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authorJeff Garzik <jgarzik@bitpay.com>2013-10-01 07:09:04 -0700
committerJeff Garzik <jgarzik@bitpay.com>2013-10-01 07:09:04 -0700
commit19c415b1cf0dc4fd5fe08e8e7e146c7996261170 (patch)
tree13a6ee3c9b96736b3c767985714780d92df694d5 /src/rpcmining.cpp
parent95a766abc5ae210cb6f35387dedaeab7475e4a92 (diff)
parentd64eef48a45d1bbbbab5adf39d6ba1fe4537cea1 (diff)
Merge pull request #2888 from litecoin-project/getnetworkhashps
Add getnetworkhashps to get the estimated network hashrate
Diffstat (limited to 'src/rpcmining.cpp')
-rw-r--r--src/rpcmining.cpp54
1 files changed, 54 insertions, 0 deletions
diff --git a/src/rpcmining.cpp b/src/rpcmining.cpp
index c7f516caa7..2b7a5e38c3 100644
--- a/src/rpcmining.cpp
+++ b/src/rpcmining.cpp
@@ -27,6 +27,59 @@ void ShutdownRPCMining()
delete pMiningKey; pMiningKey = NULL;
}
+// Return average network hashes per second based on the last 'lookup' blocks,
+// or from the last difficulty change if 'lookup' is nonpositive.
+// If 'height' is nonnegative, compute the estimate at the time when a given block was found.
+Value GetNetworkHashPS(int lookup, int height) {
+ CBlockIndex *pb = pindexBest;
+
+ if (height >= 0 && height < nBestHeight)
+ pb = FindBlockByHeight(height);
+
+ if (pb == NULL || !pb->nHeight)
+ return 0;
+
+ // If lookup is -1, then use blocks since last difficulty change.
+ if (lookup <= 0)
+ lookup = pb->nHeight % 2016 + 1;
+
+ // If lookup is larger than chain, then set it to chain length.
+ if (lookup > pb->nHeight)
+ lookup = pb->nHeight;
+
+ CBlockIndex *pb0 = pb;
+ int64 minTime = pb0->GetBlockTime();
+ int64 maxTime = minTime;
+ for (int i = 0; i < lookup; i++) {
+ pb0 = pb0->pprev;
+ int64 time = pb0->GetBlockTime();
+ minTime = std::min(time, minTime);
+ maxTime = std::max(time, maxTime);
+ }
+
+ // In case there's a situation where minTime == maxTime, we don't want a divide by zero exception.
+ if (minTime == maxTime)
+ return 0;
+
+ uint256 workDiff = pb->nChainWork - pb0->nChainWork;
+ int64 timeDiff = maxTime - minTime;
+
+ return (boost::int64_t)(workDiff.getdouble() / timeDiff);
+}
+
+Value getnetworkhashps(const Array& params, bool fHelp)
+{
+ if (fHelp || params.size() > 2)
+ throw runtime_error(
+ "getnetworkhashps [blocks] [height]\n"
+ "Returns the estimated network hashes per second based on the last 120 blocks.\n"
+ "Pass in [blocks] to override # of blocks, -1 specifies since last difficulty change.\n"
+ "Pass in [height] to estimate the network speed at the time when a certain block was found.");
+
+ return GetNetworkHashPS(params.size() > 0 ? params[0].get_int() : 120, params.size() > 1 ? params[1].get_int() : -1);
+}
+
+
Value getgenerate(const Array& params, bool fHelp)
{
if (fHelp || params.size() != 0)
@@ -93,6 +146,7 @@ Value getmininginfo(const Array& params, bool fHelp)
obj.push_back(Pair("generate", GetBoolArg("-gen", false)));
obj.push_back(Pair("genproclimit", (int)GetArg("-genproclimit", -1)));
obj.push_back(Pair("hashespersec", gethashespersec(params, false)));
+ obj.push_back(Pair("networkhashps", getnetworkhashps(params, false)));
obj.push_back(Pair("pooledtx", (uint64_t)mempool.size()));
obj.push_back(Pair("testnet", TestNet()));
return obj;