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67 lines
1.3 KiB
C++
67 lines
1.3 KiB
C++
#include "pow.hpp"
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#include "crypto/crypto.hpp"
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#include "util/buffer.hpp"
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#include <cmath>
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namespace llarp
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{
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PoW::~PoW() = default;
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bool
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PoW::DecodeKey(const llarp_buffer_t& /*k*/, llarp_buffer_t* /*val*/)
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{
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// TODO: implement me
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return false;
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}
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bool
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PoW::BEncode(llarp_buffer_t* buf) const
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{
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// TODO: implement me
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if (!bencode_start_dict(buf))
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return false;
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return bencode_end(buf);
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}
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bool
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PoW::IsValid(llarp_time_t now) const
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{
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if (now - timestamp > extendedLifetime)
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return false;
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ShortHash digest;
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std::array<byte_t, MaxSize> tmp;
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llarp_buffer_t buf(tmp);
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// encode
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if (!BEncode(&buf))
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return false;
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// rewind
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buf.sz = buf.cur - buf.base;
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buf.cur = buf.base;
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// hash
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if (!CryptoManager::instance()->shorthash(digest, buf))
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return false;
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// check bytes required
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uint32_t required = std::floor(std::log(extendedLifetime.count()));
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for (uint32_t idx = 0; idx < required; ++idx)
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{
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if (digest[idx])
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return false;
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}
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return true;
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}
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std::string
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PoW::ToString() const
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{
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return fmt::format(
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"[PoW timestamp={} lifetime={} nonce={}]",
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timestamp.count(),
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extendedLifetime.count(),
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nonce);
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}
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} // namespace llarp
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