 views

Transfer ether from one account to another using smart contract

I`m trying to transfer ether from account A to a smart contract and from the smart contract to account B. I wrote some code that approximately works on Remix IDE, but I completely got lost with the ...
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1answer
359 views

How to build ERC20 based stablecoin?

I want to build stablecoin for my college project. I am thinking of developing ERC20 token pegged with fiat currency. Can someone please suggest me best tutorials/guides to build stablecoin on ERC20?
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1answer
73 views

Ethereum Boardcast shows error: non-canonical integer (leading zero bytes) for *big.Int, decoding into (types.Transaction)(types.txdata).S"

I meet with a problem, does someone can help me how to deal with leading zero in raw-transaction? My raw transaction is: ...
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1answer
1k views

I need to know how to send ether from one address to another address for my Dapp

I have coded the below code it executes well but the ether cannot be send only the gas fees are sent? pragma solidity ^0.5.2; contract sendEther{ address payable rec= address(...
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1answer
148 views

Problems calling function with web3 from python

I was trying to call a function from my python server to a contract deployed in Ropsten. This is my method in the contract: function send(address receiver, uint amount) public { require(msg....
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1answer
72 views

Error sending ether to a a smart contract deployed in ropsten with web3 with python

I am trying to send ether to a smart contract deployed on ropsten via infura, but I am having some problems in txn. The error is "Error in Txn: Reverted". The sender account has enought ...
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0answers
213 views

Solidity calldata for an array of structs

I'm trying to create the calldata offchain for an on-chain low-level call to a method that accepts an array of structs as an argument. I'm not sure how to encode the calldata for this. Here's a ...
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1answer
62 views

I want to create a account on blockchain using web3swift in IOS app, but I am new on blockchain don't know how to do. Please can anyone help me out?

I want to create an account on the blockchain using web3swift in the IOS app, but I am new on blockchain don't know how to do it. Please, can anyone help me out?
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1answer
132 views

giving users ETH addresses to deposit to

So I want to allow users to deposit ETH to their accounts in my website. How could i go about giving a user an ETH address to deposit to that address and then detect it and add the funds to user's ...
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2answers
261 views

How to send ETH to address(0) from msg.sender address using multiple token's contracts, with Solidity 5.x?

I need the safest way for an user to send any amount of Ethereum to address(0). The amount is calculated by the contract, and there is no limit (assuming there is enough funds). All the code I could ...
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1answer
616 views

How to connect Trust Wallet in Javascript?

I want to use TrustWallet for payments in my project for mobile users. I saw the documents related to TrustWallet web3 API but not getting how to use it in javascript. Can anybody help me with the ...
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1answer
414 views

How to use the zksnarks capability of Ethereum?

Simple question but I couldn’t find the answer anywhere… How to use the zksnarks capability of Ethereum in order to perform fully Anonymous sending of Eter from one wallet to an other one ?
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1answer
63 views

Can i recover ethereum sent to and invalid address? [duplicate]

i've mistakenly pasted "2.5" in address field submitted a withdrawal request. can i get my coins back since the address is an invalid or the coin will be sent? I'm afraid i may loose my coins.
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0answers
45 views

Web3 - cannot deploy contract to private chain has been reverted [duplicate]

I want to deploy a contract to my private chain by using web3.js, but my contract deployment has been reverted by the EVM. This is error message index.js:1437 Error: Transaction has been reverted ...
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2answers
224 views

Exchange ERC20 token with other ERC20 token

I have 2 ERC20 tokens. The contract are designed as standard ERC20. Here are the 2 tokens to take as an example - AUDC --> Contract Address: (0xContractAUDC) Wallet Address: (...
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1answer
32 views

Can a single token built on Ethereum’s blockchain be more valuable than Ethereum itself?

As in the question, from an economics point of view, is it possible to ever have a single token (REP/BAT or something completely unforeseen currently) takeover the underlying's platform market cap or ...
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0answers
24 views

PGP Key in Funding Application [closed]

I am looking to get funding from the ECF Network for an Ethereum project. They ask for a PGP key under the apply form ("Please make sure you paste your pgp public key here: ", but nowhere on their ...
0
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1answer
130 views

How to solve the error “”before all“ hook: prepare suite:” [closed]

When I tested my contract, I got this error ""before all" hook: prepare suite:" Does anyone know how to solve this error? This is my dependencies. "truffle": "5.0.7", "web3": "1.0.0-beta.46"
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0answers
33 views

Inconsistent responses with 'eth_getTransactionByHash' through RPC API. Can anyone help?

I have been using the requests library with python to query the geth/rpc api in order to get ETH transaction data. I connected to geth via "geth --rpc --unlock TESTINGADDRESSWITHNOVALUE --allow-...
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2answers
652 views

Ethereum Qr-code with amount?

How should a qr-code be formated with an amount in it? The npm package ethereum-qr-code uses the following format according to EIP-67: ethereum:0x7cB57B5A97eAbe94205C07890BE4c1aD31E486A8?gas=42000&...
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2answers
967 views

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 ...
2
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1answer
741 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
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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6answers
162k 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 ...
3
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1answer
529 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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