github.com/xmplusdev/xmcore@v1.8.11-0.20240412132628-5518b55526af/common/protocol/id.go (about)

     1  package protocol
     2  
     3  import (
     4  	"crypto/md5"
     5  
     6  	"github.com/xmplusdev/xmcore/common"
     7  	"github.com/xmplusdev/xmcore/common/uuid"
     8  )
     9  
    10  const (
    11  	IDBytesLen = 16
    12  )
    13  
    14  // The ID of en entity, in the form of a UUID.
    15  type ID struct {
    16  	uuid   uuid.UUID
    17  	cmdKey [IDBytesLen]byte
    18  }
    19  
    20  // Equals returns true if this ID equals to the other one.
    21  func (id *ID) Equals(another *ID) bool {
    22  	return id.uuid.Equals(&(another.uuid))
    23  }
    24  
    25  func (id *ID) Bytes() []byte {
    26  	return id.uuid.Bytes()
    27  }
    28  
    29  func (id *ID) String() string {
    30  	return id.uuid.String()
    31  }
    32  
    33  func (id *ID) UUID() uuid.UUID {
    34  	return id.uuid
    35  }
    36  
    37  func (id ID) CmdKey() []byte {
    38  	return id.cmdKey[:]
    39  }
    40  
    41  // NewID returns an ID with given UUID.
    42  func NewID(uuid uuid.UUID) *ID {
    43  	id := &ID{uuid: uuid}
    44  	md5hash := md5.New()
    45  	common.Must2(md5hash.Write(uuid.Bytes()))
    46  	common.Must2(md5hash.Write([]byte("c48619fe-8f02-49e0-b9e9-edf763e17e21")))
    47  	md5hash.Sum(id.cmdKey[:0])
    48  	return id
    49  }