Questions tagged [block-interval]
Questions concerned with the expected or actual time between the discovery of two blocks.
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Are block.timestamp and block.number still problematic under Proof of Stake?
As stated in the SWC116 (https://swcregistry.io/docs/SWC-116/) using block.timestamp and block.number in Smart Contracts under Proof of Work was problematic.
Block.timestamp could be influenced by ...
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Why are Ethereum slots 12 seconds?
In Ethereum Proof of Stake, how was this particular slot time of 12 seconds decided upon?
Credit: https://old.reddit.com/r/ethereum/comments/gb8j89/eth20_slot_time_a_question/
eth♦
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Blockhash and Block Timestamp manipulation in PoS
I was looking at generating some psuedo-random numbers in an Etheresum smart contract and understand that it is possible for miners to manipulate the blockhash and block.timestamp. The Solidity ...
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Execute an ethereum transaction every X amount of blocks within a smart contract?
I would like to build a smart contract where users deposit crypto into a lottery like system. Every 10 blocks that have passed on the underlying chain I want to generate a random number and send out a ...
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Creating a smart contract with ipfs
I created a site with the help of ipfs, my goal is to create a smart contract with the ipfs CID of this site. but i have no idea about this, can anyone help?
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High block mining time even with low difficulty
We have a private network running on Hyperledger Besu. We are using ethash, and it had a fixed difficulty of 3625. That was producing blocks fairly quickly, averaging about 8-10 seconds, with some as ...
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Oscillating blocktime issue
I have three private blockchain networks:
production
development
QA
production and QA both have blockTime of 10 seconds and are behaving as expected.
When I read their block timestamps, there is ...
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Why PoS block not strictly generated on 12 seconds
I'm trying to estimate the block arrival time in etherum PoS.
I was given to understand that every 12 seconds, a new block will be generated. I did a simple calculation but the result is not expected.
...
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Miner-modifiability of block timestamp after the Merge
Under proof of work, the Ethereum block interval varied, but miners could modify the block timestamp by +/-15 seconds, as long as the modified value was greater than the parent timestamp, without the ...
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How stable is the block time after Ethereum PoS? [duplicate]
I understand that PoW basically depends on luck. If the target block time is 10 minutes, if lucky, 3 minutes, if unlucky, will not be able to find the hash even after 30 minutes.
How stable is the ...
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What explains the relative infrequency of block time differences coinciding with EIP-100 thresholds?
When I plot a histogram of timestamp differences between consecutive blocks, I see some irregularities around the EIP-100 thresholds. Because the adjustment factor includes integer division by 9, ...
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Would it be possible to change the 15 seconds block time to 1 min?
Do you know if it is possible for ethereum forks to increase the 15s block time to for instance 1 min block time or 2 minutes block time?
Moreover I noticied that when we start new blockchain the ...
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How to increase block time in a fork of Ethereum?
I have questions about blocktime, please answer the ones you can. Help very appreciated!
Do you know if it is possible for ethereum forks to increase the 15s block time to for instance 1 min block ...
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What is the relationship between block time and the time I send a transaction?
As I understand, the average block time is 16 seconds, and it ranges from 10-30 seconds.
Does that imply that each individual transaction on the current block was sent no longer than 30 seconds ago? (...
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Latency between block production and data reception
I am trying to measure the latency between the block production (eg block.timestamp) and the data reception (eg Date.now());
I tried with different nodes (Infura, Amazon Managed Blockchain and my very ...
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Update rewards per second
I'm currently working on a staking contract and would like to get EVERY SECOND the updated number of rewards the user gets for staking tokens.
Are there any technical limitations to get the updated ...
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What if running a function longs more than block time?
In a blockchain with a typically small block time such as Polygon (or any other chain in general), what happens if executing of a
a) transaction
b) view function
longs more time than a block time?
...
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By what duration can a miner manipulate block.timestamp?
By what duration can a miner manipulate block.timestamp? Can they manipulate it by 10min, 5sec, 2hrs...?
From here I can see that the average block time on the ethereum blockchain is 13 seconds.
This ...
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How to get block -> timestamp in bulk, incl. possible 3rd party api
I'm looking to get my hands on a historical block -> timestamp mapping.
Although it's possible to get this data using web3.eth.getBlock it's rather costly to do it for all individual blocks.
Since ...
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Ropsten light node block number ~1000 greater than it should be
I'm running geth on Ropsten, using
geth --ropsten --syncmode "light" --http.addr localhost --http.port 8545 --rpc
My most recent block number is 10266786 (and increasing), whereas etherscan....
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What does this block of code do?
Can anyone explain or point me to a specific source where I can learn about .providers functions. In particular I am trying to understand what this block of code does:
for (let i = 0; i < 257; i++) ...
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Auction period using block.number
I have something like:
contract example{
uint endBlock;
constructor(uint _elitism) public {
endBlock= block.number + 40; // 10 min of time
}
...
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2
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Can you use block times as a measure of duration?
I have read that it takes about 12 seconds for an ethereum block to be mined. Let’s us say I have a contract mined on block 100, can I set a function that can only be run at block 200 or more? Thus ...
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What is the theoretical average latency of data transmission?
I concluded a pretty simple test to measure some latencies. I connected to two providers (Infura and Quiknode) with Web3.js and subscribed to new block headers. Then I compared the time of arrival and ...
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Ethereum block timestamp
Is the timestamp of a block referring to the time that block is created or when it's mined by a miner?
Suppose I subscribe to new incoming blocks using the following NodeJS code (with web3):
web3.eth....
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how estimate average time for transactions to smart contract
I have created a decentralized application on the Ethereum Blockchain network. This application receives data from different addresses on the blockchain network and saves this data in the blockchain ...
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Testing response times using Ganache
If you want to simulate repsonse time of your smart contract, how realisitc is it to use ganache? I'm thinking that in a live network, ropsten for example, there would be a lot more transactions ...
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How to adjust "time slots" in Ethereum 2.0 (Sharding + PoS)?
In Ethereum 2.0 (Sharding and PoS), blocks are produced at a regular schedule, say once every t seconds.
What does this time slot depend on? The number of validators in the network who deposited ...
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How to reduce block time for existing ethreum blockchain network?
I had deployed my private blockchain network back in 2018-08-12 16:12:48 +0600 (1 year, 167 days ago). Since then it is working. At that time the block time was 20-30 seconds which was acceptable for ...
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How to calculate average time it takes for a transaction to be added to Ethereum blockchain?
In the following article (LINK) we read:
"despite the fact that at the time of this writing a new block is
produced approximately every 10–20 seconds the average time it
actually takes for a ...
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Rinkeby not producing blocks
transactions are not getting mined on rinkeby testnet and last block time is almost 2 hours ago. How did such things happen in a decentralised network?
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Are the timestamps of blocks for Ethereum only accepted when they are monotonically increasing?
Are the timestamps of blocks for Ethereum only accepted when they are monotonically increasing? If yes, why? And why other blockchains like Bitcoin and other blockchains with shorter block time can ...
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How can I use bitcoin block stamp as seed for random number generation?
I am trying to create an ethereum based smart contract that shall generate random number. After searching around, I get to know that ethereum block stamp is vulnerable to miners hacks and false ...
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Decentralized Time server to get time in Dapps? [closed]
So basically i want to ask that how can we programmatically get the accurate, exact and current time in a DApp, without relying on the system's time or a centralized time server ?
Is there a ...
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Avoid using "now"
I am using "now" to save the block timestamp details. But there is a warning to avoid its usage. If we need to avoid it what is the best alternative to it.
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What happens to immutable contracts when Ethereum 2.0 will likely change the 15s block time?
Immutable contracts that need to have a time system for handling their functions process are mostly based on block.number system. They assume there is about 15seconds between each block and thus ...
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How can I wait if it's not possible in smart contracts? [duplicate]
From my understanding, waiting in a solidity smart contract would create a total disaster for the whole Ethereum's blockchain.
I can see in some circumstances that solidity offers block.timestamp ...
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Is there any library to estimate timestamp of future block?
I am in need of a library that estimates a date or some sort of timestamp when fed with a future block number (on mainnet or any major testnet).
For instance, https://etherscan.io/block/countdown/...
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Increase block number on Ganache
How can we increase block.number on Ganache for testing purpose ?
If not possible do you know an alternative like passing X fake transactions to artificially increase block.number.
Or if we have to ...
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Known cases of miners withholding blocks when used as randomness?
There are some applications that use the blockhash as a source of randomness, often with a payout similar to a lottery. I've heard of attacks where it would be more profitable for a miner to withhold ...
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How is the block interval constrained in Ethereum 2.0
Sorry if i get any of the terminology wrong here, i'm no expert when it comes to PoS protocols.
How does Ethereum 2.0 control for blocktime, typically we have the idea of a function that can be ...
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Can we freeze amount of token, amount of time with smart contract code?
Is there a smart contract code to freeze amount of token amount of time. For example i have 20 ether, with a smart contract code can i freeze it 1 year, even i can not touch it? With that code our ...
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How to test time-dependent contracts on the mainnet?
In Ganache, I use evm_mine to simulate the passage of time.
Assuming block times are accurate enough, what are the best practices to test some contracts on the mainnet or a testnet which depend on ...
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Are there any EIP to speed up block times to stay competitive with other blockchains like EOS with .5 second block times?
Doing some research on EOS and it "seems" impressive or its just hyped up marketing.
They have .5 second block times which I can see to be very beneficial for dapp development response times. Are ...
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Sharding: Shards with different properties?
I am currently trying to get more into sharding but there's one question I haven't found any answer to yet.
Could sharding introduce shards with different properties? For example could Shard A have ...
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3
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How to allow an account to withdraw from another one?
The goal is to create a contract which allows party B to withdraw from party A's account according to some formula. I don't want to use an escrow model, rather just to:
Let A attest that they are ...
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How to get the block number which is the closest to a given timestamp?
Is there any method(ology) in web3 which allows to get the block number at a given date?
In particular, I have two dates as an input and I want to effectively get all events between those two dates. ...
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What happened to the average blocktime during this period?
What happened to Ethereums blocktime from April to October last year (2017)?
In the whitepaper, Vitalik said the difficulty should adjust at a maximum rate of 0.1% per block (around 100% per 12 ...
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Ethereum's block times are under 10 seconds compared to most other coins which are in minutes. Why and How?
Ethereum's blocktimes is under 10 seconds but other coins like BTC, LTC, and others are usually in minutes. How does ethereum solve the problems to why those other blocktimes are in minutes? Basically ...
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How can i increase the block number in testrpc?
I have the contract which has the dependencies on the block.number so in my javascript test cases I want block number jump. I know about the eth_mine but it will mine only the current block or work ...
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