Questions tagged [time]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
1 vote
1 answer
24 views

How can I check if the day is Valentine’s Day every year?

Happy Valentine’s Day fellow nerds! This year for Valentine’s Day I want to mint my gf a valentine NFT. Since I’m building it I want to turn it into an NFT project that is free to mint for the public ...
Technically Web3's user avatar
0 votes
1 answer
21 views

How to advance blocks in a Hardhat test that uses block.timestamp?

I have this code for a Voting smart contract test: it("Should return true if end time is less than the current timestamp", async function () { const { votingSmartContract } = await ...
Falcon Stakepool's user avatar
1 vote
1 answer
805 views

How to set the timeout for provider http RPC requests in the ethers

I am using JsonRpcProvider in ethers V6. I am sending requests to node like getBlocknumber, getBalance ,sendTransaction etc through JsonRpcProvider. I want to set the response timeout for the requests ...
imelon2's user avatar
  • 508
0 votes
1 answer
25 views

Is blockchain a hard or soft real-time system?

The question is not strictly related to Ethereum. I was wondering if blockchain is considered a hard or soft real-time system? Hard real-time systems are those that have to meet hard deadlines ...
Taimoor Zaeem's user avatar
4 votes
2 answers
2k views

How to work with block timestamps in ethers and hardhat?

I have a time-dependent contract that has two require statements function launch(uint256 _goal, uint32 _startAt, uint32 _endAt) external { require(_startAt >= block.timestamp, "...
Kate Johnson's user avatar
0 votes
2 answers
68 views

Don't understand why this overflows revert

I have a timelock on an ERC20 contract, from year 0 to 9, it works until year 4, but from year 5 onwards it reverts. It fails both on minting and checking (Using 52 seconds intead of weeks for testing)...
Angel Guastaferro's user avatar
0 votes
0 answers
16 views

timeintervals in Solidity [duplicate]

Is there a way to do something at each time interval in solidity without having to write and sign a transaction (paying gas) each time the interval passed. For example. Say I have a glass of eWater on ...
AvocadoChocolate's user avatar
2 votes
2 answers
138 views

How to simulate time on testnet?

I deployed contracts to kovan testnet, but I have certain places where there is a 1 week duration. How do I speed up time on testnet so I can easily test these things? (For example speeding it up to ...
user101153's user avatar
0 votes
3 answers
291 views

How to setup a timer for a NFT? [duplicate]

I want to create a nft ERC721 that after 30 days it will be autoburned. How I can achive this?
Miguel Mont's user avatar
0 votes
1 answer
156 views

Time-based token distribution in smart contract

Say I have a smart contract for exchanging 6 Token_A with 6 Token_B with an additional time condition when only 1 exchange can happen every 1 month (we don't care about msg.sender here. we can assume ...
Yar's user avatar
  • 125
2 votes
2 answers
395 views

how to deploy the smart contract in brownie

Error: Final argument must be a dict of transaction parameters that includes a `from` field specifying the address to deploy from Terminating local RPC client... smart contract: pragma solidity ^0.5....
Abed ja'fari's user avatar
0 votes
1 answer
79 views

How can I advance time when testing on Rinkeby network?

I've successfully deployed my contract to Rinkeby. Testing on Remix everything worked fine. I'm now writing some tests in Javascript but I don't know how to advance time to test functions in a ...
Jochen Ruland's user avatar
2 votes
1 answer
718 views

Is it better practice to use smaller uint sizes when applicable?

My understanding of uint sizes is that smaller sizes will decrease gas costs. In my current dapp I'm building, I am dealing with time, for which it seems that uint32 will be plenty for my purposes (...
quantummidget's user avatar
0 votes
1 answer
146 views

Use scheduler in smart contract solidity

I am looking for a way to automate the execution of a function. Here is a very simple example of a function that will change the state of a boolean variable. pragma solidity ^0.8.2; contract Test{ ...
Wartywars's user avatar
0 votes
0 answers
123 views

Managing time increments in Solidity

Say I want to do a simple operation where a value x is automatically doubled after 1 hour. I want the contract to automatically check that it is time to double the value without needing to explicitly ...
Nassim's user avatar
  • 1
0 votes
0 answers
146 views

Get hour of day in Solidity?

What is the most simple way to get hour of the day in Solidity? Will this work? for example creating a condition that works only when it's past 17:00 during that day? if(hour > 17) { //yay this is ...
smenir443's user avatar
  • 125
1 vote
1 answer
3k views

Is it possible to create a time based nft where there is a fixed expiry date?

I'm looking to create a set where after a set period of time (a week, a month, a year) the token expires and all its value is wiped. Is it possible to do this and if so how?
Amie 's user avatar
  • 11
0 votes
1 answer
49 views

I need to understand a line of code inside a contract => startTime: _startTime == 0 ? currentTime() : _startTime

I am reading a contract from this location : https://gist.github.com/rstormsf/7cfb0c6b7a835c0c67b4a394b4fd9383 I am not able to understand the logic in the code line 72 startTime: _startTime == 0 ? ...
Ashish kumar's user avatar
2 votes
1 answer
1k views

Can block.timestamp value change during execution?

I'm facing a doubt while developing an Smart Contract. I was getting current date from block.timestamp several times inside a function. Could this value change during an Smart Contract execution? Or ...
Alexander Herranz's user avatar
0 votes
2 answers
2k views

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 ...
esraa's user avatar
  • 7
54 votes
6 answers
38k views

Time-dependent tests with Hardhat?

For Ganache, there are several solutions. What about Hardhat? They implemented their own local blockchain, Hardhat Network, which is different to Ganache.
Paul Razvan Berg's user avatar
2 votes
1 answer
254 views

Why does Solidity not use the years keyword?

Solidity has keywords like seconds, minutes, hours, days and weeks that are used to specify units of time. Why do they not have years?
Shane Fontaine's user avatar
4 votes
2 answers
1k views

Can the block number be set back in ganache?

I know about tools like ganache-time-traveler that let you advance the block number. But is it possible to go back to a lower value?
Paul Razvan Berg's user avatar
0 votes
1 answer
114 views

What are some practical considerations for leap seconds?

From the solidity docs on time units: Take care if you perform calendar calculations using these units, because not every year equals 365 days and not even every day has 24 hours because of leap ...
Paul Razvan Berg's user avatar
0 votes
1 answer
1k views

How do I add 7 years to a current time expressed as a block.timestamp?

Being new to solidity, I find the docs on the Internet very confusing. I simply want to add 7 years to a uint timeInSevenYearsFromNow = (block.timestamp).add(????); What is the value of ???? and ...
Damir Olejar's user avatar
3 votes
4 answers
3k views

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/...
Paul Razvan Berg's user avatar
3 votes
1 answer
938 views

In truffle5, how to manipulate time with evm_increaseTime?

I am using truffle 5 and ganache-cli. I've imported increaseTime as import increaseTime from './helper/increaseTime'; and the increaseTime.js file is like this export default function increaseTime(...
Kronos's user avatar
  • 896