5 files changed, 207 insertions, 0 deletions
diff --git a/ethdb/.gitignore b/ethdb/.gitignore
new file mode 100644
index 000000000..f725d58d1
--- /dev/null
+++ b/ethdb/.gitignore
@@ -0,0 +1,12 @@
+# See http://help.github.com/ignore-files/ for more about ignoring files.
+#
+# If you find yourself ignoring temporary files generated by your text editor
+# or operating system, you probably want to add a global ignore instead:
+#   git config --global core.excludesfile ~/.gitignore_global
+
+/tmp
+*/**/*un~
+*un~
+.DS_Store
+*/**/.DS_Store
+
diff --git a/ethdb/README.md b/ethdb/README.md
new file mode 100644
index 000000000..5bed8eedc
--- /dev/null
+++ b/ethdb/README.md
@@ -0,0 +1,11 @@
+# ethdb
+
+The ethdb package contains the ethereum database interfaces
+
+# Installation
+
+`go get github.com/ethereum/ethdb-go`
+
+# Usage
+
+Todo :-)
diff --git a/ethdb/database.go b/ethdb/database.go
new file mode 100644
index 000000000..19aa83466
--- /dev/null
+++ b/ethdb/database.go
@@ -0,0 +1,89 @@
+package ethdb
+
+import (
+	"fmt"
+	"path"
+
+	"github.com/ethereum/go-ethereum/compression/rle"
+	"github.com/ethereum/go-ethereum/ethutil"
+	"github.com/syndtr/goleveldb/leveldb"
+	"github.com/syndtr/goleveldb/leveldb/iterator"
+)
+
+type LDBDatabase struct {
+	db   *leveldb.DB
+	comp bool
+}
+
+func NewLDBDatabase(name string) (*LDBDatabase, error) {
+	dbPath := path.Join(ethutil.Config.ExecPath, name)
+
+	// Open the db
+	db, err := leveldb.OpenFile(dbPath, nil)
+	if err != nil {
+		return nil, err
+	}
+
+	database := &LDBDatabase{db: db, comp: true}
+
+	return database, nil
+}
+
+func (self *LDBDatabase) Put(key []byte, value []byte) {
+	if self.comp {
+		value = rle.Compress(value)
+	}
+
+	err := self.db.Put(key, value, nil)
+	if err != nil {
+		fmt.Println("Error put", err)
+	}
+}
+
+func (self *LDBDatabase) Get(key []byte) ([]byte, error) {
+	dat, err := self.db.Get(key, nil)
+	if err != nil {
+		return nil, err
+	}
+
+	if self.comp {
+		return rle.Decompress(dat)
+	}
+
+	return dat, nil
+}
+
+func (self *LDBDatabase) Delete(key []byte) error {
+	return self.db.Delete(key, nil)
+}
+
+func (self *LDBDatabase) LastKnownTD() []byte {
+	data, _ := self.Get([]byte("LTD"))
+
+	if len(data) == 0 {
+		data = []byte{0x0}
+	}
+
+	return data
+}
+
+func (self *LDBDatabase) NewIterator() iterator.Iterator {
+	return self.db.NewIterator(nil, nil)
+}
+
+func (self *LDBDatabase) Close() {
+	// Close the leveldb database
+	self.db.Close()
+}
+
+func (self *LDBDatabase) Print() {
+	iter := self.db.NewIterator(nil, nil)
+	for iter.Next() {
+		key := iter.Key()
+		value := iter.Value()
+
+		fmt.Printf("%x(%d): ", key, len(key))
+		node := ethutil.NewValueFromBytes(value)
+		fmt.Printf("%v\n", node)
+	}
+}
diff --git a/ethdb/database_test.go b/ethdb/database_test.go
new file mode 100644
index 000000000..2cbaf58e0
--- /dev/null
+++ b/ethdb/database_test.go
@@ -0,0 +1,28 @@
+package ethdb
+
+/*
+import (
+	"bytes"
+	"testing"
+)
+
+func TestCompression(t *testing.T) {
+	ethutil.ReadConfig("", "/tmp", "")
+
+	db, err := NewLDBDatabase("testdb")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	in := make([]byte, 10)
+	db.Put([]byte("test1"), in)
+	out, err := db.Get([]byte("test1"))
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if bytes.Compare(out, in) != 0 {
+		t.Error("put get", in, out)
+	}
+}
+*/
diff --git a/ethdb/memory_database.go b/ethdb/memory_database.go
new file mode 100644
index 000000000..48aa830e7
--- /dev/null
+++ b/ethdb/memory_database.go
@@ -0,0 +1,67 @@
+package ethdb
+
+import (
+	"fmt"
+
+	"github.com/ethereum/go-ethereum/ethutil"
+)
+
+/*
+ * This is a test memory database. Do not use for any production it does not get persisted
+ */
+type MemDatabase struct {
+	db map[string][]byte
+}
+
+func NewMemDatabase() (*MemDatabase, error) {
+	db := &MemDatabase{db: make(map[string][]byte)}
+
+	return db, nil
+}
+
+func (db *MemDatabase) Put(key []byte, value []byte) {
+	db.db[string(key)] = value
+}
+
+func (db *MemDatabase) Set(key []byte, value []byte) {
+	db.Put(key, value)
+}
+
+func (db *MemDatabase) Get(key []byte) ([]byte, error) {
+	return db.db[string(key)], nil
+}
+
+/*
+func (db *MemDatabase) GetKeys() []*ethutil.Key {
+	data, _ := db.Get([]byte("KeyRing"))
+
+	return []*ethutil.Key{ethutil.NewKeyFromBytes(data)}
+}
+*/
+
+func (db *MemDatabase) Delete(key []byte) error {
+	delete(db.db, string(key))
+
+	return nil
+}
+
+func (db *MemDatabase) Print() {
+	for key, val := range db.db {
+		fmt.Printf("%x(%d): ", key, len(key))
+		node := ethutil.NewValueFromBytes(val)
+		fmt.Printf("%q\n", node.Interface())
+	}
+}
+
+func (db *MemDatabase) Close() {
+}
+
+func (db *MemDatabase) LastKnownTD() []byte {
+	data, _ := db.Get([]byte("LastKnownTotalDifficulty"))
+
+	if len(data) == 0 || data == nil {
+		data = []byte{0x0}
+	}
+
+	return data
+}