From 21ad496d42011d34e10ba04d92c38c17f37ea120 Mon Sep 17 00:00:00 2001
From: Richard Ramos <info@richardramos.me>
Date: Tue, 14 Mar 2023 06:38:56 -0400
Subject: [PATCH] feat(c-bindings): seenTTL

---
 library/README.md |  3 +++
 library/api.go    |  1 +
 mobile/api.go     |  2 ++
 mobile/config.go  | 11 +++++++++++
 4 files changed, 17 insertions(+)

diff --git a/library/README.md b/library/README.md
index d5f598f7..0bda6b4d 100644
--- a/library/README.md
+++ b/library/README.md
@@ -439,6 +439,9 @@ If a key is `undefined`, or `null`, a default value will be set.
   Default `10`
 - `iWantFollowupTimeSeconds`: Time to wait for a message requested through IWANT following an IHAVE advertisement.
   Default `3` seconds
+- `seenMessagesTTLSeconds`: configures when a previously seen message ID can be forgotten about.
+  Default `120` seconds
+
 
 ### `extern char* waku_new(char* jsonConfig)`
 
diff --git a/library/api.go b/library/api.go
index ea95fb15..82727d9d 100644
--- a/library/api.go
+++ b/library/api.go
@@ -57,6 +57,7 @@ func main() {}
 //   - maxIHaveLength: max number of messages to include in an IHAVE message, also controls the max number of IHAVE ids we will accept and request with IWANT from a peer within a heartbeat. Default `5000`
 //   - maxIHaveMessages: max number of IHAVE messages to accept from a peer within a heartbeat. Default `10`
 //   - iWantFollowupTimeSeconds: Time to wait for a message requested through IWANT following an IHAVE advertisement. Default `3` seconds
+//   - seenMessagesTTLSeconds:  configures when a previously seen message ID can be forgotten about. Default `120` seconds
 //
 // - minPeersToPublish: The minimum number of peers required on a topic to allow broadcasting a message. Default `0`
 // - filter: Enable Filter. Default `false`
diff --git a/mobile/api.go b/mobile/api.go
index 81cdcb22..bad12f9b 100644
--- a/mobile/api.go
+++ b/mobile/api.go
@@ -101,6 +101,8 @@ func NewNode(configJSON string) string {
 			pubsubOpt = append(pubsubOpt, pubsub.WithGossipSubParams(params))
 		}
 
+		pubsubOpt = append(pubsubOpt, pubsub.WithSeenMessagesTTL(GetSeenTTL(config)))
+
 		opts = append(opts, node.WithWakuRelayAndMinPeers(*config.MinPeersToPublish, pubsubOpt...))
 	}
 
diff --git a/mobile/config.go b/mobile/config.go
index 4ddc74d2..89bc792f 100644
--- a/mobile/config.go
+++ b/mobile/config.go
@@ -185,6 +185,9 @@ type GossipSubParams struct {
 	// If the message is not received within this window, a broken promise is declared and
 	// the router may apply bahavioural penalties.
 	IWantFollowupTimeSeconds *int `json:"iWantFollowupTimeSeconds,omitempty"`
+
+	// configures when a previously seen message ID can be forgotten about
+	SeenMessagesTTLSeconds *int `json:"seenMessagesTTLSeconds"`
 }
 
 func getConfig(configJSON string) (wakuConfig, error) {
@@ -255,6 +258,14 @@ func getConfig(configJSON string) (wakuConfig, error) {
 	return config, nil
 }
 
+func GetSeenTTL(cfg wakuConfig) time.Duration {
+	if cfg.GossipSubParams == nil || *cfg.GossipSubParams.SeenMessagesTTLSeconds == 0 {
+		return pubsub.TimeCacheDuration
+	}
+
+	return time.Duration(*cfg.GossipSubParams.SeenMessagesTTLSeconds)
+}
+
 func GetGossipSubParams(cfg *GossipSubParams) pubsub.GossipSubParams {
 	params := pubsub.DefaultGossipSubParams()