bool db_tx::read_disk_transaction(
const sha256 & hash, transaction & tx, transaction_index & index
)
{
assert(globals::instance().is_client() == false);
tx.set_null();
if (read_transaction_index(hash, index) == false)
{
return false;
}
return tx.read_from_disk(index.get_transaction_position());
}
bool db_tx::read_transaction_index(
const sha256 & hash, transaction_index & index
)
{
index.set_null();
std::string key_tx = "tx";
data_buffer buffer;
buffer.write_var_int(key_tx.size());
buffer.write_bytes(key_tx.data(), key_tx.size());
buffer.write_sha256(hash);
return read(buffer, index);
}
bool transaction::read_from_disk(
db_tx & tx_db, const point_out & previous_out, transaction_index & tx_index
)
{
set_null();
if (
tx_db.read_transaction_index(
previous_out.get_hash(), tx_index) == false
)
{
log_debug(
"Transaction failed to read from disk, read transaction index "
"failed, previous out = " <<
previous_out.get_hash().to_string().substr(0, 20) << "."
);
return false;
}
if (read_from_disk(tx_index.get_transaction_position()) == false)
{
log_debug(
"Transaction failed to read from disk, read from disk failed."
);
return false;
}
if (previous_out.n() >= m_transactions_out.size())
{
log_debug(
"Transaction failed to read from disk, n is greater than outputs."
);
set_null();
return false;
}
return true;
}
