From 1c506268a5385adce7885b7e950707bf9ffd5084 Mon Sep 17 00:00:00 2001
From: Mission Liao <mission.liao@dexon.org>
Date: Tue, 18 Dec 2018 10:02:30 +0800
Subject: vendor: sync to latest core (#91)

- Implement new methods in db to cache DKG
   private key.
- Implement new methods in db to cache compaction
   chain tip.
---
 dex/db/db.go | 107 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 107 insertions(+)
 create mode 100644 dex/db/db.go

(limited to 'dex/db/db.go')

diff --git a/dex/db/db.go b/dex/db/db.go
new file mode 100644
index 000000000..d51c2df54
--- /dev/null
+++ b/dex/db/db.go
@@ -0,0 +1,107 @@
+// Copyright 2018 The dexon-consensus Authors
+// This file is part of the dexon-consensus library.
+//
+// The dexon-consensus 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 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 library. If not, see
+// <http://www.gnu.org/licenses/>.
+
+package db
+
+import (
+	coreCommon "github.com/dexon-foundation/dexon-consensus/common"
+	coreDKG "github.com/dexon-foundation/dexon-consensus/core/crypto/dkg"
+	coreDb "github.com/dexon-foundation/dexon-consensus/core/db"
+	coreTypes "github.com/dexon-foundation/dexon-consensus/core/types"
+
+	"github.com/dexon-foundation/dexon/common"
+	"github.com/dexon-foundation/dexon/core/rawdb"
+	"github.com/dexon-foundation/dexon/ethdb"
+)
+
+// DB implement dexon-consensus BlockDatabase interface.
+type DB struct {
+	db ethdb.Database
+}
+
+func NewDatabase(db ethdb.Database) *DB {
+	return &DB{db}
+}
+
+func (d *DB) HasBlock(hash coreCommon.Hash) bool {
+	return rawdb.HasCoreBlock(d.db, common.Hash(hash))
+}
+
+func (d *DB) GetBlock(hash coreCommon.Hash) (coreTypes.Block, error) {
+	block := rawdb.ReadCoreBlock(d.db, common.Hash(hash))
+	if block == nil {
+		return coreTypes.Block{}, coreDb.ErrBlockDoesNotExist
+	}
+	return *block, nil
+}
+
+func (d *DB) GetAllBlocks() (coreDb.BlockIterator, error) {
+	return nil, coreDb.ErrNotImplemented
+}
+
+func (d *DB) UpdateBlock(block coreTypes.Block) error {
+	if !d.HasBlock(block.Hash) {
+		return coreDb.ErrBlockDoesNotExist
+	}
+	rawdb.WriteCoreBlock(d.db, common.Hash(block.Hash), &block)
+	return nil
+}
+
+func (d *DB) PutBlock(block coreTypes.Block) error {
+	if d.HasBlock(block.Hash) {
+		return coreDb.ErrBlockExists
+	}
+	rawdb.WriteCoreBlock(d.db, common.Hash(block.Hash), &block)
+	return nil
+}
+
+func (d *DB) HasDKGPrivateKey(round uint64) (bool, error) {
+	return rawdb.HasCoreDKGPrivateKey(d.db, round)
+}
+
+func (d *DB) GetDKGPrivateKey(round uint64) (coreDKG.PrivateKey, error) {
+	key := rawdb.ReadCoreDKGPrivateKey(d.db, round)
+	if key == nil {
+		return coreDKG.PrivateKey{}, coreDb.ErrDKGPrivateKeyDoesNotExist
+	}
+	return *key, nil
+}
+
+func (d *DB) PutDKGPrivateKey(round uint64, key coreDKG.PrivateKey) error {
+	has, err := d.HasDKGPrivateKey(round)
+	if err != nil {
+		return err
+	}
+	if has {
+		return coreDb.ErrDKGPrivateKeyExists
+	}
+	return rawdb.WriteCoreDKGPrivateKey(d.db, round, &key)
+}
+
+func (d *DB) PutCompactionChainTipInfo(hash coreCommon.Hash, height uint64) error {
+	_, currentHeight := d.GetCompactionChainTipInfo()
+	if height <= currentHeight {
+		return coreDb.ErrInvalidCompactionChainTipHeight
+	}
+	return rawdb.WriteCoreCompactionChainTip(d.db, hash, height)
+}
+
+func (d *DB) GetCompactionChainTipInfo() (hash coreCommon.Hash, height uint64) {
+	return rawdb.ReadCoreCompactionChainTip(d.db)
+}
+
+func (d *DB) Close() error { return nil }
-- 
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