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Update examples for recent btcdb changes.

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Since creating a new database with btcdb no longer automatically inserts
the main network genesis block, update the examples accordingly.
This commit is contained in:
Dave Collins 2013-07-29 12:35:01 -05:00
parent 761f666c44
commit e82c97be3b
2 changed files with 46 additions and 12 deletions
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29
README.md
View file

@ -82,19 +82,37 @@ intentionally causes an error by attempting to process a duplicate block.
_ "github.com/conformal/btcdb/sqlite3"
"github.com/conformal/btcutil"
"github.com/conformal/btcwire"
"os"
)
func main() {
// First, we create a new database to store the accepted blocks into.
// Typically this would be opening an existing database, but we create
// a new db here so this is a complete working example.
db, err := btcdb.CreateDB("sqlite", "example.db")
// Create a new database to store the accepted blocks into. Typically
// this would be opening an existing database, but we create a new db
// here so this is a complete working example. Also, typically the
// calls to os.Remove would not be used either, but again, we want
// a complete working example here, so we make sure to remove the
// database.
dbName := "example.db"
_ = os.Remove(dbName)
db, err := btcdb.CreateDB("sqlite", dbName)
if err != nil {
fmt.Printf("Failed to create database: %v\n", err)
return
}
defer os.Remove(dbName) // Ignore error.
defer db.Close()
// Insert the main network genesis block. This is part of the initial
// database setup. Like above, this typically would not be needed when
// opening an existing database.
pver := btcwire.ProtocolVersion
genesisBlock := btcutil.NewBlock(&btcwire.GenesisBlock, pver)
_, err = db.InsertBlock(genesisBlock)
if err != nil {
fmt.Printf("Failed to insert genesis block: %v\n", err)
return
}
// Create a new BlockChain instance using the underlying database for
// the main bitcoin network and ignore notifications.
chain := btcchain.New(db, btcwire.MainNet, nil)
@ -102,8 +120,7 @@ intentionally causes an error by attempting to process a duplicate block.
// Process a block. For this example, we are going to intentionally
// cause an error by trying to process the genesis block which already
// exists.
block := btcutil.NewBlock(&btcwire.GenesisBlock, btcwire.ProtocolVersion)
err = chain.ProcessBlock(block)
err = chain.ProcessBlock(genesisBlock)
if err != nil {
fmt.Printf("Failed to process block: %v\n", err)
return

29
doc.go
View file

@ -75,19 +75,37 @@ intentionally causes an error by attempting to process a duplicate block.
_ "github.com/conformal/btcdb/sqlite3"
"github.com/conformal/btcutil"
"github.com/conformal/btcwire"
"os"
)
func main() {
// First, we create a new database to store the accepted blocks into.
// Typically this would be opening an existing database, but we create
// a new db here so this is a complete working example.
db, err := btcdb.CreateDB("sqlite", "example.db")
// Create a new database to store the accepted blocks into. Typically
// this would be opening an existing database, but we create a new db
// here so this is a complete working example. Also, typically the
// calls to os.Remove would not be used either, but again, we want
// a complete working example here, so we make sure to remove the
// database.
dbName := "example.db"
_ = os.Remove(dbName)
db, err := btcdb.CreateDB("sqlite", dbName)
if err != nil {
fmt.Printf("Failed to create database: %v\n", err)
return
}
defer os.Remove(dbName) // Ignore error.
defer db.Close()
// Insert the main network genesis block. This is part of the initial
// database setup. Like above, this typically would not be needed when
// opening an existing database.
pver := btcwire.ProtocolVersion
genesisBlock := btcutil.NewBlock(&btcwire.GenesisBlock, pver)
_, err = db.InsertBlock(genesisBlock)
if err != nil {
fmt.Printf("Failed to insert genesis block: %v\n", err)
return
}
// Create a new BlockChain instance using the underlying database for
// the main bitcoin network and ignore notifications.
chain := btcchain.New(db, btcwire.MainNet, nil)
@ -95,8 +113,7 @@ intentionally causes an error by attempting to process a duplicate block.
// Process a block. For this example, we are going to intentionally
// cause an error by trying to process the genesis block which already
// exists.
block := btcutil.NewBlock(&btcwire.GenesisBlock, btcwire.ProtocolVersion)
err = chain.ProcessBlock(block)
err = chain.ProcessBlock(genesisBlock)
if err != nil {
fmt.Printf("Failed to process block: %v\n", err)
return