Please, someone make a scrypt for automatic shifting pubkey to "zero" ? I was try many times and not found any keys I think because of this. Manualy shift all pubkeys to "zero" is f**ing work, trust me please.
i don`t know for what you need shift pub key but any way here is python code and you can launch this code online
https://repl.it/languages/python3
def inverse(x, p):
"""
Calculate the modular inverse of x ( mod p )
"""
inv1 = 1
inv2 = 0
n=1
while p != 1 and p!=0:
quotient = x/ p
inv1, inv2 = inv2, inv1 - inv2 * quotient
x, p = p, x % p
n = n+1
return inv2
def dblpt(pt, p):
"""
Calculate pt+pt = 2*pt
"""
if pt is None:
return None
(x,y)= pt
if y==0:
return None
slope= 3*pow(x,2,p)*pow(2*y,p-2,p)
xsum= pow(slope,2,p)-2*x
ysum= slope*(x-xsum)-y
return (xsum%p, ysum%p)
def addpt(p1,p2, p):
"""
Calculate p1+p2
"""
if p1 is None or p2 is None:
return None
(x1,y1)= p1
(x2,y2)= p2
if x1==x2:
return dblpt(p1, p)
# calculate (y1-y2)/(x1-x2) modulus p
slope=(y1-y2)*pow(x1-x2,p-2,p)
xsum= pow(slope,2,p)-(x1+x2)
ysum= slope*(x1-xsum)-y1
return (xsum%p, ysum%p)
def ptmul(pt,a, p):
"""
Calculate pt*a
"""
scale= pt
acc=None
while a:
if a&1:
if acc is None:
acc= scale
else:
acc= addpt(acc,scale, p)
scale= dblpt(scale, p)
a >>= 1
return acc
def ptdiv(pt,a,p,n):
"""
Calculate pt/a
"""
divpt=inverse(a, n)%n
return ptmul(pt, divpt, p)
def isoncurve(pt,p):
"""
returns True when pt is on the secp256k1 curve
"""
(x,y)= pt
return (y**2 - x**3 - 7)%p == 0
def getuncompressedpub(compressed_key):
"""
returns uncompressed public key
"""
y_parity = int(compressed_key[:2]) - 2
x = int(compressed_key[2:], 16)
a = (pow(x, 3, p) + 7) % p
y = pow(a, (p+1)//4, p)
if y % 2 != y_parity:
y = -y % p
return (x,y)
#secp256k1 constants
Gx=0x79BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F81798
Gy=0x483ADA7726A3C4655DA4FBFC0E1108A8FD17B448A68554199C47D08FFB10D4B8
n=0xfffffffffffffffffffffffffffffffebaaedce6af48a03bbfd25e8cd0364141
p = 2**256 - 2**32 - 977
g= (Gx,Gy)
#CHANGE HERE beginrange and pointstr
beginrange=0x80000000000000000000
pointstr = '037e1238f7b1ce757df94faa9a2eb261bf0aeb9f84dbf81212104e78931c2a19dc'
pt= getuncompressedpub(pointstr)
(subptx,subpty) = ptmul(g, beginrange, p)
result=addpt(pt, (subptx,p-subpty), p)
print("shifted result> 04%064x%064x"%result)
Code have all functions that you need to work with points.
P.S. Kangaroo app automaticly shift range and pubkey if begin range is not zero.
