added txpool API

rpc/api/txpool.go

@@ -0,0 +1,67 @@
+package api
+
+import (
+	"github.com/ethereum/go-ethereum/eth"
+	"github.com/ethereum/go-ethereum/rpc/codec"
+	"github.com/ethereum/go-ethereum/rpc/shared"
+	"github.com/ethereum/go-ethereum/xeth"
+)
+
+var (
+	// mapping between methods and handlers
+	txpoolMapping = map[string]txpoolhandler{
+		"txpool_status": (*txPoolApi).Status,
+	}
+)
+
+// net callback handler
+type txpoolhandler func(*txPoolApi, *shared.Request) (interface{}, error)
+
+// txpool api provider
+type txPoolApi struct {
+	xeth     *xeth.XEth
+	ethereum *eth.Ethereum
+	methods  map[string]txpoolhandler
+	codec    codec.ApiCoder
+}
+
+// create a new txpool api instance
+func NewTxPoolApi(xeth *xeth.XEth, eth *eth.Ethereum, coder codec.Codec) *txPoolApi {
+	return &txPoolApi{
+		xeth:     xeth,
+		ethereum: eth,
+		methods:  txpoolMapping,
+		codec:    coder.New(nil),
+	}
+}
+
+// collection with supported methods
+func (self *txPoolApi) Methods() []string {
+	methods := make([]string, len(self.methods))
+	i := 0
+	for k := range self.methods {
+		methods[i] = k
+		i++
+	}
+	return methods
+}
+
+// Execute given request
+func (self *txPoolApi) Execute(req *shared.Request) (interface{}, error) {
+	if callback, ok := self.methods[req.Method]; ok {
+		return callback(self, req)
+	}
+
+	return nil, shared.NewNotImplementedError(req.Method)
+}
+
+func (self *txPoolApi) Name() string {
+	return txPoolApiName
+}
+
+func (self *txPoolApi) Status(req *shared.Request) (interface{}, error) {
+	return map[string]int{
+		"pending": self.ethereum.TxPool().GetTransactions().Len(),
+		"queued":  self.ethereum.TxPool().GetQueuedTransactions().Len(),
+	}, nil
+}