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, 6 insertions, 0 deletions

diff --git a/core/crypto/ecdsa/ecdsa.go b/core/crypto/ecdsa/ecdsa.go
index 5f98395..0196c47 100644
--- a/core/crypto/ecdsa/ecdsa.go
+++ b/core/crypto/ecdsa/ecdsa.go
@@ -64,6 +64,12 @@ func newPublicKey(prvKey *ecdsa.PrivateKey) *publicKey {
 	}
 }
 
+// NewPublicKeyFromByteSlice constructs an eth.publicKey instance from
+// a byte slice.
+func NewPublicKeyFromByteSlice(b []byte) crypto.PublicKey {
+	return publicKey{publicKey: b}
+}
+
 // decompressPubkey parses a public key in the 33-byte compressed format.
 func decompressPubkey(pubkey []byte) (publicKey, error) {
 	_, err := ethcrypto.DecompressPubkey(pubkey)