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?

tenbits · Accepted Answer · 2022-10-03 21:48:01Z

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 3, 2022 at 21:48

tenbits

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WHOATEMYNOODLES Over a year ago

I need the syntax for the Java library implementation Web3j. It doesn't have a .getBlock method

gbii · Accepted Answer · 2022-10-26 22:51:28Z

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);

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