bool version::from_data(reader& source)
{
reset();
value = source.read_4_bytes_little_endian();
services = source.read_8_bytes_little_endian();
timestamp = source.read_8_bytes_little_endian();
auto result = static_cast<bool>(source);
if (result)
result = address_me.from_data(source, false);
if (result && (value >= 106))
{
result = address_you.from_data(source, false);
nonce = source.read_8_bytes_little_endian();
user_agent = source.read_string();
if (value >= 209)
start_height = source.read_4_bytes_little_endian();
// The satoshi client treats 209 as the "initial protocol version"
// and disconnects peers below 31800 (for getheaders support).
if (value >= 70001)
relay = (source.read_byte() != 0);
result &= source;
}
if (!result)
reset();
return result;
}
bool operation::from_data(reader& source)
{
reset();
const auto byte = source.read_byte();
auto result = static_cast<bool>(source);
auto op_code = static_cast<opcode>(byte);
if (byte == 0 && op_code != opcode::zero)
return false;
code = ((0 < byte && byte <= 75) ? opcode::special : op_code);
if (operation::must_read_data(code))
{
uint32_t size;
read_opcode_data_size(size, code, byte, source);
data = source.read_data(size);
result = (source && (data.size() == size));
}
if (!result)
reset();
return result;
}
// Avoid point reuse due to affect on store tx serialization.
bool payment_record::from_data(reader& source, bool wire)
{
valid_ = true;
output_ = (source.read_byte() == 1);
if (wire)
{
height_ = source.read_4_bytes_little_endian();
link_ = unlinked;
hash_ = source.read_hash();
index_ = source.read_4_bytes_little_endian();
}
else
{
height_ = 0;
link_ = source.read_8_bytes_little_endian();
hash_ = null_hash;
index_ = source.read_2_bytes_little_endian();
// Convert 16 bit sentinel to 32 bit sentinel.
if (index_ == max_uint16)
index_ = point::null_index;
}
data_ = source.read_8_bytes_little_endian();
if (!source)
reset();
return source;
}
bool header::from_data(uint32_t version, reader& source)
{
if (!chain::header::from_data(source))
return false;
// The header message must trail a zero byte (yes, it's stoopid).
// bitcoin.org/en/developer-reference#headers
if (version != version::level::canonical && source.read_byte() != 0x00)
source.invalidate();
if (!source)
reset();
return source;
}
bool send_compact::from_data(uint32_t version,
reader& source)
{
reset();
const auto mode = source.read_byte();
if (mode > 1)
source.invalidate();
high_bandwidth_mode_ = (mode == 1);
this->version_ = source.read_8_bytes_little_endian();
if (version < send_compact::version_minimum)
source.invalidate();
if (!source)
reset();
return source;
}
bool operation::read_opcode_data_size(uint32_t& count, opcode code,
uint8_t raw_byte, reader& source)
{
switch (code)
{
case opcode::special:
count = raw_byte;
return true;
case opcode::pushdata1:
count = source.read_byte();
return true;
case opcode::pushdata2:
count = source.read_2_bytes_little_endian();
return true;
case opcode::pushdata4:
count = source.read_4_bytes_little_endian();
return true;
default:
return false;
}
}
bool reject::from_data(reader& source)
{
bool result = 0;
reset();
message = source.read_string();
code = error_code_from_byte(source.read_byte());
reason = source.read_string();
if ((message == chain::block::command) ||
(message == chain::transaction::command))
{
data = source.read_hash();
}
result = source;
if (!result)
reset();
return result;
}
bool filter_load::from_data(reader& source)
{
bool result = false;
reset();
uint64_t filter_size = source.read_variable_uint_little_endian();
result = source;
if (result)
{
filter = source.read_data(filter_size);
hash_functions = source.read_4_bytes_little_endian();
tweak = source.read_4_bytes_little_endian();
flags = source.read_byte();
result = source && (filter.size() == filter_size);
}
if (!result)
reset();
return result;
}
