Web3j - How to get timestamp for contract creation time?

Question

I've successfully deployed a contract using

Optional<TransactionReceipt> receipt = Contract.deploy(...).send().getTransactionReceipt();

The receipt how ever doesn't return a timestamp. It returns the transaction hash and the blocknumber.

How would I use the web3j library to get the timestamp of the contract creation time?

score 0 · Answer 1 · answered Oct 03 '22 at 21:48

0

You get the timestamp from the block (where the contract creation transaction was included).

let block = await web3.eth.getBlock(nr);
let date = new Date(Number(block.timestamp) * 1000)

answered Oct 03 '22 at 21:48

tenbits

7,568
5
34
53

1

I need the syntax for the Java library implementation Web3j. It doesn't have a ```.getBlock``` method – DIRTY DAVE Oct 03 '22 at 22:10

score 0 · Answer 2 · answered Oct 26 '22 at 22:51

If you have a transaction receipt, you can get a Date object as follows.

TransactionReceipt txnReceipt = ...
...
EthBlock txnBlock = web3j.ethGetBlockByHash(txnReceipt.getBlockHash(),true).send();
long txnBlockTimestamp = txnBlock.getBlock().getTimestamp().longValueExact() * 1000;
Date blockDate = new Date(txnBlockTimestamp);

Web3j - How to get timestamp for contract creation time?

2 Answers2