From d7211dec79f6916d417ac0e5cd125ba5bf07191f Mon Sep 17 00:00:00 2001
From: zelig <viktor.tron@gmail.com>
Date: Mon, 27 Jul 2015 10:50:29 +0200
Subject: [PATCH] etherbase defaults to first account even if created during
 the session

---
 cmd/geth/js_test.go | 3 ++-
 eth/backend.go      | 6 +++++-
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/cmd/geth/js_test.go b/cmd/geth/js_test.go
index aebf2d5526..67c36dfe71 100644
--- a/cmd/geth/js_test.go
+++ b/cmd/geth/js_test.go
@@ -159,7 +159,7 @@ func TestAccounts(t *testing.T) {
 	defer os.RemoveAll(tmp)
 
 	checkEvalJSON(t, repl, `eth.accounts`, `["`+testAddress+`"]`)
-	checkEvalJSON(t, repl, `eth.coinbase`, `null`)
+	checkEvalJSON(t, repl, `eth.coinbase`, `"`+testAddress+`"`)
 	val, err := repl.re.Run(`personal.newAccount("password")`)
 	if err != nil {
 		t.Errorf("expected no error, got %v", err)
@@ -170,6 +170,7 @@ func TestAccounts(t *testing.T) {
 	}
 
 	checkEvalJSON(t, repl, `eth.accounts`, `["`+testAddress+`","`+addr+`"]`)
+
 }
 
 func TestBlockChain(t *testing.T) {
diff --git a/eth/backend.go b/eth/backend.go
index f0fd0f9181..7973d0951e 100644
--- a/eth/backend.go
+++ b/eth/backend.go
@@ -488,7 +488,11 @@ func (s *Ethereum) StartMining(threads int) error {
 func (s *Ethereum) Etherbase() (eb common.Address, err error) {
 	eb = s.etherbase
 	if (eb == common.Address{}) {
-		err = fmt.Errorf("etherbase address must be explicitly specified")
+		addr, e := s.AccountManager().AddressByIndex(0)
+		if e != nil {
+			err = fmt.Errorf("etherbase address must be explicitly specified")
+		}
+		eb = common.HexToAddress(addr)
 	}
 	return
 }