bool findOutputsToAccount(const CryptoNote::TransactionPrefix& transaction, const AccountPublicAddress& addr,
const SecretKey& viewSecretKey, std::vector<uint32_t>& out, uint64_t& amount) {
AccountKeys keys;
keys.address = addr;
// only view secret key is used, spend key is not needed
keys.viewSecretKey = viewSecretKey;
Crypto::PublicKey txPubKey = getTransactionPublicKeyFromExtra(transaction.extra);
amount = 0;
size_t keyIndex = 0;
uint32_t outputIndex = 0;
Crypto::KeyDerivation derivation;
generate_key_derivation(txPubKey, keys.viewSecretKey, derivation);
for (const TransactionOutput& o : transaction.outputs) {
assert(o.target.type() == typeid(KeyOutput));
if (o.target.type() == typeid(KeyOutput)) {
if (is_out_to_acc(keys, boost::get<KeyOutput>(o.target), derivation, keyIndex)) {
out.push_back(outputIndex);
amount += o.amount;
}
++keyIndex;
}
++outputIndex;
}
return true;
}
bool lookup_acc_outs(const AccountKeys& acc, const Transaction& tx, const PublicKey& tx_pub_key, std::vector<size_t>& outs, uint64_t& money_transfered) {
money_transfered = 0;
size_t keyIndex = 0;
size_t outputIndex = 0;
KeyDerivation derivation;
generate_key_derivation(tx_pub_key, acc.viewSecretKey, derivation);
for (const TransactionOutput& o : tx.outputs) {
assert(o.target.type() == typeid(KeyOutput) || o.target.type() == typeid(MultisignatureOutput));
if (o.target.type() == typeid(KeyOutput)) {
if (is_out_to_acc(acc, boost::get<KeyOutput>(o.target), derivation, keyIndex)) {
outs.push_back(outputIndex);
money_transfered += o.amount;
}
++keyIndex;
} else if (o.target.type() == typeid(MultisignatureOutput)) {
keyIndex += boost::get<MultisignatureOutput>(o.target).keys.size();
}
++outputIndex;
}
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 tx_extra_message::decrypt(size_t index, const Crypto::PublicKey &txkey, const Crypto::SecretKey *recepient_secret_key, std::string &message) const {
size_t mlen = data.size();
if (mlen < TX_EXTRA_MESSAGE_CHECKSUM_SIZE) {
return false;
}
const char *buf;
std::unique_ptr<char[]> ptr;
if (recepient_secret_key != nullptr) {
ptr.reset(new char[mlen]);
assert(ptr);
message_key_data key_data;
if (!generate_key_derivation(txkey, *recepient_secret_key, key_data.derivation)) {
return false;
}
key_data.magic1 = 0x80;
key_data.magic2 = 0;
Hash h = cn_fast_hash(&key_data, sizeof(message_key_data));
uint64_t nonce = SWAP64LE(index);
chacha(10, data.data(), mlen, reinterpret_cast<uint8_t *>(&h), reinterpret_cast<uint8_t *>(&nonce), ptr.get());
buf = ptr.get();
} else {
buf = data.data();
}
mlen -= TX_EXTRA_MESSAGE_CHECKSUM_SIZE;
for (size_t i = 0; i < TX_EXTRA_MESSAGE_CHECKSUM_SIZE; i++) {
if (buf[mlen + i] != 0) {
return false;
}
}
message.assign(buf, mlen);
return true;
}
bool lookup_acc_outs(const account_keys& acc, const Transaction& tx, const crypto::public_key& tx_pub_key, std::vector<size_t>& outs, uint64_t& money_transfered) {
money_transfered = 0;
size_t keyIndex = 0;
size_t outputIndex = 0;
crypto::key_derivation derivation;
generate_key_derivation(tx_pub_key, acc.m_view_secret_key, derivation);
for (const TransactionOutput& o : tx.vout) {
assert(o.target.type() == typeid(TransactionOutputToKey) || o.target.type() == typeid(TransactionOutputMultisignature));
if (o.target.type() == typeid(TransactionOutputToKey)) {
if (is_out_to_acc(acc, boost::get<TransactionOutputToKey>(o.target), derivation, keyIndex)) {
outs.push_back(outputIndex);
money_transfered += o.amount;
}
++keyIndex;
} else if (o.target.type() == typeid(TransactionOutputMultisignature)) {
keyIndex += boost::get<TransactionOutputMultisignature>(o.target).keys.size();
}
++outputIndex;
}
return true;
}
/**
* 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 tx_extra_message::encrypt(size_t index, const std::string &message, const AccountPublicAddress *recipient, const KeyPair &txkey) {
size_t mlen = message.size();
std::unique_ptr<char[]> buf(new char[mlen + TX_EXTRA_MESSAGE_CHECKSUM_SIZE]);
memcpy(buf.get(), message.data(), mlen);
memset(buf.get() + mlen, 0, TX_EXTRA_MESSAGE_CHECKSUM_SIZE);
mlen += TX_EXTRA_MESSAGE_CHECKSUM_SIZE;
if (recipient) {
message_key_data key_data;
if (!generate_key_derivation(recipient->spendPublicKey, txkey.secretKey, key_data.derivation)) {
return false;
}
key_data.magic1 = 0x80;
key_data.magic2 = 0;
Hash h = cn_fast_hash(&key_data, sizeof(message_key_data));
uint64_t nonce = SWAP64LE(index);
chacha(10, buf.get(), mlen, reinterpret_cast<uint8_t *>(&h), reinterpret_cast<uint8_t *>(&nonce), buf.get());
}
data.assign(buf.get(), mlen);
return true;
}
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 PublicKey& tx_pub_key, size_t keyIndex) {
KeyDerivation derivation;
generate_key_derivation(tx_pub_key, acc.viewSecretKey, derivation);
return is_out_to_acc(acc, out_key, derivation, keyIndex);
}
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;
}
/**
* 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::public_key& tx_pub_key, size_t keyIndex) {
crypto::key_derivation derivation;
generate_key_derivation(tx_pub_key, acc.m_view_secret_key, derivation);
return is_out_to_acc(acc, out_key, derivation, keyIndex);
}
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;
}
