Linked Questions

2
votes
2answers
18k views

How much is 1 gas in ether? [duplicate]

On Etherscan the daily GasUsed chart shows current usage of 10-15 bill. How do I convert this correctly to ether (ETH)?.
0
votes
1answer
193 views

How does gas in Ethereum works? [duplicate]

Let say I have a code that print "Hello World". I deploy it to the blockchain and pay 1000 gas for it. Will my code keep running for every subsequent block till it runs out of gas? Or will it only run ...
1
vote
0answers
62 views

What's the point in the 'gas' parameter passed to function 'signTransaction'? [duplicate]

I am using web3.js v1 in order to sign and send transactions: async function signAndSend(transaction) { let options = { to : transaction._parent._address, data: transaction....
1
vote
1answer
34 views

If gas is refunded, is it required to call? [duplicate]

Suppose a smart contract external function uses very much gas, but refunds (with .transfer()) the used gas to the caller. Question: Can it be called with a small amount of gas despite it uses much? ...
0
votes
0answers
19 views

Pending Transaction. How long may it take? [duplicate]

I have a question about this specific transaction: 0xd0dfbefc699ba79c2ddd86b0f7176e3e6491534db0a57597ec7aab9ce3e71726 the transaction is pending for some days now. I offered 5 gwei as fee. Max Amount ...
153
votes
2answers
35k views

What is the difference between a transaction and a call?

What is the difference between a transaction and a call? In some interfaces, I can interact with contracts via calls or via transactions. What is the difference between the two, and can contracts also ...
98
votes
2answers
65k views

Which cryptographic hash function does Ethereum use?

Many sources refer to the use of the "SHA3" cryptographic hash function within Ethereum, but the Ethereum project began before the SHA3 standard was finalised, and there was some confusion/controversy ...
11
votes
3answers
36k views

How to calculate transaction fee?

For calculating the transaction fee using web3js I am using it's gas price: eth.getTransaction("txhash").gasPrice multiplied by how much gas was actually used: eth.getTransactionReceipt("txhash")....
22
votes
2answers
19k views

How do I know how much gas to use when calling a contract?

When I am calling (sending a transaction to) a contract how do I determine how much gas to use? Is there a way to calculate this upfront & what happens if I send too much / too few gas?
14
votes
3answers
11k views

Is it possible to build a private (permissioned) blockchain with Ethereum?

Ethereum is a great blockchain, but for some services the transaction fee is prohibitively too expensive. Is there any project and/or guideline on making Ethereum so it works on permissioned ...
7
votes
2answers
2k views

Who gets the fee from contract call?

Basically you don't need to pay fee for contract call, but if a contract method does lots of work, you need to add gas in contract call to prevent DoS attack like this: contract.method.call({gas: ...
3
votes
3answers
4k views

What is the point of variable transaction fees in Ethereum (and Bitcoin as well)?

After reading through the docs and through this post, I understand the concept and need for gas, but I do not understand why each transaction can have a variable fee associated with it. It seems to be ...
13
votes
2answers
772 views

Why does Ethereum have gas?

Why does Ethereum have gas? What other approaches could Ethereum have used to work around the Halting Problem?
2
votes
2answers
3k views

If the price of ether coin goes up, does it mean less likely people are going to build application on the ethereum network?

If I am not mistaking, application developers need to pay using ether coins to have their application hosted on the ethereum network. So if the price of ether keeps going up like it is now, doesn't it ...
4
votes
1answer
5k views

How to Set Gas Price in Private Blockchain?

I admit that I don't understand Gas at all. But I think it is basically the currency which dapps use to interact with each other and the blockchain. Yes? If you're creating a custom/private network,...

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