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#!/usr/bin/env python3
import json
import argparse
import math
import subprocess
import shutil
import os
def build_network(template):
with open(template) as f:
template_dict = json.load(f)
template_path = os.path.abspath(os.path.dirname(args.template))
script_path = os.path.dirname(__file__)
topology = build_topology(template_dict)
gen_dir = f"{template_path}/generated"
if not os.path.isdir(gen_dir):
os.mkdir(gen_dir)
shutil.copy(f"{script_path}/recipe.json", f"{template_path}/recipe.json")
with open(f"{template_path}/generated/topology.json", 'w') as topology_file:
json.dump(topology, topology_file, indent=4)
netgoal_params = build_netgoal_params(template_dict)
build_net(template_path, netgoal_params)
build_genesis(template_path, netgoal_params, template_dict)
def build_netgoal_params(template_dict):
instances = template_dict['instances']
relay_count = 0
participating_instance_count = 0
non_participating_instance_count = 0
for group in template_dict['groups']:
relay_count += getInstanceCount(instances['relays'], group['percent']['relays'])
participating_instance_count += getInstanceCount(instances['participatingNodes'], group['percent']['participatingNodes'])
non_participating_instance_count += getInstanceCount(instances['nonParticipatingNodes'], group['percent']['nonParticipatingNodes'])
relay_config = instances['relays']['config']
participating_node_config = instances['participatingNodes']['config']
non_participating_node_config = instances['nonParticipatingNodes']['config']
wallets_count = template_dict['network']['wallets']
nodes_count = template_dict['network']['nodes']
npn_count = template_dict['network']['npn']
return [
'-w', str(wallets_count),
'-R', str(relay_count),
'-N', str(participating_instance_count),
'-X', str(non_participating_instance_count),
'-n', str(nodes_count),
'-x', str(npn_count),
'--relay-template', relay_config,
'--node-template', participating_node_config,
'--non-participating-node-template', non_participating_node_config
]
def build_net(template_path, netgoal_params):
args = [
'-t', 'net',
'-o', f"{template_path}/generated/net.json"
]
args.extend(netgoal_params)
netgoal(args, template_path)
def build_genesis(template_path, netgoal_params, template_dict):
args = [
'-t', 'genesis',
'--last-part-key-round', str(100_000),
'-o', f"{template_path}/generated/genesis.json"
]
args.extend(netgoal_params)
netgoal(args, template_path)
if 'ConsensusProtocol' in template_dict['network']:
updateProtocol(f"{template_path}/generated/genesis.json", template_dict['network']['ConsensusProtocol'])
def updateProtocol(genesis_path, consensus_protocol):
with open(genesis_path, 'r') as genfile:
genjson = json.load(genfile)
genjson["ConsensusProtocol"] = consensus_protocol
with open(genesis_path, 'w') as genfile:
json.dump(genjson, genfile, indent="\t")
def netgoal(args, template_path='.'):
cmd = [
'netgoal', 'generate',
'-r', '/dev/null'
]
cmd.extend(args)
subprocess.run(cmd, cwd=template_path)
def build_topology(template_dict):
instances = template_dict['instances']
groups = template_dict['groups']
hosts = build_hosts(instances, groups)
return {
'Hosts': hosts
}
def build_hosts(instances, groups):
relays = []
participating_nodes = []
non_participating_nodes = []
relay_cfg = instances['relays']
participating_node_cfg = instances['participatingNodes']
non_participating_node_cfg = instances['nonParticipatingNodes']
for group in groups:
for i in range(getInstanceCount(relay_cfg, group['percent']['relays'])):
relays.append({
"Name": f"R{len(relays) + 1}",
"Group": group['name'],
"Template": f"AWS-{group['region'].upper()}-{relay_cfg['type']}"
})
for i in range(getInstanceCount(participating_node_cfg, group['percent']['participatingNodes'])):
participating_nodes.append({
"Name": f"N{len(participating_nodes) + 1}",
"Group": group['name'],
"Template": f"AWS-{group['region'].upper()}-{participating_node_cfg['type']}"
})
for i in range(getInstanceCount(non_participating_node_cfg, group['percent']['nonParticipatingNodes'])):
non_participating_nodes.append({
"Name": f"NPN{len(non_participating_nodes) + 1}",
"Group": group['name'],
"Template": f"AWS-{group['region'].upper()}-{non_participating_node_cfg['type']}"
})
hosts = []
hosts.extend(relays)
hosts.extend(participating_nodes)
hosts.extend(non_participating_nodes)
return hosts
def getInstanceCount(instance, percent):
if (percent == 0):
return 0
total_instance_count = instance['count']
instance_count = math.floor(total_instance_count * percent / 100)
return max(instance_count, 1)
def validate_template(template_dict):
groups = template_dict['groups']
total_percent = 0
for group in groups:
total_percent += groups['percent']
if total_percent != 100:
raise Exception(f"Total percentages of groups expected 100, got {total_percent}")
parser = argparse.ArgumentParser(
description="",
)
parser.add_argument(
'-f',
'--template',
help = 'Path to network template',
required=True
)
args = parser.parse_args()
if os.path.isfile(args.template):
build_network(args.template)
else:
print(f"Expected --template option to be set with a path to a network template, was {args.template}")
exit(2)
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