Method Difficulty

crypto/hash/hash.go:118–132

Difficulty returns the leading Zero **bit** count of Hash in binary. return -1 indicate the Hash pointer is nil.

()

// Difficulty returns the leading Zero **bit** count of Hash in binary.
//  return -1 indicate the Hash pointer is nil.
func (h *Hash) Difficulty() (difficulty int) {
	if h == nil {
		return -1
	}

	for i := range *h {
		v := (*h)[HashSize-i-1]
		if v != byte(0) {
			difficulty = 8 * i
			difficulty += bits.LeadingZeros8(v)
			return
		}
	}
	return HashSize * 8
}

// MarshalJSON implements the json.Marshaler interface.
func (h Hash) MarshalJSON() ([]byte, error) {