Fix Equihash state initialisation in miner
After a new block is found or after a few nonces have been tried (currently after every nonce), the miner checks for global changes. If any of these are triggered, a new block is built from scratch, which re-initialises the Equihash input. But if none of the checks are triggered, the miner just updates nTime and continues mining - without updating the Equihash input to account for the new block header. This bugfix corrects the behaviour by regenerating the Equihash input in both situations.
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@ -486,6 +486,7 @@ void static BitcoinMiner(CWallet *pwallet)
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int64_t nStart = GetTime();
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arith_uint256 hashTarget = arith_uint256().SetCompact(pblock->nBits);
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while (true) {
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// Hash state
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crypto_generichash_blake2b_state state;
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eh.InitialiseState(state);
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@ -498,7 +499,6 @@ void static BitcoinMiner(CWallet *pwallet)
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// H(I||...
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crypto_generichash_blake2b_update(&state, (unsigned char*)&ss[0], ss.size());
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while (true) {
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// Find valid nonce
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while (true)
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{
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