Today we continue discussing the best practice from storage engineering:

355) P2P is considered a top-heavy network. Top-heavy means we have an inverted pyramid of layers where the bottom layer is the network layer.  This is the substrate that connects different peers.  The overlay nodes management layer handles the management of these peers in terms of routing, location lookup and resource discovery. The layer on top of this is the features management layer which involves security management, resource management, reliability and fault resiliency.

356) Let us take a look at contracts. We discussed this earlier in reference to Merkle trees.  A smart contract can even include code and evaluate dynamically just like a classifier with rules in program order.

357) A utility token issued for authorization need not be opaque. It can be made up of three parts – one which represent the user, another which represents the provider, and an irrefutable part that is like a stamp of authority. The section from the provider may also include scope for the resources authorized.

358) The attestation mechanism itself might vary. This might include, for example, Merkle tree where each node of the tree represents an element of Personally-Identifiable-Information (PII) along with the hash and the hash of the hashes of the child nodes.  The root hash then becomes the fingerprint of the data being attested.

359) An immutable record which has its integrity checked and agreed on an ongoing basis provides a venerable source of truth.

360) A rewarding service increases appeal and usage by customers. This is what makes Blockchain popular.

List <List <int>> getAllArrangements (List <List <int>> selected) {
List <List <int>> ret = new List < List <int>>();
Selected.distinct ().forEach ( x -> ret.addAll (getPermutations (x)));
Return ret;
}