/**
* 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;
}
/**
* 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 lookup_acc_outs(const account_keys& acc, const Transaction& tx, std::vector<size_t>& outs, uint64_t& money_transfered) {
crypto::public_key tx_pub_key = get_tx_pub_key_from_extra(tx);
if (null_pkey == tx_pub_key)
return false;
return lookup_acc_outs(acc, tx, tx_pub_key, outs, money_transfered);
}
crypto::public_key get_tx_pub_key_from_extra(const Transaction& tx) {
return get_tx_pub_key_from_extra(tx.extra);
}
