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b1d3ca0206
* [NOD-177] Removed references to idMerkleRoot. * [NOD-177] Generated new genesis hashes. * [NOD-177] Generated new blk_ blocks. * [NOD-177] Fixed TestHaveBlock. * [NOD-177] Fixed The rest of the tests. * [NOD-177] Fixed a couple of comments and a duplicate test. * [NOD-177] Fixed blocks1-256.bz2.
72 lines
2.6 KiB
Go
72 lines
2.6 KiB
Go
// Copyright (c) 2014-2016 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 blockdag_test
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import (
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"fmt"
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"os"
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"path/filepath"
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"github.com/daglabs/btcd/blockdag"
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"github.com/daglabs/btcd/dagconfig"
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"github.com/daglabs/btcd/database"
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_ "github.com/daglabs/btcd/database/ffldb"
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"github.com/daglabs/btcd/util"
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)
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// This example demonstrates how to create a new chain instance and use
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// ProcessBlock to attempt to add a block to the chain. As the package
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// overview documentation describes, this includes all of the Bitcoin consensus
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// rules. This example intentionally attempts to insert a duplicate genesis
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// block to illustrate how an invalid block is handled.
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func ExampleBlockDAG_ProcessBlock() {
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// Create a new database to store the accepted blocks into. Typically
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// this would be opening an existing database and would not be deleting
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// and creating a new database like this, but it is done here so this is
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// a complete working example and does not leave temporary files laying
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// around.
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dbPath := filepath.Join(os.TempDir(), "exampleprocessblock")
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_ = os.RemoveAll(dbPath)
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db, err := database.Create("ffldb", dbPath, dagconfig.MainNetParams.Net)
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if err != nil {
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fmt.Printf("Failed to create database: %v\n", err)
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return
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}
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defer os.RemoveAll(dbPath)
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defer db.Close()
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// Create a new BlockDAG instance using the underlying database for
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// the main bitcoin network. This example does not demonstrate some
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// of the other available configuration options such as specifying a
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// notification callback and signature cache. Also, the caller would
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// ordinarily keep a reference to the median time source and add time
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// values obtained from other peers on the network so the local time is
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// adjusted to be in agreement with other peers.
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chain, err := blockdag.New(&blockdag.Config{
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DB: db,
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DAGParams: &dagconfig.MainNetParams,
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TimeSource: blockdag.NewMedianTime(),
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})
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if err != nil {
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fmt.Printf("Failed to create chain instance: %v\n", err)
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return
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}
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// Process a block. For this example, we are going to intentionally
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// cause an error by trying to process the genesis block which already
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// exists.
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genesisBlock := util.NewBlock(dagconfig.MainNetParams.GenesisBlock)
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isOrphan, err := chain.ProcessBlock(genesisBlock,
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blockdag.BFNone)
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if err != nil {
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fmt.Printf("Failed to process block: %v\n", err)
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return
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}
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fmt.Printf("Block accepted. Is it an orphan?: %v", isOrphan)
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// Output:
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// Failed to process block: already have block 63bbcfdd699ffd8cb19878564b14d3af8ba4d7ee4d1dd54925a7c21d5b5b5fdc
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}
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