62 lines
1.5 KiB
Go
62 lines
1.5 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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"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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// fetchBlockCmd defines the configuration options for the fetchblock command.
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type fetchBlockCmd struct{}
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var (
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// fetchBlockCfg defines the configuration options for the command.
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fetchBlockCfg = fetchBlockCmd{}
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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 *fetchBlockCmd) 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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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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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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// 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 %s", blockHash)
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startTime := time.Now()
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blockBytes, err := tx.FetchBlock(blockHash)
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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 in %v", time.Since(startTime))
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log.Infof("Block Hex: %s", hex.EncodeToString(blockBytes))
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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 *fetchBlockCmd) Usage() string {
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return "<block-hash>"
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}
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