fn mul(p: Secp256k1, s_: [32]u8, endian: std.builtin.Endian) IdentityElementError!Secp256k1
Multiply an elliptic curve point by a scalar. Return error.IdentityElement if the result is the identity element.
p: Secp256k1,
s_: [32]u8,
endian: std.builtin.Endian,