core: hide types.NodeID from full node. (#147)

* Refine core.Governance interface
- Remove types.NodeID from interface declaration.
- All parameter should be round based.
* Add core.NodeSetCache
* Agreement accepts map of nodeID directly.
* test.Transport.Peers method return public keys.

1 files changed, 14 insertions, 0 deletions

diff --git a/core/test/utils.go b/core/test/utils.go
index 887ef14..2fc21ce 100644
--- a/core/test/utils.go
+++ b/core/test/utils.go
@@ -24,6 +24,8 @@ import (
 	"time"
 
 	"github.com/dexon-foundation/dexon-consensus-core/common"
+	"github.com/dexon-foundation/dexon-consensus-core/core/crypto"
+	"github.com/dexon-foundation/dexon-consensus-core/core/crypto/ecdsa"
 	"github.com/dexon-foundation/dexon-consensus-core/core/types"
 )
 
@@ -43,6 +45,18 @@ func GenerateRandomNodeIDs(nodeCount int) (nIDs types.NodeIDs) {
 	return
 }
 
+// GenerateRandomPrivateKeys generate a set of private keys.
+func GenerateRandomPrivateKeys(nodeCount int) (prvKeys []crypto.PrivateKey) {
+	for i := 0; i < nodeCount; i++ {
+		prvKey, err := ecdsa.NewPrivateKey()
+		if err != nil {
+			panic(err)
+		}
+		prvKeys = append(prvKeys, prvKey)
+	}
+	return
+}
+
 // CalcLatencyStatistics calculates average and deviation from a slice
 // of latencies.
 func CalcLatencyStatistics(latencies []time.Duration) (avg, dev time.Duration) {