Reimplemented message filters for rpc calls

rpc/message.go

@@ -21,6 +21,8 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+
+	"github.com/ethereum/go-ethereum/state"
 )
 
 const (
@@ -184,3 +186,56 @@ func (req *RpcRequest) ToGetCodeAtArgs() (*GetCodeAtArgs, error) {
 	rpclogger.DebugDetailf("%T %v", args, args)
 	return args, nil
 }
+
+func (req *RpcRequest) ToFilterArgs() (*FilterOptions, error) {
+	if len(req.Params) < 1 {
+		return nil, NewErrorResponse(ErrorArguments)
+	}
+
+	args := new(FilterOptions)
+	r := bytes.NewReader(req.Params[0])
+	err := json.NewDecoder(r).Decode(args)
+	if err != nil {
+		return nil, NewErrorResponse(ErrorDecodeArgs)
+	}
+	rpclogger.DebugDetailf("%T %v", args, args)
+	return args, nil
+}
+
+func (req *RpcRequest) ToFilterChangedArgs() (int, error) {
+	if len(req.Params) < 1 {
+		return 0, NewErrorResponse(ErrorArguments)
+	}
+
+	var id int
+	r := bytes.NewReader(req.Params[0])
+	err := json.NewDecoder(r).Decode(&id)
+	if err != nil {
+		return 0, NewErrorResponse(ErrorDecodeArgs)
+	}
+	rpclogger.DebugDetailf("%T %v", id, id)
+	return id, nil
+}
+
+type Log struct {
+	Address string   `json:"address"`
+	Topics  []string `json:"topics"`
+	Data    string   `json:"data"`
+}
+
+func toLogs(logs state.Logs) (ls []Log) {
+	ls = make([]Log, len(logs))
+
+	for i, log := range logs {
+		var l Log
+		l.Topics = make([]string, len(log.Topics()))
+		l.Address = toHex(log.Address())
+		l.Data = toHex(log.Data())
+		for j, topic := range log.Topics() {
+			l.Topics[j] = toHex(topic)
+		}
+		ls[i] = l
+	}
+
+	return
+}