/** * 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); }