Refactor FutureGetBlockVerboseResult into two types: FutureGetBlockVerboseResult, and FutureGetBlockVerboseTxResult.

Due to differences in how getblock returns data based on the provided verbosity parameter, it's necessary
to have two separate return types based on verbosity. This necessitates a separate unmarshalling function
(represented throughout rpcclient/chain.go as Result.Receive()) to ensure that data is correctly unmarshalled
and returned to the user.

btcjson/chainsvrcmds_test.go

@@ -142,50 +142,43 @@ func TestChainSvrCmds(t *testing.T) {
 		{
 			name: "getblock",
 			newCmd: func() (interface{}, error) {
-				return btcjson.NewCmd("getblock", "123")
+				return btcjson.NewCmd("getblock", "123", btcjson.Int(0))
 			},
 			staticCmd: func() interface{} {
-				return btcjson.NewGetBlockCmd("123", nil, nil)
+				return btcjson.NewGetBlockCmd("123", btcjson.Int(0))
 			},
-			marshalled: `{"jsonrpc":"1.0","method":"getblock","params":["123"],"id":1}`,
+			marshalled: `{"jsonrpc":"1.0","method":"getblock","params":["123",0],"id":1}`,
 			unmarshalled: &btcjson.GetBlockCmd{
 				Hash:      "123",
-				Verbose:   btcjson.Bool(true),
-				VerboseTx: btcjson.Bool(false),
+				Verbosity: btcjson.Int(0),
 			},
 		},
 		{
 			name: "getblock required optional1",
 			newCmd: func() (interface{}, error) {
-				// Intentionally use a source param that is
-				// more pointers than the destination to
-				// exercise that path.
-				verbosePtr := btcjson.Bool(true)
-				return btcjson.NewCmd("getblock", "123", &verbosePtr)
+				return btcjson.NewCmd("getblock", "123", btcjson.Int(1))
 			},
 			staticCmd: func() interface{} {
-				return btcjson.NewGetBlockCmd("123", btcjson.Bool(true), nil)
+				return btcjson.NewGetBlockCmd("123", btcjson.Int(1))
 			},
-			marshalled: `{"jsonrpc":"1.0","method":"getblock","params":["123",true],"id":1}`,
+			marshalled: `{"jsonrpc":"1.0","method":"getblock","params":["123",1],"id":1}`,
 			unmarshalled: &btcjson.GetBlockCmd{
 				Hash:      "123",
-				Verbose:   btcjson.Bool(true),
-				VerboseTx: btcjson.Bool(false),
+				Verbosity: btcjson.Int(1),
 			},
 		},
 		{
 			name: "getblock required optional2",
 			newCmd: func() (interface{}, error) {
-				return btcjson.NewCmd("getblock", "123", true, true)
+				return btcjson.NewCmd("getblock", "123", btcjson.Int(2))
 			},
 			staticCmd: func() interface{} {
-				return btcjson.NewGetBlockCmd("123", btcjson.Bool(true), btcjson.Bool(true))
+				return btcjson.NewGetBlockCmd("123", btcjson.Int(2))
 			},
-			marshalled: `{"jsonrpc":"1.0","method":"getblock","params":["123",true,true],"id":1}`,
+			marshalled: `{"jsonrpc":"1.0","method":"getblock","params":["123",2],"id":1}`,
 			unmarshalled: &btcjson.GetBlockCmd{
 				Hash:      "123",
-				Verbose:   btcjson.Bool(true),
-				VerboseTx: btcjson.Bool(true),
+				Verbosity: btcjson.Int(2),
 			},
 		},
 		{

btcjson/cmdinfo_test.go

@@ -151,7 +151,7 @@ func TestMethodUsageText(t *testing.T) {
 		{
 			name:     "getblock",
 			method:   "getblock",
-			expected: `getblock "hash" (verbose=true verbosetx=false)`,
+			expected: `getblock "hash" (verbosity=1)`,
 		},
 	}
 

btcjson/example_test.go

@@ -21,7 +21,7 @@ func ExampleMarshalCmd() {
 	// convenience function for creating a pointer out of a primitive for
 	// optional parameters.
 	blockHash := "000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f"
-	gbCmd := btcjson.NewGetBlockCmd(blockHash, btcjson.Bool(false), nil)
+	gbCmd := btcjson.NewGetBlockCmd(blockHash, btcjson.Int(1))
 
 	// Marshal the command to the format suitable for sending to the RPC
 	// server.  Typically the client would increment the id here which is
@@ -38,7 +38,7 @@ func ExampleMarshalCmd() {
 	fmt.Printf("%s\n", marshalledBytes)
 
 	// Output:
-	// {"jsonrpc":"1.0","method":"getblock","params":["000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f",false],"id":1}
+	// {"jsonrpc":"1.0","method":"getblock","params":["000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f",1],"id":1}
 }
 
 // This example demonstrates how to unmarshal a JSON-RPC request and then
@@ -46,7 +46,7 @@ func ExampleMarshalCmd() {
 func ExampleUnmarshalCmd() {
 	// Ordinarily this would be read from the wire, but for this example,
 	// it is hard coded here for clarity.
-	data := []byte(`{"jsonrpc":"1.0","method":"getblock","params":["000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f",false],"id":1}`)
+	data := []byte(`{"jsonrpc":"1.0","method":"getblock","params":["000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f",1],"id":1}`)
 
 	// Unmarshal the raw bytes from the wire into a JSON-RPC request.
 	var request btcjson.Request
@@ -84,13 +84,11 @@ func ExampleUnmarshalCmd() {
 
 	// Display the fields in the concrete command.
 	fmt.Println("Hash:", gbCmd.Hash)
-	fmt.Println("Verbose:", *gbCmd.Verbose)
-	fmt.Println("VerboseTx:", *gbCmd.VerboseTx)
+	fmt.Println("Verbosity:", *gbCmd.Verbosity)
 
 	// Output:
 	// Hash: 000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f
-	// Verbose: false
-	// VerboseTx: false
+	// Verbosity: 0
 }
 
 // This example demonstrates how to marshal a JSON-RPC response.

rpcclient/chain.go

@@ -97,7 +97,7 @@ func (c *Client) GetBlockAsync(blockHash *chainhash.Hash) FutureGetBlockResult {
 		hash = blockHash.String()
 	}
 
-	cmd := btcjson.NewGetBlockCmd(hash, btcjson.Bool(false), nil)
+	cmd := btcjson.NewGetBlockCmd(hash, nil)
 	return c.sendCmd(cmd)
 }
 
@@ -140,8 +140,9 @@ func (c *Client) GetBlockVerboseAsync(blockHash *chainhash.Hash) FutureGetBlockV
 	if blockHash != nil {
 		hash = blockHash.String()
 	}
-
-	cmd := btcjson.NewGetBlockCmd(hash, btcjson.Bool(true), nil)
+	// From the bitcoin-cli getblock documentation:
+	// "If verbosity is 1, returns an Object with information about block ."
+	cmd := btcjson.NewGetBlockCmd(hash, btcjson.Int(1))
 	return c.sendCmd(cmd)
 }
 
@@ -154,18 +155,37 @@ func (c *Client) GetBlockVerbose(blockHash *chainhash.Hash) (*btcjson.GetBlockVe
 	return c.GetBlockVerboseAsync(blockHash).Receive()
 }
 
+type FutureGetBlockVerboseTxResult chan *response
+
+func (r FutureGetBlockVerboseTxResult) Receive() (*btcjson.GetBlockVerboseTxResult, error) {
+	res, err := receiveFuture(r)
+	if err != nil {
+		return nil, err
+	}
+
+	var blockResult btcjson.GetBlockVerboseTxResult
+	err = json.Unmarshal(res, &blockResult)
+	if err != nil {
+		return nil, err
+	}
+
+	return &blockResult, nil
+}
+
 // GetBlockVerboseTxAsync returns an instance of a type that can be used to get
 // the result of the RPC at some future time by invoking the Receive function on
 // the returned instance.
 //
 // See GetBlockVerboseTx or the blocking version and more details.
-func (c *Client) GetBlockVerboseTxAsync(blockHash *chainhash.Hash) FutureGetBlockVerboseResult {
+func (c *Client) GetBlockVerboseTxAsync(blockHash *chainhash.Hash) FutureGetBlockVerboseTxResult {
 	hash := ""
 	if blockHash != nil {
 		hash = blockHash.String()
 	}
+	// From the bitcoin-cli getblock documentation:
+	// "If verbosity is 2, returns an Object with information about block  and information about each transaction."
+	cmd := btcjson.NewGetBlockCmd(hash, btcjson.Int(2))
 
-	cmd := btcjson.NewGetBlockCmd(hash, btcjson.Bool(true), btcjson.Bool(true))
 	return c.sendCmd(cmd)
 }
 
@@ -174,7 +194,7 @@ func (c *Client) GetBlockVerboseTxAsync(blockHash *chainhash.Hash) FutureGetBloc
 //
 // See GetBlockVerbose if only transaction hashes are preferred.
 // See GetBlock to retrieve a raw block instead.
-func (c *Client) GetBlockVerboseTx(blockHash *chainhash.Hash) (*btcjson.GetBlockVerboseResult, error) {
+func (c *Client) GetBlockVerboseTx(blockHash *chainhash.Hash) (*btcjson.GetBlockVerboseTxResult, error) {
 	return c.GetBlockVerboseTxAsync(blockHash).Receive()
 }
 

rpcserver.go

@@ -1084,7 +1084,7 @@ func handleGetBlock(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (i
 
 	// When the verbose flag isn't set, simply return the serialized block
 	// as a hex-encoded string.
-	if c.Verbose != nil && !*c.Verbose {
+	if c.Verbosity != nil && *c.Verbosity == 0 {
 		return hex.EncodeToString(blkBytes), nil
 	}
 
@@ -1137,7 +1137,7 @@ func handleGetBlock(s *rpcServer, cmd interface{}, closeChan <-chan struct{}) (i
 		NextHash:      nextHashString,
 	}
 
-	if c.VerboseTx == nil || !*c.VerboseTx {
+	if *c.Verbosity == 1 {
 		transactions := blk.Transactions()
 		txNames := make([]string, len(transactions))
 		for i, tx := range transactions {