In this rather lengthy section, we will use the aggregation framework to process data from the Ethereum blockchain.
Using our Python code from https://github.com/agiamas/mastering-mongodb/tree/master/chapter_5, we have extracted data from Ethereum and loaded it into our MongoDB database.
Our data resides in two collections, blocks and transactions.
A sample block document has the following fields:
- Number of transactions
- Number of contract internal transactions
- Block hash
- Parent block hash
- Mining difficulty
- Gas used
- Block height
> db.blocks.findOne(){"_id" : ObjectId("595368fbcedea89d3f4fb0ca"),"number_transactions" : ...
