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lightwalletd
Lightwalletd is a backend service that provides a bandwidth-efficient interface to the Zcash blockchain
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
I am not sure where it connects to, I presume a list of servers somewhere in the config, but you can easily run your own one : https://github.com/zcash/lightwalletd
NOTE:
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