[mining] Update difficulty - Add Bitcoin Private's adjustment schedule; display GetNetworkDifficulty in info rpcs
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@ -52,31 +52,48 @@ static CUpdatedBlock latestblock;
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/* Calculate the difficulty for a given block index,
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* or the block index of the given chain.
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*/
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double GetDifficulty(const CChain& chain, const CBlockIndex* blockindex)
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double GetDifficultyINTERNAL(const CBlockIndex* blockindex, bool networkDifficulty)
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{
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// Floating point number that is a multiple of the minimum difficulty,
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// minimum difficulty = 1.0.
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if (blockindex == nullptr)
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{
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if (chain.Tip() == nullptr)
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if (chainActive.Tip() == nullptr)
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return 1.0;
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else
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blockindex = chain.Tip();
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blockindex = chainActive.Tip();
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}
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int nShift = (blockindex->nBits >> 24) & 0xff;
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double dDiff =
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(double)0x0000ffff / (double)(blockindex->nBits & 0x00ffffff);
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uint32_t bits;
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if (networkDifficulty) {
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bits = GetNextWorkRequired(blockindex, nullptr, Params().GetConsensus());
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} else {
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bits = blockindex->nBits;
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}
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while (nShift < 29)
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// instead of using powLimit, network difficulty is calculated using a legacy powLimit value to maintain comparability with the network difficulty of other Equihash-based coins for mining profitability calculations.
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uint32_t powLimitLegacy = UintToArith256(Params().GetConsensus().prePowLimit).GetCompact();
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int nShift = (bits >> 24) & 0xff;
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int nShiftAmount = (powLimitLegacy >> 24) & 0xff;
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double dDiff =
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(double)(powLimitLegacy & 0x00ffffff) /
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(double)(bits & 0x00ffffff);
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while (nShift < nShiftAmount)
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{
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dDiff *= 256.0;
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nShift++;
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}
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while (nShift > 29)
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while (nShift > nShiftAmount)
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{
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dDiff /= 256.0;
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nShift--;
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}
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// for compatibility purposes, the floor of 1.0 is maintained.
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if (dDiff < 1) dDiff = 1.0;
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return dDiff;
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}
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@ -85,6 +102,11 @@ double GetDifficulty(const CBlockIndex* blockindex)
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return GetDifficulty(chainActive, blockindex);
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}
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double GetNetworkDifficulty(const CBlockIndex* blockindex)
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{
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return GetDifficultyINTERNAL(blockindex, true);
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}
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UniValue blockheaderToJSON(const CBlockIndex* blockindex)
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{
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AssertLockHeld(cs_main);
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@ -1240,7 +1262,7 @@ UniValue getblockchaininfo(const JSONRPCRequest& request)
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obj.pushKV("blocks", (int)chainActive.Height());
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obj.pushKV("headers", pindexBestHeader ? pindexBestHeader->nHeight : -1);
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obj.pushKV("bestblockhash", chainActive.Tip()->GetBlockHash().GetHex());
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obj.pushKV("difficulty", (double)GetDifficulty());
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obj.pushKV("difficulty", (double)GetNetworkDifficulty());
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obj.pushKV("mediantime", (int64_t)chainActive.Tip()->GetMedianTimePast());
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obj.pushKV("verificationprogress", GuessVerificationProgress(Params().TxData(), chainActive.Tip()));
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obj.pushKV("initialblockdownload", IsInitialBlockDownload());
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@ -18,6 +18,8 @@ class UniValue;
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*/
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double GetDifficulty(const CBlockIndex* blockindex = nullptr);
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double GetNetworkDifficulty(const CBlockIndex* blockindex = nullptr);
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/** Callback for when block tip changed. */
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void RPCNotifyBlockChange(bool ibd, const CBlockIndex *);
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@ -253,7 +253,7 @@ static UniValue getmininginfo(const JSONRPCRequest& request)
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obj.pushKV("blocks", (int)chainActive.Height());
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obj.pushKV("currentblockweight", (uint64_t)nLastBlockWeight);
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obj.pushKV("currentblocktx", (uint64_t)nLastBlockTx);
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obj.pushKV("difficulty", (double)GetDifficulty());
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obj.pushKV("difficulty", (double)GetNetworkDifficulty());
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obj.pushKV("networkhashps", getnetworkhashps(request));
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obj.pushKV("pooledtx", (uint64_t)mempool.size());
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obj.pushKV("chain", Params().NetworkIDString());
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