guessCurve
tries to guess the curve from the bit length of the indefinite-length r/s values this will work well in the vast majority of cases, but may fail in pathological edge cases (when r/s have a very large number of leading zeroes)
tries to guess the curve from the bit length of the indefinite-length r/s values this will work well in the vast majority of cases, but may fail in pathological edge cases (when r/s have a very large number of leading zeroes)