bool leveldb_chain_keeper::clear_transaction_data(
leveldb_transaction_batch& batch, const transaction_type& remove_tx)
{
const hash_digest& tx_hash = hash_transaction(remove_tx);
batch.tx.Delete(slice(tx_hash));
// Remove spends
// ... spends don't exist for coinbase txs.
if (!is_coinbase(remove_tx))
for (uint32_t input_index = 0; input_index < remove_tx.inputs.size();
++input_index)
{
const transaction_input_type& input =
remove_tx.inputs[input_index];
// We could check if the spend matches the inpoint for safety.
//const input_point inpoint{tx_hash, input_index};
// Recreate the key...
data_chunk spent_key = create_spent_key(input.previous_output);
// ... Perform the delete.
batch.spend.Delete(slice(spent_key));
}
// Remove addresses
for (uint32_t output_index = 0; output_index < remove_tx.outputs.size();
++output_index)
{
const transaction_output_type& output =
remove_tx.outputs[output_index];
if (!remove_address(batch.addr,
output.output_script, {tx_hash, output_index}))
return false;
}
return true;
}
OutputInputIdentification::OutputInputIdentification(
const address_parse_info* _a,
const secret_key* _v,
const transaction* _tx)
: total_received {0}, mixin_no {0}
{
address_info = _a;
viewkey = _v;
tx = _tx;
tx_hash = get_transaction_hash(*tx);
tx_pub_key = xmreg::get_tx_pub_key_from_received_outs(*tx);
tx_is_coinbase = is_coinbase(*tx);
is_rct = (tx->version == 2);
if (is_rct)
{
rct_type = tx->rct_signatures.type;
}
if (!generate_key_derivation(tx_pub_key, *viewkey, derivation))
{
cerr << "Cant get derived key for: " << "\n"
<< "pub_tx_key: " << get_tx_pub_key_str() << " and "
<< "prv_view_key" << viewkey << endl;
throw OutputInputIdentificationException("Cant get derived key for a tx");
}
}
bool leveldb_validate_block::orphan_is_spent(
const output_point& previous_output,
size_t skip_tx, size_t skip_input)
{
// TODO factor this to look nicer
for (size_t orphan_iter = 0; orphan_iter <= orphan_index_; ++orphan_iter)
{
const block_type& orphan_block =
orphan_chain_[orphan_iter]->actual();
// Skip coinbase
BITCOIN_ASSERT(orphan_block.transactions.size() >= 1);
BITCOIN_ASSERT(is_coinbase(orphan_block.transactions[0]));
for (size_t tx_index = 0; tx_index < orphan_block.transactions.size();
++tx_index)
{
const transaction_type& orphan_tx =
orphan_block.transactions[tx_index];
for (size_t input_index = 0; input_index < orphan_tx.inputs.size();
++input_index)
{
const transaction_input_type& orphan_input =
orphan_tx.inputs[input_index];
if (orphan_iter == orphan_index_ && tx_index == skip_tx &&
input_index == skip_input)
{
continue;
}
else if (orphan_input.previous_output == previous_output)
return true;
}
}
}
return false;
}
bool bdb_common::save_transaction(txn_guard_ptr txn, uint32_t block_depth,
uint32_t tx_index, const hash_digest& tx_hash,
const message::transaction& block_tx)
{
if (dupli_save(txn, tx_hash, block_depth, tx_index))
return true;
// Actually add block
protobuf::Transaction proto_tx = transaction_to_protobuf(block_tx);
proto_tx.set_is_coinbase(is_coinbase(block_tx));
// Add parent block to transaction
protobuf::Transaction_BlockPointer* proto_parent = proto_tx.add_parent();
proto_parent->set_depth(block_depth);
proto_parent->set_index(tx_index);
// Save tx to bdb
std::ostringstream oss;
if (!proto_tx.SerializeToOstream(&oss))
return false;
readable_data_type key, value;
key.set(tx_hash);
value.set(oss.str());
// Checks for duplicates first
if (db_txs_->put(txn->get(), key.get(), value.get(), DB_NOOVERWRITE) != 0)
return false;
if (is_coinbase(block_tx))
return true;
for (uint32_t input_index = 0; input_index < block_tx.inputs.size();
++input_index)
{
const message::transaction_input& input =
block_tx.inputs[input_index];
const message::input_point inpoint{tx_hash, input_index};
if (!mark_spent_outputs(txn, input.previous_output, inpoint))
return false;
}
for (uint32_t output_index = 0; output_index < block_tx.outputs.size();
++output_index)
{
const message::transaction_output& output =
block_tx.outputs[output_index];
if (!add_address(txn, output.output_script, {tx_hash, output_index}))
return false;
}
return true;
}
bool leveldb_common::save_transaction(leveldb_transaction_batch& batch,
uint32_t block_height, uint32_t tx_index,
const hash_digest& tx_hash, const transaction_type& block_tx)
{
if (duplicate_exists(tx_hash, block_height, tx_index))
return true;
data_chunk tx_data(8 + satoshi_raw_size(block_tx));
// Serialize tx.
auto serial = make_serializer(tx_data.begin());
serial.write_4_bytes(block_height);
serial.write_4_bytes(tx_index);
// Actual tx data.
auto end_iter = satoshi_save(block_tx, serial.iterator());
BITCOIN_ASSERT(
std::distance(tx_data.begin(), end_iter) ==
8 + satoshi_raw_size(block_tx));
// Save tx to leveldb
batch.tx.Put(slice(tx_hash), slice(tx_data));
// Add inputs to spends database.
// Coinbase inputs do not spend anything.
if (!is_coinbase(block_tx))
for (uint32_t input_index = 0; input_index < block_tx.inputs.size();
++input_index)
{
const transaction_input_type& input =
block_tx.inputs[input_index];
const input_point inpoint{tx_hash, input_index};
if (!mark_spent_outputs(batch.spend,
input.previous_output, inpoint))
return false;
if (!add_debit(batch.debit,
input, {tx_hash, input_index}, block_height))
return false;
}
// Save address -> output mappings.
for (uint32_t output_index = 0; output_index < block_tx.outputs.size();
++output_index)
{
const transaction_output_type& output =
block_tx.outputs[output_index];
if (!add_credit(batch.credit,
output, {tx_hash, output_index}, block_height))
return false;
}
return true;
}
bool leveldb_common::save_transaction(leveldb_transaction_batch& batch,
uint32_t block_height, uint32_t tx_index,
const hash_digest& tx_hash, const transaction_type& block_tx)
{
if (is_special_duplicate(block_height, tx_index))
return true;
data_chunk tx_data(8 + satoshi_raw_size(block_tx));
// Serialize tx.
auto serial = make_serializer(tx_data.begin());
serial.write_4_bytes(block_height);
serial.write_4_bytes(tx_index);
// Actual tx data.
auto end_iter = satoshi_save(block_tx, serial.iterator());
BITCOIN_ASSERT(
tx_data.begin() + 8 + satoshi_raw_size(block_tx) == end_iter);
// Save tx to leveldb
batch.tx.Put(slice(tx_hash), slice(tx_data));
// Add inputs to spends database.
// Coinbase inputs do not spend anything.
if (!is_coinbase(block_tx))
for (uint32_t input_index = 0; input_index < block_tx.inputs.size();
++input_index)
{
const transaction_input_type& input =
block_tx.inputs[input_index];
const input_point inpoint{tx_hash, input_index};
if (!mark_spent_outputs(batch.spend,
input.previous_output, inpoint))
return false;
if (!add_debit(batch.debit,
input, {tx_hash, input_index}, block_height))
return false;
}
// A stack of size 1. Keep the stealth_data from
// one iteration to the next.
data_chunk stealth_data_store;
auto unload_stealth_store = [&]()
{
return std::move(stealth_data_store);
};
// Save address -> output mappings.
for (uint32_t output_index = 0; output_index < block_tx.outputs.size();
++output_index)
{
const transaction_output_type& output =
block_tx.outputs[output_index];
// If a stealth output then skip processing.
if (process_stealth_output_info(output, stealth_data_store))
continue;
data_chunk stealth_data = unload_stealth_store();
// Try to extract an address.
payment_address address;
if (!extract(address, output.script))
continue;
// Process this output.
if (!stealth_data.empty())
add_stealth_info(stealth_data, address, tx_hash, *db_stealth_);
if (!add_credit(batch.credit, address, output.value,
{tx_hash, output_index}, block_height))
return false;
}
return true;
}
tuple<string, string, string>
CurrentBlockchainStatus::construct_output_rct_field(
const uint64_t global_amount_index,
const uint64_t out_amount)
{
transaction random_output_tx;
uint64_t output_idx_in_tx;
// we got random outputs, but now we need to get rct data of those
// outputs, because by default frontend created ringct txs.
if (!CurrentBlockchainStatus::get_tx_with_output(
global_amount_index, out_amount,
random_output_tx, output_idx_in_tx))
{
cerr << "cant get random output transaction" << endl;
return make_tuple(string {}, string {}, string {});
}
//cout << pod_to_hex(out.out_key) << endl;
//cout << pod_to_hex(get_transaction_hash(random_output_tx)) << endl;
//cout << output_idx_in_tx << endl;
// placeholder variable for ringct outputs info
// that we need to save in database
string rtc_outpk;
string rtc_mask(64, '0');
string rtc_amount(64, '0');
if (random_output_tx.version > 1 && !is_coinbase(random_output_tx))
{
rtc_outpk = pod_to_hex(random_output_tx.rct_signatures.outPk[output_idx_in_tx].mask);
rtc_mask = pod_to_hex(random_output_tx.rct_signatures.ecdhInfo[output_idx_in_tx].mask);
rtc_amount = pod_to_hex(random_output_tx.rct_signatures.ecdhInfo[output_idx_in_tx].amount);
}
else
{
// for non ringct txs, we need to take it rct amount commitment
// and sent to the frontend. the mask is zero mask for those,
// as frontend will produce identy mask autmatically for non-ringct outputs
output_data_t od = get_output_key(out_amount, global_amount_index);
rtc_outpk = pod_to_hex(od.commitment);
if (is_coinbase(random_output_tx)) // commenting this out. think its not needed.
{ // as this function provides keys for mixin outputs
// not the ones we actually spend.
// ringct coinbase txs are special. they have identity mask.
// as suggested by this code:
// https://github.com/monero-project/monero/blob/eacf2124b6822d088199179b18d4587404408e0f/src/wallet/wallet2.cpp#L893
// https://github.com/monero-project/monero/blob/master/src/blockchain_db/blockchain_db.cpp#L100
// rtc_mask = pod_to_hex(rct::identity());
}
}
return make_tuple(rtc_outpk, rtc_mask, rtc_amount);
};
bool
CurrentBlockchainStatus::search_if_payment_made(
const string& payment_id_str,
const uint64_t& desired_amount,
string& tx_hash_with_payment)
{
vector<pair<uint64_t, transaction>> mempool_transactions = get_mempool_txs();
uint64_t current_blockchain_height = current_height;
vector<transaction> txs_to_check;
for (auto& mtx: mempool_transactions)
{
txs_to_check.push_back(mtx.second);
}
// apend txs in last to blocks into the txs_to_check vector
for (uint64_t blk_i = current_blockchain_height - 10;
blk_i <= current_blockchain_height;
++blk_i)
{
// get block cointaining this tx
block blk;
if (!get_block(blk_i, blk)) {
cerr << "Cant get block of height: " + to_string(blk_i) << endl;
return false;
}
list <cryptonote::transaction> blk_txs;
if (!get_block_txs(blk, blk_txs))
{
cerr << "Cant get transactions in block: " << to_string(blk_i) << endl;
return false;
}
// combine mempool txs and txs from given number of
// last blocks
txs_to_check.insert(txs_to_check.end(), blk_txs.begin(), blk_txs.end());
}
for (transaction& tx: txs_to_check)
{
if (is_coinbase(tx))
{
// not interested in coinbase txs
continue;
}
string tx_payment_id_str = get_payment_id_as_string(tx);
// we are interested only in txs with encrypted payments id8
// they have length of 16 characters.
if (tx_payment_id_str.length() != 16)
{
continue;
}
// we have some tx with encrypted payment_id8
// need to decode it using tx public key, and our
// private view key, before we can comapre it is
// what we are after.
crypto::hash8 encrypted_payment_id8;
if (!hex_to_pod(tx_payment_id_str, encrypted_payment_id8))
{
cerr << "failed parsing hex to pod for encrypted_payment_id8" << '\n';
}
// decrypt the encrypted_payment_id8
public_key tx_pub_key = xmreg::get_tx_pub_key_from_received_outs(tx);
// public transaction key is combined with our viewkey
// to create, so called, derived key.
key_derivation derivation;
if (!generate_key_derivation(tx_pub_key, import_payment_viewkey, derivation))
{
cerr << "Cant get derived key for: " << "\n"
<< "pub_tx_key: " << tx_pub_key << " and "
<< "prv_view_key" << import_payment_viewkey << endl;
return false;
}
// decrypt encrypted payment id, as used in integreated addresses
crypto::hash8 decrypted_payment_id8 = encrypted_payment_id8;
if (decrypted_payment_id8 != null_hash8)
{
if (!decrypt_payment_id(decrypted_payment_id8, tx_pub_key, import_payment_viewkey))
{
cerr << "Cant decrypt decrypted_payment_id8: "
<< pod_to_hex(decrypted_payment_id8) << "\n";
}
}
string decrypted_tx_payment_id_str = pod_to_hex(decrypted_payment_id8);
// check if decrypted payment id matches what we have stored
// in mysql.
if (payment_id_str != decrypted_tx_payment_id_str)
{
// check tx having specific payment id only
continue;
}
// if everything ok with payment id, we proceed with
// checking if the amount transfered is correct.
// for each output, in a tx, check if it belongs
// to the given account of specific address and viewkey
// <public_key , amount , out idx>
vector<tuple<txout_to_key, uint64_t, uint64_t>> outputs;
outputs = get_ouputs_tuple(tx);
string tx_hash_str = pod_to_hex(get_transaction_hash(tx));
uint64_t total_received {0};
for (auto& out: outputs)
{
txout_to_key txout_k = std::get<0>(out);
uint64_t amount = std::get<1>(out);
uint64_t output_idx_in_tx = std::get<2>(out);
// get the tx output public key
// that normally would be generated for us,
// if someone had sent us some xmr.
public_key generated_tx_pubkey;
derive_public_key(derivation,
output_idx_in_tx,
import_payment_address.m_spend_public_key,
generated_tx_pubkey);
// check if generated public key matches the current output's key
bool mine_output = (txout_k.key == generated_tx_pubkey);
// if mine output has RingCT, i.e., tx version is 2
// need to decode its amount. otherwise its zero.
if (mine_output && tx.version == 2)
{
// initialize with regular amount
uint64_t rct_amount = amount;
// cointbase txs have amounts in plain sight.
// so use amount from ringct, only for non-coinbase txs
if (!is_coinbase(tx))
{
bool r;
r = decode_ringct(tx.rct_signatures,
tx_pub_key,
import_payment_viewkey,
output_idx_in_tx,
tx.rct_signatures.ecdhInfo[output_idx_in_tx].mask,
rct_amount);
if (!r)
{
cerr << "Cant decode ringCT!" << endl;
throw TxSearchException("Cant decode ringCT!");
}
amount = rct_amount;
}
} // if (mine_output && tx.version == 2)
if (mine_output)
{
total_received += amount;
}
}
cout << " - payment id check in tx: "
<< tx_hash_str
<< " found: " << total_received << endl;
if (total_received >= desired_amount)
{
// the payment has been made.
tx_hash_with_payment = tx_hash_str;
return true;
}
}
return false;
}