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authorobscuren <geffobscura@gmail.com>2015-05-12 20:14:08 +0800
committerobscuren <geffobscura@gmail.com>2015-05-12 20:21:43 +0800
commit66de3f0aa849849c5cf5ad84265f3f3ce8ca5282 (patch)
treebef9ea4c2ff86fd1be3285812dcb9c02d19cde23
parent96d4a7d0870ee019098cf1991b00f6959843e6fd (diff)
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xeth, rpc: implement eth_estimateGas. Closes #930
-rw-r--r--cmd/mist/ui_lib.go2
-rw-r--r--rpc/api.go25
-rw-r--r--xeth/xeth.go6
3 files changed, 26 insertions, 7 deletions
diff --git a/cmd/mist/ui_lib.go b/cmd/mist/ui_lib.go
index 4653e0980..0958294c3 100644
--- a/cmd/mist/ui_lib.go
+++ b/cmd/mist/ui_lib.go
@@ -127,7 +127,7 @@ func (self *UiLib) Transact(params map[string]interface{}) (string, error) {
)
}
-func (self *UiLib) Call(params map[string]interface{}) (string, error) {
+func (self *UiLib) Call(params map[string]interface{}) (string, string, error) {
object := mapToTxParams(params)
return self.XEth.Call(
diff --git a/rpc/api.go b/rpc/api.go
index d53a9917d..774d26ea2 100644
--- a/rpc/api.go
+++ b/rpc/api.go
@@ -186,16 +186,24 @@ func (api *EthereumApi) GetRequestReply(req *RpcRequest, reply *interface{}) err
return err
}
*reply = v
- case "eth_call":
- args := new(CallArgs)
- if err := json.Unmarshal(req.Params, &args); err != nil {
+ case "eth_estimateGas":
+ _, gas, err := api.doCall(req.Params)
+ if err != nil {
return err
}
- v, err := api.xethAtStateNum(args.BlockNumber).Call(args.From, args.To, args.Value.String(), args.Gas.String(), args.GasPrice.String(), args.Data)
+ // TODO unwrap the parent method's ToHex call
+ if len(gas) == 0 {
+ *reply = newHexData([]byte{})
+ } else {
+ *reply = newHexData(gas)
+ }
+ case "eth_call":
+ v, _, err := api.doCall(req.Params)
if err != nil {
return err
}
+
// TODO unwrap the parent method's ToHex call
if v == "0x0" {
*reply = newHexData([]byte{})
@@ -571,3 +579,12 @@ func (api *EthereumApi) GetRequestReply(req *RpcRequest, reply *interface{}) err
glog.V(logger.Detail).Infof("Reply: %T %s\n", reply, reply)
return nil
}
+
+func (api *EthereumApi) doCall(params json.RawMessage) (string, string, error) {
+ args := new(CallArgs)
+ if err := json.Unmarshal(params, &args); err != nil {
+ return "", "", err
+ }
+
+ return api.xethAtStateNum(args.BlockNumber).Call(args.From, args.To, args.Value.String(), args.Gas.String(), args.GasPrice.String(), args.Data)
+}
diff --git a/xeth/xeth.go b/xeth/xeth.go
index bf5844770..1ddd4c6e4 100644
--- a/xeth/xeth.go
+++ b/xeth/xeth.go
@@ -773,7 +773,7 @@ func (self *XEth) PushTx(encodedTx string) (string, error) {
return tx.Hash().Hex(), nil
}
-func (self *XEth) Call(fromStr, toStr, valueStr, gasStr, gasPriceStr, dataStr string) (string, error) {
+func (self *XEth) Call(fromStr, toStr, valueStr, gasStr, gasPriceStr, dataStr string) (string, string, error) {
statedb := self.State().State() //self.eth.ChainManager().TransState()
var from *state.StateObject
if len(fromStr) == 0 {
@@ -807,8 +807,10 @@ func (self *XEth) Call(fromStr, toStr, valueStr, gasStr, gasPriceStr, dataStr st
block := self.CurrentBlock()
vmenv := core.NewEnv(statedb, self.backend.ChainManager(), msg, block)
+ initialGas := new(big.Int).Set(msg.gas)
res, err := vmenv.Call(msg.from, msg.to, msg.data, msg.gas, msg.gasPrice, msg.value)
- return common.ToHex(res), err
+
+ return common.ToHex(res), initialGas.Sub(initialGas, msg.gas).String(), err
}
func (self *XEth) ConfirmTransaction(tx string) bool {