Provide someone, please, a python v 3.7 ,scrypt for multiply Pubkey Bitcoin to scalar, subtract one pubkey from another pubkey, substract scalar from pubkey ?
Here's a Python script that you might find useful:
[Code] Generating addresses from scratch (Python 3.6+).
There's a function in there (named
scale) for multiplying a point by a scalar. There's also a function in there (named
add) for adding two points together; for point subtraction, you can "flip" one of the arguments (i.e. change the
y coordinate to:
-y % secp256k1_field_order) before doing the addition (see:
How to subtract two points on an elliptic curve?). For adding/subtracting a
scalar to/from a
point, I can't help you (I don't believe that operation has a useful definition unless you first convert the scalar into a point).
