copy_of_2019_05_29_stellar_quorum_sets_stellarbeat_satoshipay_de_example.py

# -*- coding: utf-8 -*-
"""Copy of 2019-05-29 Stellar quorum sets stellarbeat/satoshipay-de example

Automatically generated by Colaboratory.

Original file is located at
    https://colab.research.google.com/drive/1cbCXatyQOEmMaNBSCVT1pMyh3QYpww4d
"""

!pip install stellar-observatory==1.0.1
!pip install typing

#@title Default title text
import stellarobservatory

def analyze_network(nodes, seed_public_key):
    """Checks the quorums with all nodes the seed node depends on"""
    nodes_by_public_key = stellarobservatory.nodes.get_nodes_by_public_key(nodes)
    dependencies = stellarobservatory.nodes.get_node_dependencies(nodes_by_public_key, seed_public_key)
    print('dependencies: {0} ({1})'.format(len(dependencies), stellarobservatory.nodes.convert_public_keys_to_names(nodes_by_public_key, dependencies)))

    quorum_candidates = stellarobservatory.utils.sets.powerset(dependencies)
    print('# quorum candidates: {0}'.format(len(quorum_candidates)))

    quorum_slices_by_public_key = {
        dependency: stellarobservatory.quorum.generate_quorum_slices(
            stellarobservatory.quorum.get_normalized_qset_definition(nodes_by_public_key[dependency])
        ) 
        for dependency in dependencies
    }
    
    quorums = [candidate for candidate in quorum_candidates if candidate and stellarobservatory.quorum.is_quorum(quorum_slices_by_public_key, candidate)]
    print('# quorums: {0}'.format(len(quorums)))
    
    intersection, quorum_a, quorum_b = stellarobservatory.quorum.get_minimal_quorum_intersection(quorums)
    if intersection is not None:
        print('Quorums have quorum intersection with minimal intersection size {0}'.format(len(intersection)))
        print('Minimum intersection example:')
        print('Intersection: {0}'.format(stellarobservatory.nodes.convert_public_keys_to_names(nodes_by_public_key, intersection)))
    else:
        print('No quorum intersection!')
        
    print('Quorum A: {0}'.format(stellarobservatory.nodes.convert_public_keys_to_names(nodes_by_public_key, quorum_a)))
    print('Quorum B: {0}'.format(stellarobservatory.nodes.convert_public_keys_to_names(nodes_by_public_key, quorum_b)))

nodes = stellarobservatory.nodes.get_nodes_from_stellarbeat()
public_key_satoshipay_de = 'GC5SXLNAM3C4NMGK2PXK4R34B5GNZ47FYQ24ZIBFDFOCU6D4KBN4POAE'
analyze_network(nodes, public_key_satoshipay_de)