TrueCloudLab/neo-go
8
0
Fork 0
mirror of https://github.com/nspcc-dev/neo-go.git synced 2024-11-29 23:33:37 +00:00
Code Issues Projects Releases Packages Wiki Activity

[Database] (#202)

Browse source 
Remove unnecesary methods
This commit is contained in:
decentralisedkev 2019-03-21 21:28:03 +00:00 committed by GitHub
parent c1b6738bdb
commit 9a1ef38689
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
1 changed files with 3 additions and 99 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

102
pkg/database/leveldb.go
View file

@ -1,13 +1,6 @@
package database
import (
"bytes"
"encoding/binary"
"fmt"
"github.com/CityOfZion/neo-go/pkg/wire/payload"
"github.com/CityOfZion/neo-go/pkg/wire/payload/transaction"
"github.com/CityOfZion/neo-go/pkg/wire/util"
"github.com/syndtr/goleveldb/leveldb"
"github.com/syndtr/goleveldb/leveldb/errors"
)
@ -32,29 +25,17 @@ type Database interface {
Close() error
}
var (
// TX is the prefix used when inserting a tx into the db
TX = []byte("TX")
// HEADER is the prefix used when inserting a header into the db
HEADER = []byte("HEADER")
// LATESTHEADER is the prefix used when inserting the latests header into the db
LATESTHEADER = []byte("LH")
// UTXO is the prefix used when inserting a utxo into the db
UTXO = []byte("UTXO")
)
// New will return a new leveldb instance
func New(path string) *LDB {
db, err := leveldb.OpenFile(path, nil)
if err != nil {
return nil
}
if _, corrupted := err.(*errors.ErrCorrupted); corrupted {
db, err = leveldb.RecoverFile(path, nil)
}
if err != nil {
return nil
}
return &LDB{
db,
path,
@ -85,80 +66,3 @@ func (l *LDB) Delete(key []byte) error {
func (l *LDB) Close() error {
return l.db.Close()
}
// AddHeader adds a header into the database
func (l *LDB) AddHeader(header *payload.BlockBase) error {
table := NewTable(l, HEADER)
byt, err := header.Bytes()
if err != nil {
fmt.Println("Could not Get bytes from decoded BlockBase")
return nil
}
fmt.Println("Adding Header, This should be batched!!!!")
// This is the main mapping
//Key: HEADER+BLOCKHASH Value: contents of blockhash
key := header.Hash.Bytes()
err = table.Put(key, byt)
if err != nil {
fmt.Println("Error trying to add the original mapping into the DB for Header. Mapping is [Header]+[Hash]")
return err
}
// This is the secondary mapping
// Key: HEADER + BLOCKHEIGHT Value: blockhash
bh := uint32ToBytes(header.Index)
key = []byte(bh)
err = table.Put(key, header.Hash.Bytes())
if err != nil {
return err
}
// This is the third mapping
// WARNING: This assumes that headers are adding in order.
return table.Put(LATESTHEADER, header.Hash.Bytes())
}
// AddTransactions adds a set of transactions into the database
func (l *LDB) AddTransactions(blockhash util.Uint256, txs []transaction.Transactioner) error {
// SHOULD BE DONE IN BATCH!!!!
for i, tx := range txs {
buf := new(bytes.Buffer)
fmt.Println(tx.ID())
tx.Encode(buf)
txByt := buf.Bytes()
txhash, err := tx.ID()
if err != nil {
fmt.Println("Error adding transaction with bytes", txByt)
return err
}
// This is the original mapping
// Key: [TX] + TXHASH
key := append(TX, txhash.Bytes()...)
l.Put(key, txByt)
// This is the index
// Key: [TX] + BLOCKHASH + I <- i is the incrementer from the for loop
//Value : TXHASH
key = append(TX, blockhash.Bytes()...)
key = append(key, uint32ToBytes(uint32(i))...)
err = l.Put(key, txhash.Bytes())
if err != nil {
fmt.Println("Error could not add tx index into db")
return err
}
}
return nil
}
// BigEndian
func uint32ToBytes(h uint32) []byte {
a := make([]byte, 4)
binary.BigEndian.PutUint32(a, h)
return a
}