From 3b5bb9fd43eaab2dc902c47b4900b8161b77330a Mon Sep 17 00:00:00 2001
From: David Hill <dhill@mindcry.org>
Date: Wed, 19 Oct 2016 14:02:52 -0400
Subject: [PATCH] btcjson: Add preciousblock

---
 btcjson/chainsvrcmds.go      | 14 ++++++++++++++
 btcjson/chainsvrcmds_test.go | 13 +++++++++++++
 rpcserver.go                 |  3 +++
 3 files changed, 30 insertions(+)

diff --git a/btcjson/chainsvrcmds.go b/btcjson/chainsvrcmds.go
index c16e97ab..352ea938 100644
--- a/btcjson/chainsvrcmds.go
+++ b/btcjson/chainsvrcmds.go
@@ -534,6 +534,19 @@ func NewPingCmd() *PingCmd {
 	return &PingCmd{}
 }
 
+// PreciousBlockCmd defines the preciousblock JSON-RPC command.
+type PreciousBlockCmd struct {
+	BlockHash string
+}
+
+// NewPreciousBlockCmd returns a new instance which can be used to issue a
+// preciousblock JSON-RPC command.
+func NewPreciousBlockCmd(blockHash string) *PreciousBlockCmd {
+	return &PreciousBlockCmd{
+		BlockHash: blockHash,
+	}
+}
+
 // ReconsiderBlockCmd defines the reconsiderblock JSON-RPC command.
 type ReconsiderBlockCmd struct {
 	BlockHash string
@@ -743,6 +756,7 @@ func init() {
 	MustRegisterCmd("help", (*HelpCmd)(nil), flags)
 	MustRegisterCmd("invalidateblock", (*InvalidateBlockCmd)(nil), flags)
 	MustRegisterCmd("ping", (*PingCmd)(nil), flags)
+	MustRegisterCmd("preciousblock", (*PreciousBlockCmd)(nil), flags)
 	MustRegisterCmd("reconsiderblock", (*ReconsiderBlockCmd)(nil), flags)
 	MustRegisterCmd("searchrawtransactions", (*SearchRawTransactionsCmd)(nil), flags)
 	MustRegisterCmd("sendrawtransaction", (*SendRawTransactionCmd)(nil), flags)
diff --git a/btcjson/chainsvrcmds_test.go b/btcjson/chainsvrcmds_test.go
index a34d1047..fcfdc3b9 100644
--- a/btcjson/chainsvrcmds_test.go
+++ b/btcjson/chainsvrcmds_test.go
@@ -681,6 +681,19 @@ func TestChainSvrCmds(t *testing.T) {
 			marshalled:   `{"jsonrpc":"1.0","method":"ping","params":[],"id":1}`,
 			unmarshalled: &btcjson.PingCmd{},
 		},
+		{
+			name: "preciousblock",
+			newCmd: func() (interface{}, error) {
+				return btcjson.NewCmd("preciousblock", "0123")
+			},
+			staticCmd: func() interface{} {
+				return btcjson.NewPreciousBlockCmd("0123")
+			},
+			marshalled: `{"jsonrpc":"1.0","method":"preciousblock","params":["0123"],"id":1}`,
+			unmarshalled: &btcjson.PreciousBlockCmd{
+				BlockHash: "0123",
+			},
+		},
 		{
 			name: "reconsiderblock",
 			newCmd: func() (interface{}, error) {
diff --git a/rpcserver.go b/rpcserver.go
index 5ec19776..c1b20e50 100644
--- a/rpcserver.go
+++ b/rpcserver.go
@@ -230,6 +230,9 @@ var rpcUnimplemented = map[string]struct{}{
 	"getblockchaininfo": {},
 	"getchaintips":      {},
 	"getnetworkinfo":    {},
+	"invalidateblock":   {},
+	"preciousblock":     {},
+	"reconsiderblock":   {},
 }
 
 // Commands that are available to a limited user