The great merge

ethdb/.gitignore

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+# 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
+

ethdb/README.md

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+# ethdb
+
+The ethdb package contains the ethereum database interfaces
+
+# Installation
+
+`go get github.com/ethereum/ethdb-go`
+
+# Usage
+
+Todo :-)

ethdb/database.go

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+package ethdb
+
+import (
+	"fmt"
+	"github.com/ethereum/eth-go/ethutil"
+	"github.com/syndtr/goleveldb/leveldb"
+	"path"
+)
+
+type LDBDatabase struct {
+	db *leveldb.DB
+}
+
+func NewLDBDatabase() (*LDBDatabase, error) {
+	dbPath := path.Join(ethutil.Config.ExecPath, "database")
+
+	// Open the db
+	db, err := leveldb.OpenFile(dbPath, nil)
+	if err != nil {
+		return nil, err
+	}
+
+	database := &LDBDatabase{db: db}
+
+	return database, nil
+}
+
+func (db *LDBDatabase) Put(key []byte, value []byte) {
+	err := db.db.Put(key, value, nil)
+	if err != nil {
+		fmt.Println("Error put", err)
+	}
+}
+
+func (db *LDBDatabase) Get(key []byte) ([]byte, error) {
+	return db.db.Get(key, nil)
+}
+
+func (db *LDBDatabase) LastKnownTD() []byte {
+	data, _ := db.db.Get([]byte("LastKnownTotalDifficulty"), nil)
+
+	if len(data) == 0 {
+		data = []byte{0x0}
+	}
+
+	return data
+}
+
+func (db *LDBDatabase) Close() {
+	// Close the leveldb database
+	db.db.Close()
+}
+
+func (db *LDBDatabase) Print() {
+	iter := db.db.NewIterator(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)
+	}
+}

ethdb/database_test.go

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+package ethdb
+
+import (
+	_ "fmt"
+	_ "testing"
+)

ethdb/memory_database.go

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+package ethdb
+
+import (
+	"fmt"
+	"github.com/ethereum/eth-go/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) Get(key []byte) ([]byte, error) {
+	return db.db[string(key)], nil
+}
+
+func (db *MemDatabase) Print() {
+	for key, val := range db.db {
+		fmt.Printf("%x(%d): ", key, len(key))
+		dec, _ := ethutil.Decode(val, 0)
+		node := ethutil.Conv(dec)
+		fmt.Printf("%q\n", node.AsRaw())
+	}
+}
+
+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
+}