Topic: libbitcoin - page 8. (Read 92487 times)

import bitcoin
import time

class Application:

    def __init__(self):
        self.stopped = False
        self.net = bitcoin.network()
        self.channel = None

    def start(self):
        self.net.connect("localhost", 8333, self.handle_connect)

    def stop(self):
        self.stopped = True

    def is_stopped(self):
        return self.stopped

    def create_version_message(self):
        vers = bitcoin.version()
        vers.version = 60000
        vers.services = 1
        vers.address_me.servies = 1
        vers.address_me.ip = \
            [0, 0, 0, 0, 0, 0, 0, 0,
             0, 0, 255, 255, 127, 0, 0, 1]
        vers.address_me.port = 8333
        vers.address_you.services = 1
        vers.address_you.ip = \
            [0, 0, 0, 0, 0, 0, 0, 0,
             0, 0, 255, 255, 127, 0, 0, 1]
        vers.address_you.port = 8333
        vers.user_agent = "/libbitcoin:0.4/example:1/";
        vers.start_height = 0
        vers.nonce = 42
        return vers

    # First we send our version message then the node will reply back
    def handle_connect(self, ec, channel):
        # check the error_code
        if ec:
            print 'Could not connect:', ec
            self.stop()
            return
        self.channel = channel
        version_message = self.create_version_message()
        self.channel.send_version(version_message, self.handle_send)
        self.channel.subscribe_version(self.read_version_reply)

    def handle_send(self, ec):
        if ec:
            print 'Problem sending:', ec
            self.stop()

    def read_version_reply(self, ec, vers):
        if ec:
            print 'Problem in reply:', ec
            self.stop()
            return
        # Display the version message back
        print vers.address_me.ip
        self.stop()

if __name__ == "__main__":
    app = Application()
    app.start()
    while not app.is_stopped():
        time.sleep(0.1)

import bitcoin


d = bitcoin.data_chunk("001212")
print d
h = bitcoin.hash_digest("000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f")
print h
if h == "000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f":
    print 'Yes'
print len(h)

tx = bitcoin.transaction()
print bitcoin.hash_transaction(tx)

netaddr = bitcoin.network_address()
print netaddr.ip

s = bitcoin.script()
o = bitcoin.operation()
o.code = bitcoin.opcode.special
s.push_operation(o)
o.code = bitcoin.opcode.nop
o.data = bitcoin.data_chunk("deadbeef")
s.push_operation(o)
o = bitcoin.operation()
o.code = bitcoin.opcode.hash160
s.push_operation(o)
print s
print s.operations()
print s.type()

import bitcoin

raw_tx_repr = "010000000187493c4c15c76df9f69ddd7aeb7ffbcddad4b7a979210f19602282d5b9862581000000008a47304402202d9e9f75be9c8a4c4304931b032e1de83fd2c6af2c1154a3d2b885efd5c3bfda02201184139215fb74499eae9c71ae86354c41b4d20b95a6b1fffcb8f1c5f051288101410497d11f5c33adb7c3fed0adc637358279de04f72851b7b93fb4a8655613729047c7e2908966551b5fb7f6899f6c3dd358b57eb20a61b2c9909aa106eac6310f9fffffffff0140420f00000000001976a91407e761706c63b36e5a328fab1d94e9397f40704d88b000000000"
raw_tx = bitcoin.data_chunk(raw_tx_repr)
print raw_tx
print len(raw_tx)

ex = bitcoin.satoshi_exporter()
tx = ex.load_transaction(raw_tx)
print "txhash", bitcoin.hash_transaction(tx)
print tx
print ex.save_transaction(tx)
print len(ex.save_transaction(tx))
assert str(ex.save_transaction(tx)) == raw_tx_repr

import bitcoin

ec = bitcoin.elliptic_curve_key()
print ec.new_key_pair()
privdat = ec.private_key()
print privdat

ec1 = bitcoin.elliptic_curve_key()
ec1.set_private_key(privdat)
assert str(ec1.private_key()) == str(privdat)

h = bitcoin.hash_digest("f003f0c1193019db2497a675fd05d9f2edddf9b67c59e677c48d3dbd4ed5f00b")
print h
sig = ec1.sign(h)
print ec.verify(h, sig)

#include
using namespace libbitcoin;

using std::placeholders::_1;
using std::placeholders::_2;

class pollapp
  : public threaded_service,
    public std::enable_shared_from_this
{
public:
    pollapp();

    void start(std::string hostname, unsigned int port);

private:
    void handle_connect(const std::error_code& ec, channel_ptr node);
    void initial_ask_blocks(const std::error_code& ec,
        const message::block_locator& loc);

    void recv_inv(const std::error_code& ec,
        const message::inventory& packet);
    void recv_blk(const std::error_code& ec,
        const message::block& blk);

    void handle_store(const std::error_code& ec, block_info info,
        const hash_digest& block_hash);
    void ask_blocks(const std::error_code& ec,
        const message::block_locator& loc, const hash_digest& hash_stop);

    network_ptr network_;
    handshake_ptr handshake_;
    blockchain_ptr chain_;
    channel_ptr node_;
};

typedef std::shared_ptr pollapp_ptr;

pollapp::pollapp()
{
    network_ = std::make_shared();
    handshake_ = std::make_shared();
    chain_ = std::make_shared("database/");
}

void pollapp::start(std::string hostname, unsigned int port)
{
    handshake_->connect(network_, "localhost", 8333,
        std::bind(&pollapp::handle_connect, shared_from_this(), _1, _2));
}

void pollapp::handle_connect(const std::error_code& ec, channel_ptr node)
{
    if (ec)
    {
        log_fatal() << ec.message();
        return;
    }
    node_ = node;
    chain_->fetch_block_locator(
        std::bind(&pollapp::initial_ask_blocks, shared_from_this(), _1, _2));
}

void handle_send_packet(const std::error_code& ec)
{
    if (ec)
        log_error() << ec.message();
}

void pollapp::initial_ask_blocks(const std::error_code& ec,
    const message::block_locator& loc)
{
    if (ec)
    {
        log_fatal() << ec.message();
        return;
    }
    node_->subscribe_inventory(
        std::bind(&pollapp::recv_inv, shared_from_this(), _1, _2));
    node_->subscribe_block(
        std::bind(&pollapp::recv_blk, shared_from_this(), _1, _2));
    ask_blocks(ec, loc, null_hash);
}

void pollapp::recv_inv(const std::error_code& ec,
    const message::inventory& packet)
{
    if (ec)
    {
        log_fatal() << ec.message();
        return;
    }
    message::get_data getdata;
    for (const message::inventory_vector& ivv: packet.inventories)
    {
        if (ivv.type != message::inventory_type::block)
            continue;
        getdata.inventories.push_back(ivv);
    }
    node_->send(getdata, handle_send_packet);
    // Re-subscribe
    node_->subscribe_inventory(
        std::bind(&pollapp::recv_inv, shared_from_this(), _1, _2));
}

void pollapp::recv_blk(const std::error_code& ec,
    const message::block& blk)
{
    if (ec)
    {
        log_fatal() << ec.message();
        return;
    }
    chain_->store(blk,
        std::bind(&pollapp::handle_store, shared_from_this(),
            _1, _2, hash_block_header(blk)));
    // Re-subscribe
    node_->subscribe_block(
        std::bind(&pollapp::recv_blk, shared_from_this(), _1, _2));
}

void pollapp::handle_store(const std::error_code& ec, block_info info,
    const hash_digest& block_hash)
{
    if (ec)
    {
        log_fatal() << ec.message();
        return;
    }
    switch (info.status)
    {
        case block_status::orphan:
            chain_->fetch_block_locator(
                std::bind(&pollapp::ask_blocks, shared_from_this(),
                    _1, _2, block_hash));
            break;

        case block_status::rejected:
            log_error() << "Rejected block " << pretty_hex(block_hash);
            break;

        case block_status::confirmed:
            log_debug() << "block #" << info.depth;
            break;
    }
}

void pollapp::ask_blocks(const std::error_code& ec,
    const message::block_locator& loc, const hash_digest& hash_stop)
{
    if (ec)
    {
        log_fatal() << ec.message();
        return;
    }
    message::get_blocks packet;
    packet.locator_start_hashes = loc;
    packet.hash_stop = hash_stop;
    node_->send(packet, std::bind(&handle_send_packet, _1));
}

int main(int argc, const char** argv)
{
    bdb_blockchain::setup("database/");

    pollapp_ptr app = std::make_shared();
    app->start("localhost", 8333);
    // Wait for CTRL-D
    while (true)
    {
        char n;
        std::cin >> n;
        if (std::cin.eof())
            break;
    }
    return 0;
}