bool get_payment_id_from_tx_extra_nonce(const blobdata& extra_nonce, crypto::hash& payment_id) {
if (sizeof(crypto::hash) + 1 != extra_nonce.size())
return false;
if (TX_EXTRA_NONCE_PAYMENT_ID != extra_nonce[0])
return false;
payment_id = *reinterpret_cast<const crypto::hash*>(extra_nonce.data() + 1);
return true;
}
//---------------------------------------------------------------
bool parse_and_validate_tx_from_blob(const blobdata& tx_blob, transaction& tx, crypto::hash& tx_hash, crypto::hash& tx_prefix_hash)
{
std::stringstream ss;
ss << tx_blob;
binary_archive<false> ba(ss);
bool r = ::serialization::serialize(ba, tx);
CHECK_AND_ASSERT_MES(r, false, "Failed to parse transaction from blob");
//TODO: validate tx
crypto::cn_fast_hash(tx_blob.data(), tx_blob.size(), tx_hash);
get_transaction_prefix_hash(tx, tx_prefix_hash);
return true;
}
//---------------------------------------------------------------
bool add_extra_nonce_to_tx_extra(std::vector<uint8_t>& tx_extra, const blobdata& extra_nonce)
{
CHECK_AND_ASSERT_MES(extra_nonce.size() <= TX_EXTRA_NONCE_MAX_COUNT, false, "extra nonce could be 255 bytes max");
size_t start_pos = tx_extra.size();
tx_extra.resize(tx_extra.size() + 2 + extra_nonce.size());
//write tag
tx_extra[start_pos] = TX_EXTRA_NONCE;
//write len
++start_pos;
tx_extra[start_pos] = static_cast<uint8_t>(extra_nonce.size());
//write data
++start_pos;
memcpy(&tx_extra[start_pos], extra_nonce.data(), extra_nonce.size());
return true;
}
bool parse_and_validate_tx_from_blob(const blobdata& tx_blob, Transaction& tx, crypto::hash& tx_hash, crypto::hash& tx_prefix_hash) {
std::stringstream ss;
ss << tx_blob;
binary_archive<false> ba(ss);
bool r = ::serialization::serialize(ba, tx);
if (!r) {
return false;
}
//TODO: validate tx
crypto::cn_fast_hash(tx_blob.data(), tx_blob.size(), tx_hash);
get_transaction_prefix_hash(tx, tx_prefix_hash);
return true;
}
bool add_extra_nonce_to_tx_extra(std::vector<uint8_t>& tx_extra, const blobdata& extra_nonce) {
if (extra_nonce.size() > TX_EXTRA_NONCE_MAX_COUNT) {
return false;
}
size_t start_pos = tx_extra.size();
tx_extra.resize(tx_extra.size() + 2 + extra_nonce.size());
//write tag
tx_extra[start_pos] = TX_EXTRA_NONCE;
//write len
++start_pos;
tx_extra[start_pos] = static_cast<uint8_t>(extra_nonce.size());
//write data
++start_pos;
memcpy(&tx_extra[start_pos], extra_nonce.data(), extra_nonce.size());
return true;
}
//---------------------------------------------------------------
void get_blob_hash(const blobdata& blob, crypto::hash& res)
{
cn_fast_hash(blob.data(), blob.size(), res);
}
