def transaction(e, d):
"""
"""
k = ecc.ecdsa()
src, dst, dat, lat, mnt, ref = e[:8], e[8:16], e[16:20], e[20:28], e[28:32], e[32:40]
msg, sig, now = e[:-96], e[-96:], ecc.datint()
if src not in d.keys() or dst not in d.keys() or src == dst: return b'Error database'
dls, dld = d[src][4:], d[dst][4:]
zx, zd = ecc.b2h(src), ecc.b2h(dst)
if zx not in d.keys(): return b'Error public key'
k.pt = k.uncompress(ecc.h2b(zx + d[zx]))
if not k.verify(sig, msg): return b'Error signature'
val, bals, bald = ecc.b2i(mnt), balance(src, d), balance(dst, d)
if val <= 0 or bals - val < -MAXBAL or bald + val > MAXBAL: return b'Error value'
os, od = ecc.b2i(d[src][:4]), ecc.b2i(d[dst][:4])
ns, nd = os + 1, od + 1
nhs = ecc.z10 if os == 0 else d[src + ecc.i2b(os, 4)][-10:]
nhd = ecc.z10 if od == 0 else d[dst + ecc.i2b(od, 4)][-10:]
lst_tot, lst_wlt = ecc.b2i(d[ecc.v1][:8]), ecc.b2i(d[ecc.v1][8:])
if ecc.b2i(dls) <= now or ecc.b2i(dld) <= now or ecc.b2i(dat) > now: return b'Error deadline'
if os > 0:
dx = src + ecc.i2b(os, 4)
if len(d[dx]) == NS: dx = d[dx][:12]
if ecc.b2i(d[dx][8:12]) >= ecc.b2i(dat): return b'Wait a minute !'
nws, nwd = ecc.s2b(bals - val, 4), ecc.s2b(bald + val, 4)
sm, dm = dst + ecc.i2b(nd, 4) + nws, src + dat + lat + mnt + ref + sig + nwd
# BEGIN WRITE SECTION
d[src] = ecc.i2b(ns, 4) + dls
d[src + ecc.i2b(ns, 4)] = sm + hashlib.sha1(src + sm + nhs).digest()[:10]
d[dst] = ecc.i2b(nd, 4) + dld
d[dst + ecc.i2b(nd, 4)] = dm + hashlib.sha1(dst + dm + nhd).digest()[:10]
d[ecc.v1] = ecc.i2b(lst_tot + 1, 8) + ecc.i2b(lst_wlt + val, 8)
# END WRITE SECTION
return b'TRANSACTION from ' + zx + b' to ' + zd
def server(s):
t, n, buf, sdest = socket.socket(socket.AF_INET, socket.SOCK_DGRAM), now(), {}, ecc.i2b(0, 4)
t.bind((HOST, s.p))
while (True):
m = t.recvfrom(1024)[0]
if now() - n <= 4: buf[m] = True
else: n, buf = now(), {}
z, dest, price = s.ear[m]+1 if m in s.ear else 0, m[-5:-1], ecc.b2i(m[-1:])
if s.current: s.cts[s.current] = m
print (len(s.cts), s.short(m), z, len(buf), s.short(s.current))
if price > 0 and sdest != dest:
print ('RECEIVE %d' % price)
s.balance += price
sdest = dest
with dbm.open('db%d/hear'%s.p, 'c') as b: # heard ids
s.ear[m], b[m] = z, ecc.i2b(now(), 4) + ecc.i2b(z, 4)
def object(db, ip):
""
k, t = ecc.ecdsa(), socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
print ('Intelligent Object (socket open)')
with dbm.open(db, 'c') as d:
if len(d.keys()) == 0:
k.generate()
sk, pk = ecc.i2b(k.privkey, 48), k.compress(k.pt)
d[b'KEYS'] = pk + sk
t.bind((ip, PORT2))
while True:
(data, addr) = t.recvfrom(1024)
with open('server_pk') as f: pk = f.read()
k.pt = k.uncompress(ecc.z85decode(pk.encode('UTF-8')))
if len(data)>130:
sig, msg = ecc.z85decode(data[:120]), data[120:]
if k.verify(sig, msg):
cod = random.randrange(10000)
t.sendto(b'start counting (code:%04d)' % cod, addr)
dat = time.time()
else:
t.sendto(b'error on signature', addr)
elif len(data) == 4:
with dbm.open(db, 'c') as d:
print (' %d secondes' % int(time.time()-dat))
pk, sk = d[b'KEYS'][:48], d[b'KEYS'][48:]
k.pt, k.privkey = k.uncompress(pk), ecc.b2i(sk)
msg = b'invoice for %d secondes' % int(time.time()-dat)
cmd = ecc.z85encode(k.sign(msg)) + msg
t.sendto(cmd, addr)
else:
t.sendto(b'error', addr)
def server(db, ip):
"""
"""
k = ecc.ecdsa()
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
s.bind((ip, PORT1))
print ('IO-server on %s' % ip)
with dbm.open(db, 'c') as d:
if len(d.keys()) == 0:
k.generate()
sk, pk = ecc.i2b(k.privkey, 48), k.compress(k.pt)
d[b'SERVER'] = pk + sk
d[ecc.v1] = ecc.z8 + ecc.z8
with open('server_pk', 'w') as f: f.write(ecc.z85encode(pk).decode('UTF-8'))
print ('Server Public ID: ' + server_id(d).decode('UTF-8'))
if ecc.v1 in d.keys():
print ('Wealth: %d [%d operations]' % (ecc.b2i(d[ecc.v1][8:]),ecc.b2i(d[ecc.v1][:8]) ))
while True:
(data, addr), o = s.recvfrom(1024), b''
with dbm.open(db, 'c') as d:
if len(data) == 1:
if data == b'v': o = b'Error %02X' % verif(d)
elif data == b'l': o = list_humans(d)
elif data == b's': o = server_id(d)
elif len(data) == 8: o = proof (data, d)
elif len(data) == 16: o = history (data, d)
elif len(data) == 93: o = candidate (data, d)
elif len(data) == 136: o = transaction(data, d)
elif len(data) == 142: o = certificate(data, d)
elif len(data) >= 144 and len(data) <= 256: o = invoice(data, d)
else: o = b'command not found!'
s.sendto(o, addr)
def regrp(s, m):
x, h, g, pr, p, y, z = m[:5], m[5:7], b'_' + m[5:7], m[7:8], ecc.b2i(m[7:8]), 0, 0
with dbm.open(s.n, 'c') as b:
b[x+h] = pr
if h not in b: b[h] = ecc.z6
z = ecc.b2i(b[g]) if g in b else 0
b[g] = ecc.i2b(z + p, 4)
def phone(db, ip, unik=False):
"""
IO CLIENT:
Simulate smart-phone with strong authentication
Commands:
l -> list index of all registered bodies
r email -> register a new body with a new email
<num> -> select <num> as current body
v -> verify all the database
s -> return server public id
o -> return proof of balance at current time, to give to offline objects
c <num> -> request certificate to <num> or generate certificate for <num>
p <num> <val> -> pay <num> body <val> amount of leaf
h -> display history for current body
m -> list all client ids (usually one if flag unik is True)
b -> begin counting resource by object
e -> end counting resource by object
"""
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
print ('IO Client (Phone)\nType ? for help')
my = b''
while True:
if my == b'': my = get_my('1')
cmd, req, bmy = input('%s >' % my.decode('UTF-8')), b'', ecc.h2b(my)
if leaf.reg(re.match('(r|reg|register)\s*(\w{2,20}@\w{2,20}\.\w{2,3})\s*$', cmd)): # 48
with dbm.open(db, 'c') as d:
req = genkey(leaf.reg.v.group(2).encode('UTF-8'), unik, d)
elif re.match('(v|verif|verification)\s*$', cmd): req = b'v'
elif re.match('(l|ls|list)\s*$', cmd): req = b'l'
elif re.match('(s|server)\s*$', cmd): req = b's'
elif re.match('(h|hist|history)\s*$', cmd): req = my
elif re.match('(o|proof)\s*$', cmd): req = bmy
elif re.match('(\?|help)\s*$', cmd): req = b''; print (__doc__, phone.__doc__)
elif re.match('(b|begin|start)\s*$', cmd): req = b''; start_access()
elif re.match('(e|end|stop)\s*$', cmd): req = b''; stop_access()
elif leaf.reg(re.match('(my|)\s*(\d{1,2})\s*$', cmd)): my = get_my(leaf.reg.v.group(2))
elif leaf.reg(re.match('(p|pay)\s*(\d{1,2})\s+(\d{1,3})\s*$', cmd)): # 136
with dbm.open(db) as d:
pld = ecc.i2b(int(leaf.reg.v.group(3)), 4)
req = gene(bmy, ecc.h2b(get_my(leaf.reg.v.group(2))), pld, d)
elif leaf.reg(re.match('(c|crt|cert)\s*(\d{1,2})\s*$', cmd)): # len:142
with dbm.open(db) as d:
req = gene(bmy, ecc.h2b(get_my(leaf.reg.v.group(2))), ecc.z10, d)
elif re.match('(m|my)\s*$', cmd):
with dbm.open(db) as d:
for x in d.keys(): print (ecc.b2h(x).decode('UTF-8'))
req = b''
elif re.match('(q|quit)\s*$', cmd):
s.close()
break
if req:
s.sendto(req, (ip, PORT1))
data, addr = s.recvfrom(2048)
if data:
print (data.decode('UTF-8'))
if req == b'l':
with open('lpub', 'w') as f: f.write(data.decode('UTF-8'))
elif req == bmy:
with open('proof', 'w') as f: f.write(data.decode('UTF-8'))
def next(self):
" Latlong may be used locally only and never shared "
lt, lg = random.randint(100, 200), random.randint(100, 200)
oldi = self.root if self.ids == [] else self.root + self.ids[-1][0]
self.ids.append([
PREFIX + ecc.hashlib.sha256(oldi).digest()[:12] + ecc.i2b(0, 3),
[lt, lg, False]
])
def readsync(s):
with dbm.open(s.n) as b:
g0, g1, k = ecc.z2, ecc.i2b(1, 2), ecc.ecdsa()
msg = b[g0] + ecc.z4
if g1 in b: msg += b[g1] + b[b'_'+g1]
k.privkey = s.getsk()
sgn = k.sign(msg)
return msg + sgn
def genkey(mel, unik, d):
if len(d.keys()) > 0 and unik:
print ('key already defined')
return b''
k = ecc.ecdsa()
k.generate()
sk, pk = ecc.i2b(k.privkey, 48), k.compress(k.pt)
d[pk[:8]] = pk[8:] + sk
return pk + b'%45s' % mel
def sync(s, m):
with dbm.open(s.n, 'c') as b:
g0, g1, k = ecc.z2, ecc.i2b(1, 2), ecc.ecdsa()
k.pt = k.uncompress(s.tid['PUB'] + s.tpk[s.tid['PUB']])
if k.verify(m[-96:], m[:-96]):
if ecc.b2i(b[g0]) < ecc.b2i(m[:6]): b[g0] = m[:6]
if len(m) == 116 and g1 in b:
if ecc.b2i(b[g1]) < ecc.b2i(m[10:16]): b[g1] = m[10:16]
if ecc.b2i(b[b'_'+g1]) < ecc.b2i(m[16:]): b[b'_'+g1] = m[16:20]
def __init__(s):
if not ecc.os.path.exists('backend'): ecc.os.makedirs('backend')
k = ecc.i2b(0, 16)
if not ecc.os.path.exists('backend/keys'):
with dbm.open('backend/keys', 'c') as b:
for i in range(MINF):
k = ecc.hashlib.sha256(s.root + k).digest()[:16]
b[ecc.z56encode(k)] = b''
print('Serving', URLB)
socketserver.TCPServer((HOST, PORT), handler).serve_forever()
def contact(u1, u2, duration=1, proximity=1, price=0):
" 1B:PREFIX + 12B:EphIds + 2B:Hash + 1B:Price -> 16B BLEid "
if price > 0: # Generalized transaction with ECOTAX: 20%
u1.ids[-1][0] = u1.ids[-1][0][:-3] + u2.ids[-1][0][1:3] + ecc.i2b(
price, 1)
u2.bal, u1.bal = u2.bal + price * 4 // 5, u1.bal - price
u1.note[u1.ids[-1][0]] = (u1.pk[:8], u1.k.sign(u1.ids[-1][0])
) # (public id, signature)
u2.refe[u1.ids[-1][0]] = u2.pk[:8] # or False
u1.cts[u2.ids[-1][0]] = (len(u1.ids), duration, proximity)
u2.cts[u1.ids[-1][0]] = (len(u1.ids), duration, proximity)
u1.ids[-1][1][2] = u2.ids[-1][1][2] = True
def bal(s, p): # cross(p) - tax(p) + sum_groups (contrib*rate(p))
if s.rvs[p] == 'PUB' or len(s.tid) < 2: return 0
t, l, q0, q1 = fractions.Fraction(0), len(s.tid)-1, ecc.z2, ecc.i2b(1, 2)
with dbm.open(s.n) as b:
#assert len(s.tid) == ecc.b2i(b[b'_'+q0]) + 1
for x in [y for y in b.keys() if len(y) == MEKL and len(b[y]) == MEVL]:
if p == x[:5]: t -= ecc.b2i(b[x][:3])
elif p == x[5:]: t += ecc.b2i(b[x][:3])
else: assert s.n == 'PUB'
t -= ecc.b2i(b[p]) if p in b else 0
t += fractions.Fraction(ecc.b2i(b[q0]), l)
if q1 in b and b'_' + q1 in b:
r = ecc.b2i(b[p+q1]) if p + q1 in b else 0
t += fractions.Fraction(ecc.b2i(b[q1]) * r, ecc.b2i(b[b'_'+q1]))
return t
def commit(s, r):
t, k = socket.socket(socket.AF_INET, socket.SOCK_DGRAM), ecc.ecdsa()
isn, val, rcp = (r.v.group(1) != 'PUB'), int(r.v.group(2)), r.v.group(3).upper()
assert s.check(s.tid[s.n], val)
assert rcp in s.tid and s.n != rcp and s.n != 'PUB'
assert s.bal(s.tid['PUB']) == 0 and s.time(s.tid['PUB']) == 0
msg = s.tid[s.n] + s.tid[rcp] + ecc.i2b(val, 3) + ecc.z1 + s.pos(s.tid[s.n] + s.tid[rcp])
k.privkey = s.getsk()
sgn = k.sign(msg)
s.add(msg + sgn) # add src
if rcp in s.tbl:
if isn: t.sendto(msg + sgn, (HOST, s.tbl[rcp]))
t.sendto(msg + sgn, (HOST, s.tbl['PUB']))
s.sync(t.recvfrom(1024)[0])
else:
print ('iphone') # iphone case
t.sendto(msg + sgn, (HOST, s.tbl['PUB']))
def reset(s):
with dbm.open(s.n, 'c') as b:
for x in b.keys(): del b[x]
k = ecc.ecdsa()
k.generate()
s.pk = k.compress(k.pt) # My Public key
b[b'&'] = ecc.i2b(k.privkey, 48) # My Private key
#if s.n == 'PUB':
b[ecc.z2], b[b'_'+ecc.z2] = ecc.z6, ecc.z4
b[s.pk[:5]] = ecc.z6
# Types
b[ecc.i2b(0)] = ecc.i2b(15, 3) # Type0=G0:15%
b[ecc.i2b(1)] = ecc.i2b(13, 3) + ecc.i2b(0x100+80, 3) # Type1=G0:13%G1:80%
def pay(s, dst, mt):
s.com[dst.i] = dst
b, ack, la = BloomFilter(100, 0.1), None, dat(now())
assert len(b.dumps()) == BSIZ
m0 = s.tn[-1] if s.tn else s.i + num(0) + ecc.i2b(0, 8) + mnt(0) + bal(
s.b) + dat(0) + b.dumps() + hsh(b'')
if m0[10:18] in s.com: ack = s.com[m0[10:18]].chresp(s.i + m0[8:10])
if m0[8:18] == Z10: ack = s.root.chresp(s.i + m0[8:10])
t = s.c + s.p + m0 + s.k.sign(m0)
for x in [y for y in s.tp if s.tp[y] == True]:
e, s.tp[x] = x[144:], False
assert '%s' % e[:10] not in b
b += '%s' % e[:10]
t += x
s.b -= mt
m = s.i + num(getn(m0) + 1) + dst.i + mnt(mt) + bal(
s.b) + la + b.dumps() + hsh(t)
s.tn.append(m)
return t + dst.i + mnt(mt) + la + ack + s.k.sign(m)
def certificate(e, d):
"""
A(green) if first
B->A if A(green)B(red) then B(orange)
A->B if A(green)B(orange) then B(green)
"""
k = ecc.ecdsa()
src, dst, dat, lat, pld, ref = e[:8], e[8:16], e[16:20], e[20:28], e[28:38], e[38:46]
msg, sig, now = e[:-96], e[-96:], ecc.datint()
if ecc.b2i(dat) > now: return b'future date'
if src not in d.keys() or dst not in d.keys() or src == dst: return b'Error database'
zx = ecc.b2h(src)
if zx not in d.keys(): return b'Error public key'
k.pt = k.uncompress(ecc.h2b(zx + d[zx]))
if not k.verify(sig, msg): return b'Error signature'
green, orang, red = ecc.add1year(ecc.datencode()), ecc.datencode(), ecc.z4
os, od = ecc.b2i(d[src][:4]), ecc.b2i(d[dst][:4])
ns, nd = os + 1, od + 1
nhs = ecc.z10 if os == 0 else d[src + ecc.i2b(os, 4)][-10:]
if os > 0:
dx = src + ecc.i2b(os, 4)
if len(d[dx]) == NS: dx = d[dx][:12]
if ecc.b2i(d[dx][8:12]) >= ecc.b2i(dat): return b'Wait a minute !'
nws = ecc.s2b(balance(src, d), 4)
sm = dst + dat + lat + pld + ref + sig + nws
# START WRITING
if ecc.b2i(d[dst][4:]) > ecc.datint() and d[src][4:] == red:
d[src] = ecc.i2b(ns, 4) + orang
d[src + ecc.i2b(ns, 4)] = sm + hashlib.sha1(src + sm + nhs).digest()[:10]
d[ecc.v1] = ecc.i2b(ecc.b2i(d[ecc.v1][:8]) + 1, 8) + d[ecc.v1][8:]
return b'REQUEST by ' + zx
if ecc.b2i(d[src][4:]) > ecc.datint() and d[dst][4:] != red:
d[dst] = d[dst][:4] + green
d[src] = ecc.i2b(ns, 4) + d[src][4:]
d[src + ecc.i2b(ns, 4)] = sm + hashlib.sha1(src + sm + nhs).digest()[:10]
d[ecc.v1] = ecc.i2b(ecc.b2i(d[ecc.v1][:8]) + 1, 8) + d[ecc.v1][8:16]
return b'CERTIFICATION by ' + zx
# STOP WRITING
else: return b'Error request'
def add(s, m): # 1 cross 2 tax 3 groups
x, r, d, p, v = m[:10], m[:5], m[5:10], ecc.b2i(m[14:16]), ecc.b2i(m[10:13])
g0, g1 = ecc.z2, ecc.i2b(1, 2)
print ('%s pays %d to %s' % (s.rvs[r], v, s.rvs[d]))
with dbm.open(s.n, 'c') as b:
t, u, w, y = v*TAX0//100, 0, 0, ecc.b2i(b[r]) if r in b else 0
if (x in b and p == ecc.b2i(b[x][3:])): w = ecc.b2i(b[x][:3])
else: assert x not in b and p == 0
q0, q1 = ecc.b2i(b[g0]), ecc.b2i(b[g1]) if g1 in b else 0
b[x] = ecc.i2b(w + v - (t+u), 3) + ecc.i2b(1 + p, 2)
b[g0] = ecc.i2b(q0 + t, 6)
if r+g1 in b:
u = v*TAX1//100
b[g1] = ecc.i2b(q1 + u, 6)
b[r] = ecc.i2b(y + t + u, 6) # t+u
def history(e, d):
""
x = ecc.h2b(e)
n = ecc.b2i(d[x][:4])
o = [e + b' nb: %04d balance: %6d' % (n, balance(x, d))]
for i in range(n):
dx = x + ecc.i2b(i+1, 4)
h, zx, y = ecc.b2i(d[dx][-10:]), ecc.b2h(d[dx][:8]), d[dx]
bal = ecc.b2s(y[-14:-10], 4)
if len(y) == NS: dx = d[dx][:12]
if len(y) == NC: val, sg, dat = 0, b' ', ecc.datdecode(d[dx][8:12])
elif len(y) == ND:
val = ecc.b2i(d[dx][20:24])
dat = ecc.datdecode(d[dx][8:12])
sg = b'+'
elif len(y) == NS:
val = ecc.b2i(d[dx][20:24])
dat = ecc.datdecode(d[dx][8:12])
sg = b'-'
o.append(b'%03d %s%3d %8d H:%020X %s %s' % (i+1, sg, val, bal, h, zx, dat.encode('UTF-8')))
o.append(b'Balance: %6d' % balance(x, d) )
return b'\n'.join(o)
def client(s):
m, n, i = s.getid(s.p, ecc.i2b(0, 4)), now(), 0
t = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
with dbm.open('db%d/say'%s.p, 'c') as b: # said ids
while (True):
if s.go and (now() - n >= TICK):
n, i = now(), i + 1
if s.price > 0: i = 0
if not i % EPOC:
dest = ecc.i2b(0, 4)
if s.current in s.cts: dest = s.cts[s.current][1:5]
m = s.getid(s.p, dest)
s.price = 0
s.dump(b)
z = s.say[m]+1 if m in s.say else 0
# lattitude/longitude if captured (data stay on the phone!)
lt, lo = ecc.i2b(random.randint(0, 100), 2), ecc.i2b(random.randint(0, 100), 2)
s.say[m], b[m] = z, ecc.i2b(n, 4) + ecc.i2b(z, 4) + lt + lo
s.current = m
for x in [y for y in range(MAXC) if s.p!=BASP+y]: t.sendto(m, (HOST, BASP+x))
def mnt(x):
return ecc.i2b(x, 4)
def num(x):
return ecc.i2b(x, 2)
def dat(d):
return ecc.i2b(d, 4)
def getid(s, phone, dest):
if s.price>0:
print ('PAYED %d to %s' % (s.price, dest))
s.balance -= s.price
return ecc.i2b(phone%256) + secrets.token_bytes(10) + dest + ecc.i2b(s.price)
def savepks(s):
with dbm.open(s.n, 'c') as b:
for x in s.tpk: b[b'#'+x] = s.tpk[x] # Others Public keys
if len(s.tpk) > 0: b[b'_'+ecc.z2] = ecc.i2b(len(s.tpk)-1, 4)
def dump(s, b):
f = open('db%d/dump'%s.p, 'bw')
for i in b.keys(): f.write(i) # contacts
for c in s.cts: f.write(c[:-1] + ecc.i2b(ecc.b2i(c[-1:]) + 0x10)) # contacts-contacts
f.close()
def group(s, r):
t, g, p = socket.socket(socket.AF_INET, socket.SOCK_DGRAM), int(r.v.group(2)), int(r.v.group(3))%0xFF
msg = s.tid[s.n] + ecc.i2b(g, 2) + ecc.i2b(p, 1)
s.regrp(msg)
t.sendto(msg, (HOST, s.tbl['PUB']))
def verif(d):
"""
check certification !
"""
print ('run check!')
k = ecc.ecdsa()
if len(d.keys()) > 0 and ecc.v1 not in d: return 0x01 # head does not exists
wc, wr, tc, tr, al = 0, 0, 0, 0, 0
lo = []
for i in [x for x in d.keys() if len(x) == 16]:
x = ecc.h2b(i)
if ecc.b2i(d[x][4:]) > ecc.datint(): lo.append(x)
#print (lo)
#find the root
for x in d.keys():
# Length
lk, lv = len(x), len(d[x])
if lk == 1: wr, tr = ecc.b2i(d[x][8:16]), ecc.b2i(d[x][:8])
if lk == 1 and lv != 16: return 0x02 # bad length head
if lk == 5 and lv != 96: return 0x03 # bad length server id
if lk == 8 and lv != 8: return 0x04 # bad length id head
if lk == 12 and lv not in (NS, ND, NC): return 0x05 # bad length operation
if lk == 16 and lv != 80: return 0x06 # bad length pub key
# Public keys
if lk == 12:
if ecc.b2h(x[:8]) not in d: return 0x07 # src id unknown
if ecc.b2h(d[x][:8]) not in d: return 0x08 # dst id unknown
if lk == 8:
# Money supply
al += balance(x, d)
# Dates
dat = ecc.z8
for i in range(ecc.b2i(d[x][:4])):
dx = x + ecc.i2b(i+1, 4)
if len(d[dx]) in (ND, NC):
if d[dx][8:12] <= dat: return 0x09 # bad date increase
dat = d[dx][8:12]
if len(d[dx]) == ND:
if dat > d[x][4:]: return 0x0A # invalid date/dead line
# Signatures
for i in range(ecc.b2i(d[x][:4])):
dx = x + ecc.i2b(i+1, 4)
if len(d[dx]) == NC: src, dst = x, d[dx][:8]
if len(d[dx]) == ND: src, dst = d[dx][:8], dx[:8]
if len(d[dx]) in (NC, ND):
zx = ecc.b2h(src)
if zx not in d.keys(): return 0x0B # Error public key
msg, sig = src + dst + d[dx][8:-110], d[dx][-110:-14]
k = ecc.ecdsa()
k.pt = k.uncompress(ecc.h2b(zx + d[zx]))
if not k.verify(sig, msg): return 0x0C # bad signature
# Hash
h = ecc.z10
for i in range(ecc.b2i(d[x][:4])):
dx = x + ecc.i2b(i+1, 4)
h = hashlib.sha1(x + d[dx][:-10] + h).digest()[:10]
if h != d[dx][-10:]: return 0x0D # bad hash
# Wealth
for i in range(ecc.b2i(d[x][:4])):
dx = x + ecc.i2b(i+1, 4)
if len(d[dx]) == ND: wc += ecc.b2i(d[dx][20:24])
# Operations counter
for i in range(ecc.b2i(d[x][:4])):
dx = x + ecc.i2b(i+1, 4)
if len(d[dx]) in (ND, NC): tc += 1
# Balances
b = 0
for i in range(ecc.b2i(d[x][:4])):
dx = x + ecc.i2b(i+1, 4)
if dx not in d: return 0x0E # missing transaction
if len(d[dx]) == ND: b += ecc.b2i(d[x + ecc.i2b(i+1, 4)][20:24])
elif len(d[dx]) == NS: b -= ecc.b2i(d[d[dx][:12]][20:24])
if b != ecc.b2s(d[dx][-14:-10], 4): return 0x0F # bad balance
if b < -MAXBAL or b > MAXBAL: return 0x10 # Out of bounds
if wc != wr: return 0x11 # bad wealth
if tc != tr: return 0x12 # bad counter
if al != 0: return 0x13 # bad money supply
return 0 # Everythink ok !
def balance(x, d):
""
n = ecc.b2i(d[x][:4])
if n == 0: return 0
return ecc.b2s(d[x + ecc.i2b(n, 4)][-14:-10], 4)
def bal(x):
return ecc.i2b(x, 4)
