diff --git a/models/peer/peer.go b/models/peer/peer.go
index 70ebd4c..ac3386a 100644
--- a/models/peer/peer.go
+++ b/models/peer/peer.go
@@ -8,14 +8,11 @@ import (
 )
 
 // now write a go enum for the state partner with self, blacklist, partner
-
 type PeerState int
 
 const (
-	NONE PeerState = iota
-	SELF
-	PARTNER
-	BLACKLIST
+	OFFLINE PeerState = iota
+	ONLINE
 )
 
 func (m PeerState) String() string {
@@ -26,6 +23,24 @@ func (m PeerState) EnumIndex() int {
 	return int(m)
 }
 
+type PeerRelation int
+
+const (
+	NONE PeerRelation = iota
+	SELF
+	PARTNER
+	BLACKLIST
+	UNKNOWN
+)
+
+func (m PeerRelation) String() string {
+	return [...]string{"NONE", "SELF", "PARTNER", "BLACKLIST"}[m]
+}
+
+func (m PeerRelation) EnumIndex() int {
+	return int(m)
+}
+
 func GetSelf() (utils.ShallowDBObject, string) {
 	d, code, err := NewAccessor(nil).Search(nil, SELF.String(), false)
 	if code != 200 || err != nil || len(d) == 0 {
@@ -47,10 +62,12 @@ func IsMySelf(peerID string) (bool, string) {
 // Peer is a struct that represents a peer
 type Peer struct {
 	utils.AbstractObject
+	PeerID          string          `json:"peer_id" bson:"peer_id" validate:"required"`
 	Url             string          `json:"url" bson:"url" validate:"required"`                       // Url is the URL of the peer (base64url)
 	WalletAddress   string          `json:"wallet_address" bson:"wallet_address" validate:"required"` // WalletAddress is the wallet address of the peer
 	PublicKey       string          `json:"public_key" bson:"public_key" validate:"required"`         // PublicKey is the public key of the peer
 	State           PeerState       `json:"state" bson:"state" default:"0"`
+	Relation        PeerRelation    `json:"relation" bson:"state" default:"0"`
 	ServicesState   map[string]int  `json:"services_state,omitempty" bson:"services_state,omitempty"`
 	FailedExecution []PeerExecution `json:"failed_execution" bson:"failed_execution"` // FailedExecution is the list of failed executions, to be retried
 }
diff --git a/models/peer/peer_cache.go b/models/peer/peer_cache.go
index 931341e..1e999c5 100644
--- a/models/peer/peer_cache.go
+++ b/models/peer/peer_cache.go
@@ -28,19 +28,19 @@ type PeerCache struct {
 }
 
 // urlFormat formats the URL of the peer with the data type API function
-func (p *PeerCache) urlFormat(hostUrl string, dt tools.DataType) string {
+func urlFormat(hostUrl string, dt tools.DataType) string {
 	return hostUrl + "/" + strings.ReplaceAll(dt.API(), "oc-", "")
 }
 
 // checkPeerStatus checks the status of a peer
-func (p *PeerCache) checkPeerStatus(peerID string, appName string) (*Peer, bool) {
+func CheckPeerStatus(peerID string, appName string) (*Peer, bool) {
 	api := tools.API{}
 	access := NewShallowAccessor()
 	res, code, _ := access.LoadOne(peerID) // Load the peer from db
 	if code != 200 {                       // no peer no party
 		return nil, false
 	}
-	url := p.urlFormat(res.(*Peer).Url, tools.PEER) + "/status" // Format the URL
+	url := urlFormat(res.(*Peer).Url, tools.PEER) + "/status" // Format the URL
 	state, services := api.CheckRemotePeer(url)
 	res.(*Peer).ServicesState = services                              // Update the services states of the peer
 	access.UpdateOne(res, peerID)                                     // Update the peer in the db
@@ -61,11 +61,11 @@ func (p *PeerCache) LaunchPeerExecution(peerID string, dataID string,
 	url := ""
 
 	// Check the status of the peer
-	if mypeer, ok := p.checkPeerStatus(peerID, dt.API()); !ok && mypeer != nil {
+	if mypeer, ok := CheckPeerStatus(peerID, dt.API()); !ok && mypeer != nil {
 		// If the peer is not reachable, add the execution to the failed executions list
 		pexec := &PeerExecution{
 			Method:   method.String(),
-			Url:      p.urlFormat((mypeer.Url), dt) + path, // the url is constitued of : host URL + resource path + action path (ex : mypeer.com/datacenter/resourcetype/path/to/action)
+			Url:      urlFormat((mypeer.Url), dt) + path, // the url is constitued of : host URL + resource path + action path (ex : mypeer.com/datacenter/resourcetype/path/to/action)
 			Body:     body,
 			DataType: dt.EnumIndex(),
 			DataID:   dataID,
@@ -78,7 +78,7 @@ func (p *PeerCache) LaunchPeerExecution(peerID string, dataID string,
 			return map[string]interface{}{}, errors.New("peer " + peerID + " not found")
 		}
 		// If the peer is reachable, launch the execution
-		url = p.urlFormat((mypeer.Url), dt) + path     // Format the URL
+		url = urlFormat((mypeer.Url), dt) + path       // Format the URL
 		tmp := mypeer.FailedExecution                  // Get the failed executions list
 		mypeer.FailedExecution = []PeerExecution{}     // Reset the failed executions list
 		NewShallowAccessor().UpdateOne(mypeer, peerID) // Update the peer in the db
diff --git a/models/peer/peer_mongo_accessor.go b/models/peer/peer_mongo_accessor.go
index 0c974d3..1b2804b 100644
--- a/models/peer/peer_mongo_accessor.go
+++ b/models/peer/peer_mongo_accessor.go
@@ -93,6 +93,7 @@ func (a *peerMongoAccessor) GetDefaultFilter(search string) *dbs.Filters {
 			Or: map[string][]dbs.Filter{ // search by name if no filters are provided
 				"abstractobject.name": {{Operator: dbs.LIKE.String(), Value: search}},
 				"url":                 {{Operator: dbs.LIKE.String(), Value: search}},
+				"relation":            {{Operator: dbs.LIKE.String(), Value: search}},
 			},
 		}
 	}
diff --git a/models/peer/tests/peer_test.go b/models/peer/tests/peer_test.go
index 8f4861f..13dfbe5 100644
--- a/models/peer/tests/peer_test.go
+++ b/models/peer/tests/peer_test.go
@@ -51,7 +51,7 @@ func newTestPeer() *peer.Peer {
 		Url:           "http://localhost",
 		WalletAddress: "0x123",
 		PublicKey:     "pubkey",
-		State:         peer.SELF,
+		Relation:      peer.SELF,
 	}
 }