op-geth/ethtrie/slice.go

package ethtrie

import ()

// Helper function for comparing slices
func CompareIntSlice(a, b []int) bool {
	if len(a) != len(b) {
		return false
	}
	for i, v := range a {
		if v != b[i] {
			return false
		}
	}
	return true
}

// Returns the amount of nibbles that match each other from 0 ...
func MatchingNibbleLength(a, b []int) int {
	i := 0
	for CompareIntSlice(a[:i+1], b[:i+1]) && i < len(b) {
		i += 1
	}

	return i
}