Introduce PoA module

[shuse2]

LIP

• Introduce PoA module

Motivation

A PoA blockchain is especially attractive for small projects or blockchain applications where the project owners are expected to run the network nodes. Due to the simplicity of its validator selection algorithm, it is also suitable for applications where a high transaction per second throughput is important.

Tasks

Sprint 96

• Bootstrap file and folder structure for Proof of Authority module #8411
• Implement stores for Proof of Authority module #8412
• Implement events for Proof of Authority module #8413
• PoA module genesis schema & relevant type #8500

Sprint 97

• Implement Register Authority command for PoA module #8414
• Implement Update Authority command for PoA module #8415
• Implement Update Generator Key command for PoA module  #8416
• Implement internal function for PoA module #8417
• Implement initGenesisState hook for PoA module #8418
• Implement finalizeGenesisState hook for PoA module #8419
• Implement afterTransactionsExecute hook in PoA module #8420
• Implement endpoints for PoA #8506
• Resolve module method dependencies in PoA #8582
• Registration fee in PoA should be configurable #8583