Introduce Reward Module

[mehmetegemen]

LIP

• To be replaced later with the drafted LIP once it is published (https://research.lisk.com/t/define-state-transitions-of-reward-module/316)

Description

Reward module is responsible for calculating block generator’s reward complying to protocol rules after block execution thus eliminating the need of a reward property in the block header as it was previously.

Tasks

• Create class and constants for Rewards Module #6687
• Implement Reward Module endpoint #6689
• Implement Rewards API #6688
• Implement afterBlockExecute hook of Rewards Module #6690