March 2019
Intermediate to advanced
636 pages
27h 50m
English
book
Blockchain Development with Hyperledger
by Salman A. Baset, Luc Desrosiers, Nitin Gaur, Petr Novotny
Content preview from Blockchain Development with Hyperledger
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Examining a letter of credit instance
We can see the ID, L73021 AM, and the instance information. It's shown as a JSON document, and you can see that the structure mirrors that in the LetterOfCredit definition, but it has real instance data in it.
You can see that every asset and participant contained within the letter has a class ($class), which is formed from the namespace concatenated with the type name. For example:
"$class": "org.example.loc.LetterOfCredit""$class": "org.example.loc.ProductDetails"
Notice also how the information for this letter has been captured:
"letterId": "L73021 AM""productType": "Computer""quantity": "1250"
Finally, notice how the letter is in its final state:
"status": "CLOSED""closeReason": "Letter has been completed." ...
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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.