Revert "Revert "Added the EVM as a plugin""

1 files changed, 66 insertions, 0 deletions

diff --git a/plugin/evm/database.go b/plugin/evm/database.go
new file mode 100644
index 0000000..de592e1
--- /dev/null
+++ b/plugin/evm/database.go
@@ -0,0 +1,66 @@
+// (c) 2019-2020, Ava Labs, Inc. All rights reserved.
+// See the file LICENSE for licensing terms.
+
+package evm
+
+import (
+	"errors"
+
+	"github.com/ava-labs/go-ethereum/ethdb"
+
+	"github.com/ava-labs/gecko/database"
+)
+
+var (
+	errOpNotSupported = errors.New("this operation is not supported")
+)
+
+// Database implements ethdb.Database
+type Database struct{ database.Database }
+
+// HasAncient returns an error as we don't have a backing chain freezer.
+func (db Database) HasAncient(kind string, number uint64) (bool, error) {
+	return false, errOpNotSupported
+}
+
+// Ancient returns an error as we don't have a backing chain freezer.
+func (db Database) Ancient(kind string, number uint64) ([]byte, error) { return nil, errOpNotSupported }
+
+// Ancients returns an error as we don't have a backing chain freezer.
+func (db Database) Ancients() (uint64, error) { return 0, errOpNotSupported }
+
+// AncientSize returns an error as we don't have a backing chain freezer.
+func (db Database) AncientSize(kind string) (uint64, error) { return 0, errOpNotSupported }
+
+// AppendAncient returns an error as we don't have a backing chain freezer.
+func (db Database) AppendAncient(number uint64, hash, header, body, receipts, td []byte) error {
+	return errOpNotSupported
+}
+
+// TruncateAncients returns an error as we don't have a backing chain freezer.
+func (db Database) TruncateAncients(items uint64) error { return errOpNotSupported }
+
+// Sync returns an error as we don't have a backing chain freezer.
+func (db Database) Sync() error { return errOpNotSupported }
+
+// NewBatch implements ethdb.Database
+func (db Database) NewBatch() ethdb.Batch { return Batch{db.Database.NewBatch()} }
+
+// NewIterator implements ethdb.Database
+func (db Database) NewIterator() ethdb.Iterator { return db.Database.NewIterator() }
+
+// NewIteratorWithPrefix implements ethdb.Database
+func (db Database) NewIteratorWithPrefix(prefix []byte) ethdb.Iterator {
+	return db.NewIteratorWithPrefix(prefix)
+}
+
+// NewIteratorWithStart implements ethdb.Database
+func (db Database) NewIteratorWithStart(start []byte) ethdb.Iterator {
+	return db.NewIteratorWithStart(start)
+}
+
+// Batch implements ethdb.Batch
+type Batch struct{ database.Batch }
+
+// Replay implements ethdb.Batch
+func (batch Batch) Replay(w ethdb.KeyValueWriter) error { return batch.Batch.Replay(w) }