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58 lines
1.1 KiB
C++
58 lines
1.1 KiB
C++
#include <buffer.hpp>
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#include <pow.hpp>
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#include <cmath>
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namespace llarp
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{
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PoW::~PoW()
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{
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}
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bool
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PoW::DecodeKey(__attribute__((unused)) llarp_buffer_t k,
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__attribute__((unused)) 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(shorthash_func hashfunc, llarp_time_t now) const
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{
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if(now - timestamp > (uint64_t(extendedLifetime) * 1000))
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return false;
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byte_t digest[SHORTHASHSIZE];
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byte_t tmp[MaxSize];
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auto buf = llarp::StackBuffer< decltype(tmp) >(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(!hashfunc(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));
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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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} // namespace llarp
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