def propose_block(self,sortition_result, current_round):
proof,hash,j,indexes = sortition_result
#getting seed
hashstring_for_seed = self.get_seed(current_round) + str(current_round)
proof_for_seed = vrftool.get_proof(self.sk, hashstring_for_seed)
new_seed = vrftool.get_hash(proof_for_seed)
new_block = Block(current_round, self.chain.chain[current_round - 1].block_hash,
self.pk, proof, new_seed)
new_block.gen_bhash()
# caculate the max priority among all subusers
priority, max_index = self.max_priority(new_block.block_hash, indexes)
new_block.add_priority(priority)
# self is proposer then add hihest proority block into self block block_candidates
self.block_candidates[current_round] = list()
# store hash and proof
# hash for seed and proof for random seed for next round
self.block_candidates[current_round].append(new_block)
# construc max pritority message
block_message = Message(self.pk, current_round, self.tokens, new_block.block_hash, entire_block=new_block,
vrf_proof=proof, vrf_hash=hash, priority=priority)
gossip_message = (self.env.now, (self.id,current_round), block_message)
# test message delay
self.gossip_pipes.put(gossip_message)
print(f'node {self.id} sent out proposal msg with block hash {new_block.block_hash}for its peer at time{self.env.now}')
def Sortition(self, secret_key, round, role, thresh_num):
vrfstring = self.get_seed(round) + role
proof = vrftool.get_proof(secret_key, vrfstring)
hash = vrftool.get_hash(proof)
# probs shoud be equal to the threshhold set by the system
# proposers/totla_tokens, varing from 26 to 70
probs = thresh_num / self.chain.total_tokens
#get the subuser number and indexes
js, indexes = self.sub_users(self.tokens, probs, hash)
dirpath = '/scratch/yliu7/'
filename = f'Round{str(round)}sort.txt'
file_path = 'SortRes/' + filename
path = os.path.join(dirpath, file_path)
if js == 0:
return False
else:
result = (proof, hash, js, indexes)
with open(path, "a+") as f:
f.write(f'{self.id},{round},{role},{js} \n')
return result
def Sortition(self,secret_key, round, role, thresh_num): vrfstring = self.get_seed(round) + role proof = vrftool.get_proof(secret_key, vrfstring) hash = vrftool.get_hash(proof) # probs shoud be equal to the threshhold set by the system # proposers/totla_tokens, varing from 26 to 70 probs = thresh_num / self.chain.total_tokens #get the subuser number and indexes js, indexes = self.sub_users(self.tokens, probs, hash) if js==0: return False else: result =(proof,hash,js,indexes) return result
def generate_empty_block(self,current_round): null_priority = hex(0) hashstring_for_seed = self.get_seed(current_round) + str(current_round) proof_for_seed = vrftool.get_proof(system_sk, hashstring_for_seed) new_seed = vrftool.get_hash(proof_for_seed) empty_block = Block(current_round, self.chain.chain[current_round-1].block_hash, author=system_pk,author_proof=proof_for_seed, seed = new_seed, isEmpty=True) empty_block.add_priority(null_priority) return empty_block
def propose_block(self, sortition_result, current_round):
proof, hash, j, indexes = sortition_result
#getting seed
hashstring_for_seed = self.get_seed(current_round) + str(current_round)
proof_for_seed = vrftool.get_proof(self.sk, hashstring_for_seed)
new_seed = vrftool.get_hash(proof_for_seed)
new_block = Block(current_round,
self.chain.chain[current_round - 1].block_hash,
self.pk, proof, new_seed)
new_block.gen_bhash()
# caculate the max priority among all subusers
priority, max_index = self.max_priority(new_block.block_hash, indexes)
new_block.add_priority(priority)
# self is proposer then add hihest proority block into self block block_candidates
self.block_candidates[current_round] = [new_block]
filename = f'{str(current_round)}blockproposals.txt'
file_path = 'RoundStatus/' + filename
dirpath = '/scratch/yliu7/'
folder_path = os.path.join(dirpath, file_path)
with open(folder_path, 'a+') as f:
f.write(f'{new_block.block_hash}\n')
proposal_msg = ('b', current_round, new_block)
priority_msg = ('p', current_round, new_block.block_hash, priority)
self.Max_Priority_Proposal[current_round] = priority
msg_id = 'b' + str(current_round) + new_block.block_hash + priority
pmsg_id = 'p' + str(current_round) + new_block.block_hash + priority
self.Gossiped_Msg.append(msg_id)
self.Gossiped_Msg.append(pmsg_id)
self.Gossip_Msg(priority_msg)
self.Gossip_Msg(proposal_msg)
print(
f'node {self.id} sent out proposal msg with block hash {new_block.block_hash} with priority {priority}for its peer at time{self.env.now}'
)
return j, indexes_of_j
def get_bond(j, user_total, prob):
sum = 0
while j >= 0:
sum += ss.binom.pmf(j, user_total, prob)
j -= 1
return sum
ms = '0x9d'
sk = vrftool.new_sk()
p = vrftool.get_proof(sk, ms)
h = vrftool.get_hash(p)
j, indexes_of_j = subuser(5, 26 / 100000000, h)
algolist = [vrftool.new_sk() for i in range(50000)]
hash = [vrftool.get_hash(vrftool.get_proof(sk, ms)) for sk in algolist]
start = time.time()
count = 0
times = 0
c = 10
while c > 0:
for h in hash:
times += 1
weight = random.randint(1, 500)
print(f'counting for {h} with weight{weight}')
j, indexes_of_j = subuser(weight, 26 / 1000000, h)
if j > 0:
import vrftool
import math
import binascii
newsk = vrftool.new_sk()
print(newsk)
newpk=vrftool.get_pk(newsk)
print(newpk)
ms = '0x9d'
newproof = vrftool.get_proof(newsk,ms)
print(newproof)
newhash = vrftool.get_hash(newproof)
print(newhash)
flag = vrftool.verify_proof(newproof,newpk,ms,newhash)
print(flag)
hash = newhash.decode('utf-8')
print(hash)
val = bin(int(hash,16))
total = pow(2,len(val))
num = int(val,2)
print(num)
print(total)
hashres = num/total
user_total_tokens=5
total = 100
prob = 0.2
#factorial function
def factorial(num):
import vrftool
import math
from utils import bino_bond
import random
subusers = 200
total_tokens = 10000
thresh = 2 / 3
prob = subusers / total_tokens
nodes = [vrftool.new_sk() for x in range(100)]
ms = '0x9d'
proofs = [vrftool.get_proof(node, ms) for node in nodes]
hash = [vrftool.get_hash(proof) for proof in proofs]
p = vrftool.get_proof(nodes[0], ms)
h = vrftool.get_hash(p)
print('vrfproof length', len(p))
print('vrfhash lenthg', len(h), h)
user_tokens = [100 for x in range(100)]
def subusers(user_total_tokens, probs, hash):
print(hash)
bonds = bino_bond(user_total_tokens, probs)
js = 0
hash = hash.decode('utf-8')
val = bin(int(hash, 16))
total = pow(2, 512)
num = int(val, 2)
hashprob = num / total
print(hashprob)
flag = True
