misc: panic not ready (#374)

* Panic when config/crs not ready

For those calls to Governace.Configuration
and Governance.CRS without checking
returns, replace those calls with these newly
added helpers:
- utils.GetConfigurationWithPanic
- utils.GetCRSWithPanic

They would check returns, and panic directly
if not ready yet.

* Fix a bug that config is not ready
   when syncing

1 files changed, 2 insertions, 1 deletions

diff --git a/core/dkg-tsig-protocol.go b/core/dkg-tsig-protocol.go
index 8e03cbb..b120f81 100644
--- a/core/dkg-tsig-protocol.go
+++ b/core/dkg-tsig-protocol.go
@@ -26,6 +26,7 @@ import (
 	"github.com/dexon-foundation/dexon-consensus/core/crypto/dkg"
 	"github.com/dexon-foundation/dexon-consensus/core/types"
 	typesDKG "github.com/dexon-foundation/dexon-consensus/core/types/dkg"
+	"github.com/dexon-foundation/dexon-consensus/core/utils"
 )
 
 // Errors for dkg module.
@@ -491,7 +492,7 @@ func (tc *TSigVerifierCache) Update(round uint64) (bool, error) {
 	gpk, err := NewDKGGroupPublicKey(round,
 		tc.intf.DKGMasterPublicKeys(round),
 		tc.intf.DKGComplaints(round),
-		int(tc.intf.Configuration(round).DKGSetSize/3)+1)
+		int(utils.GetConfigWithPanic(tc.intf, round, nil).DKGSetSize/3)+1)
 	if err != nil {
 		return false, err
 	}