/
dropafter.go
227 lines (202 loc) · 5.44 KB
/
dropafter.go
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// Copyright (c) 2013 The btcsuite developers
// Use of this source code is governed by an ISC
// license that can be found in the LICENSE file.
package main
import (
"errors"
"fmt"
"os"
"path/filepath"
"strconv"
"github.com/btcsuite/btclog"
flags "github.com/btcsuite/go-flags"
"github.com/ppcsuite/btcutil"
"github.com/ppcsuite/ppcd/chaincfg"
"github.com/ppcsuite/ppcd/database"
_ "github.com/ppcsuite/ppcd/database/ldb"
"github.com/ppcsuite/ppcd/wire"
)
type config struct {
DataDir string `short:"b" long:"datadir" description:"Directory to store data"`
DbType string `long:"dbtype" description:"Database backend"`
TestNet3 bool `long:"testnet" description:"Use the test network"`
RegressionTest bool `long:"regtest" description:"Use the regression test network"`
SimNet bool `long:"simnet" description:"Use the simulation test network"`
ShaString string `short:"s" description:"Block SHA to process" required:"true"`
}
var (
btcdHomeDir = btcutil.AppDataDir("ppcd", false)
defaultDataDir = filepath.Join(btcdHomeDir, "data")
log btclog.Logger
activeNetParams = &chaincfg.MainNetParams
)
const (
argSha = iota
argHeight
)
// netName returns the name used when referring to a bitcoin network. At the
// time of writing, btcd currently places blocks for testnet version 3 in the
// data and log directory "testnet", which does not match the Name field of the
// chaincfg parameters. This function can be used to override this directory name
// as "testnet" when the passed active network matches wire.TestNet3.
//
// A proper upgrade to move the data and log directories for this network to
// "testnet3" is planned for the future, at which point this function can be
// removed and the network parameter's name used instead.
func netName(chainParams *chaincfg.Params) string {
switch chainParams.Net {
case wire.TestNet3:
return "testnet"
default:
return chainParams.Name
}
}
func main() {
cfg := config{
DbType: "leveldb",
DataDir: defaultDataDir,
}
parser := flags.NewParser(&cfg, flags.Default)
_, err := parser.Parse()
if err != nil {
if e, ok := err.(*flags.Error); !ok || e.Type != flags.ErrHelp {
parser.WriteHelp(os.Stderr)
}
return
}
backendLogger := btclog.NewDefaultBackendLogger()
defer backendLogger.Flush()
log = btclog.NewSubsystemLogger(backendLogger, "")
database.UseLogger(log)
// Multiple networks can't be selected simultaneously.
funcName := "main"
numNets := 0
// Count number of network flags passed; assign active network params
// while we're at it
if cfg.TestNet3 {
numNets++
activeNetParams = &chaincfg.TestNet3Params
}
if cfg.RegressionTest {
numNets++
activeNetParams = &chaincfg.RegressionNetParams
}
if cfg.SimNet {
numNets++
activeNetParams = &chaincfg.SimNetParams
}
if numNets > 1 {
str := "%s: The testnet, regtest, and simnet params can't be " +
"used together -- choose one of the three"
err := fmt.Errorf(str, funcName)
fmt.Fprintln(os.Stderr, err)
parser.WriteHelp(os.Stderr)
return
}
cfg.DataDir = filepath.Join(cfg.DataDir, netName(activeNetParams))
blockDbNamePrefix := "blocks"
dbName := blockDbNamePrefix + "_" + cfg.DbType
if cfg.DbType == "sqlite" {
dbName = dbName + ".db"
}
dbPath := filepath.Join(cfg.DataDir, dbName)
log.Infof("loading db")
db, err := database.OpenDB(cfg.DbType, dbPath)
if err != nil {
log.Warnf("db open failed: %v", err)
return
}
defer db.Close()
log.Infof("db load complete")
_, height, err := db.NewestSha()
log.Infof("loaded block height %v", height)
sha, err := getSha(db, cfg.ShaString)
if err != nil {
log.Infof("Invalid block hash %v", cfg.ShaString)
return
}
err = db.DropAfterBlockBySha(&sha)
if err != nil {
log.Warnf("failed %v", err)
}
}
func getSha(db database.Db, str string) (wire.ShaHash, error) {
argtype, idx, sha, err := parsesha(str)
if err != nil {
log.Warnf("unable to decode [%v] %v", str, err)
return wire.ShaHash{}, err
}
switch argtype {
case argSha:
// nothing to do
case argHeight:
sha, err = db.FetchBlockShaByHeight(idx)
if err != nil {
return wire.ShaHash{}, err
}
}
if sha == nil {
fmt.Printf("wtf sha is nil but err is %v", err)
}
return *sha, nil
}
var ntxcnt int64
var txspendcnt int64
var txgivecnt int64
var errBadShaPrefix = errors.New("invalid prefix")
var errBadShaLen = errors.New("invalid len")
var errBadShaChar = errors.New("invalid character")
func parsesha(argstr string) (argtype int, height int64, psha *wire.ShaHash, err error) {
var sha wire.ShaHash
var hashbuf string
switch len(argstr) {
case 64:
hashbuf = argstr
case 66:
if argstr[0:2] != "0x" {
log.Infof("prefix is %v", argstr[0:2])
err = errBadShaPrefix
return
}
hashbuf = argstr[2:]
default:
if len(argstr) <= 16 {
// assume value is height
argtype = argHeight
var h int
h, err = strconv.Atoi(argstr)
if err == nil {
height = int64(h)
return
}
log.Infof("Unable to parse height %v, err %v", height, err)
}
err = errBadShaLen
return
}
var buf [32]byte
for idx, ch := range hashbuf {
var val rune
switch {
case ch >= '0' && ch <= '9':
val = ch - '0'
case ch >= 'a' && ch <= 'f':
val = ch - 'a' + rune(10)
case ch >= 'A' && ch <= 'F':
val = ch - 'A' + rune(10)
default:
err = errBadShaChar
return
}
b := buf[31-idx/2]
if idx&1 == 1 {
b |= byte(val)
} else {
b |= (byte(val) << 4)
}
buf[31-idx/2] = b
}
sha.SetBytes(buf[0:32])
psha = &sha
return
}