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lokinet/llarp/pow.cpp
michael-loki 0195152e05 Allow builds on MSVC (#518)
* Import cxxopts to replace getopts usage

* Add visual studio build things

* Fixup abseil build parts

* Replace __attribute__((unused)) with ABSL_ATTRIBUTE_UNUSED

* Fixup minor windows build issues

* Replace getopts usage

* Temporarily fixup .rc files

* More minor windows fixes

* Get a working build

* Revert .rc files

* Revert changes to nodedb
2019-04-19 13:24:33 -05:00

70 lines
1.4 KiB
C++

#include <pow.hpp>
#include <util/buffer.hpp>
#include <cmath>
namespace llarp
{
PoW::~PoW()
{
}
bool
PoW::DecodeKey(ABSL_ATTRIBUTE_UNUSED const llarp_buffer_t& k,
ABSL_ATTRIBUTE_UNUSED llarp_buffer_t* val)
{
// TODO: implement me
return false;
}
bool
PoW::BEncode(llarp_buffer_t* buf) const
{
// TODO: implement me
if(!bencode_start_dict(buf))
return false;
return bencode_end(buf);
}
bool
PoW::IsValid(shorthash_func hashfunc, llarp_time_t now) const
{
if(now - timestamp > (uint64_t(extendedLifetime) * 1000))
return false;
ShortHash digest;
std::array< byte_t, MaxSize > tmp;
llarp_buffer_t buf(tmp);
// encode
if(!BEncode(&buf))
return false;
// rewind
buf.sz = buf.cur - buf.base;
buf.cur = buf.base;
// hash
if(!hashfunc(digest, buf))
return false;
// check bytes required
uint32_t required = std::floor(std::log(extendedLifetime));
for(uint32_t idx = 0; idx < required; ++idx)
{
if(digest[idx])
return false;
}
return true;
}
std::ostream&
PoW::print(std::ostream& stream, int level, int spaces) const
{
Printer printer(stream, level, spaces);
printer.printAttribute("pow timestamp", timestamp);
printer.printAttribute("lifetime", extendedLifetime);
printer.printAttribute("nonce", nonce);
return stream;
}
} // namespace llarp