0e47daf6ba
This commit ports the database2 package from btcsuite pulled in via the previous commit to Decred. It includes updating all necessary package imports, types, logic, copyrights, and documentation as well as replacing the first 256 Bitcoin blocks in the test data with the first 256 Decred blocks.
64 lines
1.5 KiB
Go
64 lines
1.5 KiB
Go
// Copyright (c) 2015-2016 The btcsuite developers
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// Copyright (c) 2016 The Decred 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/decred/dcrd/chaincfg/chainhash"
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database "github.com/decred/dcrd/database2"
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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.Now().Sub(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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