76 lines
2.7 KiB
C++
76 lines
2.7 KiB
C++
// Copyright (c) 2018 Michael Toutonghi
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include "hash.h"
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#include "nonce.h"
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#include <cstring>
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extern char ASSETCHAINS_SYMBOL[65];
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arith_uint256 CPOSNonce::entropyMask = UintToArith256(uint256S("00000000000000000000000000000000ffffffffffffffffffffffff00000000"));
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arith_uint256 CPOSNonce::posDiffMask = UintToArith256(uint256S("00000000000000000000000000000000000000000000000000000000ffffffff"));
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bool CPOSNonce::NewPOSActive(int32_t height)
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{
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if ((strcmp(ASSETCHAINS_SYMBOL, "VRSC") == 0) && (height < (96480 + 100)))
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return false;
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else if ((strcmp(ASSETCHAINS_SYMBOL, "VRSCTEST") == 0) && (height < (1000 + 100)))
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return false;
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else
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return true;
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}
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bool CPOSNonce::NewNonceActive(int32_t height)
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{
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if ((strcmp(ASSETCHAINS_SYMBOL, "VRSC") == 0) && (height < 96480))
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return false;
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else if ((strcmp(ASSETCHAINS_SYMBOL, "VRSCTEST") == 0) && (height < 1000))
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return false;
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else
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return true;
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}
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void CPOSNonce::SetPOSEntropy(const uint256 &pastHash, uint256 txid, int32_t voutNum)
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{
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// get low 96 bits of past hash and put it in top 96 bits of low 128 bits of nonce
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CVerusHashWriter hashWriter = CVerusHashWriter(SER_GETHASH, PROTOCOL_VERSION);
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// first hash the pastHash, txid, and voutNum, to create a combined 96 bits, which will be used in the nonce
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hashWriter << pastHash;
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hashWriter << txid;
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hashWriter << voutNum;
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arith_uint256 arNonce = (UintToArith256(*this) & posDiffMask) |
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(UintToArith256(hashWriter.GetHash()) & entropyMask);
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// printf("before %s\n", ArithToUint256(arNonce).GetHex().c_str());
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hashWriter.Reset();
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hashWriter << ArithToUint256(arNonce);
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*this = CPOSNonce(ArithToUint256((UintToArith256(hashWriter.GetHash()) << 128) | arNonce));
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// printf("after %s\n", this->GetHex().c_str());
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}
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bool CPOSNonce::CheckPOSEntropy(const uint256 &pastHash, uint256 txid, int32_t voutNum)
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{
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// get low 96 bits of past hash and put it in top 96 bits of low 128 bits of nonce
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CVerusHashWriter hashWriter = CVerusHashWriter(SER_GETHASH, PROTOCOL_VERSION);
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// first hash the pastHash, txid, and voutNum, to create a combined 96 bits, which will be used in the nonce
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hashWriter << pastHash;
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hashWriter << txid;
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hashWriter << voutNum;
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arith_uint256 arNonce = (UintToArith256(*this) & posDiffMask) |
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(UintToArith256(hashWriter.GetHash()) & entropyMask);
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hashWriter.Reset();
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hashWriter << ArithToUint256(arNonce);
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return UintToArith256(*this) == (UintToArith256(hashWriter.GetHash()) << 128 | arNonce);
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}
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