94 lines
2.3 KiB
Go
94 lines
2.3 KiB
Go
// Copyright (c) 2015-2016 The btcsuite developers
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// Use of this source code is governed by an ISC
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// license that can be found in the LICENSE file.
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package main
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import (
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"time"
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"github.com/btcsuite/btcd/chaincfg/chainhash"
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"github.com/btcsuite/btcd/database"
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)
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// headersCmd defines the configuration options for the loadheaders command.
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type headersCmd struct {
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Bulk bool `long:"bulk" description:"Use bulk loading of headers instead of one at a time"`
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}
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var (
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// headersCfg defines the configuration options for the command.
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headersCfg = headersCmd{
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Bulk: false,
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}
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)
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// Execute is the main entry point for the command. It's invoked by the parser.
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func (cmd *headersCmd) Execute(args []string) error {
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// Setup the global config options and ensure they are valid.
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if err := setupGlobalConfig(); err != nil {
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return err
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}
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// Load the block database.
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db, err := loadBlockDB()
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if err != nil {
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return err
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}
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defer db.Close()
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// NOTE: This code will only work for ffldb. Ideally the package using
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// the database would keep a metadata index of its own.
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blockIdxName := []byte("ffldb-blockidx")
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if !headersCfg.Bulk {
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err = db.View(func(tx database.Tx) error {
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totalHdrs := 0
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blockIdxBucket := tx.Metadata().Bucket(blockIdxName)
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blockIdxBucket.ForEach(func(k, v []byte) error {
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totalHdrs++
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return nil
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})
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log.Infof("Loading headers for %d blocks...", totalHdrs)
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numLoaded := 0
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startTime := time.Now()
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blockIdxBucket.ForEach(func(k, v []byte) error {
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var hash chainhash.Hash
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copy(hash[:], k)
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_, err := tx.FetchBlockHeader(&hash)
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if err != nil {
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return err
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}
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numLoaded++
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return nil
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})
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log.Infof("Loaded %d headers in %v", numLoaded,
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time.Since(startTime))
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return nil
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})
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return err
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}
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// Bulk load headers.
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err = db.View(func(tx database.Tx) error {
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blockIdxBucket := tx.Metadata().Bucket(blockIdxName)
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hashes := make([]chainhash.Hash, 0, 500000)
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blockIdxBucket.ForEach(func(k, v []byte) error {
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var hash chainhash.Hash
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copy(hash[:], k)
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hashes = append(hashes, hash)
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return nil
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})
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log.Infof("Loading headers for %d blocks...", len(hashes))
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startTime := time.Now()
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hdrs, err := tx.FetchBlockHeaders(hashes)
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if err != nil {
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return err
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}
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log.Infof("Loaded %d headers in %v", len(hdrs),
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time.Since(startTime))
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return nil
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})
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return err
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}
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