// Validate script consensus conformance based on flags provided.
static bool check_consensus(const script& prevout_script,
const transaction& current_tx, size_t input_index,
uint32_t options)
{
BITCOIN_ASSERT(input_index <= max_uint32);
BITCOIN_ASSERT(input_index < current_tx.inputs.size());
const auto input_index32 = static_cast<uint32_t>(input_index);
const auto bip16_enabled = ((options & validation_options::p2sh) != 0);
#ifdef WITH_CONSENSUS
using namespace bc::consensus;
const auto previous_output_script = prevout_script.to_data(false);
data_chunk current_transaction = current_tx.to_data();
const auto flags = (bip16_enabled ? verify_flags_p2sh : verify_flags_none);
const auto result = verify_script(current_transaction.data(),
current_transaction.size(), previous_output_script.data(),
previous_output_script.size(), input_index32, flags);
const auto valid = (result == verify_result::verify_result_eval_true);
#else
// Copy the const prevout script so it can be run.
auto previous_output_script = prevout_script;
const auto& current_input_script = current_tx.inputs[input_index].script;
const auto valid = script::verify(current_input_script,
previous_output_script, current_tx, input_index32, bip16_enabled);
#endif
if (!valid)
log::warning(LOG_VALIDATE) << "Invalid transaction ["
<< encode_hash(current_tx.hash()) << "]";
return valid;
}
// Validate script consensus conformance based on flags provided.
bool validate_transaction::check_consensus(const script& prevout_script,
const transaction& current_tx, size_t input_index, uint32_t flags)
{
BITCOIN_ASSERT(input_index <= max_uint32);
BITCOIN_ASSERT(input_index < current_tx.inputs.size());
const auto input_index32 = static_cast<uint32_t>(input_index);
#ifdef WITH_CONSENSUS
using namespace bc::consensus;
const auto previous_output_script = prevout_script.to_data(false);
data_chunk current_transaction = current_tx.to_data();
// Convert native flags to libbitcoin-consensus flags.
uint32_t consensus_flags = verify_flags_none;
if ((flags & script_context::bip16_enabled) != 0)
consensus_flags |= verify_flags_p2sh;
if ((flags & script_context::bip65_enabled) != 0)
consensus_flags |= verify_flags_checklocktimeverify;
if ((flags & script_context::bip66_enabled) != 0)
consensus_flags |= verify_flags_dersig;
const auto result = verify_script(current_transaction.data(),
current_transaction.size(), previous_output_script.data(),
previous_output_script.size(), input_index32, consensus_flags);
const auto valid = (result == verify_result::verify_result_eval_true);
#else
// Copy the const prevout script so it can be run.
auto previous_output_script = prevout_script;
const auto& current_input_script = current_tx.inputs[input_index].script;
const auto valid = script::verify(current_input_script,
previous_output_script, current_tx, input_index32, flags);
#endif
if (!valid)
log::warning(LOG_BLOCKCHAIN)
<< "Invalid transaction ["
<< encode_hash(current_tx.hash()) << "]";
return valid;
}
// TODO: cache transaction wire serialization.
code validate_input::verify_script(const transaction& tx, uint32_t input_index,
uint32_t forks, bool use_libconsensus)
{
if (!use_libconsensus)
return script::verify(tx, input_index, forks);
BITCOIN_ASSERT(input_index < tx.inputs().size());
const auto& prevout = tx.inputs()[input_index].previous_output().metadata;
const auto script_data = prevout.cache.script().to_data(false);
const auto prevout_value = prevout.cache.value();
const auto tx_data = tx.to_data(true, true);
// libconsensus
return convert_result(consensus::verify_script(tx_data.data(),
tx_data.size(), script_data.data(), script_data.size(), prevout_value,
input_index, convert_flags(forks)));
}
