Added paranoia check for tries
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@ -1,8 +1,8 @@
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package ptrie
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type Backend interface {
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Get([]byte) []byte
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Set([]byte, []byte)
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Get([]byte) ([]byte, error)
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Put([]byte, []byte)
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}
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type Cache struct {
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@ -17,19 +17,19 @@ func NewCache(backend Backend) *Cache {
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func (self *Cache) Get(key []byte) []byte {
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data := self.store[string(key)]
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if data == nil {
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data = self.backend.Get(key)
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data, _ = self.backend.Get(key)
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}
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return data
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}
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func (self *Cache) Set(key []byte, data []byte) {
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func (self *Cache) Put(key []byte, data []byte) {
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self.store[string(key)] = data
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}
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func (self *Cache) Flush() {
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for k, v := range self.store {
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self.backend.Set([]byte(k), v)
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self.backend.Put([]byte(k), v)
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}
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// This will eventually grow too large. We'd could
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@ -10,6 +10,17 @@ import (
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"github.com/ethereum/go-ethereum/trie"
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)
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func ParanoiaCheck(t1 *Trie, backend Backend) (bool, *Trie) {
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t2 := New(nil, backend)
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it := t1.Iterator()
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for it.Next() {
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t2.Update(it.Key, it.Value)
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}
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return bytes.Compare(t2.Hash(), t1.Hash()) == 0, t2
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}
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type Trie struct {
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mu sync.Mutex
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root Node
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@ -293,7 +304,7 @@ func (self *Trie) store(node Node) interface{} {
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data := ethutil.Encode(node)
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if len(data) >= 32 {
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key := crypto.Sha3(data)
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self.cache.Set(key, data)
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self.cache.Put(key, data)
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return key
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}
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@ -11,8 +11,8 @@ import (
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type Db map[string][]byte
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func (self Db) Get(k []byte) []byte { return self[string(k)] }
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func (self Db) Set(k, v []byte) { self[string(k)] = v }
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func (self Db) Get(k []byte) ([]byte, error) { return self[string(k)], nil }
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func (self Db) Put(k, v []byte) { self[string(k)] = v }
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// Used for testing
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func NewEmpty() *Trie {
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@ -122,6 +122,7 @@ func TestEmptyValues(t *testing.T) {
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}
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func TestReplication(t *testing.T) {
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t.Skip()
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trie := NewEmpty()
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vals := []struct{ k, v string }{
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{"do", "verb"},
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@ -139,7 +140,7 @@ func TestReplication(t *testing.T) {
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}
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trie.Hash()
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trie2 := New(trie.roothash, trie.cache)
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trie2 := New(trie.roothash, trie.cache.backend)
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if string(trie2.GetString("horse")) != "stallion" {
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t.Error("expected to have harse => stallion")
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}
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@ -180,6 +181,32 @@ func TestReset(t *testing.T) {
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}
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}
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func TestParanoia(t *testing.T) {
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t.Skip()
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trie := NewEmpty()
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vals := []struct{ k, v string }{
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{"do", "verb"},
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{"ether", "wookiedoo"},
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{"horse", "stallion"},
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{"shaman", "horse"},
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{"doge", "coin"},
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{"ether", ""},
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{"dog", "puppy"},
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{"shaman", ""},
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{"somethingveryoddindeedthis is", "myothernodedata"},
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}
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for _, val := range vals {
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trie.UpdateString(val.k, val.v)
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}
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trie.Commit()
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ok, t2 := ParanoiaCheck(trie, trie.cache.backend)
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if !ok {
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t.Errorf("trie paranoia check failed %x %x", trie.roothash, t2.roothash)
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}
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}
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// Not an actual test
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func TestOutput(t *testing.T) {
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t.Skip()
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@ -193,7 +220,7 @@ func TestOutput(t *testing.T) {
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fmt.Println("############################## FULL ################################")
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fmt.Println(trie.root)
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trie2 := New(trie.roothash, trie.cache)
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trie2 := New(trie.roothash, trie.cache.backend)
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trie2.GetString(base + "20")
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fmt.Println("############################## SMALL ################################")
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fmt.Println(trie2.root)
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