From 9ce5229ddfccfccf1215e44477b665de031e4e1e Mon Sep 17 00:00:00 2001
From: Taylor Gerring <taylor.gerring@gmail.com>
Date: Tue, 10 Mar 2015 22:25:07 -0500
Subject: Get transaction via block & index

---
 rpc/api.go  | 27 +++++++++++++++++++++++++++
 rpc/args.go | 10 ++++++++++
 2 files changed, 37 insertions(+)

diff --git a/rpc/api.go b/rpc/api.go
index a8c365b22..510939cd7 100644
--- a/rpc/api.go
+++ b/rpc/api.go
@@ -593,8 +593,35 @@ func (p *EthereumApi) GetRequestReply(req *RpcRequest, reply *interface{}) error
 		}
 		*reply = v
 	case "eth_getTransactionByHash":
+		return errNotImplemented
 	case "eth_getTransactionByBlockHashAndIndex":
+		args := new(HashIndexArgs)
+		if err := json.Unmarshal(req.Params, &args); err != nil {
+			return err
+		}
+
+		v, err := p.GetBlockByHash(args.BlockHash, true)
+		if err != nil {
+			return err
+		}
+		if args.TxIndex > int64(len(v.Transactions)) || args.TxIndex < 0 {
+			return NewErrorWithMessage(errDecodeArgs, "Transaction index does not exist")
+		}
+		*reply = v.Transactions[args.TxIndex]
 	case "eth_getTransactionByBlockNumberAndIndex":
+		args := new(BlockNumIndexArgs)
+		if err := json.Unmarshal(req.Params, &args); err != nil {
+			return err
+		}
+
+		v, err := p.GetBlockByNumber(args.BlockNumber, true)
+		if err != nil {
+			return err
+		}
+		if args.TxIndex > int64(len(v.Transactions)) || args.TxIndex < 0 {
+			return NewErrorWithMessage(errDecodeArgs, "Transaction index does not exist")
+		}
+		*reply = v.Transactions[args.TxIndex]
 	case "eth_getUncleByBlockHashAndIndex":
 	case "eth_getUncleByBlockNumberAndIndex":
 		return errNotImplemented
diff --git a/rpc/args.go b/rpc/args.go
index ab711e78f..2f361526a 100644
--- a/rpc/args.go
+++ b/rpc/args.go
@@ -217,6 +217,16 @@ func (args *GetDataArgs) requirements() error {
 	return nil
 }
 
+type BlockNumIndexArgs struct {
+	BlockNumber int64
+	TxIndex     int64
+}
+
+type HashIndexArgs struct {
+	BlockHash string
+	TxIndex   int64
+}
+
 type Sha3Args struct {
 	Data string
 }
-- 
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