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authorFelix Lange <fjl@users.noreply.github.com>2017-06-27 21:57:06 +0800
committerGitHub <noreply@github.com>2017-06-27 21:57:06 +0800
commit9e5f03b6c487175cc5aa1224e5e12fd573f483a7 (patch)
tree475e573ff6c7e77cd069a2f6238afdb27d4bce43 /trie
parentbb366271fe33cf87b462dc5a25ac6c448ac6d2e1 (diff)
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core/state: access trie through Database interface, track errors (#14589)
With this commit, core/state's access to the underlying key/value database is mediated through an interface. Database errors are tracked in StateDB and returned by CommitTo or the new Error method. Motivation for this change: We can remove the light client's duplicated copy of core/state. The light client now supports node iteration, so tracing and storage enumeration can work with the light client (not implemented in this commit).
Diffstat (limited to 'trie')
-rw-r--r--trie/proof.go5
-rw-r--r--trie/secure_trie.go5
2 files changed, 8 insertions, 2 deletions
diff --git a/trie/proof.go b/trie/proof.go
index 1f8f76b1b..298f648c4 100644
--- a/trie/proof.go
+++ b/trie/proof.go
@@ -125,7 +125,7 @@ func VerifyProof(rootHash common.Hash, key []byte, proof []rlp.RawValue) (value
}
func get(tn node, key []byte) ([]byte, node) {
- for len(key) > 0 {
+ for {
switch n := tn.(type) {
case *shortNode:
if len(key) < len(n.Key) || !bytes.Equal(n.Key, key[:len(n.Key)]) {
@@ -140,9 +140,10 @@ func get(tn node, key []byte) ([]byte, node) {
return key, n
case nil:
return key, nil
+ case valueNode:
+ return nil, n
default:
panic(fmt.Sprintf("%T: invalid node: %v", tn, tn))
}
}
- return nil, tn.(valueNode)
}
diff --git a/trie/secure_trie.go b/trie/secure_trie.go
index 37d1d4b09..20c303f31 100644
--- a/trie/secure_trie.go
+++ b/trie/secure_trie.go
@@ -156,6 +156,11 @@ func (t *SecureTrie) Root() []byte {
return t.trie.Root()
}
+func (t *SecureTrie) Copy() *SecureTrie {
+ cpy := *t
+ return &cpy
+}
+
// NodeIterator returns an iterator that returns nodes of the underlying trie. Iteration
// starts at the key after the given start key.
func (t *SecureTrie) NodeIterator(start []byte) NodeIterator {