Desktop platform jail signal callback support

lib/library.go

@@ -5,6 +5,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"os"
+	"unsafe"
 
 	"github.com/NaySoftware/go-fcm"
 	"github.com/ethereum/go-ethereum/log"
@@ -14,6 +15,7 @@ import (
 	"github.com/status-im/status-go/profiling"
 	"github.com/status-im/status-go/sign"
 	"gopkg.in/go-playground/validator.v9"
+	"github.com/status-im/status-go/signal"
 )
 
 // All general log messages in this package should be routed through this logger.
@@ -484,3 +486,9 @@ func ConnectionChange(typ *C.char, expensive C.int) {
 func AppStateChange(state *C.char) {
 	statusBackend.AppStateChange(C.GoString(state))
 }
+
+// SetSignalEventCallback setup geth callback to notify about new jail signal
+//export SetSignalEventCallback
+func SetSignalEventCallback(cb unsafe.Pointer) {
+	signal.SetSignalEventCallback(cb)
+}

signal/signals.c

@@ -198,7 +198,7 @@ bool StatusServiceSignalEvent(const char *jsonEvent) {
 
 #else
 // ======================================================================================
-// cgo compilation (for local tests)
+// cgo compilation (for desktop platforms and local tests)
 // ======================================================================================
 
 #include <stdio.h>
@@ -206,10 +206,21 @@ bool StatusServiceSignalEvent(const char *jsonEvent) {
 #include <stdbool.h>
 #include "_cgo_export.h"
 
+typedef void (*callback)(const char *jsonEvent);
+callback gCallback = 0;
+
 bool StatusServiceSignalEvent(const char *jsonEvent) {
-    NotifyNode((char *)jsonEvent); // re-send notification back to status node
+	if (gCallback) {
+		gCallback(jsonEvent);
+	} else {
+		NotifyNode((char *)jsonEvent); // re-send notification back to status node
+	}
 
 	return true;
 }
 
+void SetEventCallback(void *cb) {
+	gCallback = (callback)cb;
+}
+
 #endif

signal/signals.go

@@ -4,11 +4,14 @@ package signal
 #include <stddef.h>
 #include <stdbool.h>
 extern bool StatusServiceSignalEvent(const char *jsonEvent);
+extern void SetEventCallback(void *cb);
 */
 import "C"
 import (
 	"encoding/json"
 
+	"unsafe"
+
 	"sync"
 
 	"github.com/ethereum/go-ethereum/log"
@@ -82,3 +85,8 @@ func NotifyNode(jsonEvent *C.char) {
 func TriggerTestSignal() {
 	C.StatusServiceSignalEvent(C.CString(`{"answer": 42}`))
 }
+
+// SetSignalEventCallback set callback
+func SetSignalEventCallback(cb unsafe.Pointer) {
+	C.SetEventCallback(cb)
+}