bd4e64d1d4
This is mostly a backport of some of the same modifications made in Decred along with a few additional things cleaned up. In particular, this updates the code to make use of the new chainhash package. Also, since this required API changes anyways and the hash algorithm is no longer tied specifically to SHA, all other functions throughout the code base which had "Sha" in their name have been changed to Hash so they are not incorrectly implying the hash algorithm. The following is an overview of the changes: - Remove the wire.ShaHash type - Update all references to wire.ShaHash to the new chainhash.Hash type - Rename the following functions and update all references: - wire.BlockHeader.BlockSha -> BlockHash - wire.MsgBlock.BlockSha -> BlockHash - wire.MsgBlock.TxShas -> TxHashes - wire.MsgTx.TxSha -> TxHash - blockchain.ShaHashToBig -> HashToBig - peer.ShaFunc -> peer.HashFunc - Rename all variables that included sha in their name to include hash instead - Update for function name changes in other dependent packages such as btcutil - Update copyright dates on all modified files - Update glide.lock file to use the required version of btcutil
91 lines
2.2 KiB
Go
91 lines
2.2 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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"encoding/hex"
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"errors"
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"strconv"
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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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// blockRegionCmd defines the configuration options for the fetchblockregion
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// command.
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type blockRegionCmd struct{}
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var (
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// blockRegionCfg defines the configuration options for the command.
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blockRegionCfg = blockRegionCmd{}
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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 *blockRegionCmd) 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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// Ensure expected arguments.
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if len(args) < 1 {
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return errors.New("required block hash parameter not specified")
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}
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if len(args) < 2 {
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return errors.New("required start offset parameter not " +
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"specified")
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}
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if len(args) < 3 {
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return errors.New("required region length parameter not " +
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"specified")
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}
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// Parse arguments.
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blockHash, err := chainhash.NewHashFromStr(args[0])
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if err != nil {
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return err
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}
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startOffset, err := strconv.ParseUint(args[1], 10, 32)
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if err != nil {
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return err
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}
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regionLen, err := strconv.ParseUint(args[2], 10, 32)
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if 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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return db.View(func(tx database.Tx) error {
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log.Infof("Fetching block region %s<%d:%d>", blockHash,
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startOffset, startOffset+regionLen-1)
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region := database.BlockRegion{
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Hash: blockHash,
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Offset: uint32(startOffset),
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Len: uint32(regionLen),
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}
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startTime := time.Now()
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regionBytes, err := tx.FetchBlockRegion(®ion)
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if err != nil {
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return err
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}
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log.Infof("Loaded block region in %v", time.Now().Sub(startTime))
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log.Infof("Double Hash: %s", chainhash.DoubleHashH(regionBytes))
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log.Infof("Region Hex: %s", hex.EncodeToString(regionBytes))
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return nil
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})
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}
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// Usage overrides the usage display for the command.
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func (cmd *blockRegionCmd) Usage() string {
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return "<block-hash> <start-offset> <length-of-region>"
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}
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