9ede6ae83e
This bumps the major version of the database module to v3. This is needed because the current code already has backwards incompatible changes.
91 lines
2.2 KiB
Go
91 lines
2.2 KiB
Go
// Copyright (c) 2015-2016 The btcsuite developers
|
|
// Copyright (c) 2016-2019 The Decred developers
|
|
// Use of this source code is governed by an ISC
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package main
|
|
|
|
import (
|
|
"encoding/hex"
|
|
"errors"
|
|
"strconv"
|
|
"time"
|
|
|
|
"github.com/decred/dcrd/chaincfg/chainhash"
|
|
"github.com/decred/dcrd/database/v3"
|
|
)
|
|
|
|
// blockRegionCmd defines the configuration options for the fetchblockregion
|
|
// command.
|
|
type blockRegionCmd struct{}
|
|
|
|
var (
|
|
// blockRegionCfg defines the configuration options for the command.
|
|
blockRegionCfg = blockRegionCmd{}
|
|
)
|
|
|
|
// Execute is the main entry point for the command. It's invoked by the parser.
|
|
func (cmd *blockRegionCmd) Execute(args []string) error {
|
|
// Setup the global config options and ensure they are valid.
|
|
if err := setupGlobalConfig(); err != nil {
|
|
return err
|
|
}
|
|
|
|
// Ensure expected arguments.
|
|
if len(args) < 1 {
|
|
return errors.New("required block hash parameter not specified")
|
|
}
|
|
if len(args) < 2 {
|
|
return errors.New("required start offset parameter not " +
|
|
"specified")
|
|
}
|
|
if len(args) < 3 {
|
|
return errors.New("required region length parameter not " +
|
|
"specified")
|
|
}
|
|
|
|
// Parse arguments.
|
|
blockHash, err := chainhash.NewHashFromStr(args[0])
|
|
if err != nil {
|
|
return err
|
|
}
|
|
startOffset, err := strconv.ParseUint(args[1], 10, 32)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
regionLen, err := strconv.ParseUint(args[2], 10, 32)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
// Load the block database.
|
|
db, err := loadBlockDB()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer db.Close()
|
|
|
|
return db.View(func(tx database.Tx) error {
|
|
log.Infof("Fetching block region %s<%d:%d>", blockHash,
|
|
startOffset, startOffset+regionLen-1)
|
|
region := database.BlockRegion{
|
|
Hash: blockHash,
|
|
Offset: uint32(startOffset),
|
|
Len: uint32(regionLen),
|
|
}
|
|
startTime := time.Now()
|
|
regionBytes, err := tx.FetchBlockRegion(®ion)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
log.Infof("Loaded block region in %v", time.Since(startTime))
|
|
log.Infof("Region Hex: %s", hex.EncodeToString(regionBytes))
|
|
return nil
|
|
})
|
|
}
|
|
|
|
// Usage overrides the usage display for the command.
|
|
func (cmd *blockRegionCmd) Usage() string {
|
|
return "<block-hash> <start-offset> <length-of-region>"
|
|
}
|