Move and rename BlockchainCodec, BlockchainCodecRequest.

These are not specifically "blockchain", rather they are
specific to how gorilla/rpc works.

server/jsonrpc_blockchain.go

@@ -10,9 +10,7 @@ import (
 	"errors"
 	"fmt"
 	"net/http"
-	"strings"
 
-	"github.com/gorilla/rpc"
 	"github.com/lbryio/herald.go/db"
 	"github.com/lbryio/herald.go/internal"
 	"github.com/lbryio/lbcd/chaincfg"
@@ -23,42 +21,6 @@ import (
 	"golang.org/x/exp/constraints"
 )
 
-type BlockchainCodec struct {
-	rpc.Codec
-}
-
-func (c *BlockchainCodec) NewRequest(r *http.Request) rpc.CodecRequest {
-	return &BlockchainCodecRequest{c.Codec.NewRequest(r)}
-}
-
-// BlockchainCodecRequest provides ability to rewrite the incoming
-// request "method" field. For example:
-//     blockchain.block.get_header -> blockchain_block.Get_header
-//     blockchain.address.listunspent -> blockchain_address.Listunspent
-// This makes the "method" string compatible with Gorilla/RPC
-// requirements.
-type BlockchainCodecRequest struct {
-	rpc.CodecRequest
-}
-
-func (cr *BlockchainCodecRequest) Method() (string, error) {
-	rawMethod, err := cr.CodecRequest.Method()
-	if err != nil {
-		return rawMethod, err
-	}
-	parts := strings.Split(rawMethod, ".")
-	if len(parts) < 2 {
-		return rawMethod, fmt.Errorf("blockchain rpc: service/method ill-formed: %q", rawMethod)
-	}
-	service := strings.Join(parts[0:len(parts)-1], "_")
-	method := parts[len(parts)-1]
-	if len(method) < 1 {
-		return rawMethod, fmt.Errorf("blockchain rpc: method ill-formed: %q", method)
-	}
-	method = strings.ToUpper(string(method[0])) + string(method[1:])
-	return service + "." + method, err
-}
-
 // BlockchainService methods handle "blockchain.block.*" RPCs
 type BlockchainService struct {
 	DB    *db.ReadOnlyDBColumnFamily

server/jsonrpc_service.go

@@ -1,11 +1,13 @@
 package server
 
 import (
+	"fmt"
 	"net/http"
+	"strings"
 
-	"github.com/gorilla/mux"
+	gorilla_mux "github.com/gorilla/mux"
-	"github.com/gorilla/rpc"
+	gorilla_rpc "github.com/gorilla/rpc"
-	"github.com/gorilla/rpc/json"
+	gorilla_json "github.com/gorilla/rpc/json"
 	"github.com/lbryio/herald.go/db"
 	pb "github.com/lbryio/herald.go/protobuf/go"
 	log "github.com/sirupsen/logrus"
@@ -31,13 +33,49 @@ func (t *ClaimtrieService) Resolve(r *http.Request, args *ResolveData, result **
 	return err
 }
 
+type gorillaRpcCodec struct {
+	gorilla_rpc.Codec
+}
+
+func (c *gorillaRpcCodec) NewRequest(r *http.Request) gorilla_rpc.CodecRequest {
+	return &gorillaRpcCodecRequest{c.Codec.NewRequest(r)}
+}
+
+// gorillaRpcCodecRequest provides ability to rewrite the incoming
+// request "method" field. For example:
+//     blockchain.block.get_header -> blockchain_block.Get_header
+//     blockchain.address.listunspent -> blockchain_address.Listunspent
+// This makes the "method" string compatible with Gorilla/RPC
+// requirements.
+type gorillaRpcCodecRequest struct {
+	gorilla_rpc.CodecRequest
+}
+
+func (cr *gorillaRpcCodecRequest) Method() (string, error) {
+	rawMethod, err := cr.CodecRequest.Method()
+	if err != nil {
+		return rawMethod, err
+	}
+	parts := strings.Split(rawMethod, ".")
+	if len(parts) < 2 {
+		return rawMethod, fmt.Errorf("blockchain rpc: service/method ill-formed: %q", rawMethod)
+	}
+	service := strings.Join(parts[0:len(parts)-1], "_")
+	method := parts[len(parts)-1]
+	if len(method) < 1 {
+		return rawMethod, fmt.Errorf("blockchain rpc: method ill-formed: %q", method)
+	}
+	method = strings.ToUpper(string(method[0])) + string(method[1:])
+	return service + "." + method, err
+}
+
 // StartJsonRPC starts the json rpc server and registers the endpoints.
 func (s *Server) StartJsonRPC() error {
 	port := ":" + s.Args.JSONRPCPort
 
-	s1 := rpc.NewServer() // Create a new RPC server
+	s1 := gorilla_rpc.NewServer() // Create a new RPC server
 	// Register the type of data requested as JSON, with custom codec.
-	s1.RegisterCodec(&BlockchainCodec{json.NewCodec()}, "application/json")
+	s1.RegisterCodec(&gorillaRpcCodec{gorilla_json.NewCodec()}, "application/json")
 
 	// Register "blockchain.claimtrie.*"" handlers.
 	claimtrieSvc := &ClaimtrieService{s.DB}
@@ -61,7 +99,7 @@ func (s *Server) StartJsonRPC() error {
 		log.Errorf("RegisterService: %v\n", err)
 	}
 
-	r := mux.NewRouter()
+	r := gorilla_mux.NewRouter()
 	r.Handle("/rpc", s1)
 	log.Fatal(http.ListenAndServe(port, r))