core: modify interface (#194)

* Add a new method to notify full node about round cutting.
* Modify interface to return error when preparing block

1 files changed, 3 insertions, 2 deletions

diff --git a/core/nodeset-cache_test.go b/core/nodeset-cache_test.go
index 6324421..73f0dee 100644
--- a/core/nodeset-cache_test.go
+++ b/core/nodeset-cache_test.go
@@ -40,8 +40,9 @@ func (g *testGov) Configuration(round uint64) (cfg *types.Config) {
 		NumChains:     4,
 	}
 }
-func (g *testGov) CRS(round uint64) (b common.Hash) { return g.crs }
-func (g *testGov) ProposeCRS([]byte)                {}
+func (g *testGov) CRS(round uint64) (b common.Hash)       { return g.crs }
+func (g *testGov) ProposeCRS([]byte)                      {}
+func (g *testGov) NotifyRoundHeight(round, height uint64) {}
 func (g *testGov) NodeSet(round uint64) []crypto.PublicKey {
 	// Randomly generating keys, and check them for verification.
 	g.curKeys = []crypto.PublicKey{}