Dummy adapter

[elpiel]

As part of the Tracking issue #25 for Adapters we need to create a dummy adapter implementation. Since we are starting to work on the Validator Workers and this is one of the first things that we are going to need to be used in the Validator Worker and eventually in Sentry.

Create an adapter crate where we are going to define the traits and later we can implement them in a feature for the dummy and use separate adapter-dummy crate for this.

Reference to JS implementation: https://github.com/AdExNetwork/adex-validator/blob/master/adapters/dummy/index.js

[elpiel]

Currently implemented:

• sign()
• verify()
• getAuthFor

Note: They are Future based! :tada:

To be implemented, once we have the overview what would be the structure:

• unlock()
• sessionFromToken
• getBalanceLeaf
• getSignableStateRoot
• MerkleTree

MerkleTree: I've created a sample repo to test the implementation with https://crates.io/crates/merkletree & https://crates.io/crates/sha3 that can be found here: https://github.com/elpiel/adex-merkle-tree

[elpiel]

resolved in #143