From 762482ef2ccff4ea77e9de5e64d7a2da3573fa25 Mon Sep 17 00:00:00 2001
From: Martin Holst Swende <martin@swende.se>
Date: Thu, 6 Dec 2018 15:03:42 +0100
Subject: [PATCH] flags: disallow --dev in combo with --externalsigner

---
 cmd/utils/flags.go | 3 ++-
 node/config.go     | 3 +++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/cmd/utils/flags.go b/cmd/utils/flags.go
index 60f3692a37..448be782b1 100644
--- a/cmd/utils/flags.go
+++ b/cmd/utils/flags.go
@@ -1174,7 +1174,8 @@ func SetEthConfig(ctx *cli.Context, stack *node.Node, cfg *eth.Config) {
 	// Avoid conflicting network flags
 	checkExclusive(ctx, DeveloperFlag, TestnetFlag, RinkebyFlag)
 	checkExclusive(ctx, LightServFlag, SyncModeFlag, "light")
-
+	// Can't use both ephemeral unlocked and external signer
+	checkExclusive(ctx, DeveloperFlag, ExternalSignerFlag)
 	var ks *keystore.KeyStore
 	if keystores := stack.AccountManager().Backends(keystore.KeyStoreType); len(keystores) > 0 {
 		ks = keystores[0].(*keystore.KeyStore)
diff --git a/node/config.go b/node/config.go
index f1b4992683..2cfaa2365b 100644
--- a/node/config.go
+++ b/node/config.go
@@ -436,8 +436,11 @@ func makeAccountManager(conf *Config) (*accounts.Manager, string, error) {
 	// Assemble the account manager and supported backends
 	backends := []accounts.Backend{}
 	if len(conf.ExternalSigner) > 0 {
+		log.Info("Using external signer", "url", conf.ExternalSigner)
 		if extapi, err := external.NewExternalBackend(conf.ExternalSigner); err == nil {
 			backends = append(backends, extapi)
+		} else {
+			log.Info("Error configuring external signer", "error", err)
 		}
 	}
 	if len(backends) == 0 {