title: How to read information from ethereum transaction using transactionHash in web3?
body: <p>Say I had updated a variable x as(x=10) inside the smart contract. I stored the transactionHash. Then I again changed the value of x=20 then I'll get a new transaction hash. So is there any way using the transactionHash of the earlier updation(x=10) with which I can see the what value of x it was?</p>