mulSub static method
mul and then sub scalar r = a*b-c
Implementation
static List<int> mulSub(
List<int> scalar1, List<int> scalar2, List<int> scalar3) {
final out = List<int>.filled(32, 0);
CryptoOps.scMulSub(out, scalar1, scalar2, scalar3);
return out.asBytes;
}