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;
}
// Optimize reads by short-circuiting what is unnecessary.
// Invalid returns are conflated with skipped, but are store only.
bool stealth_record::from_data(reader& source, size_t start_height,
const binary& filter)
{
height_ = source.read_4_bytes_little_endian();
if (height_ < start_height)
{
reset();
source.skip(serialized_size(false) - sizeof(uint32_t));
return false;
}
prefix_ = source.read_4_bytes_little_endian();
if (!filter.is_prefix_of(prefix_))
{
reset();
source.skip(serialized_size(false) - 2 * sizeof(uint32_t));
return false;
}
unsigned_ephemeral_ = source.read_hash();
public_key_hash_ = source.read_short_hash();
transaction_hash_ = source.read_hash();
if (!source)
reset();
return source;
}
// 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 heading::from_data(reader& source)
{
reset();
magic = source.read_4_bytes_little_endian();
command = source.read_fixed_string(command_size);
payload_size = source.read_4_bytes_little_endian();
checksum = source.read_4_bytes_little_endian();
if (!source)
reset();
return source;
}
bool point::from_data(reader& source, bool wire)
{
reset();
valid_ = true;
hash_ = source.read_hash();
if (wire)
{
index_ = source.read_4_bytes_little_endian();
}
else
{
index_ = source.read_2_bytes_little_endian();
// Convert 16 bit sentinel to 32 bit sentinel.
if (index_ == max_uint16)
index_ = null_index;
}
if (!source)
reset();
return source;
}
bool transaction::from_data(reader& source)
{
auto result = true;
reset();
version = source.read_4_bytes_little_endian();
result = source;
if (result)
{
uint64_t tx_in_count = source.read_variable_uint_little_endian();
result = source;
for (uint64_t i = 0; (i < tx_in_count) && result; ++i)
{
inputs.emplace_back();
result = inputs.back().from_data(source);
}
}
if (result)
{
auto tx_out_count = source.read_variable_uint_little_endian();
result = source;
for (uint64_t i = 0; (i < tx_out_count) && result; ++i)
{
outputs.emplace_back();
result = outputs.back().from_data(source);
}
}
if (result)
{
locktime = source.read_4_bytes_little_endian();
result = source;
}
if (!result)
reset();
return result;
}
bool point::from_data(reader& source)
{
auto result = true;
reset();
hash = source.read_hash();
index = source.read_4_bytes_little_endian();
result = source;
if (!result)
reset();
return result;
}
bool alert_payload::from_data(reader& source)
{
reset();
version = source.read_4_bytes_little_endian();
relay_until = source.read_8_bytes_little_endian();
expiration = source.read_8_bytes_little_endian();
id = source.read_4_bytes_little_endian();
cancel = source.read_4_bytes_little_endian();
uint64_t set_cancel_size = source.read_variable_uint_little_endian();
for (uint64_t i = 0; i < set_cancel_size && source; i++)
set_cancel.push_back(source.read_4_bytes_little_endian());
min_version = source.read_4_bytes_little_endian();
max_version = source.read_4_bytes_little_endian();
uint64_t set_sub_version_size = source.read_variable_uint_little_endian();
for (uint64_t i = 0; i < set_sub_version_size && source; i++)
set_sub_version.push_back(source.read_string());
priority = source.read_4_bytes_little_endian();
comment = source.read_string();
status_bar = source.read_string();
reserved = source.read_string();
if (!source)
reset();
return source;
}
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;
}
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;
}
}
