Supplier Listener
Listens for an event in the Supplier's dApp and sends a command to the Supplier's IoT platform.
It consists of three elements:
Blockchain Worker - Parses blockchain transactions, supplies data for Iot Worker or Unique Worker.
IoT Worker - Builds requests to IoT server, uses data from queue supplied by Blockchain Worker or Unique Worker (filters unique data from many Blockchain Workers).
Unique Worker - Filters unique actions by transaction id between Blockchain Workers and Iot Workers.
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