159 lines
3.6 KiB
Go
159 lines
3.6 KiB
Go
package server
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import (
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"encoding/hex"
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"encoding/json"
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"fmt"
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"os"
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"path/filepath"
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"github.com/nspcc-dev/neo-go/pkg/core/storage"
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"github.com/nspcc-dev/neo-go/pkg/util"
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)
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type dump []interface{}
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type storageOp struct {
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State string `json:"state"`
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Key string `json:"key"`
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Value string `json:"value,omitempty"`
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}
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// NEO has some differences of key storing.
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// out format: script hash in LE + key
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// neo format: script hash in BE + byte(0) + key with 0 between every 16 bytes, padded to len 16.
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func toNeoStorageKey(key []byte) []byte {
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if len(key) < util.Uint160Size {
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panic("invalid key in storage")
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}
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var nkey []byte
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for i := util.Uint160Size - 1; i >= 0; i-- {
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nkey = append(nkey, key[i])
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}
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key = key[util.Uint160Size:]
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index := 0
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remain := len(key)
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for remain >= 16 {
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nkey = append(nkey, key[index:index+16]...)
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nkey = append(nkey, 0)
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index += 16
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remain -= 16
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}
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if remain > 0 {
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nkey = append(nkey, key[index:]...)
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}
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padding := 16 - remain
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for i := 0; i < padding; i++ {
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nkey = append(nkey, 0)
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}
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nkey = append(nkey, byte(padding))
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return nkey
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}
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// batchToMap converts batch to a map so that JSON is compatible
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// with https://github.com/NeoResearch/neo-storage-audit/
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func batchToMap(index uint32, batch *storage.MemBatch) map[string]interface{} {
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size := len(batch.Put) + len(batch.Deleted)
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ops := make([]storageOp, 0, size)
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for i := range batch.Put {
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key := batch.Put[i].Key
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if len(key) == 0 || key[0] != byte(storage.STStorage) {
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continue
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}
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op := "Added"
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if batch.Put[i].Exists {
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op = "Changed"
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}
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key = toNeoStorageKey(key[1:])
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ops = append(ops, storageOp{
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State: op,
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Key: hex.EncodeToString(key),
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Value: "00" + hex.EncodeToString(batch.Put[i].Value),
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})
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}
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for i := range batch.Deleted {
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key := batch.Deleted[i].Key
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if len(key) == 0 || key[0] != byte(storage.STStorage) || !batch.Deleted[i].Exists {
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continue
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}
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key = toNeoStorageKey(key[1:])
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ops = append(ops, storageOp{
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State: "Deleted",
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Key: hex.EncodeToString(key),
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})
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}
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return map[string]interface{}{
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"block": index,
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"size": len(ops),
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"storage": ops,
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}
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}
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func newDump() *dump {
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return new(dump)
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}
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func (d *dump) add(index uint32, batch *storage.MemBatch) {
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m := batchToMap(index, batch)
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*d = append(*d, m)
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}
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func (d *dump) tryPersist(prefix string, index uint32) error {
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f, err := createFile(prefix, index)
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if err != nil {
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return err
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}
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defer f.Close()
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enc := json.NewEncoder(f)
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enc.SetIndent("", " ")
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if err := enc.Encode(*d); err != nil {
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return err
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}
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*d = (*d)[:0]
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return nil
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}
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// createFile creates directory and file in it for storing blocks up to index.
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// Directory structure is the following:
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// https://github.com/NeoResearch/neo-storage-audit#folder-organization-where-to-find-the-desired-block
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// Dir `BlockStorage_$DIRNO` contains blocks up to $DIRNO (from $DIRNO-100k)
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// Inside it there are files grouped by 1k blocks.
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// File dump-block-$FILENO.json contains blocks from $FILENO-999, $FILENO
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// Example: file `BlockStorage_100000/dump-block-6000.json` contains blocks from 5001 to 6000.
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func createFile(prefix string, index uint32) (*os.File, error) {
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dirN := (index-1)/100000 + 1
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dir := fmt.Sprintf("BlockStorage_%d00000", dirN)
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path := filepath.Join(prefix, dir)
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info, err := os.Stat(path)
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if os.IsNotExist(err) {
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err := os.MkdirAll(path, os.ModePerm)
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if err != nil {
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return nil, err
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}
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} else if !info.IsDir() {
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return nil, fmt.Errorf("file `%s` is not a directory", path)
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}
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fileN := (index-1)/1000 + 1
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file := fmt.Sprintf("dump-block-%d000.json", fileN)
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path = filepath.Join(path, file)
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return os.Create(path)
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}
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