Create a new SmartContract for Object Registry

[jftavira]

Reference: https://github.com/alastria/AlastriaEPIC/wiki/Registry-SmartContract

• SmartContract must be upgradeable
• It will contain object hashes, along with the hashing algorithm used and the status
• Only the original creator of an object hash will be able to change the status
• ObjectHash should be at least 512bits or 64bytes
• Status could be any of these status: VALID, ASK OWNER, REVOKE
• See link above for valid transitions
• Functions:
  -- SetObjectStatus(hash,status) -> OK/KO. This function launch 1 event
  - event ObjectStatusUpdated (bytes64 objectHash, Status status); --> launched when the object is registered or updated in blockchain.
  -- GetObjectStatus(hash) -> status
  -- NOTE: Hashes follows PSMHashes model.

[rober12]

@jftavira Would it be interesting to launch an event when the object is revoked or even when it is anchored?

• event ObjectRevoked (bytes64 objectHash);
• event ObjectUpdated (bytes64 ObjectHash, Status status);

Or something similar by changing the names?