c validating business rules - Dht nodes updating
A distributed hash table (DHT) is a class of a decentralized distributed system that provides a lookup service similar to a hash table: (key, value) pairs are stored in a DHT, and any participating node can efficiently retrieve the value associated with a given key.
Responsibility for maintaining the mapping from keys to values is distributed among the nodes, in such a way that a change in the set of participants causes a minimal amount of disruption.
You can use the ed25519-supercop package to generate the appropriate signatures or bittorrent-dht-store-keypair for a more convenient version.
Each node has a globally unique identifier known as the "node ID." Node IDs are chosen at random from the same 160-bit space as Bit Torrent infohashes .
A "distance metric" is used to compare two node IDs or a node ID and an infohash for "closeness." Nodes must maintain a routing table containing the contact information for a small number of other nodes.
Any Bit Torrent peers are likely to be on the DHT as well, so those are also tried. We are now providing our DHT bootstrap server open source on github. Please play with it and contribute fixes, features, and performance improvements.
However, if you just installed a Bit Torrent client, and you don’t have any Bit Torrent peers, you must rely on a bootstrap server. The DHT bootstrapper has some interesting properties.
In particular, they took advantage of increased bandwidth and hard disk capacity to provide a file-sharing service.