def derive_public_key(derivation: Ge25519, output_index: int,
B: Ge25519) -> Ge25519:
"""
H_s(derivation || varint(output_index))G + B
"""
check_ed25519point(B)
return tcry.xmr_derive_public_key(derivation, output_index, B)
def derive_public_key(derivation: tcry.Point, output_index: int,
B: tcry.Point) -> tcry.Point:
"""
H_s(derivation || varint(output_index))G + B
"""
tcry.ge25519_check(B)
return tcry.xmr_derive_public_key(None, derivation, output_index, B)
def derive_public_key(derivation, output_index, B):
"""
H_s(derivation || varint(output_index))G + B
"""
ge_frombytes_vartime_check(B) # check some conditions on the point
check_ed25519point(B)
return tcry.xmr_derive_public_key(derivation, output_index, B)