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