Add gettxoutproof and verifytxoutproof JSON-RPC infrastructure.

From Bitcoin Core commit 59ed61b3895b022f61970ea7aac0c20e8ba38886

btcjson/chainsvrcmds.go

@@ -434,6 +434,24 @@ func NewGetTxOutCmd(txHash string, vout uint32, includeMempool *bool) *GetTxOutC
 	}
 }
 
+// GetTxOutProofCmd defines the gettxoutproof JSON-RPC command.
+type GetTxOutProofCmd struct {
+	TxIDs     []string
+	BlockHash *string
+}
+
+// NewGetTxOutProofCmd returns a new instance which can be used to issue a
+// gettxoutproof JSON-RPC command.
+//
+// The parameters which are pointers indicate they are optional.  Passing nil
+// for optional parameters will use the default value.
+func NewGetTxOutProofCmd(txIDs []string, blockHash *string) *GetTxOutProofCmd {
+	return &GetTxOutProofCmd{
+		TxIDs:     txIDs,
+		BlockHash: blockHash,
+	}
+}
+
 // GetTxOutSetInfoCmd defines the gettxoutsetinfo JSON-RPC command.
 type GetTxOutSetInfoCmd struct{}
 
@@ -650,6 +668,19 @@ func NewVerifyMessageCmd(address, signature, message string) *VerifyMessageCmd {
 	}
 }
 
+// VerifyTxOutProofCmd defines the verifytxoutproof JSON-RPC command.
+type VerifyTxOutProofCmd struct {
+	Proof string
+}
+
+// NewVerifyTxOutProofCmd returns a new instance which can be used to issue a
+// verifytxoutproof JSON-RPC command.
+func NewVerifyTxOutProofCmd(proof string) *VerifyTxOutProofCmd {
+	return &VerifyTxOutProofCmd{
+		Proof: proof,
+	}
+}
+
 func init() {
 	// No special flags for commands in this file.
 	flags := UsageFlag(0)
@@ -680,6 +711,7 @@ func init() {
 	MustRegisterCmd("getrawmempool", (*GetRawMempoolCmd)(nil), flags)
 	MustRegisterCmd("getrawtransaction", (*GetRawTransactionCmd)(nil), flags)
 	MustRegisterCmd("gettxout", (*GetTxOutCmd)(nil), flags)
+	MustRegisterCmd("gettxoutproof", (*GetTxOutProofCmd)(nil), flags)
 	MustRegisterCmd("gettxoutsetinfo", (*GetTxOutSetInfoCmd)(nil), flags)
 	MustRegisterCmd("getwork", (*GetWorkCmd)(nil), flags)
 	MustRegisterCmd("help", (*HelpCmd)(nil), flags)
@@ -694,4 +726,5 @@ func init() {
 	MustRegisterCmd("validateaddress", (*ValidateAddressCmd)(nil), flags)
 	MustRegisterCmd("verifychain", (*VerifyChainCmd)(nil), flags)
 	MustRegisterCmd("verifymessage", (*VerifyMessageCmd)(nil), flags)
+	MustRegisterCmd("verifytxoutproof", (*VerifyTxOutProofCmd)(nil), flags)
 }

btcjson/chainsvrcmds_test.go

@@ -529,6 +529,36 @@ func TestChainSvrCmds(t *testing.T) {
 				IncludeMempool: btcjson.Bool(true),
 			},
 		},
+		{
+			name: "gettxoutproof",
+			newCmd: func() (interface{}, error) {
+				return btcjson.NewCmd("gettxoutproof", []string{"123", "456"})
+			},
+			staticCmd: func() interface{} {
+				return btcjson.NewGetTxOutProofCmd([]string{"123", "456"}, nil)
+			},
+			marshalled: `{"jsonrpc":"1.0","method":"gettxoutproof","params":[["123","456"]],"id":1}`,
+			unmarshalled: &btcjson.GetTxOutProofCmd{
+				TxIDs: []string{"123", "456"},
+			},
+		},
+		{
+			name: "gettxoutproof optional",
+			newCmd: func() (interface{}, error) {
+				return btcjson.NewCmd("gettxoutproof", []string{"123", "456"},
+					btcjson.String("000000000000034a7dedef4a161fa058a2d67a173a90155f3a2fe6fc132e0ebf"))
+			},
+			staticCmd: func() interface{} {
+				return btcjson.NewGetTxOutProofCmd([]string{"123", "456"},
+					btcjson.String("000000000000034a7dedef4a161fa058a2d67a173a90155f3a2fe6fc132e0ebf"))
+			},
+			marshalled: `{"jsonrpc":"1.0","method":"gettxoutproof","params":[["123","456"],` +
+				`"000000000000034a7dedef4a161fa058a2d67a173a90155f3a2fe6fc132e0ebf"],"id":1}`,
+			unmarshalled: &btcjson.GetTxOutProofCmd{
+				TxIDs:     []string{"123", "456"},
+				BlockHash: btcjson.String("000000000000034a7dedef4a161fa058a2d67a173a90155f3a2fe6fc132e0ebf"),
+			},
+		},
 		{
 			name: "gettxoutsetinfo",
 			newCmd: func() (interface{}, error) {
@@ -866,6 +896,19 @@ func TestChainSvrCmds(t *testing.T) {
 				Message:   "test",
 			},
 		},
+		{
+			name: "verifytxoutproof",
+			newCmd: func() (interface{}, error) {
+				return btcjson.NewCmd("verifytxoutproof", "test")
+			},
+			staticCmd: func() interface{} {
+				return btcjson.NewVerifyTxOutProofCmd("test")
+			},
+			marshalled: `{"jsonrpc":"1.0","method":"verifytxoutproof","params":["test"],"id":1}`,
+			unmarshalled: &btcjson.VerifyTxOutProofCmd{
+				Proof: "test",
+			},
+		},
 	}
 
 	t.Logf("Running %d tests", len(tests))