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Monero addres from DNS TXT record implemented, tests pass

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Still need to deal with DNSSEC and optional fields in the TXT record.
This commit is contained in:
Thomas Winget 2014-09-17 17:26:51 -04:00 • committed by Riccardo Spagni
parent 3fb0fc020f
commit a5757a628f
6 changed files with 243 additions and 24 deletions
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54
src/wallet/wallet2.cpp
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@ -47,6 +47,7 @@ using namespace epee;
#include "serialization/binary_utils.h"
#include "cryptonote_protocol/blobdatatype.h"
#include "crypto/electrum-words.h"
#include "common/dns_utils.h"
extern "C"
{
@ -751,6 +752,7 @@ void wallet2::add_unconfirmed_tx(const cryptonote::transaction& tx, uint64_t cha
utd.m_sent_time = time(NULL);
utd.m_tx = tx;
}
//----------------------------------------------------------------------------------------------------
void wallet2::transfer(const std::vector<cryptonote::tx_destination_entry>& dsts, size_t fake_outputs_count,
uint64_t unlock_time, uint64_t fee, const std::vector<uint8_t>& extra, cryptonote::transaction& tx, pending_tx& ptx)
@ -815,6 +817,58 @@ std::vector<std::vector<cryptonote::tx_destination_entry>> split_amounts(
}
} // anonymous namespace
/**
* @brief gets a monero address from the TXT record of a DNS entry
*
* gets the monero address from the TXT record of the DNS entry associated
* with <url>. If this lookup fails, or the TXT record does not contain an
* XMR address in the correct format, returns an empty string. <dnssec_valid>
* will be set true or false according to whether or not the DNS query passes
* DNSSEC validation.
*
* @param url the url to look up
* @param dnssec_valid return-by-reference for DNSSEC status of query
*
* @return a monero address (as a string) or an empty string
*/
std::string wallet2::address_from_url(const std::string& url, bool& dnssec_valid)
{
// TODO: update this correctly once DNSResolver::get_txt_record() supports it.
dnssec_valid = false;
// get txt record
std::string txt = tools::DNSResolver::instance().get_txt_record(url);
if (txt.size())
{
return address_from_txt_record(txt);
}
return std::string();
}
//----------------------------------------------------------------------------------------------------
std::string wallet2::address_from_txt_record(const std::string& s)
{
// make sure the txt record has "oa1:xmr" and find it
auto pos = s.find("oa1:xmr");
// search from there to find "recipient_address="
pos = s.find("recipient_address=", pos);
pos += 18; // move past "recipient_address="
// find the next semicolon
auto pos2 = s.find(";", pos);
if (pos2 != std::string::npos)
{
// length of address == 95, we can at least validate that much here
if (pos2 - pos == 95)
{
return s.substr(pos, 95);
}
}
return std::string();
}
//----------------------------------------------------------------------------------------------------
// take a pending tx and actually send it to the daemon
void wallet2::commit_tx(pending_tx& ptx)