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93 lines
2.1 KiB
93 lines
2.1 KiB
/** |
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* Wrapper to OpenSSL BIGNUM used by net diff (nBits) |
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*/ |
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#include <stdio.h> |
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#include "uint256.h" |
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#include "bignum.hpp" |
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#include "miner.h" // hex2bin |
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extern "C" double bn_convert_nbits(const uint32_t nBits) |
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{ |
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uint256 bn = CBigNum().SetCompact(nBits).getuint256(); |
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return bn.getdouble(); |
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} |
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// copy the big number to 32-bytes uchar |
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extern "C" void bn_nbits_to_uchar(const uint32_t nBits, unsigned char *target) |
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{ |
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char buff[65]; |
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uint256 bn = CBigNum().SetCompact(nBits).getuint256(); |
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snprintf(buff, 65, "%s\n", bn.ToString().c_str()); buff[64] = '\0'; |
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hex2bin(target, buff, 32); |
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} |
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// unused, but should allow more than 256bits targets |
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#if 0 |
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extern "C" double bn_hash_target_ratio(uint32_t* hash, uint32_t* target) |
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{ |
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double dhash; |
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if (!opt_showdiff) |
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return 0.0; |
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CBigNum h(0), t(0); |
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std::vector<unsigned char> vch(32); |
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memcpy(&vch[0], (void*) target, 32); |
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t.setvch(vch); |
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memcpy(&vch[0], (void*) hash, 32); |
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h.setvch(vch); |
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dhash = h.getuint256().getdouble(); |
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if (dhash > 0.) |
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return t.getuint256().getdouble() / dhash; |
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else |
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return dhash; |
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} |
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#endif |
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// compute the diff ratio between a found hash and the target |
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extern "C" double bn_hash_target_ratio(uint32_t* hash, uint32_t* target) |
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{ |
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uint256 h, t; |
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double dhash; |
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if (!opt_showdiff) |
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return 0.0; |
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memcpy(&t, (void*) target, 32); |
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memcpy(&h, (void*) hash, 32); |
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dhash = h.getdouble(); |
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if (dhash > 0.) |
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return t.getdouble() / dhash; |
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else |
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return dhash; |
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} |
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// store ratio in work struct |
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extern "C" void bn_store_hash_target_ratio(uint32_t* hash, uint32_t* target, struct work* work, int nonce) |
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{ |
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// only if the option is enabled (to reduce cpu usage) |
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if (!opt_showdiff) return; |
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work->shareratio[nonce] = bn_hash_target_ratio(hash, target); |
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work->sharediff[nonce] = work->targetdiff * work->shareratio[nonce]; |
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} |
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// new method to save all nonce(s) share diff/ration |
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extern "C" void bn_set_target_ratio(struct work* work, uint32_t* hash, int nonce) |
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{ |
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bn_store_hash_target_ratio(hash, work->target, work, nonce); |
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} |
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// compat (only store single nonce share diff per work) |
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extern "C" void work_set_target_ratio(struct work* work, uint32_t* hash) |
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{ |
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bn_store_hash_target_ratio(hash, work->target, work, 0); |
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} |
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