1 files changed, 53 insertions, 0 deletions
diff --git a/core/types/witness.go b/core/types/witness.go
new file mode 100644
index 0000000..1e432f6
--- /dev/null
+++ b/core/types/witness.go
@@ -0,0 +1,53 @@
+// Copyright 2018 The dexon-consensus-core Authors
+// This file is part of the dexon-consensus-core library.
+//
+// The dexon-consensus-core library is free software: you can redistribute it
+// and/or modify it under the terms of the GNU Lesser General Public License as
+// published by the Free Software Foundation, either version 3 of the License,
+// or (at your option) any later version.
+//
+// The dexon-consensus-core library is distributed in the hope that it will be
+// useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
+// General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the dexon-consensus-core library. If not, see
+// <http://www.gnu.org/licenses/>.
+
+// TODO(jimmy-dexon): remove comments of WitnessAck before open source.
+
+package types
+
+import (
+	"time"
+
+	"github.com/dexon-foundation/dexon-consensus-core/common"
+	"github.com/dexon-foundation/dexon-consensus-core/crypto"
+)
+
+// WitnessAck represents the acking to the compaction chain.
+type WitnessAck struct {
+	ProposerID       ValidatorID `json:"proposer_id"`
+	WitnessBlockHash common.Hash `json:"witness_block_hash"`
+	Hash             common.Hash `json:"hash"`
+	// WitnessSignature is the signature of the hash value of BlockWitness.
+	Signature crypto.Signature `json:"signature"`
+}
+
+// Clone returns a deep copy of a WitnessAck.
+func (a *WitnessAck) Clone() *WitnessAck {
+	return &WitnessAck{
+		ProposerID:       a.ProposerID,
+		WitnessBlockHash: a.WitnessBlockHash,
+		Hash:             a.Hash,
+		Signature:        a.Signature,
+	}
+}
+
+// Witness represents the consensus information on the compaction chain.
+type Witness struct {
+	ParentHash common.Hash `json:"parent_hash"`
+	Timestamp  time.Time   `json:"timestamp"`
+	Height     uint64      `json:"height"`
+}