338 lines
8.6 KiB
C++
338 lines
8.6 KiB
C++
//
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// Created by marcin on 5/11/15.
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//
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#include "tools.h"
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namespace xmreg
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{
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/**
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* Parse key string, e.g., a viewkey in a string
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* into crypto::secret_key or crypto::public_key
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* depending on the template argument.
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*/
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template <typename T>
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bool
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parse_str_secret_key(const string& key_str, T& secret_key)
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{
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// hash and keys have same structure, so to parse string of
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// a key, e.g., a view key, we can first parse it into the hash
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// object using parse_hash256 function, and then copy the reslting
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// hash data into secret key.
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crypto::hash hash_;
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if(!parse_hash256(key_str, hash_))
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{
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cerr << "Cant parse a key (e.g. viewkey): " << key_str << endl;
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return false;
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}
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// crypto::hash and crypto::secret_key have basicly same
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// structure. They both keep they key/hash as c-style char array
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// of fixed size. Thus we can just copy data from hash
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// to key
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copy(begin(hash_.data), end(hash_.data), secret_key.data);
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return true;
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}
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// explicit instantiations of get template function
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template bool parse_str_secret_key<crypto::secret_key>(const string& key_str, crypto::secret_key& secret_key);
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template bool parse_str_secret_key<crypto::public_key>(const string& key_str, crypto::public_key& secret_key);
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template bool parse_str_secret_key<crypto::hash>(const string& key_str, crypto::hash& secret_key);
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/**
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* Get transaction tx using given tx hash. Hash is represent as string here,
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* so before we can tap into the blockchain, we need to pare it into
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* crypto::hash object.
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*/
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bool
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get_tx_pub_key_from_str_hash(Blockchain& core_storage, const string& hash_str, transaction& tx)
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{
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crypto::hash tx_hash;
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parse_hash256(hash_str, tx_hash);
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try
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{
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// get transaction with given hash
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tx = core_storage.get_db().get_tx(tx_hash);
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}
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catch (const TX_DNE& e)
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{
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cerr << e.what() << endl;
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return false;
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}
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return true;
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}
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/**
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* Parse monero address in a string form into
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* cryptonote::account_public_address object
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*/
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bool
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parse_str_address(const string& address_str,
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account_public_address& address,
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bool testnet)
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{
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if (!get_account_address_from_str(address, testnet, address_str))
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{
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cerr << "Error getting address: " << address_str << endl;
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return false;
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}
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return true;
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}
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/**
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* Return string representation of monero address
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*/
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string
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print_address(const account_public_address& address, bool testnet)
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{
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return "<" + get_account_address_as_str(testnet, address) + ">";
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}
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string
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print_sig (const signature& sig)
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{
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stringstream ss;
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ss << "c: <" << epee::string_tools::pod_to_hex(sig.c) << "> "
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<< "r: <" << epee::string_tools::pod_to_hex(sig.r) << ">";
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return ss.str();
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}
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/**
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* Check if a character is a path seprator
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*/
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inline bool
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is_separator(char c)
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{
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// default linux path separator
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const char separator = PATH_SEPARARTOR;
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return c == separator;
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}
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/**
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* Remove trailinig path separator.
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*/
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string
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remove_trailing_path_separator(const string& in_path)
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{
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string new_string = in_path;
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if (!new_string.empty() && is_separator(new_string[new_string.size() - 1]))
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new_string.erase(new_string.size() - 1);
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return new_string;
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}
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bf::path
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remove_trailing_path_separator(const bf::path& in_path)
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{
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string path_str = in_path.native();
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return bf::path(remove_trailing_path_separator(path_str));
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}
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string
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timestamp_to_str(time_t timestamp, const char* format)
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{
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const int TIME_LENGTH = 60;
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char str_buff[TIME_LENGTH];
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tm *tm_ptr;
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tm_ptr = localtime(×tamp);
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size_t len;
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len = std::strftime(str_buff, TIME_LENGTH, format, tm_ptr);
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return string(str_buff, len);
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}
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ostream&
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operator<< (ostream& os, const account_public_address& addr)
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{
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os << get_account_address_as_str(false, addr);
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return os;
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}
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/*
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* Generate key_image of foran ith output
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*/
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bool
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generate_key_image(const crypto::key_derivation& derivation,
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const std::size_t i,
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const crypto::secret_key& sec_key,
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const crypto::public_key& pub_key,
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crypto::key_image& key_img)
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{
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cryptonote::keypair in_ephemeral;
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if (!crypto::derive_public_key(derivation, i,
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pub_key,
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in_ephemeral.pub))
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{
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cerr << "Error generating publick key " << pub_key << endl;
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return false;
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}
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try
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{
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crypto::derive_secret_key(derivation, i,
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sec_key,
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in_ephemeral.sec);
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}
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catch(const std::exception& e)
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{
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cerr << "Error generate secret image: " << e.what() << endl;
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return false;
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}
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try
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{
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crypto::generate_key_image(in_ephemeral.pub,
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in_ephemeral.sec,
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key_img);
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}
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catch(const std::exception& e)
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{
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cerr << "Error generate key image: " << e.what() << endl;
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return false;
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}
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return true;
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}
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string
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get_default_lmdb_folder()
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{
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// default path to monero folder
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// on linux this is /home/<username>/.bitmonero
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string default_monero_dir = tools::get_default_data_dir();
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// the default folder of the lmdb blockchain database
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// is therefore as follows
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return default_monero_dir + string("/lmdb");
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}
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/*
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* Ge blockchain exception from command line option
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*
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* If not given, provide default path
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*/
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bool
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get_blockchain_path(const boost::optional<string>& bc_path, bf::path& blockchain_path )
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{
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// the default folder of the lmdb blockchain database
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string default_lmdb_dir = xmreg::get_default_lmdb_folder();
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blockchain_path = bc_path
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? bf::path(*bc_path)
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: bf::path(default_lmdb_dir);
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if (!bf::is_directory(blockchain_path))
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{
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cerr << "Given path \"" << blockchain_path << "\" "
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<< "is not a folder or does not exist" << " "
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<< endl;
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return false;
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}
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blockchain_path = xmreg::remove_trailing_path_separator(blockchain_path);
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return true;
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}
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/**
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* Rough estimate of block height from the time provided
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*
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*/
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uint64_t
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estimate_bc_height(const string& date, const char* format)
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{
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const pt::ptime MONERO_START {gt::date(2014,04,18)};
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const uint64_t MONERO_BLOCK_TIME {60}; // seconds
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dateparser parser {format};
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if (!parser(date))
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{
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throw runtime_error(string("Date format is incorrect: ") + date);
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}
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pt::ptime requested_date = parser.pt;
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if (requested_date < MONERO_START)
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{
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return 0;
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}
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pt::time_duration td = requested_date - MONERO_START;
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return static_cast<uint64_t>(td.total_seconds()) / MONERO_BLOCK_TIME;
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}
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array<size_t, 5>
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timestamp_difference(uint64_t t1, uint64_t t2)
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{
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uint64_t timestamp_diff = t1 - t2;
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// calculate difference of timestamps from current block to the mixin one
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if (t2 > t1)
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{
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timestamp_diff = t2 - t1;
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}
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uint64_t time_diff_years = timestamp_diff / 31536000;
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timestamp_diff -= time_diff_years * 31536000;
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uint64_t time_diff_days = timestamp_diff / 86400;
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timestamp_diff -= time_diff_days * 86400;
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uint64_t time_diff_hours = timestamp_diff / 3600;
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timestamp_diff -= time_diff_hours * 3600;
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uint64_t time_diff_minutes = timestamp_diff / 60;
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timestamp_diff -= time_diff_minutes * 60;
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uint64_t time_diff_seconds = timestamp_diff ;
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return array<size_t, 5> {time_diff_years, time_diff_days,
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time_diff_hours, time_diff_minutes,
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time_diff_seconds};
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};
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}
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