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added graph simulation script

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This commit is contained in:
Kevin Froman 2020-10-22 16:23:16 +00:00
parent 77de7e318d
commit b5fe4453ed
1 changed files with 32 additions and 19 deletions
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49
scripts/graph-simulation.py
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@ -1,10 +1,14 @@
from typing import NamedTuple, List from typing import NamedTuple, List, Set
from collections import namedtuple
from hashlib import sha3_256 from hashlib import sha3_256
from secrets import randbelow from secrets import randbelow
from random import SystemRandom from random import SystemRandom
from threading import Thread
from time import sleep
import uuid
WeightedEdge = NamedTuple("WeightedEdge", "node", "weight") WeightedEdge = namedtuple("WeightedEdge", ["node", "weight"])
message_pool: Set["Message"] = set() # This is just to save memory for the simulation message_pool: Set["Message"] = set() # This is just to save memory for the simulation
@ -19,8 +23,9 @@ class Node:
edges: List[WeightedEdge], graph_ids=["main"]): edges: List[WeightedEdge], graph_ids=["main"]):
self.hidden_node = hidden_node self.hidden_node = hidden_node
self.edges = edges self.edges = edges
self.node_id = str(uuid.uuid4())
self._messages: List[str] = list() # hashes point to message_pool self._messages: List[str] = list() # hashes point to message_pool
self._hidden_messages = List[str] = list() self._hidden_messages: List[str] = list()
def sharing_messages(self): def sharing_messages(self):
share = list(self._messages) share = list(self._messages)
@ -31,16 +36,16 @@ class Node:
def add_message(self, hash_id): def add_message(self, hash_id):
if hash_id not in self._messages: if hash_id not in self._messages:
self._messages.append(message.hash_id) self._messages.append(hash_id)
def pick_edge(self): def pick_edge(self):
selected = self.edges[0] selected = self.edges[0]
alt = [] alt = []
for weighted_edge in self.edges[1:]: for weighted_edge in self.edges[1:]:
if weighted_edge.weight > selected.weight: if weighted_edge.weight[0] > selected.weight:
selected = weighted_edge selected = weighted_edge
elif weighted_edge.weight == selected.weight: elif weighted_edge.weight[0] == selected.weight:
alt.append(selected) alt.append(selected)
alt.append(selected) alt.append(selected)
SystemRandom().shuffle(alt) SystemRandom().shuffle(alt)
@ -50,21 +55,23 @@ class Node:
def share_to_edges(self, message_id): def share_to_edges(self, message_id):
edge = self.pick_edge() edge = self.pick_edge()
edge.node.add_message(message_id) edge.node.add_message(message_id)
edge.weight += 1 edge.weight[0] += 1
def lookup_messages(self): def lookup_messages(self):
edge = self.pick_edge() edge = self.pick_edge()
for message in edge.node.sharing_messages: for message in edge.node.sharing_messages():
if message.hash_id not in self._messages: if message.hash_id not in self._messages:
self._messages.append(message.hash_id) self._messages.append(message.hash_id)
edge.weight += 1 print(self.node_id, "found", message.hash_id)
edge.weight[0] += 1
def make_new_connections(self): def make_new_connections(self):
edge = self.pick_edge() edge = self.pick_edge()
for new_edge in edge.edges: for new_edge in edge.node.edges:
if new_edge not in self.edges: if new_edge not in self.edges:
self.edges.append(WeightedEdge(new_edge.node, 0)) self.edges.append(WeightedEdge(new_edge.node, [0]))
edge.weight += 1 print(self.node_id, "added peer", new_edge.node.node_id)
edge.weight[0] += 1
class Message: class Message:
@ -77,16 +84,22 @@ class Message:
self.data = data self.data = data
bootstrap_node = Node(False, []) bootstrap_node = Node(False, [])
graph = [bootstrap_node] graph = [WeightedEdge(bootstrap_node, [0])]
for i in range(10): for i in range(10):
graph.append(Node(False, [bootstrap_node])) graph.append(WeightedEdge(Node(False, [WeightedEdge(bootstrap_node, [0])]), [0]))
m = Message("hello world") m = Message(b"hello world")
message_pool.add(m) message_pool.add(m)
bootstrap_node.add_message(m) bootstrap_node.add_message(m.hash_id)
def node_driver(node):
while True: while True:
for node in graph:
node.make_new_connections() node.make_new_connections()
node.lookup_messages() node.lookup_messages()
bootstrap_node.add_message(m) sleep(1)
for edge in graph:
Thread(target=node_driver, args=[edge.node], daemon=True).start()
input()