August 2019
Intermediate to advanced
486 pages
13h 52m
English
Content preview from Mastering Blockchain Programming with Solidity
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Using block and transaction properties
Special variables such as block, msg, now, and tx are globally available in all of your contracts and libraries. Your transaction execution sometimes needs information related to the sender/initiator of the transaction. In some specific calculations related to time, you would need the current timestamp to perform some operations.
Let's understand each of these variables in detail.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.