ES payment stats

[ArtemKolodko]

Added fields to Elasticsearch:
totalCredits, freeCredits, oneCredits, fiatCredits

[polymorpher]

ES only supports numeric values up to 64-bits (as long type). If we were to cast the values to string, we would lose useful analytics properties such as sum, reduction, and aggregation. I see that the values to be stored are denominated in wei (in terms of fractions of ONE), so the values would be indeed very large (mostly in the order of greater than 10^18), and would have to be stored as string in ES.

Can we convert the values to equivalent USD first, and storing them in ES as double floating point values? I will create the corresponding mappings accordingly in ES

[ArtemKolodko]

Refactored ES payment stats
Convert ONE credits in wei to USD amount (float) with 4 fractional digits

New fields (number):

paymentTotal
paymentFreeCredits
paymentOneCredits
paymentFiatCredits