mirror of
https://github.com/nspcc-dev/neo-go.git
synced 2024-12-04 19:19:44 +00:00
c2f70a179b
This reverts commit 168ba7960c.
It seems, there are some problems with it:
`2020-12-25T18:13:07.476+0300 WARN blockQueue: failed adding block into the blockchain {"error": "error while trying to apply MPT changes: unexpected EOF", "blockHeight": 9729, "nextIndex": 9730}`
105 lines
2.2 KiB
Go
105 lines
2.2 KiB
Go
package mpt
|
|
|
|
import (
|
|
"fmt"
|
|
|
|
"github.com/nspcc-dev/neo-go/pkg/crypto/hash"
|
|
"github.com/nspcc-dev/neo-go/pkg/io"
|
|
"github.com/nspcc-dev/neo-go/pkg/util"
|
|
)
|
|
|
|
// BaseNode implements basic things every node needs like caching hash and
|
|
// serialized representation. It's a basic node building block intended to be
|
|
// included into all node types.
|
|
type BaseNode struct {
|
|
hash util.Uint256
|
|
bytes []byte
|
|
hashValid bool
|
|
bytesValid bool
|
|
}
|
|
|
|
// BaseNodeIface abstracts away basic Node functions.
|
|
type BaseNodeIface interface {
|
|
Hash() util.Uint256
|
|
Type() NodeType
|
|
Bytes() []byte
|
|
}
|
|
|
|
type flushedNode interface {
|
|
setCache([]byte, util.Uint256)
|
|
}
|
|
|
|
func (b *BaseNode) setCache(bs []byte, h util.Uint256) {
|
|
b.bytes = bs
|
|
b.hash = h
|
|
b.bytesValid = true
|
|
b.hashValid = true
|
|
}
|
|
|
|
// getHash returns a hash of this BaseNode.
|
|
func (b *BaseNode) getHash(n Node) util.Uint256 {
|
|
if !b.hashValid {
|
|
b.updateHash(n)
|
|
}
|
|
return b.hash
|
|
}
|
|
|
|
// getBytes returns a slice of bytes representing this node.
|
|
func (b *BaseNode) getBytes(n Node) []byte {
|
|
if !b.bytesValid {
|
|
b.updateBytes(n)
|
|
}
|
|
return b.bytes
|
|
}
|
|
|
|
// updateHash updates hash field for this BaseNode.
|
|
func (b *BaseNode) updateHash(n Node) {
|
|
if n.Type() == HashT {
|
|
panic("can't update hash for hash node")
|
|
}
|
|
b.hash = hash.DoubleSha256(b.getBytes(n))
|
|
b.hashValid = true
|
|
}
|
|
|
|
// updateCache updates hash and bytes fields for this BaseNode.
|
|
func (b *BaseNode) updateBytes(n Node) {
|
|
buf := io.NewBufBinWriter()
|
|
encodeNodeWithType(n, buf.BinWriter)
|
|
b.bytes = buf.Bytes()
|
|
b.bytesValid = true
|
|
}
|
|
|
|
// invalidateCache sets all cache fields to invalid state.
|
|
func (b *BaseNode) invalidateCache() {
|
|
b.bytesValid = false
|
|
b.hashValid = false
|
|
}
|
|
|
|
// encodeNodeWithType encodes node together with it's type.
|
|
func encodeNodeWithType(n Node, w *io.BinWriter) {
|
|
w.WriteB(byte(n.Type()))
|
|
n.EncodeBinary(w)
|
|
}
|
|
|
|
// DecodeNodeWithType decodes node together with it's type.
|
|
func DecodeNodeWithType(r *io.BinReader) Node {
|
|
if r.Err != nil {
|
|
return nil
|
|
}
|
|
var n Node
|
|
switch typ := NodeType(r.ReadB()); typ {
|
|
case BranchT:
|
|
n = new(BranchNode)
|
|
case ExtensionT:
|
|
n = new(ExtensionNode)
|
|
case HashT:
|
|
n = new(HashNode)
|
|
case LeafT:
|
|
n = new(LeafNode)
|
|
default:
|
|
r.Err = fmt.Errorf("invalid node type: %x", typ)
|
|
return nil
|
|
}
|
|
n.DecodeBinary(r)
|
|
return n
|
|
}
|