From 45ddd8e590a662098c2ee3184d17fe334f998c4a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C5=81ukasz=20Magiera?= <magik6k@gmail.com>
Date: Fri, 26 Jul 2019 01:26:40 +0200
Subject: [PATCH] Don't pannic on walletDefAddr with no addrs

---
 lotuspond/front/src/FullNode.js | 5 ++++-
 node/impl/full.go               | 4 ++++
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/lotuspond/front/src/FullNode.js b/lotuspond/front/src/FullNode.js
index 552308214..d0f12d881 100644
--- a/lotuspond/front/src/FullNode.js
+++ b/lotuspond/front/src/FullNode.js
@@ -80,7 +80,10 @@ class FullNode extends React.Component {
     this.setState(() => ({tipset: tipset}))
 
     const addrss = await this.state.client.call('Filecoin.WalletList', [])
-    const defaultAddr = await this.state.client.call('Filecoin.WalletDefaultAddress', [])
+    let defaultAddr = ""
+    if (addrss.length > 0) {
+      defaultAddr = await this.state.client.call('Filecoin.WalletDefaultAddress', [])
+    }
 
     const balances = await addrss.map(async addr => {
       let balance = 0
diff --git a/node/impl/full.go b/node/impl/full.go
index aa74b5331..f87762594 100644
--- a/node/impl/full.go
+++ b/node/impl/full.go
@@ -2,6 +2,7 @@ package impl
 
 import (
 	"context"
+	"golang.org/x/xerrors"
 
 	"github.com/filecoin-project/go-lotus/api"
 	"github.com/filecoin-project/go-lotus/chain"
@@ -132,6 +133,9 @@ func (a *FullNodeAPI) WalletDefaultAddress(ctx context.Context) (address.Address
 	if err != nil {
 		return address.Undef, err
 	}
+	if len(addrs) == 0 {
+		return address.Undef, xerrors.New("no addresses in wallet")
+	}
 
 	// TODO: store a default address in the config or 'wallet' portion of the repo
 	return addrs[0], nil