Properly uninstall filters. Mining issue fixed #closes #365

* Added an additional tx state which is used to get the current nonce
* Refresh transient state each time a new canonical block is found
* Properly uninstall filters. Fixes a possible crash in RPC

2 files changed, 6 insertions, 7 deletions

diff --git a/rpc/packages.go b/rpc/packages.go
index b51bde7ce..571f3a300 100644
--- a/rpc/packages.go
+++ b/rpc/packages.go
@@ -126,10 +126,6 @@ func (self *EthereumApi) NewFilterString(args string, reply *interface{}) error
 		self.logMut.Lock()
 		defer self.logMut.Unlock()
 
-		if self.logs[id] == nil {
-			self.logs[id] = &logFilter{timeout: time.Now()}
-		}
-
 		self.logs[id].add(&state.StateLog{})
 	}
 	if args == "pending" {
@@ -139,6 +135,7 @@ func (self *EthereumApi) NewFilterString(args string, reply *interface{}) error
 	}
 
 	id = self.filterManager.InstallFilter(filter)
+	self.logs[id] = &logFilter{timeout: time.Now()}
 	*reply = id
 
 	return nil
@@ -377,12 +374,10 @@ func (p *EthereumApi) NewWhisperFilter(args *xeth.Options, reply *interface{}) e
 	args.Fn = func(msg xeth.WhisperMessage) {
 		p.messagesMut.Lock()
 		defer p.messagesMut.Unlock()
-		if p.messages[id] == nil {
-			p.messages[id] = &whisperFilter{timeout: time.Now()}
-		}
 		p.messages[id].add(msg) // = append(p.messages[id], msg)
 	}
 	id = p.xeth.Whisper().Watch(args)
+	p.messages[id] = &whisperFilter{timeout: time.Now()}
 	*reply = id
 	return nil
 }
@@ -623,12 +618,14 @@ done:
 			self.messagesMut.Lock()
 			for id, filter := range self.logs {
 				if time.Since(filter.timeout) > 20*time.Second {
+					self.filterManager.UninstallFilter(id)
 					delete(self.logs, id)
 				}
 			}
 
 			for id, filter := range self.messages {
 				if time.Since(filter.timeout) > 20*time.Second {
+					self.xeth.Whisper().Unwatch(id)
 					delete(self.messages, id)
 				}
 			}
diff --git a/rpc/util.go b/rpc/util.go
index 1939b3474..00a418783 100644
--- a/rpc/util.go
+++ b/rpc/util.go
@@ -108,6 +108,7 @@ func toLogs(logs state.Logs) (ls []Log) {
 type whisperFilter struct {
 	messages []xeth.WhisperMessage
 	timeout  time.Time
+	id       int
 }
 
 func (w *whisperFilter) add(msgs ...xeth.WhisperMessage) {
@@ -123,6 +124,7 @@ func (w *whisperFilter) get() []xeth.WhisperMessage {
 type logFilter struct {
 	logs    state.Logs
 	timeout time.Time
+	id      int
 }
 
 func (l *logFilter) add(logs ...state.Log) {