Create new smart contract/ function of hashing algorithms

[rober12]

This smart contract/ function has to relate the type of object, the hashing algorithm and the date on which it has become the recommended algorithm.

• Include in the objects a tag indicating the algorithm to be used for the hashing of that object.
• Investigate whether it is possible to add a field to the DID to indicate the hashing algorithm applied to the DID.
• When checking the status of an object via hash if the object does not carry the hashing algorithm tag consult the registry of algorithms to see which one applies, if for the date of the object the recommended algorithm is not correct it is recommended to apply the rest of the algorithms for that type of object and increase the checks.
  - If all checks are negative the default state of an object is considered "Correct".