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authorLuke Dashjr <luke-jr+git@utopios.org>2016-04-23 23:30:20 +0000
committerLuke Dashjr <luke-jr+git@utopios.org>2016-06-06 17:10:22 +0000
commitd3df40e51a29bd98830043dd19829126390d1bc4 (patch)
treeedfd8caa0807b98e7ab56b91729018040f8fd8a6 /src/rpc
parent71527a0f31ae67edad0a7fcda59c75a6ce5666ca (diff)
Implement BIP 9 GBT changes
- BIP9DeploymentInfo struct for static deployment info - VersionBitsDeploymentInfo: Avoid C++11ism by commenting parameter names - getblocktemplate: Make sure to set deployments in the version if it is LOCKED_IN - In this commit, all rules are considered required for clients to support
Diffstat (limited to 'src/rpc')
-rw-r--r--src/rpc/mining.cpp50
1 files changed, 48 insertions, 2 deletions
diff --git a/src/rpc/mining.cpp b/src/rpc/mining.cpp
index c33082fca0..277696fe0b 100644
--- a/src/rpc/mining.cpp
+++ b/src/rpc/mining.cpp
@@ -7,6 +7,7 @@
#include "chain.h"
#include "chainparams.h"
#include "consensus/consensus.h"
+#include "consensus/params.h"
#include "consensus/validation.h"
#include "core_io.h"
#include "init.h"
@@ -260,6 +261,13 @@ static UniValue BIP22ValidationResult(const CValidationState& state)
return "valid?";
}
+std::string gbt_vb_name(const Consensus::DeploymentPos pos) {
+ const struct BIP9DeploymentInfo& vbinfo = VersionBitsDeploymentInfo[pos];
+ std::string s = vbinfo.name;
+ s.insert(s.begin(), '!');
+ return s;
+}
+
UniValue getblocktemplate(const UniValue& params, bool fHelp)
{
if (fHelp || params.size() > 1)
@@ -267,7 +275,9 @@ UniValue getblocktemplate(const UniValue& params, bool fHelp)
"getblocktemplate ( \"jsonrequestobject\" )\n"
"\nIf the request parameters include a 'mode' key, that is used to explicitly select between the default 'template' request or a 'proposal'.\n"
"It returns data needed to construct a block to work on.\n"
- "See https://en.bitcoin.it/wiki/BIP_0022 for full specification.\n"
+ "For full specification, see BIPs 22 and 9:\n"
+ " https://github.com/bitcoin/bips/blob/master/bip-0022.mediawiki\n"
+ " https://github.com/bitcoin/bips/blob/master/bip-0009.mediawiki#getblocktemplate_changes\n"
"\nArguments:\n"
"1. \"jsonrequestobject\" (string, optional) A json object in the following spec\n"
@@ -283,6 +293,12 @@ UniValue getblocktemplate(const UniValue& params, bool fHelp)
"\nResult:\n"
"{\n"
" \"version\" : n, (numeric) The block version\n"
+ " \"rules\" : [ \"rulename\", ... ], (array of strings) specific block rules that are to be enforced\n"
+ " \"vbavailable\" : { (json object) set of pending, supported versionbit (BIP 9) softfork deployments\n"
+ " \"rulename\" : bitnumber (numeric) identifies the bit number as indicating acceptance and readiness for the named softfork rule\n"
+ " ,...\n"
+ " },\n"
+ " \"vbrequired\" : n, (numeric) bit mask of versionbits the server requires set in submissions\n"
" \"previousblockhash\" : \"xxxx\", (string) The hash of current highest block\n"
" \"transactions\" : [ (array) contents of non-coinbase transactions that should be included in the next block\n"
" {\n"
@@ -458,9 +474,10 @@ UniValue getblocktemplate(const UniValue& params, bool fHelp)
pindexPrev = pindexPrevNew;
}
CBlock* pblock = &pblocktemplate->block; // pointer for convenience
+ const Consensus::Params& consensusParams = Params().GetConsensus();
// Update nTime
- UpdateTime(pblock, Params().GetConsensus(), pindexPrev);
+ UpdateTime(pblock, consensusParams, pindexPrev);
pblock->nNonce = 0;
UniValue aCaps(UniValue::VARR); aCaps.push_back("proposal");
@@ -511,7 +528,36 @@ UniValue getblocktemplate(const UniValue& params, bool fHelp)
UniValue result(UniValue::VOBJ);
result.push_back(Pair("capabilities", aCaps));
+
+ UniValue aRules(UniValue::VARR);
+ UniValue vbavailable(UniValue::VOBJ);
+ for (int i = 0; i < (int)Consensus::MAX_VERSION_BITS_DEPLOYMENTS; ++i) {
+ Consensus::DeploymentPos pos = Consensus::DeploymentPos(i);
+ ThresholdState state = VersionBitsState(pindexPrev, consensusParams, pos, versionbitscache);
+ switch (state) {
+ case THRESHOLD_DEFINED:
+ case THRESHOLD_FAILED:
+ // Not exposed to GBT at all
+ break;
+ case THRESHOLD_LOCKED_IN:
+ // Ensure bit is set in block version
+ pblock->nVersion |= VersionBitsMask(consensusParams, pos);
+ // FALL THROUGH to get vbavailable set...
+ case THRESHOLD_STARTED:
+ // Add to vbavailable (and it's presumably in version already)
+ vbavailable.push_back(Pair(gbt_vb_name(pos), consensusParams.vDeployments[pos].bit));
+ break;
+ case THRESHOLD_ACTIVE:
+ // Add to rules only
+ aRules.push_back(gbt_vb_name(pos));
+ break;
+ }
+ }
result.push_back(Pair("version", pblock->nVersion));
+ result.push_back(Pair("rules", aRules));
+ result.push_back(Pair("vbavailable", vbavailable));
+ result.push_back(Pair("vbrequired", int(0)));
+
result.push_back(Pair("previousblockhash", pblock->hashPrevBlock.GetHex()));
result.push_back(Pair("transactions", transactions));
result.push_back(Pair("coinbaseaux", aux));