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everyone! I have faced with one problem. I can find the transaction hash once transaction is created. Because I am watching the blocks with newBlockHeader event. At the moment, I want to check and update the confirmation number of this transaction. I tried with this

web3.eth.blockNumber-web3.eth.getTransaction(<txhash>).blockNumber.

But it returns NaN. How can I do?

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    What do each of those commands return when run individually? – Richard Horrocks Feb 12 '18 at 16:13
  • web3.eth.blockNumber: undefined web3.eth.getTransaction(<txhash>).blockNumber : undefined Both of 2 values are all undefined. And eth.syncing returns false in geth console – H.Ming Feb 12 '18 at 16:26

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