From a56f5eee8bf40a359c76bcb24ae5d507a20749a9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Oskar=20Thor=C3=A9n?= <ot@oskarthoren.com>
Date: Wed, 28 Apr 2021 19:13:34 +0800
Subject: [PATCH] Libwaku spike start (#510)

* libwaku init e2e

* basic cstring check

* wip
---
 .gitignore                       |  2 ++
 waku/v2/node/libwaku/README.md   | 12 +++++++++++
 waku/v2/node/libwaku/libwaku.c   | 12 +++++++++++
 waku/v2/node/libwaku/libwaku.h   |  9 ++++++++
 waku/v2/node/libwaku/libwaku.nim | 36 ++++++++++++++++++++++++++++++++
 waku/v2/node/libwaku/nim.cfg     |  5 +++++
 6 files changed, 76 insertions(+)
 create mode 100644 waku/v2/node/libwaku/README.md
 create mode 100644 waku/v2/node/libwaku/libwaku.c
 create mode 100644 waku/v2/node/libwaku/libwaku.h
 create mode 100644 waku/v2/node/libwaku/libwaku.nim
 create mode 100644 waku/v2/node/libwaku/nim.cfg

diff --git a/.gitignore b/.gitignore
index 451814e44..ed070c9c8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -34,3 +34,5 @@ rln
 package-lock.json
 node_modules/
 /.update.timestamp
+
+libwaku
diff --git a/waku/v2/node/libwaku/README.md b/waku/v2/node/libwaku/README.md
new file mode 100644
index 000000000..47a4ca50d
--- /dev/null
+++ b/waku/v2/node/libwaku/README.md
@@ -0,0 +1,12 @@
+# libwaku
+
+Exposes a C API that can be used by other environments other than C.
+
+## Running
+
+Make sure you run `$PROJECTDIR/env.sh bash` first. Then:
+
+```
+./build.sh
+./libwaku
+```
diff --git a/waku/v2/node/libwaku/libwaku.c b/waku/v2/node/libwaku/libwaku.c
new file mode 100644
index 000000000..cc126e183
--- /dev/null
+++ b/waku/v2/node/libwaku/libwaku.c
@@ -0,0 +1,12 @@
+#include <stdio.h>
+#include <stddef.h>
+
+#include "libwaku.h"
+
+int main(int argc, char* argv[]) {
+  char* string;
+  NimMain();
+  //echo();
+  string = info("hello there");
+  printf("Info: %s", string);
+}
diff --git a/waku/v2/node/libwaku/libwaku.h b/waku/v2/node/libwaku/libwaku.h
new file mode 100644
index 000000000..f8c722481
--- /dev/null
+++ b/waku/v2/node/libwaku/libwaku.h
@@ -0,0 +1,9 @@
+#include <stdint.h>
+#include <stddef.h>
+
+// Initialize Nim
+void NimMain();
+
+char* info(const char* wakuNode);
+
+void echo();
diff --git a/waku/v2/node/libwaku/libwaku.nim b/waku/v2/node/libwaku/libwaku.nim
new file mode 100644
index 000000000..fc2d967f2
--- /dev/null
+++ b/waku/v2/node/libwaku/libwaku.nim
@@ -0,0 +1,36 @@
+# libwaku
+#
+# Exposes a C API that can be used by other environment than C.
+
+# TODO Start a node
+# TODO Mock info call
+# TODO Write header file
+# TODO Write example C code file
+# TODO Wrap info call
+# TODO Init a node
+
+# proc info*(node: WakuNode): WakuInfo =
+proc info(foo: cstring): cstring {.exportc.} =
+  echo "info about node"
+  echo foo
+  return foo
+
+proc echo() {.exportc.} =
+ echo "echo"
+
+# TODO Here at the moment, start the node
+# Then do info call
+# WIP
+#proc main() {.async.} =
+#  let
+#    rng = crypto.newRng()
+#    conf = WakuNodeConf.load()
+#    (extIp, extTcpPort, extUdpPort) = setupNat(conf.nat, clientId,
+#      Port(uint16(conf.tcpPort) + conf.portsShift),
+#      Port(uint16(conf.udpPort) + conf.portsShift))
+#    node = WakuNode.init(conf.nodeKey, conf.listenAddress,
+#      Port(uint16(conf.tcpPort) + conf.portsShift), extIp, extTcpPort)
+#
+#  await node.start()
+#
+#main()
diff --git a/waku/v2/node/libwaku/nim.cfg b/waku/v2/node/libwaku/nim.cfg
new file mode 100644
index 000000000..29a2312bc
--- /dev/null
+++ b/waku/v2/node/libwaku/nim.cfg
@@ -0,0 +1,5 @@
+-app:staticlib
+o:"libwaku.a"
+noMain
+header
+-d:"chronicles_sinks=textlines"