rpc: adjust submitblock RPC-call

It should return block hash instead of boolean.

pkg/rpc/client/rpc.go

@@ -398,25 +398,22 @@ func (c *Client) SendRawTransaction(rawTX *transaction.Transaction) (util.Uint25
 }
 
 // SubmitBlock broadcasts a raw block over the NEO network.
-func (c *Client) SubmitBlock(b block.Block) error {
+func (c *Client) SubmitBlock(b block.Block) (util.Uint256, error) {
 	var (
 		params request.RawParams
-		resp   bool
+		resp   = new(result.RelayResult)
 	)
 	buf := io.NewBufBinWriter()
 	b.EncodeBinary(buf.BinWriter)
 	if err := buf.Err; err != nil {
-		return err
+		return util.Uint256{}, err
 	}
 	params = request.NewRawParams(hex.EncodeToString(buf.Bytes()))
 
-	if err := c.performRequest("submitblock", params, &resp); err != nil {
-		return err
+	if err := c.performRequest("submitblock", params, resp); err != nil {
+		return util.Uint256{}, err
 	}
-	if !resp {
-		return errors.New("submitblock returned false")
-	}
-	return nil
+	return resp.Hash, nil
 }
 
 // SignAndPushInvocationTx signs and pushes given script as an invocation

pkg/rpc/client/rpc_test.go

@@ -716,16 +716,19 @@ var rpcClientTestCases = map[string][]rpcClientTestCase{
 		{
 			name: "positive",
 			invoke: func(c *Client) (interface{}, error) {
-				return nil, c.SubmitBlock(block.Block{
+				return c.SubmitBlock(block.Block{
 					Base:         block.Base{},
 					Transactions: nil,
 					Trimmed:      false,
 				})
 			},
-			serverResponse: `{"jsonrpc":"2.0","id":1,"result":true}`,
+			serverResponse: `{"jsonrpc":"2.0","id":1,"result":{"hash":"0x1bdea8f80eb5bd97fade38d5e7fb93b02c9d3e01394e9f4324218132293f7ea6"}}`,
 			result: func(c *Client) interface{} {
-				// no error expected
-				return nil
+				h, err := util.Uint256DecodeStringLE("1bdea8f80eb5bd97fade38d5e7fb93b02c9d3e01394e9f4324218132293f7ea6")
+				if err != nil {
+					panic(fmt.Errorf("can't decode `submitblock` result hash: %v", err))
+				}
+				return h
 			},
 		},
 	},
@@ -840,7 +843,7 @@ var rpcClientErrorCases = map[string][]rpcClientErrorCase{
 		{
 			name: "submitblock_bad_server_answer",
 			invoke: func(c *Client) (interface{}, error) {
-				return nil, c.SubmitBlock(block.Block{
+				return c.SubmitBlock(block.Block{
 					Base:         block.Base{},
 					Transactions: nil,
 					Trimmed:      false,
@@ -996,7 +999,7 @@ var rpcClientErrorCases = map[string][]rpcClientErrorCase{
 		{
 			name: "submitblock_invalid_params_error",
 			invoke: func(c *Client) (interface{}, error) {
-				return nil, c.SubmitBlock(block.Block{})
+				return c.SubmitBlock(block.Block{})
 			},
 		},
 		{
@@ -1178,7 +1181,7 @@ var rpcClientErrorCases = map[string][]rpcClientErrorCase{
 		{
 			name: "submitblock_unmarshalling_error",
 			invoke: func(c *Client) (interface{}, error) {
-				return nil, c.SubmitBlock(block.Block{
+				return c.SubmitBlock(block.Block{
 					Base:         block.Base{},
 					Transactions: nil,
 					Trimmed:      false,

pkg/rpc/server/server.go

@@ -902,7 +902,9 @@ func (s *Server) submitBlock(reqParams request.Params) (interface{}, *response.E
 			return nil, response.ErrValidationFailed
 		}
 	}
-	return true, nil
+	return &result.RelayResult{
+		Hash: b.Hash(),
+	}, nil
 }
 
 func (s *Server) sendrawtransaction(reqParams request.Params) (interface{}, *response.Error) {

pkg/rpc/server/server_test.go

@@ -760,9 +760,9 @@ func testRPCProtocol(t *testing.T, doRPCCall func(string, string, *testing.T) []
 			b := newBlock(t, chain, 1, 0, newTx())
 			body := doRPCCall(fmt.Sprintf(rpc, encodeBlock(t, b)), httpSrv.URL, t)
 			data := checkErrGetResult(t, body, false)
-			var res bool
-			require.NoError(t, json.Unmarshal(data, &res))
-			require.True(t, res)
+			var res = new(result.RelayResult)
+			require.NoError(t, json.Unmarshal(data, res))
+			require.Equal(t, b.Hash(), res.Hash)
 		})
 	})