I want to get the timestamp of an event.
How can I get time of event fired, if the event data does not contain any time value?
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2 Answers
You can do this by checking the timestamp of the block that the event was included in. For something like web3.js, you can use getBlock:
web3.eth.getBlock(blockHashOrBlockNumber [, returnTransactionObjects] [, callback])
Additionally, you can include the timestamp in the event itself. It would look like this:
pragma solidity ^0.5.5;
contract MyEvetTest {
event MyEvent(uint256 timestamp);
function myFunction() public {
emit MyEvent(block.timestamp);
}
}
answered Aug 6, 2019 at 16:13
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1Great. Feel free to "accept" the answer, so that future viewers will know that this answer solved your issue. Aug 6, 2019 at 17:52
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1I checked entire page, and didn't found any button like "accept", don't know where that gone, here is only two options "share" and "edit" , otherwise I would not have replied thanks in comment because accept=thanks Aug 7, 2019 at 10:44
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There is a check mark under the up and down vote arrows. Try clicking on that to accept. Aug 7, 2019 at 14:35
If you didn't store timestamp in event, you can parse like this
const getTimeByBlock = async(txHash) => {
const blockN = await web3.eth.getTransaction(txHash)
const blockData = await web3.eth.getBlock(blockN.blockNumber)
return blockData.timestamp
}