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bitcoinbook
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Code Issues Releases Wiki Activity

Remove unused code examples

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develop
David A. Harding 8 months ago
parent 727d74d4ba
commit 064b6a7da7
6 changed files with 0 additions and 301 deletions
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43
code/bip-table.py
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@ -1,43 +0,0 @@
# Convert mediawiki list of BIPs to asciidoc table for book appendix
# Gnarly hack of regex with no error checking - it worked once
import re
regex_num = re.compile("\\|.\\[\\[bip-\\d+.mediawiki\\|(\\d+)\\]\\]")
regex_altnum = re.compile("\\D+(\\d+)\\D+")
bips = []
f = open('README.mediawiki.txt', 'r')
line = f.readline()
while (line[0] != "|"):
line = f.readline()
while (line[1] == '-'):
line_num = f.readline()
line_layer = f.readline()[2:-1]
line_title = f.readline()[2:-1]
line_owner = f.readline()[2:-1]
line_type = f.readline()[2:-1]
line_status = f.readline()[2:-1]
line = f.readline()
while (line[0] != "|"):
line = f.readline()
num = regex_num.match(line_num)
alt_num = regex_altnum.match(line_num)
if num:
bip_num = num.group(1)
elif alt_num:
bip_num = alt_num.group(1)
print("|[[bip-{0}]]https://github.com/bitcoin/bips/blob/master/bip-{0:04d}"
".mediawiki[BIP-{0}] |{1} |{2} |{3} |{4} ".format(int(bip_num),
line_title,
line_owner,
line_type,
line_status))
f.close()

45
code/extract-from-pk-script.go
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package main
import (
"encoding/hex"
"fmt"
"os"
"github.com/conformal/btcnet"
"github.com/conformal/btcscript"
)
// go run extract-from-pk-script.go
// This example demonstrates extracting information from a standard public key
// script.
func main() {
scriptHex := "76a914128004ff2fcaf13b2b91eb654b1dc2b674f7ec6188ac"
ExtractPkScriptAddrs(scriptHex)
// Output:
// Script Class: pubkeyhash
// Addresses: [12gpXQVcCL2qhTNQgyLVdCFG2Qs2px98nV]
// Required Signatures: 1
}
func ExtractPkScriptAddrs(scriptHex string) {
script, err := hex.DecodeString(scriptHex)
handle(err)
// Extract and print details from the script.
scriptClass, addresses, reqSigs, err := btcscript.ExtractPkScriptAddrs(script, &btcnet.MainNetParams)
handle(err)
fmt.Println("Script Class:", scriptClass)
fmt.Println("Addresses:", addresses)
fmt.Println("Required Signatures:", reqSigs)
}
func handle(err error) {
if err != nil {
fmt.Println(err)
os.Exit(1)
}
}

8
code/p2wpkh.js
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var btc = require('bitcore-lib')
var oldAddress = btc.Address.fromString("1Ek9S3QNnutPV7GhtzR8Lr8yKPhxnUP8iw") // here's the old address
var oldHash = oldAddress.hashBuffer
var segwitP2PKH = Buffer.concat([new Buffer("0014","hex"), oldHash]) // 0x00 + 0x14 (pushdata 20 bytes) + old pubkeyhash
var p2shHash = btc.crypto.Hash.sha256ripemd160(segwitP2PKH)
var p2shAddress = btc.Address.fromScriptHash(p2shHash)
var newAddress = p2shAddress.toString()
// 36ghjA1KSAB1jDYD2RdiexEcY7r6XjmDQk

48
code/pay-to-addr-script.go
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@ -1,48 +0,0 @@
package main
import (
"fmt"
"os"
"github.com/conformal/btcnet"
"github.com/conformal/btcscript"
"github.com/conformal/btcutil"
)
// This example demonstrates creating a script which pays to a Bitcoin address.
// It also prints the created script hex and uses the DisasmString function to
// display the disassembled script.
func main() {
addressStr := "12gpXQVcCL2qhTNQgyLVdCFG2Qs2px98nV"
PayToAddrScript(addressStr)
// Output:
// Script Hex: 76a914128004ff2fcaf13b2b91eb654b1dc2b674f7ec6188ac
// Script Disassembly: OP_DUP OP_HASH160 128004ff2fcaf13b2b91eb654b1dc2b674f7ec61 OP_EQUALVERIFY OP_CHECKSIG
}
func PayToAddrScript(addressStr string) {
// Parse the address to send the coins to into a btcutil.Address
// which is useful to ensure the accuracy of the address and determine
// the address type. It is also required for the upcoming call to
// PayToAddrScript.
address, err := btcutil.DecodeAddress(addressStr, &btcnet.MainNetParams)
handle(err)
// Create a public key script that pays to the address.
script, err := btcscript.PayToAddrScript(address)
handle(err)
fmt.Printf("Script Hex: %x\n", script)
disasm, err := btcscript.DisasmString(script)
handle(err)
fmt.Println("Script Disassembly:", disasm)
}
func handle(err error) {
if err != nil {
fmt.Println(err)
os.Exit(1)
}
}

71
code/select-utxo.py
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@ -1,71 +0,0 @@
# Selects outputs from a UTXO list using a greedy algorithm.
from sys import argv
try:
long # Python 2
except NameError:
long = int # Python 3
class OutputInfo:
def __init__(self, tx_hash, tx_index, value):
self.tx_hash = tx_hash
self.tx_index = tx_index
self.value = value
def __repr__(self):
return "<%s:%s with %s Satoshis>" % (self.tx_hash, self.tx_index,
self.value)
# Select optimal outputs for a send from unspent outputs list.
# Returns output list and remaining change to be sent to
# a change address.
def select_outputs_greedy(unspent, min_value):
# Fail if empty.
if not unspent:
return None
# Partition into 2 lists.
lessers = [utxo for utxo in unspent if utxo.value < min_value]
greaters = [utxo for utxo in unspent if utxo.value >= min_value]
key_func = lambda utxo: utxo.value
if greaters:
# Not-empty. Find the smallest greater.
min_greater = min(greaters, key=key_func)
change = min_greater.value - min_value
return [min_greater], "Change: %d Satoshis" % change
# Not found in greaters. Try several lessers instead.
# Rearrange them from biggest to smallest. We want to use the least
# amount of inputs as possible.
lessers.sort(key=key_func, reverse=True)
result = []
accum = 0
for utxo in lessers:
result.append(utxo)
accum += utxo.value
if accum >= min_value:
change = accum - min_value
return result, "Change: %d Satoshis" % change
# No results found.
return None, 0
def main():
unspent = [
OutputInfo("ebadfaa92f1fd29e2fe296eda702c48bd11ffd52313e986e99ddad9084062167", 1, 8000000),
OutputInfo("6596fd070679de96e405d52b51b8e1d644029108ec4cbfe451454486796a1ecf", 0, 16050000),
OutputInfo("b2affea89ff82557c60d635a2a3137b8f88f12ecec85082f7d0a1f82ee203ac4", 0, 10000000),
OutputInfo("7dbc497969c7475e45d952c4a872e213fb15d45e5cd3473c386a71a1b0c136a1", 0, 25000000),
OutputInfo("55ea01bd7e9afd3d3ab9790199e777d62a0709cf0725e80a7350fdb22d7b8ec6", 17, 5470541),
OutputInfo("12b6a7934c1df821945ee9ee3b3326d07ca7a65fd6416ea44ce8c3db0c078c64", 0, 10000000),
OutputInfo("7f42eda67921ee92eae5f79bd37c68c9cb859b899ce70dba68c48338857b7818", 0, 16100000),
]
target = long(argv[1]) if len(argv) > 1 else 55000000
print("For transaction amount %d Satoshis (%f bitcoin) use: " %
(target, target / 10.0 ** 8))
print(select_outputs_greedy(unspent, target))
if __name__ == "__main__":
main()

86
code/websocket-example.go
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@ -1,86 +0,0 @@
package main
import (
"io/ioutil"
"log"
"path/filepath"
"time"
"github.com/conformal/btcrpcclient"
"github.com/conformal/btcutil"
"github.com/conformal/btcwire"
)
// This example demonstrates a connection to the Bitcoin network
// by using websockets via btcd, use of notifications and an rpc
// call to getblockcount.
//
// Install and run btcd:
// $ go get github.com/conformal/btcd/...
// $ btcd -u rpcuser -P rpcpass
//
// Install btcrpcclient:
// $ go get github.com/conformal/btcrpcclient
//
// Run this example:
// $ go run websocket-example.go
//
func main() {
// Only override the handlers for notifications you care about.
// Also note most of these handlers will only be called if you register
// for notifications. See the documentation of the btcrpcclient
// NotificationHandlers type for more details about each handler.
ntfnHandlers := btcrpcclient.NotificationHandlers{
OnBlockConnected: func(hash *btcwire.ShaHash, height int32) {
log.Printf("Block connected: %v (%d)", hash, height)
},
OnBlockDisconnected: func(hash *btcwire.ShaHash, height int32) {
log.Printf("Block disconnected: %v (%d)", hash, height)
},
}
// Connect to local btcd RPC server using websockets.
btcdHomeDir := btcutil.AppDataDir("btcd", false)
certs, err := ioutil.ReadFile(filepath.Join(btcdHomeDir, "rpc.cert"))
if err != nil {
log.Fatal(err)
}
connCfg := &btcrpcclient.ConnConfig{
Host: "localhost:8334",
Endpoint: "ws",
User: "rpcuser",
Pass: "rpcpass",
Certificates: certs,
}
client, err := btcrpcclient.New(connCfg, &ntfnHandlers)
if err != nil {
log.Fatal(err)
}
// Register for block connect and disconnect notifications.
if err := client.NotifyBlocks(); err != nil {
log.Fatal(err)
}
log.Println("NotifyBlocks: Registration Complete")
// Get the current block count.
blockCount, err := client.GetBlockCount()
if err != nil {
log.Fatal(err)
}
log.Printf("Block count: %d", blockCount)
// For this example gracefully shutdown the client after 10 seconds.
// Ordinarily when to shutdown the client is highly application
// specific.
log.Println("Client shutdown in 10 seconds...")
time.AfterFunc(time.Second*10, func() {
log.Println("Client shutting down...")
client.Shutdown()
log.Println("Client shutdown complete.")
})
// Wait until the client either shuts down gracefully (or the user
// terminates the process with Ctrl+C).
client.WaitForShutdown()
}
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