chore: Cbindings allow mounting the Store protocol from libwaku (#2276)

* libwaku: add changes to mount store in self-node
* libwaku: remove unnecessary code for store

examples/cbindings/waku_example.c

@@ -28,6 +28,13 @@ struct ConfigNode {
     char     key[128];
     int         relay;
     char  peers[2048];
+    int         store;
+    char storeNode[2048];
+    char storeRetentionPolicy[64];
+    char storeDbUrl[256];
+    int                 storeVacuum;
+    int            storeDbMigration;
+    int    storeMaxNumDbConnections;
 };
 
 // libwaku Context
@@ -247,23 +254,39 @@ int main(int argc, char** argv) {
     cfgNode.port = 60000;
     cfgNode.relay = 1;
 
+    cfgNode.store = 1;
+    snprintf(cfgNode.storeNode, 2048, "");
+    snprintf(cfgNode.storeRetentionPolicy, 64, "time:6000000");
+    snprintf(cfgNode.storeDbUrl, 256, "postgres://postgres:test123@localhost:5432/postgres");
+    cfgNode.storeVacuum = 0;
+    cfgNode.storeDbMigration = 0;
+    cfgNode.storeMaxNumDbConnections = 30;
+
     if (argp_parse(&argp, argc, argv, 0, 0, &cfgNode)
                     == ARGP_ERR_UNKNOWN) {
         show_help_and_exit();
     }
 
     ctx = waku_init(event_handler, userData);
 
-    char jsonConfig[1024];
-    snprintf(jsonConfig, 1024, "{ \
-                                    \"host\": \"%s\",   \
-                                    \"port\": %d,       \
-                                    \"key\": \"%s\",    \
-                                    \"relay\": %s       \
+    char jsonConfig[2048];
+    snprintf(jsonConfig, 2048, "{ \
+                                    \"host\": \"%s\",    \
+                                    \"port\": %d,        \
+                                    \"key\": \"%s\",     \
+                                    \"relay\": %s,       \
+                                    \"store\": %s,       \
+                                    \"storeDbUrl\": \"%s\",  \
+                                    \"storeRetentionPolicy\": \"%s\",  \
+                                    \"storeMaxNumDbConnections\": %d \
                                 }", cfgNode.host,
                                     cfgNode.port,
                                     cfgNode.key,
-                                    cfgNode.relay ? "true":"false");
+                                    cfgNode.relay ? "true":"false",
+                                    cfgNode.store ? "true":"false",
+                                    cfgNode.storeDbUrl,
+                                    cfgNode.storeRetentionPolicy,
+                                    cfgNode.storeMaxNumDbConnections);
 
     WAKU_CALL( waku_default_pubsub_topic(&ctx, print_default_pubsub_topic, userData) );
     WAKU_CALL( waku_version(&ctx, print_waku_version, userData) );
@@ -272,7 +295,6 @@ int main(int argc, char** argv) {
     printf("Waku Relay enabled: %s\n", cfgNode.relay == 1 ? "YES": "NO");
 
     WAKU_CALL( waku_new(&ctx, jsonConfig, event_handler, userData) );
-
     waku_set_event_callback(event_handler, userData);
     waku_start(&ctx, event_handler, userData);
 
@@ -288,6 +310,7 @@ int main(int argc, char** argv) {
                                     "/waku/2/default-waku/proto",
                                     event_handler,
                                     userData) );
+
     show_main_menu();
     while(1) {
         handle_user_input();

library/callback.nim

@@ -0,0 +1,5 @@
+
+type
+  WakuCallBack* = proc(callerRet: cint,
+                       msg: ptr cchar,
+                       len: csize_t) {.cdecl, gcsafe.}

library/libwaku.nim

@@ -18,8 +18,10 @@ import
   ./waku_thread/inter_thread_communication/requests/node_lifecycle_request,
   ./waku_thread/inter_thread_communication/requests/peer_manager_request,
   ./waku_thread/inter_thread_communication/requests/protocols/relay_request,
+  ./waku_thread/inter_thread_communication/requests/protocols/store_request,
   ./waku_thread/inter_thread_communication/waku_thread_request,
-  ./alloc
+  ./alloc,
+  ./callback
 
 ################################################################################
 ### Wrapper around the waku node
@@ -32,11 +34,6 @@ const RET_OK: cint = 0
 const RET_ERR: cint = 1
 const RET_MISSING_CALLBACK: cint = 2
 
-type
-  WakuCallBack* = proc(callerRet: cint,
-                       msg: ptr cchar,
-                       len: csize_t) {.cdecl, gcsafe.}
-
 ### End of exported types
 ################################################################################
 
@@ -348,5 +345,24 @@ proc waku_connect(ctx: ptr ptr Context,
 
   return RET_OK
 
+proc waku_store_query(ctx: ptr ptr Context,
+                      queryJson: cstring,
+                      peerId: cstring,
+                      timeoutMs: cint,
+                      callback: WakuCallBack,
+                      userData: pointer): cint
+                      {.dynlib, exportc.} =
+
+  ctx[][].userData = userData
+
+  ## TODO: implement the logic that make the "self" node to act as a Store client
+
+  # if sendReqRes.isErr():
+  #   let msg = $sendReqRes.error
+  #   callback(RET_ERR, unsafeAddr msg[0], cast[csize_t](len(msg)))
+  #   return RET_ERR
+
+  return RET_OK
+
 ### End of exported procs
 ################################################################################

library/waku_thread/config.nim

@@ -91,6 +91,71 @@ proc parseRelay(jsonNode: JsonNode,
 
   return true
 
+proc parseStore(jsonNode: JsonNode,
+                store: var bool,
+                storeNode: var string,
+                storeRetentionPolicy: var string,
+                storeDbUrl: var string,
+                storeVacuum: var bool,
+                storeDbMigration: var bool,
+                storeMaxNumDbConnections: var int,
+                jsonResp: var JsonEvent): bool =
+
+  if not jsonNode.contains("store"):
+    ## the store parameter is not required. By default is is disabled
+    store = false
+    return true
+
+  if jsonNode["store"].kind != JsonNodeKind.JBool:
+    jsonResp = JsonErrorEvent.new("The store config param should be a boolean");
+    return false
+
+  store = jsonNode["store"].getBool()
+
+  if jsonNode.contains("storeNode"):
+    if jsonNode["storeNode"].kind != JsonNodeKind.JString:
+      jsonResp = JsonErrorEvent.new("The storeNode config param should be a string");
+      return false
+
+    storeNode = jsonNode["storeNode"].getStr()
+
+  if jsonNode.contains("storeRetentionPolicy"):
+    if jsonNode["storeRetentionPolicy"].kind != JsonNodeKind.JString:
+      jsonResp = JsonErrorEvent.new("The storeRetentionPolicy config param should be a string");
+      return false
+
+    storeRetentionPolicy = jsonNode["storeRetentionPolicy"].getStr()
+
+  if jsonNode.contains("storeDbUrl"):
+    if jsonNode["storeDbUrl"].kind != JsonNodeKind.JString:
+      jsonResp = JsonErrorEvent.new("The storeDbUrl config param should be a string");
+      return false
+
+    storeDbUrl = jsonNode["storeDbUrl"].getStr()
+
+  if jsonNode.contains("storeVacuum"):
+    if jsonNode["storeVacuum"].kind != JsonNodeKind.JBool:
+      jsonResp = JsonErrorEvent.new("The storeVacuum config param should be a bool");
+      return false
+
+    storeVacuum = jsonNode["storeVacuum"].getBool()
+
+  if jsonNode.contains("storeDbMigration"):
+    if jsonNode["storeDbMigration"].kind != JsonNodeKind.JBool:
+      jsonResp = JsonErrorEvent.new("The storeDbMigration config param should be a bool");
+      return false
+
+    storeDbMigration = jsonNode["storeDbMigration"].getBool()
+
+  if jsonNode.contains("storeMaxNumDbConnections"):
+    if jsonNode["storeMaxNumDbConnections"].kind != JsonNodeKind.JInt:
+      jsonResp = JsonErrorEvent.new("The storeMaxNumDbConnections config param should be an int");
+      return false
+
+    storeMaxNumDbConnections = jsonNode["storeMaxNumDbConnections"].getInt()
+
+  return true
+
 proc parseTopics(jsonNode: JsonNode, topics: var seq[string]) =
   if jsonNode.contains("topics"):
     for topic in jsonNode["topics"].items:
@@ -103,14 +168,20 @@ proc parseConfig*(configNodeJson: string,
                   netConfig: var NetConfig,
                   relay: var bool,
                   topics: var seq[string],
+                  store: var bool,
+                  storeNode: var string,
+                  storeRetentionPolicy: var string,
+                  storeDbUrl: var string,
+                  storeVacuum: var bool,
+                  storeDbMigration: var bool,
+                  storeMaxNumDbConnections: var int,
                   jsonResp: var JsonEvent): bool =
 
   if configNodeJson.len == 0:
     jsonResp = JsonErrorEvent.new("The configNodeJson is empty")
     return false
 
   var jsonNode: JsonNode
-
   try:
     jsonNode = parseJson(configNodeJson)
   except JsonParsingError:
@@ -152,6 +223,11 @@ proc parseConfig*(configNodeJson: string,
   # topics
   parseTopics(jsonNode, topics)
 
+  # store
+  if not parseStore(jsonNode, store, storeNode, storeRetentionPolicy, storeDbUrl,
+                    storeVacuum, storeDbMigration, storeMaxNumDbConnections, jsonResp):
+    return false
+
   let wakuFlags = CapabilitiesBitfield.init(
         lightpush = false,
         filter = false,

library/waku_thread/inter_thread_communication/requests/node_lifecycle_request.nim

@@ -3,6 +3,7 @@ import
   std/options
 import
   chronos,
+  chronicles,
   stew/results,
   stew/shims/net
 import
@@ -17,7 +18,12 @@ import
   ../../../../waku/node/waku_node,
   ../../../../waku/node/builder,
   ../../../../waku/node/config,
+  ../../../../waku/waku_archive/driver/builder,
+  ../../../../waku/waku_archive/driver,
+  ../../../../waku/waku_archive/retention_policy/builder,
+  ../../../../waku/waku_archive/retention_policy,
   ../../../../waku/waku_relay/protocol,
+  ../../../../waku/waku_store,
   ../../../events/[json_error_event,json_message_event,json_base_event],
   ../../../alloc,
   ../../config
@@ -46,21 +52,91 @@ proc destroyShared(self: ptr NodeLifecycleRequest) =
   deallocShared(self[].configJson)
   deallocShared(self)
 
+proc configureStore(node: WakuNode,
+                    storeNode: string,
+                    storeRetentionPolicy: string,
+                    storeDbUrl: string,
+                    storeVacuum: bool,
+                    storeDbMigration: bool,
+                    storeMaxNumDbConnections: int):
+                    Future[Result[void, string]] {.async.} =
+  ## This snippet is extracted/duplicated from the app.nim file
+
+  var onErrAction = proc(msg: string) {.gcsafe, closure.} =
+    ## Action to be taken when an internal error occurs during the node run.
+    ## e.g. the connection with the database is lost and not recovered.
+    # error "Unrecoverable error occurred", error = msg
+    ## TODO: use a callback given as a parameter
+    discard
+
+  # Archive setup
+  let archiveDriverRes = ArchiveDriver.new(storeDbUrl,
+                                           storeVacuum,
+                                           storeDbMigration,
+                                           storeMaxNumDbConnections,
+                                           onErrAction)
+  if archiveDriverRes.isErr():
+    return err("failed to setup archive driver: " & archiveDriverRes.error)
+
+  let retPolicyRes = RetentionPolicy.new(storeRetentionPolicy)
+  if retPolicyRes.isErr():
+    return err("failed to create retention policy: " & retPolicyRes.error)
+
+  let mountArcRes = node.mountArchive(archiveDriverRes.get(),
+                                      retPolicyRes.get())
+  if mountArcRes.isErr():
+    return err("failed to mount waku archive protocol: " & mountArcRes.error)
+
+  # Store setup
+  try:
+    await mountStore(node)
+  except CatchableError:
+    return err("failed to mount waku store protocol: " & getCurrentExceptionMsg())
+
+  mountStoreClient(node)
+  if storeNode != "":
+    let storeNodeInfo = parsePeerInfo(storeNode)
+    if storeNodeInfo.isOk():
+      node.peerManager.addServicePeer(storeNodeInfo.value, WakuStoreCodec)
+    else:
+      return err("failed to set node waku store peer: " & storeNodeInfo.error)
+
+  return ok()
+
 proc createNode(configJson: cstring):
                 Future[Result[WakuNode, string]] {.async.} =
 
   var privateKey: PrivateKey
   var netConfig = NetConfig.init(ValidIpAddress.init("127.0.0.1"),
                                  Port(60000'u16)).value
+
+  ## relay
   var relay: bool
   var topics = @[""]
+
+  ## store
+  var store: bool
+  var storeNode: string
+  var storeRetentionPolicy: string
+  var storeDbUrl: string
+  var storeVacuum: bool
+  var storeDbMigration: bool
+  var storeMaxNumDbConnections: int
+
   var jsonResp: JsonEvent
 
   if not parseConfig($configJson,
                      privateKey,
                      netConfig,
                      relay,
                      topics,
+                     store,
+                     storeNode,
+                     storeRetentionPolicy,
+                     storeDbUrl,
+                     storeVacuum,
+                     storeDbMigration,
+                     storeMaxNumDbConnections,
                      jsonResp):
     return err($jsonResp)
 
@@ -113,6 +189,15 @@ proc createNode(configJson: cstring):
     await newNode.mountRelay()
     newNode.peerManager.start()
 
+  if store:
+    (await newNode.configureStore(storeNode,
+                                  storeRetentionPolicy,
+                                  storeDbUrl,
+                                  storeVacuum,
+                                  storeDbMigration,
+                                  storeMaxNumDbConnections)).isOkOr:
+      return err("error configuring store: " & $error)
+
   return ok(newNode)
 
 proc process*(self: ptr NodeLifecycleRequest,