Merge pull request #32 from status-im/contact

Contact management

account.go

@@ -12,6 +12,7 @@ type Account struct {
 	PubKey       string
 	Mnemonic     string
 	Username     string
+	Image        string
 	channels     []*Channel
 }
 
@@ -39,19 +40,58 @@ func (a *Account) createAndJoin(name, password string) (*Channel, error) {
 	return a.Join(name, topicID, symKey)
 }
 
+// OnContactRequest executes specified ContactRequestHandler logic when a contact
+// request is received
+func (a *Account) OnContactRequest(fn ContactRequestHandler) error {
+	topicID, err := a.calculatePublicChannelTopicID(discoveryChannelName)
+	if err != nil {
+		return err
+	}
+
+	filterID, err := newShhMessageFilterFormatRequest(a.conn, []string{topicID}, "", a.PubKey)
+	if err != nil {
+		println(err.Error())
+		return err
+	}
+
+	discoveryChannel := &Channel{
+		account:       a,
+		name:          discoveryChannelName,
+		filterID:      filterID,
+		TopicID:       topicID,
+		ChannelPubKey: a.PubKey,
+	}
+
+	_, err = discoveryChannel.Subscribe(func(msg *Msg) {
+		switch c := msg.Properties.(type) {
+		case *NewContactKeyMsg:
+			fn(&Contact{
+				account: a,
+				SymKey:  c.Address,
+				TopicID: c.Topic,
+				Name:    c.Contact.Name,
+				Address: c.Contact.Address,
+				Image:   c.Contact.Image,
+			})
+		}
+	})
+
+	return err
+}
+
 // Join joins a status channel
 func (a *Account) Join(channelName, topicID, symKey string) (*Channel, error) {
-	filterID, err := newShhMessageFilterFormatRequest(a.conn, []string{topicID}, symKey)
+	filterID, err := newShhMessageFilterFormatRequest(a.conn, []string{topicID}, symKey, "")
 	if err != nil {
 		return nil, err
 	}
 
 	ch := &Channel{
-		account:    a,
-		name:       channelName,
-		filterID:   filterID,
-		TopicID:    topicID,
-		ChannelKey: symKey,
+		account:       a,
+		name:          channelName,
+		filterID:      filterID,
+		TopicID:       topicID,
+		ChannelSymKey: symKey,
 	}
 	a.channels = append(a.channels, ch)
 

chan.go

@@ -7,12 +7,15 @@ import (
 	"time"
 )
 
+const discoveryChannelName = "contact-discovery"
+
 // Channel : ...
 type Channel struct {
 	account       *Account
 	name          string
 	filterID      string
-	ChannelKey    string
+	ChannelSymKey string
+	ChannelPubKey string
 	TopicID       string
 	visibility    string
 	subscriptions []*Subscription
@@ -69,9 +72,9 @@ func (c *Channel) ContactRequest(username, image string) error {
 // contact accepts the contact request. It will be sent on the topic that
 // was provided in the NewContactKey message and use the sym-key.
 // Both users will therefore have the same filter.
-func (c *Channel) ConfirmedContactRequest(username, image string) error {
+func (c *Channel) ConfirmedContactRequest(ct *Contact) error {
 	format := `["%s",["%s","%s","%s","%s"]]`
-	msg := fmt.Sprintf(format, ConfirmedContactRequestType, username, image, c.account.Address, "")
+	msg := fmt.Sprintf(format, ConfirmedContactRequestType, c.account.Username, c.account.Image, c.account.Address, "")
 
 	return c.SendPostRawMsg(msg)
 }
@@ -118,7 +121,7 @@ func (c *Channel) ContactUpdateRequest(username, image string) error {
 func (c *Channel) SendPostRawMsg(body string) error {
 	msg := Message{
 		Signature: c.account.AddressKeyID,
-		SymKeyID:  c.ChannelKey,
+		SymKeyID:  c.ChannelSymKey,
 		Payload:   rawrChatMessage(body),
 		Topic:     c.TopicID,
 		TTL:       10,

contact.go

@@ -0,0 +1,30 @@
+package sdk
+
+// Contact details for a known user
+type Contact struct {
+	account *Account
+	ch      *Channel
+	SymKey  string
+	TopicID string
+	Name    string
+	Image   string
+	Address string
+}
+
+// Accept accepts a contact as a friend, sends back a ConfirmedContactRequest
+func (c *Contact) Accept() error {
+	// Add the proposed symkey
+	symkey, err := addSymKey(c.account.conn, c.SymKey)
+	if err != nil {
+		return err
+	}
+	c.ch, err = c.account.Join(c.Name, c.TopicID, symkey)
+	if err != nil {
+		return err
+	}
+
+	return c.ch.ConfirmedContactRequest(c)
+}
+
+// ContactRequestHandler handler for contact requests
+type ContactRequestHandler func(*Contact)

dictionary.go

@@ -7,20 +7,28 @@ func shhGenerateSymKeyFromPasswordRequest(sdk *SDK, password string) (string, er
 }
 
 type shhFilterFormatParam struct {
-	AllowP2P bool     `json:"allowP2P"`
-	Topics   []string `json:"topics"`
-	Type     string   `json:"type"`
-	SymKeyID string   `json:"symKeyID"`
+	AllowP2P     bool     `json:"allowP2P"`
+	Topics       []string `json:"topics"`
+	Type         string   `json:"type"`
+	SymKeyID     string   `json:"symKeyID"`
+	PrivateKeyID string   `json:"privateKeyID"`
 }
 
-func newShhMessageFilterFormatRequest(sdk *SDK, topics []string, symKey string) (string, error) {
+func newShhMessageFilterFormatRequest(sdk *SDK, topics []string, symKey, privateKeyID string) (string, error) {
 	// `{"jsonrpc":"2.0","id":2,"method":"shh_newMessageFilter","params":[{"allowP2P":true,"topics":["%s"],"type":"sym","symKeyID":"%s"}]}`
 	var res string
 	params := &shhFilterFormatParam{
-		AllowP2P: true,
-		Topics:   topics,
-		Type:     "sym",
-		SymKeyID: symKey,
+		AllowP2P:     true,
+		Topics:       topics,
+		Type:         "sym",
+		SymKeyID:     symKey,
+		PrivateKeyID: privateKeyID,
+	}
+	if len(symKey) > 0 {
+		params.SymKeyID = symKey
+	}
+	if len(privateKeyID) > 0 {
+		params.PrivateKeyID = privateKeyID
 	}
 
 	return res, sdk.RPCClient.Call(&res, "shh_newMessageFilter", params)
@@ -83,7 +91,8 @@ func shhGetFilterMessagesRequest(sdk *SDK, filter string) (interface{}, error) {
 // Message message to be sent though ssh_post calls
 type Message struct {
 	Signature string  `json:"sig"`
-	SymKeyID  string  `json:"symKeyID"`
+	SymKeyID  string  `json:"symKeyID,omitempty"`
+	PubKey    string  `json:"pubKey,omitempty"`
 	Payload   string  `json:"payload"`
 	Topic     string  `json:"topic"`
 	TTL       uint32  `json:"ttl"`
@@ -93,5 +102,11 @@ type Message struct {
 
 func shhPostRequest(sdk *SDK, msg *Message) (string, error) {
 	var res string
-	return res, sdk.RPCClient.Call(&res, "shh_post", msg)
+	return res, sdk.RPCClient.Call(&res, "shhext_post", msg)
+}
+
+func addSymKey(sdk *SDK, symKey string) (string, error) {
+	// {"jsonrpc":"2.0","method":"shh_addSymKey", "params":["` + symkey + `"], "id":1}
+	var res string
+	return res, sdk.RPCClient.Call(&res, "shh_addSymKey", symKey)
 }

dictionary_test.go

@@ -59,7 +59,7 @@ func TestDictionaryMethods(t *testing.T) {
 		{
 			Description: "shhPostRequest",
 			Response:    &str,
-			Method:      "shh_post",
+			Method:      "shhext_post",
 			Params:      &Message{},
 			Callback: func(sdk *SDK) {
 				response, err := shhPostRequest(sdk, &Message{})
@@ -100,7 +100,7 @@ func TestDictionaryMethods(t *testing.T) {
 				SymKeyID: "",
 			},
 			Callback: func(sdk *SDK) {
-				response, err := newShhMessageFilterFormatRequest(sdk, []string{}, "")
+				response, err := newShhMessageFilterFormatRequest(sdk, []string{}, "", "")
 				assert.NoError(t, err)
 				assert.NotNil(t, response)
 			},

msg.go

@@ -166,7 +166,7 @@ type ContactMsg struct {
 }
 
 func contactMsgFromProperties(properties []interface{}) *ContactMsg {
-	crProperties := properties[2].([]interface{})
+	crProperties := properties[1].([]interface{})
 
 	return &ContactMsg{
 		Name:     crProperties[0].(string),