New API call for signatures.

rpc/api.go

@@ -158,6 +158,17 @@ func (api *EthereumApi) GetRequestReply(req *RpcRequest, reply *interface{}) err
 		v := api.xethAtStateNum(args.BlockNumber).CodeAtBytes(args.Address)
 		*reply = newHexData(v)
 
+	case "eth_sign":
+		args := new(NewSigArgs)
+		if err := json.Unmarshal(req.Params, &args); err != nil {
+			return err
+		}
+		v, err := api.xeth.Sign(args.From, args.Data)
+		if err != nil {
+			return err
+		}
+		*reply = v
+
 	case "eth_sendTransaction", "eth_transact":
 		args := new(NewTxArgs)
 		if err := json.Unmarshal(req.Params, &args); err != nil {

rpc/args.go

@@ -166,6 +166,11 @@ type NewTxArgs struct {
 	BlockNumber int64
 }
 
+type NewSigArgs struct {
+	From string
+	Data string
+}
+
 func (args *NewTxArgs) UnmarshalJSON(b []byte) (err error) {
 	var obj []json.RawMessage
 	var ext struct {