mukan-sdk/x/bank/migrations/v3/keys.go

package v3

var DenomAddressPrefix = []byte{0x03}

// CreateDenomAddressPrefix creates a prefix for a reverse index of denomination
// to account balance for that denomination.
func CreateDenomAddressPrefix(denom string) []byte {
	// we add a "zero" byte at the end - null byte terminator, to allow prefix denom prefix
	// scan. Setting it is not needed (key[last] = 0) - because this is the default.
	key := make([]byte, len(DenomAddressPrefix)+len(denom)+1)
	copy(key, DenomAddressPrefix)
	copy(key[len(DenomAddressPrefix):], denom)
	return key
}