Function BigIntToNeoBytes

common/bigint.go:36–65

neo encoding: https://docs.microsoft.com/en-us/dotnet/api/system.numerics.biginteger.tobytearray?view=netframework-4.7.2

(data *big.Int)

// neo encoding: https://docs.microsoft.com/en-us/dotnet/api/system.numerics.biginteger.tobytearray?view=netframework-4.7.2
func BigIntToNeoBytes(data *big.Int) []byte {
	bs := data.Bytes()
	if len(bs) == 0 {
		return []byte{}
	}
	// golang big.Int use big-endian
	bytesReverse(bs)
	// bs now is little-endian
	if data.Sign() < 0 {
		for i, b := range bs {
			bs[i] = ^b
		}
		for i := 0; i < len(bs); i++ {
			if bs[i] == 255 {
				bs[i] = 0
			} else {
				bs[i] += 1
				break
			}
		}
		if bs[len(bs)-1] < 128 {
			bs = append(bs, 255)
		}
	} else {
		if bs[len(bs)-1] >= 128 {
			bs = append(bs, 0)
		}
	}
	return bs
}

func BigIntFromNeoBytes(ba []byte) *big.Int {
	res := big.NewInt(0)