mobile/bindings: add mobile bindings

mobile/bindings.go

@@ -0,0 +1,61 @@
+// +build ios android
+
+package lndmobile
+
+import (
+	"fmt"
+	"os"
+	"strings"
+
+	flags "github.com/jessevdk/go-flags"
+	"github.com/lightningnetwork/lnd"
+)
+
+// Start starts lnd in a new goroutine.
+//
+// extraArgs can be used to pass command line arguments to lnd that will
+// override what is found in the config file. Example:
+//	extraArgs = "--bitcoin.testnet --lnddir=\"/tmp/folder name/\" --profile=5050"
+func Start(extraArgs string, callback Callback) {
+	// Split the argument string on "--" to get separated command line
+	// arguments.
+	var splitArgs []string
+	for _, a := range strings.Split(extraArgs, "--") {
+		if a == "" {
+			continue
+		}
+		// Finally we prefix any non-empty string with --, and trim
+		// whitespace to mimic the regular command line arguments.
+		splitArgs = append(splitArgs, strings.TrimSpace("--"+a))
+	}
+
+	// Add the extra arguments to os.Args, as that will be parsed during
+	// startup.
+	os.Args = append(os.Args, splitArgs...)
+
+	// We call the main method with the custom in-memory listeners called
+	// by the mobile APIs, such that the grpc server will use these.
+	cfg := lnd.ListenerCfg{
+		WalletUnlocker: walletUnlockerLis,
+		RPCListener:    lightningLis,
+	}
+
+	// Call the "real" main in a nested manner so the defers will properly
+	// be executed in the case of a graceful shutdown.
+	go func() {
+		if err := lnd.Main(cfg); err != nil {
+			if e, ok := err.(*flags.Error); ok &&
+				e.Type == flags.ErrHelp {
+			} else {
+				fmt.Fprintln(os.Stderr, err)
+			}
+			os.Exit(1)
+		}
+	}()
+
+	// TODO(halseth): callback when RPC server is actually running. Since
+	// the RPC server might take a while to start up, the client might
+	// assume it is ready to accept calls when this callback is sent, while
+	// it's not.
+	callback.OnResponse([]byte("started"))
+}