Get transaction implemented

* Added a GetTransaction to XEth
* Implemented the `eth_getTransactionByHash` RPC method

rpc/api.go

@@ -421,6 +421,14 @@ func (p *EthereumApi) WhisperMessages(id int, reply *interface{}) error {
 	return nil
 }
 
+func (p *EthereumApi) GetTransactionByHash(hash string, reply *interface{}) error {
+	tx := p.xeth().EthTransactionByHash(hash)
+	if tx != nil {
+		*reply = NewTransactionRes(tx)
+	}
+	return nil
+}
+
 func (p *EthereumApi) GetBlockByHash(blockhash string, includetx bool) (*BlockRes, error) {
 	block := p.xeth().EthBlockByHash(blockhash)
 	br := NewBlockRes(block)
@@ -594,14 +602,18 @@ func (p *EthereumApi) GetRequestReply(req *RpcRequest, reply *interface{}) error
 		}
 		*reply = v
 	case "eth_getTransactionByHash":
-		return errNotImplemented
+		// HashIndexArgs used, but only the "Hash" part we need.
+		args := new(HashIndexArgs)
+		if err := json.Unmarshal(req.Params, &args); err != nil {
+		}
+		return p.GetTransactionByHash(args.Hash, reply)
 	case "eth_getTransactionByBlockHashAndIndex":
 		args := new(HashIndexArgs)
 		if err := json.Unmarshal(req.Params, &args); err != nil {
 			return err
 		}
 
-		v, err := p.GetBlockByHash(args.BlockHash, true)
+		v, err := p.GetBlockByHash(args.Hash, true)
 		if err != nil {
 			return err
 		}
@@ -629,7 +641,7 @@ func (p *EthereumApi) GetRequestReply(req *RpcRequest, reply *interface{}) error
 			return err
 		}
 
-		v, err := p.GetBlockByHash(args.BlockHash, false)
+		v, err := p.GetBlockByHash(args.Hash, false)
 		if err != nil {
 			return err
 		}

rpc/args.go

@@ -280,7 +280,7 @@ func (args *BlockNumIndexArgs) UnmarshalJSON(b []byte) (err error) {
 }
 
 type HashIndexArgs struct {
-	BlockHash string
+	Hash  string
 	Index int64
 }
 
@@ -299,7 +299,7 @@ func (args *HashIndexArgs) UnmarshalJSON(b []byte) (err error) {
 	if !ok {
 		return errDecodeArgs
 	}
-	args.BlockHash = arg0
+	args.Hash = arg0
 
 	if len(obj) > 1 {
 		arg1, ok := obj[1].(string)

xeth/xeth.go

@@ -32,6 +32,7 @@ type Backend interface {
 	Peers() []*p2p.Peer
 	BlockDb() ethutil.Database
 	StateDb() ethutil.Database
+	ExtraDb() ethutil.Database
 	EventMux() *event.TypeMux
 	Whisper() *whisper.Whisper
 
@@ -127,6 +128,14 @@ func (self *XEth) EthBlockByHash(strHash string) *types.Block {
 	return block
 }
 
+func (self *XEth) EthTransactionByHash(hash string) *types.Transaction {
+	data, _ := self.eth.ExtraDb().Get(fromHex(hash))
+	if len(data) != 0 {
+		return types.NewTransactionFromBytes(data)
+	}
+	return nil
+}
+
 func (self *XEth) BlockByNumber(num int64) *Block {
 	if num == -1 {
 		return NewBlock(self.chainManager.CurrentBlock())
@@ -231,10 +240,6 @@ func (self *XEth) SecretToAddress(key string) string {
 	return toHex(pair.Address())
 }
 
-func (self *XEth) Execute(addr, value, gas, price, data string) (string, error) {
-	return "", nil
-}
-
 type KeyVal struct {
 	Key   string `json:"key"`
 	Value string `json:"value"`