Bls validation

[Neylix]

Description

Handle new BLS aggregration signatures.

• Validation stamp and cross validation stamps are signed using the new mining key
• Replication nodes returns a signed cross validation stamps instead of OK / Error
• Add new ProofOfValidation module that create and validate the cross validation stamps aggregated signatures
• Replication nodes validation is now asynchronous, allowing the coordinator node to create the proof of validation as soon as the threshold is reached
• Coordinator node is responsible to create the proof of validation and share it to other validation nodes

Type of change

• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

Unit test + running multiple nodes (at least 4)

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules