From 1da48ba8161c0499a229e6ba00680f9a30bf1139 Mon Sep 17 00:00:00 2001
From: gz-c <token@protonmail.com>
Date: Wed, 6 Dec 2017 23:49:52 +0800
Subject: [PATCH] Check len(RawTx) != 0

---
 cmd/btcd/btcd.go     | 1 +
 src/scanner/btc.go   | 4 ++--
 src/scanner/store.go | 3 +--
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/cmd/btcd/btcd.go b/cmd/btcd/btcd.go
index 206939b1..73c2205d 100644
--- a/cmd/btcd/btcd.go
+++ b/cmd/btcd/btcd.go
@@ -309,6 +309,7 @@ func convertBlockToGetBlockVerboseResult(block *btcutil.Block) *btcjson.GetBlock
 	for _, tx := range txRawResults {
 		result.Tx = append(result.Tx, tx.Hash)
 	}
+	result.Tx = nil
 
 	return &result
 }
diff --git a/src/scanner/btc.go b/src/scanner/btc.go
index 2d4906a6..edf3d7f8 100644
--- a/src/scanner/btc.go
+++ b/src/scanner/btc.go
@@ -22,7 +22,7 @@ var (
 
 	// ErrBtcdTxindexDisabled is returned if RawTx is missing from GetBlockVerboseResult,
 	// which happens if txindex is not enabled in btcd.
-	ErrBtcdTxindexDisabled = errors.New("len(block.RawTx) != len(block.Tx), make sure txindex is enabled in btcd")
+	ErrBtcdTxindexDisabled = errors.New("len(block.RawTx) == 0, make sure txindex is enabled in btcd")
 )
 
 const (
@@ -112,7 +112,7 @@ func (s *BTCScanner) Run() error {
 		return err
 	}
 
-	if len(initialBlock.RawTx) != len(initialBlock.Tx) {
+	if len(initialBlock.RawTx) == 0 {
 		err := ErrBtcdTxindexDisabled
 		log.WithError(err).Error("Txindex looks disabled, aborting")
 		return err
diff --git a/src/scanner/store.go b/src/scanner/store.go
index 109f41d6..2ed85dac 100644
--- a/src/scanner/store.go
+++ b/src/scanner/store.go
@@ -256,8 +256,7 @@ func (s *BTCStore) ScanBlock(block *btcjson.GetBlockVerboseResult) ([]Deposit, e
 
 // ScanBTCBlock scan the given block and returns the next block hash or error
 func ScanBTCBlock(block *btcjson.GetBlockVerboseResult, depositAddrs []string) ([]Deposit, error) {
-	// Assert that RawTx matches Tx
-	if len(block.RawTx) != len(block.Tx) {
+	if len(block.RawTx) == 0 {
 		return nil, ErrBtcdTxindexDisabled
 	}