feat: add discV5 to c-bindings

library/README.md

@@ -271,8 +271,11 @@ interface JsonConfig {
     nodeKey?: string;
     keepAliveInterval?: number;
     relay?: boolean;
-    minPeersToPublish?: number
+    minPeersToPublish?: number;
     filter?: boolean;
+    discV5?: boolean;
+    discV5BootstrapNodes?: Array<string>;
+    discV5UDPPort?: number;
 }
 ```
 
@@ -300,6 +303,11 @@ If a key is `undefined`, or `null`, a default value will be set.
   Default `0`.
 - `filter`: Enable filter protocol.
   Default `false`.
+- `discV5`: Enable DiscoveryV5.
+  Default `false`
+- `discV5BootstrapNodes`: Array of bootstrap nodes ENR
+- `discV5UDPPort`: UDP port for DiscoveryV5
+  Default `9000`
   
 For example:
 ```json
@@ -1049,7 +1057,39 @@ An `error` message otherwise.
 }
 ```
 
+## DiscoveryV5
 
+### `extern char* waku_discv5_start()`
+Starts the DiscoveryV5 service to discover and connect to new peers
+
+**Returns**
+
+A [`JsonResponse`](#jsonresponse-type).
+If the execution is successful, the `result` field is set to `true`.
+
+For example:
+
+```json
+{
+  "result": true
+}
+```
+
+### `extern char* waku_discv5_stop()`
+Stops the DiscoveryV5 service
+
+**Returns**
+
+A [`JsonResponse`](#jsonresponse-type).
+If the execution is successful, the `result` field is set to `true`.
+
+For example:
+
+```json
+{
+  "result": true
+}
+```
 ## Utils
 
 ### `extern char* waku_utils_base64_encode(char* data)`

library/api.go

@@ -29,6 +29,9 @@ func main() {}
 // - relay: Enable WakuRelay. Default `true`
 // - minPeersToPublish: The minimum number of peers required on a topic to allow broadcasting a message. Default `0`
 // - filter: Enable Filter. Default `false`
+// - discV5: Enable DiscoveryV5. Default `false`
+// - discV5BootstrapNodes: Array of bootstrap nodes ENR
+// - discV5UDPPort: UDP port for DiscoveryV5
 // - logLevel: Set the log level. Default `INFO`. Allowed values "DEBUG", "INFO", "WARN", "ERROR", "DPANIC", "PANIC", "FATAL"
 //
 //export waku_new

library/api_discovery.go

@@ -6,7 +6,7 @@ import (
 	mobile "github.com/waku-org/go-waku/mobile"
 )
 
-// RetrieveNodes returns a list of multiaddress given a url to a DNS discoverable ENR tree
+// Returns a list of multiaddress given a url to a DNS discoverable ENR tree
 // The nameserver can optionally be specified to resolve the enrtree url. Otherwise NULL or
 // empty to automatically use the default system dns.
 // If ms is greater than 0, the subscription must happen before the timeout
@@ -17,3 +17,17 @@ func waku_dns_discovery(url *C.char, nameserver *C.char, ms C.int) *C.char {
 	response := mobile.DnsDiscovery(C.GoString(url), C.GoString(nameserver), int(ms))
 	return C.CString(response)
 }
+
+// Starts DiscoveryV5 service to discover and connect to new peers
+//export waku_discv5_start
+func waku_discv5_start() *C.char {
+	response := mobile.StartDiscoveryV5()
+	return C.CString(response)
+}
+
+// Stops DiscoveryV5 service
+//export waku_discv5_stop
+func waku_discv5_stop() *C.char {
+	response := mobile.StopDiscoveryV5()
+	return C.CString(response)
+}

mobile/api.go

@@ -19,6 +19,9 @@ import (
 	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/crypto/secp256k1"
+	"github.com/ethereum/go-ethereum/p2p/enode"
+	pubsub "github.com/libp2p/go-libp2p-pubsub"
+	"github.com/libp2p/go-libp2p/core/discovery"
 	"github.com/libp2p/go-libp2p/core/peer"
 	"github.com/multiformats/go-multiaddr"
 	"github.com/waku-org/go-waku/waku/v2/node"
@@ -42,15 +45,18 @@ func randomHex(n int) (string, error) {
 }
 
 type wakuConfig struct {
-	Host              *string `json:"host,omitempty"`
-	Port              *int    `json:"port,omitempty"`
-	AdvertiseAddress  *string `json:"advertiseAddr,omitempty"`
-	NodeKey           *string `json:"nodeKey,omitempty"`
-	LogLevel          *string `json:"logLevel,omitempty"`
-	KeepAliveInterval *int    `json:"keepAliveInterval,omitempty"`
-	EnableRelay       *bool   `json:"relay"`
-	EnableFilter      *bool   `json:"filter"`
-	MinPeersToPublish *int    `json:"minPeersToPublish"`
+	Host                 *string  `json:"host,omitempty"`
+	Port                 *int     `json:"port,omitempty"`
+	AdvertiseAddress     *string  `json:"advertiseAddr,omitempty"`
+	NodeKey              *string  `json:"nodeKey,omitempty"`
+	LogLevel             *string  `json:"logLevel,omitempty"`
+	KeepAliveInterval    *int     `json:"keepAliveInterval,omitempty"`
+	EnableRelay          *bool    `json:"relay"`
+	EnableFilter         *bool    `json:"filter"`
+	MinPeersToPublish    *int     `json:"minPeersToPublish"`
+	EnableDiscV5         *bool    `json:"discV5"`
+	DiscV5BootstrapNodes []string `json:"discV5BootstrapNodes"`
+	DiscV5UDPPort        *int     `json:"discV5UDPPort"`
 }
 
 var defaultHost = "0.0.0.0"
@@ -59,6 +65,8 @@ var defaultKeepAliveInterval = 20
 var defaultEnableRelay = true
 var defaultMinPeersToPublish = 0
 var defaultEnableFilter = false
+var defaultEnableDiscV5 = false
+var defaultDiscV5UDPPort = 9000
 var defaultLogLevel = "INFO"
 
 func getConfig(configJSON string) (wakuConfig, error) {
@@ -82,6 +90,10 @@ func getConfig(configJSON string) (wakuConfig, error) {
 		config.EnableFilter = &defaultEnableFilter
 	}
 
+	if config.EnableDiscV5 == nil {
+		config.EnableDiscV5 = &defaultEnableDiscV5
+	}
+
 	if config.Host == nil {
 		config.Host = &defaultHost
 	}
@@ -90,6 +102,10 @@ func getConfig(configJSON string) (wakuConfig, error) {
 		config.Port = &defaultPort
 	}
 
+	if config.DiscV5UDPPort == nil {
+		config.DiscV5UDPPort = &defaultDiscV5UDPPort
+	}
+
 	if config.KeepAliveInterval == nil {
 		config.KeepAliveInterval = &defaultKeepAliveInterval
 	}
@@ -151,6 +167,18 @@ func NewNode(configJSON string) string {
 		opts = append(opts, node.WithWakuFilter(false))
 	}
 
+	if *config.EnableDiscV5 {
+		var bootnodes []*enode.Node
+		for _, addr := range config.DiscV5BootstrapNodes {
+			bootnode, err := enode.Parse(enode.ValidSchemes, addr)
+			if err != nil {
+				return MakeJSONResponse(err)
+			}
+			bootnodes = append(bootnodes, bootnode)
+		}
+		opts = append(opts, node.WithDiscoveryV5(*config.DiscV5UDPPort, bootnodes, true, pubsub.WithDiscoveryOpts(discovery.Limit(45), discovery.TTL(time.Duration(20)*time.Second))))
+	}
+
 	// for go-libp2p loggers
 	lvl, err := logging.LevelFromString(*config.LogLevel)
 	if err != nil {

mobile/api_discovery.go

@@ -2,6 +2,7 @@ package gowaku
 
 import (
 	"context"
+	"errors"
 	"time"
 
 	"github.com/waku-org/go-waku/waku/v2/dnsdisc"
@@ -37,3 +38,25 @@ func DnsDiscovery(url string, nameserver string, ms int) string {
 
 	return PrepareJSONResponse(ma, nil)
 }
+
+func StartDiscoveryV5() string {
+	if wakuNode == nil {
+		return MakeJSONResponse(errWakuNodeNotReady)
+	}
+	if wakuNode.DiscV5() == nil {
+		return MakeJSONResponse(errors.New("DiscV5 is not mounted"))
+	}
+	err := wakuNode.DiscV5().Start(context.Background())
+	return MakeJSONResponse(err)
+}
+
+func StopDiscoveryV5() string {
+	if wakuNode == nil {
+		return MakeJSONResponse(errWakuNodeNotReady)
+	}
+	if wakuNode.DiscV5() == nil {
+		return MakeJSONResponse(errors.New("DiscV5 is not mounted"))
+	}
+	err := wakuNode.DiscV5().Start(context.Background())
+	return MakeJSONResponse(err)
+}