/**
* Check if given output (specified by output_index)
* belongs is ours based
* on our private view key and public spend key
*/
bool
is_output_ours(const size_t& output_index,
const transaction& tx,
const secret_key& private_view_key,
const public_key& public_spend_key)
{
// get transaction's public key
public_key pub_tx_key = get_tx_pub_key_from_extra(tx);
// check if transaction has valid public key
// if no, then skip
if (pub_tx_key == null_pkey)
{
return false;
}
// public transaction key is combined with our viewkey
// to create, so called, derived key.
key_derivation derivation;
if (!generate_key_derivation(pub_tx_key, private_view_key, derivation))
{
cerr << "Cant get dervied key for: " << "\n"
<< "pub_tx_key: " << pub_tx_key << " and "
<< "prv_view_key" << private_view_key << endl;
return false;
}
// get the tx output public key
// that normally would be generated for us,
// if someone had sent us some xmr.
public_key pubkey;
derive_public_key(derivation,
output_index,
public_spend_key,
pubkey);
//cout << "\n" << tx.vout.size() << " " << output_index << endl;
// get tx output public key
const txout_to_key tx_out_to_key
= boost::get<txout_to_key>(tx.vout[output_index].target);
if (tx_out_to_key.key == pubkey)
{
return true;
}
return false;
}
bool generate_key_image_helper(const AccountKeys& ack, const PublicKey& tx_public_key, size_t real_output_index, KeyPair& in_ephemeral, KeyImage& ki) {
KeyDerivation recv_derivation;
bool r = generate_key_derivation(tx_public_key, ack.viewSecretKey, recv_derivation);
assert(r && "key image helper: failed to generate_key_derivation");
if (!r) {
return false;
}
r = derive_public_key(recv_derivation, real_output_index, ack.address.spendPublicKey, in_ephemeral.publicKey);
assert(r && "key image helper: failed to derive_public_key");
if (!r) {
return false;
}
derive_secret_key(recv_derivation, real_output_index, ack.spendSecretKey, in_ephemeral.secretKey);
generate_key_image(in_ephemeral.publicKey, in_ephemeral.secretKey, ki);
return true;
}
bool is_out_to_acc(const AccountKeys& acc, const KeyOutput& out_key, const KeyDerivation& derivation, size_t keyIndex) {
PublicKey pk;
derive_public_key(derivation, keyIndex, acc.address.spendPublicKey, pk);
return pk == out_key.key;
}
bool constructTransaction(
const AccountKeys& sender_account_keys,
const std::vector<TransactionSourceEntry>& sources,
const std::vector<TransactionDestinationEntry>& destinations,
std::vector<uint8_t> extra,
Transaction& tx,
uint64_t unlock_time,
Logging::ILogger& log) {
LoggerRef logger(log, "construct_tx");
tx.inputs.clear();
tx.outputs.clear();
tx.signatures.clear();
tx.version = CURRENT_TRANSACTION_VERSION;
tx.unlockTime = unlock_time;
tx.extra = extra;
KeyPair txkey = generateKeyPair();
addTransactionPublicKeyToExtra(tx.extra, txkey.publicKey);
struct input_generation_context_data {
KeyPair in_ephemeral;
};
std::vector<input_generation_context_data> in_contexts;
uint64_t summary_inputs_money = 0;
//fill inputs
for (const TransactionSourceEntry& src_entr : sources) {
if (src_entr.realOutput >= src_entr.outputs.size()) {
logger(ERROR) << "real_output index (" << src_entr.realOutput << ")bigger than output_keys.size()=" << src_entr.outputs.size();
return false;
}
summary_inputs_money += src_entr.amount;
//KeyDerivation recv_derivation;
in_contexts.push_back(input_generation_context_data());
KeyPair& in_ephemeral = in_contexts.back().in_ephemeral;
KeyImage img;
if (!generate_key_image_helper(sender_account_keys, src_entr.realTransactionPublicKey, src_entr.realOutputIndexInTransaction, in_ephemeral, img))
return false;
//check that derived key is equal with real output key
if (!(in_ephemeral.publicKey == src_entr.outputs[src_entr.realOutput].second)) {
logger(ERROR) << "derived public key mismatch with output public key! " << ENDL << "derived_key:"
<< Common::podToHex(in_ephemeral.publicKey) << ENDL << "real output_public_key:"
<< Common::podToHex(src_entr.outputs[src_entr.realOutput].second);
return false;
}
//put key image into tx input
KeyInput input_to_key;
input_to_key.amount = src_entr.amount;
input_to_key.keyImage = img;
//fill outputs array and use relative offsets
for (const TransactionSourceEntry::OutputEntry& out_entry : src_entr.outputs) {
input_to_key.outputIndexes.push_back(out_entry.first);
}
input_to_key.outputIndexes = absolute_output_offsets_to_relative(input_to_key.outputIndexes);
tx.inputs.push_back(input_to_key);
}
// "Shuffle" outs
std::vector<TransactionDestinationEntry> shuffled_dsts(destinations);
std::sort(shuffled_dsts.begin(), shuffled_dsts.end(), [](const TransactionDestinationEntry& de1, const TransactionDestinationEntry& de2) { return de1.amount < de2.amount; });
uint64_t summary_outs_money = 0;
//fill outputs
size_t output_index = 0;
for (const TransactionDestinationEntry& dst_entr : shuffled_dsts) {
if (!(dst_entr.amount > 0)) {
logger(ERROR, BRIGHT_RED) << "Destination with wrong amount: " << dst_entr.amount;
return false;
}
KeyDerivation derivation;
PublicKey out_eph_public_key;
bool r = generate_key_derivation(dst_entr.addr.viewPublicKey, txkey.secretKey, derivation);
if (!(r)) {
logger(ERROR, BRIGHT_RED)
<< "at creation outs: failed to generate_key_derivation("
<< dst_entr.addr.viewPublicKey << ", " << txkey.secretKey << ")";
return false;
}
r = derive_public_key(derivation, output_index,
dst_entr.addr.spendPublicKey,
out_eph_public_key);
if (!(r)) {
logger(ERROR, BRIGHT_RED)
<< "at creation outs: failed to derive_public_key(" << derivation
<< ", " << output_index << ", " << dst_entr.addr.spendPublicKey
<< ")";
return false;
}
TransactionOutput out;
out.amount = dst_entr.amount;
KeyOutput tk;
tk.key = out_eph_public_key;
out.target = tk;
tx.outputs.push_back(out);
output_index++;
summary_outs_money += dst_entr.amount;
}
//check money
if (summary_outs_money > summary_inputs_money) {
logger(ERROR) << "Transaction inputs money (" << summary_inputs_money << ") less than outputs money (" << summary_outs_money << ")";
return false;
}
//generate ring signatures
Hash tx_prefix_hash;
getObjectHash(*static_cast<TransactionPrefix*>(&tx), tx_prefix_hash);
size_t i = 0;
for (const TransactionSourceEntry& src_entr : sources) {
std::vector<const PublicKey*> keys_ptrs;
for (const TransactionSourceEntry::OutputEntry& o : src_entr.outputs) {
keys_ptrs.push_back(&o.second);
}
tx.signatures.push_back(std::vector<Signature>());
std::vector<Signature>& sigs = tx.signatures.back();
sigs.resize(src_entr.outputs.size());
generate_ring_signature(tx_prefix_hash, boost::get<KeyInput>(tx.inputs[i]).keyImage, keys_ptrs,
in_contexts[i].in_ephemeral.secretKey, src_entr.realOutput, sigs.data());
i++;
}
return true;
}
bool isOutToKey(const Crypto::PublicKey& spendPublicKey, const Crypto::PublicKey& outKey, const Crypto::KeyDerivation& derivation, size_t keyIndex) {
Crypto::PublicKey pk;
derive_public_key(derivation, keyIndex, spendPublicKey, pk);
return pk == outKey;
}
void
OutputInputIdentification::identify_outputs()
{
// <public_key , amount , out idx>
vector<tuple<txout_to_key, uint64_t, uint64_t>> outputs;
outputs = get_ouputs_tuple(*tx);
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,
address_info->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);
//cout << "Chekcing output: " << pod_to_hex(txout_k.key) << " "
// << "mine_output: " << mine_output << endl;
// placeholder variable for ringct outputs info
// that we need to save in database
string rtc_outpk;
string rtc_mask;
string rtc_amount;
// 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 value
// for ringct, except coinbase, it will be 0
uint64_t rct_amount_val = amount;
// cointbase txs have amounts in plain sight.
// so use amount from ringct, only for non-coinbase txs
if (!tx_is_coinbase)
{
bool r;
// for ringct non-coinbase txs, these values are provided with txs.
// coinbase ringctx dont have this information. we will provide
// them only when needed, in get_unspent_outputs. So go there
// to see how we deal with ringct coinbase txs when we spent them
// go to CurrentBlockchainStatus::construct_output_rct_field
// to see how we deal with coinbase ringct that are used as mixins
rtc_outpk = pod_to_hex(tx->rct_signatures.outPk[output_idx_in_tx].mask);
rtc_mask = pod_to_hex(tx->rct_signatures.ecdhInfo[output_idx_in_tx].mask);
rtc_amount = pod_to_hex(tx->rct_signatures.ecdhInfo[output_idx_in_tx].amount);
rct::key mask = tx->rct_signatures.ecdhInfo[output_idx_in_tx].mask;
r = decode_ringct(tx->rct_signatures,
tx_pub_key,
*viewkey,
output_idx_in_tx,
mask,
rct_amount_val);
if (!r)
{
cerr << "Cant decode ringCT!" << endl;
throw OutputInputIdentificationException("Cant decode ringCT!");
}
amount = rct_amount_val;
}
} // if (mine_output && tx.version == 2)
if (mine_output)
{
string out_key_str = pod_to_hex(txout_k.key);
// found an output associated with the given address and viewkey
string msg = fmt::format("tx_hash: {:s}, output_pub_key: {:s}\n",
get_tx_hash_str(),
out_key_str);
cout << msg << endl;
total_received += amount;
identified_outputs.emplace_back(
output_info{
txout_k.key, amount, output_idx_in_tx,
rtc_outpk, rtc_mask, rtc_amount
});
} // if (mine_output)
} // for (const auto& out: outputs)
}
bool WalletManagerImpl::checkPayment(const std::string &address_text, const std::string &txid_text, const std::string &txkey_text, const std::string &daemon_address, uint64_t &received, uint64_t &height, std::string &error) const
{
error = "";
cryptonote::blobdata txid_data;
if(!epee::string_tools::parse_hexstr_to_binbuff(txid_text, txid_data))
{
error = tr("failed to parse txid");
return false;
}
crypto::hash txid = *reinterpret_cast<const crypto::hash*>(txid_data.data());
if (txkey_text.size() < 64 || txkey_text.size() % 64)
{
error = tr("failed to parse tx key");
return false;
}
crypto::secret_key tx_key;
cryptonote::blobdata tx_key_data;
if(!epee::string_tools::parse_hexstr_to_binbuff(txkey_text, tx_key_data))
{
error = tr("failed to parse tx key");
return false;
}
tx_key = *reinterpret_cast<const crypto::secret_key*>(tx_key_data.data());
bool testnet = address_text[0] != '4';
cryptonote::account_public_address address;
bool has_payment_id;
crypto::hash8 payment_id;
if(!cryptonote::get_account_integrated_address_from_str(address, has_payment_id, payment_id, testnet, address_text))
{
error = tr("failed to parse address");
return false;
}
cryptonote::COMMAND_RPC_GET_TRANSACTIONS::request req;
cryptonote::COMMAND_RPC_GET_TRANSACTIONS::response res;
req.txs_hashes.push_back(epee::string_tools::pod_to_hex(txid));
epee::net_utils::http::http_simple_client http_client;
if (!epee::net_utils::invoke_http_json_remote_command2(daemon_address + "/gettransactions", req, res, http_client) ||
(res.txs.size() != 1 && res.txs_as_hex.size() != 1))
{
error = tr("failed to get transaction from daemon");
return false;
}
cryptonote::blobdata tx_data;
bool ok;
if (res.txs.size() == 1)
ok = epee::string_tools::parse_hexstr_to_binbuff(res.txs.front().as_hex, tx_data);
else
ok = epee::string_tools::parse_hexstr_to_binbuff(res.txs_as_hex.front(), tx_data);
if (!ok)
{
error = tr("failed to parse transaction from daemon");
return false;
}
crypto::hash tx_hash, tx_prefix_hash;
cryptonote::transaction tx;
if (!cryptonote::parse_and_validate_tx_from_blob(tx_data, tx, tx_hash, tx_prefix_hash))
{
error = tr("failed to validate transaction from daemon");
return false;
}
if (tx_hash != txid)
{
error = tr("failed to get the right transaction from daemon");
return false;
}
crypto::key_derivation derivation;
if (!crypto::generate_key_derivation(address.m_view_public_key, tx_key, derivation))
{
error = tr("failed to generate key derivation from supplied parameters");
return false;
}
received = 0;
try {
for (size_t n = 0; n < tx.vout.size(); ++n)
{
if (typeid(cryptonote::txout_to_key) != tx.vout[n].target.type())
continue;
const cryptonote::txout_to_key tx_out_to_key = boost::get<cryptonote::txout_to_key>(tx.vout[n].target);
crypto::public_key pubkey;
derive_public_key(derivation, n, address.m_spend_public_key, pubkey);
if (pubkey == tx_out_to_key.key)
{
uint64_t amount;
if (tx.version == 1)
{
amount = tx.vout[n].amount;
}
else
{
try
{
rct::key Ctmp;
//rct::key amount_key = rct::hash_to_scalar(rct::scalarmultKey(rct::pk2rct(address.m_view_public_key), rct::sk2rct(tx_key)));
crypto::key_derivation derivation;
bool r = crypto::generate_key_derivation(address.m_view_public_key, tx_key, derivation);
if (!r)
{
LOG_ERROR("Failed to generate key derivation to decode rct output " << n);
amount = 0;
}
else
{
crypto::secret_key scalar1;
crypto::derivation_to_scalar(derivation, n, scalar1);
rct::ecdhTuple ecdh_info = tx.rct_signatures.ecdhInfo[n];
rct::ecdhDecode(ecdh_info, rct::sk2rct(scalar1));
rct::key C = tx.rct_signatures.outPk[n].mask;
rct::addKeys2(Ctmp, ecdh_info.mask, ecdh_info.amount, rct::H);
if (rct::equalKeys(C, Ctmp))
amount = rct::h2d(ecdh_info.amount);
else
amount = 0;
}
}
catch (...) { amount = 0; }
}
received += amount;
}
}
}
catch(const std::exception &e)
{
LOG_ERROR("error: " << e.what());
error = std::string(tr("error: ")) + e.what();
return false;
}
if (received > 0)
{
LOG_PRINT_L1(get_account_address_as_str(testnet, address) << " " << tr("received") << " " << cryptonote::print_money(received) << " " << tr("in txid") << " " << txid);
}
else
{
LOG_PRINT_L1(get_account_address_as_str(testnet, address) << " " << tr("received nothing in txid") << " " << txid);
}
if (res.txs.front().in_pool)
{
height = 0;
}
else
{
height = res.txs.front().block_height;
}
return true;
}
/**
* Get tx outputs associated with the given private view and public spend keys
*
*
*/
vector<xmreg::transfer_details>
get_belonging_outputs(const block& blk,
const transaction& tx,
const secret_key& private_view_key,
const public_key& public_spend_key,
uint64_t block_height)
{
// vector to be returned
vector<xmreg::transfer_details> our_outputs;
// get transaction's public key
public_key pub_tx_key = get_tx_pub_key_from_extra(tx);
// check if transaction has valid public key
// if no, then skip
if (pub_tx_key == null_pkey)
{
return our_outputs;
}
// get the total number of outputs in a transaction.
size_t output_no = tx.vout.size();
// check if the given transaction has any outputs
// if no, then finish
if (output_no == 0)
{
return our_outputs;
}
// public transaction key is combined with our viewkey
// to create, so called, derived key.
key_derivation derivation;
if (!generate_key_derivation(pub_tx_key, private_view_key, derivation))
{
cerr << "Cant get dervied key for: " << "\n"
<< "pub_tx_key: " << private_view_key << " and "
<< "prv_view_key" << private_view_key << endl;
return our_outputs;
}
// each tx that we (or the address we are checking) received
// contains a number of outputs.
// some of them are ours, some not. so we need to go through
// all of them in a given tx block, to check which outputs are ours.
// sum amount of xmr sent to us
// in the given transaction
uint64_t money_transfered {0};
// loop through outputs in the given tx
// to check which outputs our ours. we compare outputs'
// public keys with the public key that would had been
// generated for us if we had gotten the outputs.
// not sure this is the case though, but that's my understanding.
for (size_t i = 0; i < output_no; ++i)
{
// get the tx output public key
// that normally would be generated for us,
// if someone had sent us some xmr.
public_key pubkey;
derive_public_key(derivation,
i,
public_spend_key,
pubkey);
// get tx output public key
const txout_to_key tx_out_to_key
= boost::get<txout_to_key>(tx.vout[i].target);
//cout << "Output no: " << i << ", " << tx_out_to_key.key;
// check if the output's public key is ours
if (tx_out_to_key.key == pubkey)
{
// if so, then add this output to the
// returned vector
//our_outputs.push_back(tx.vout[i]);
our_outputs.push_back(
xmreg::transfer_details {block_height,
blk.timestamp,
tx, i, false}
);
}
}
return our_outputs;
}
bool is_out_to_acc(const account_keys& acc, const TransactionOutputToKey& out_key, const crypto::key_derivation& derivation, size_t keyIndex) {
crypto::public_key pk;
derive_public_key(derivation, keyIndex, acc.m_account_address.m_spendPublicKey, pk);
return pk == out_key.key;
}
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;
}
