From 244bb176eb81ce76ed36f950ddd6778b1e73720d Mon Sep 17 00:00:00 2001
From: Prem Chaitanya Prathi <chaitanyaprem@gmail.com>
Date: Tue, 1 Oct 2024 10:21:13 +0530
Subject: [PATCH] feat: add clusterID and shards config to c-bindings (#1228)

---
 library/c/README.md         |  2 ++
 library/config.go           |  2 ++
 library/node.go             |  2 ++
 waku/v2/node/wakuoptions.go | 17 +++++++++++++++++
 4 files changed, 23 insertions(+)

diff --git a/library/c/README.md b/library/c/README.md
index 30c2e060..92dc08bb 100644
--- a/library/c/README.md
+++ b/library/c/README.md
@@ -285,6 +285,8 @@ interface JsonConfig {
     storeRetentionTimeSeconds?: number;
     websocket?: Websocket;
     dns4DomainName?: string;
+    clusterID: int;
+    shards: Array<uint16>;
 }
 ```
 
diff --git a/library/config.go b/library/config.go
index 344d88a3..1574b910 100644
--- a/library/config.go
+++ b/library/config.go
@@ -31,6 +31,8 @@ type WakuConfig struct {
 	RetentionTimeSeconds   *int             `json:"storeRetentionTimeSeconds,omitempty"`
 	DNS4DomainName         string           `json:"dns4DomainName,omitempty"`
 	Websockets             *WebsocketConfig `json:"websockets,omitempty"`
+	ClusterID              int              `json:"clusterID"`
+	Shards                 []uint16         `json:"shards"`
 }
 
 // WebsocketConfig contains all the settings required to setup websocket support in waku
diff --git a/library/node.go b/library/node.go
index f084b85a..5232f4d9 100644
--- a/library/node.go
+++ b/library/node.go
@@ -164,6 +164,8 @@ func NewNode(instance *WakuInstance, configJSON string) error {
 		node.WithPrivateKey(prvKey),
 		node.WithHostAddress(hostAddr),
 		node.WithKeepAlive(10*time.Second, time.Duration(*config.KeepAliveInterval)*time.Second),
+		node.WithClusterID(uint16(config.ClusterID)),
+		node.WithShards(config.Shards),
 	}
 
 	if *config.EnableRelay {
diff --git a/waku/v2/node/wakuoptions.go b/waku/v2/node/wakuoptions.go
index 112cafe6..7e7c5e10 100644
--- a/waku/v2/node/wakuoptions.go
+++ b/waku/v2/node/wakuoptions.go
@@ -319,6 +319,11 @@ func WithPrivateKey(privKey *ecdsa.PrivateKey) WakuNodeOption {
 func WithClusterID(clusterID uint16) WakuNodeOption {
 	return func(params *WakuNodeParameters) error {
 		params.clusterID = clusterID
+		if params.shards == nil {
+			var pshards protocol.RelayShards
+			pshards.ClusterID = params.clusterID
+			params.shards = &pshards
+		}
 		return nil
 	}
 }
@@ -340,6 +345,18 @@ func WithPubSubTopics(topics []string) WakuNodeOption {
 	}
 }
 
+func WithShards(shards []uint16) WakuNodeOption {
+	return func(params *WakuNodeParameters) error {
+		if params.shards == nil {
+			var pshards protocol.RelayShards
+			pshards.ClusterID = params.clusterID
+			params.shards = &pshards
+		}
+		params.shards.ShardIDs = shards
+		return nil
+	}
+}
+
 // WithMaxConnectionsPerIP sets the max number of allowed peers from the same IP
 func WithMaxConnectionsPerIP(limit int) WakuNodeOption {
 	return func(params *WakuNodeParameters) error {