# BN254 curve constants

from constants import *

SHA = 'sha256'   # hash type to use with this curve
EFS = 32   # Elliptic curve Field Size in bytes
CurveType = WEIERSTRASS

SexticTwist = D_TYPE
SignOfX = NEGATIVEX
PairingFriendly = BN

x = 0x4080000000000001
if SignOfX == NEGATIVEX:
    p = 36 * x * x * x * x - 36 * x * x * x + 24 * x * x - 6 * x + 1
else:
    p = 36 * x * x * x * x + 36 * x * x * x + 24 * x * x + 6 * x + 1

t = 6 * x * x + 1
r = p + 1 - t

# elliptic curve
A = 0
B = 2

# generator point on G1
Gx = p - 1
Gy = 1

# Frobenius constant
Fra = 0x1B377619212E7C8CB6499B50A846953F850974924D3F77C2E17DE6C06F2A6DE9
Frb = 0x9EBEE691ED1837503EAB22F57B96AC8DC178B6DB2C08850C582193F90D5922A

# Generator point on G2
Pxa = 0x61A10BB519EB62FEB8D8C7E8C61EDB6A4648BBB4898BF0D91EE4224C803FB2B
Pxb = 0x516AAF9BA737833310AA78C5982AA5B1F4D746BAE3784B70D8C34C1E7D54CF3
Pya = 0x21897A06BAF93439A90E096698C822329BD0AE6BDBE09BD19F0E07891CD2B9A
Pyb = 0xEBB2B0E7C8B15268F6D4456F5F38D37B09006FFD739C9578A2D1AEC6B3ACE9B