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-rw-r--r--src/consensus/params.h1
-rw-r--r--src/main.cpp2
-rw-r--r--src/main.h2
-rw-r--r--src/rpcmining.cpp105
-rw-r--r--src/versionbits.cpp13
-rw-r--r--src/versionbits.h9
6 files changed, 122 insertions, 10 deletions
diff --git a/src/consensus/params.h b/src/consensus/params.h
index 4f3480b89b..6c4cc49479 100644
--- a/src/consensus/params.h
+++ b/src/consensus/params.h
@@ -16,6 +16,7 @@ enum DeploymentPos
{
DEPLOYMENT_TESTDUMMY,
DEPLOYMENT_CSV, // Deployment of BIP68, BIP112, and BIP113.
+ // NOTE: Also add new deployments to VersionBitsDeploymentInfo in versionbits.cpp
MAX_VERSION_BITS_DEPLOYMENTS
};
diff --git a/src/main.cpp b/src/main.cpp
index 5187d543a1..6dc2b3ba0c 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -2160,7 +2160,7 @@ void PartitionCheck(bool (*initialDownloadCheck)(), CCriticalSection& cs, const
}
// Protected by cs_main
-static VersionBitsCache versionbitscache;
+VersionBitsCache versionbitscache;
int32_t ComputeBlockVersion(const CBlockIndex* pindexPrev, const Consensus::Params& params)
{
diff --git a/src/main.h b/src/main.h
index 1a696dcd91..838d766809 100644
--- a/src/main.h
+++ b/src/main.h
@@ -536,6 +536,8 @@ extern CBlockTreeDB *pblocktree;
*/
int GetSpendHeight(const CCoinsViewCache& inputs);
+extern VersionBitsCache versionbitscache;
+
/**
* Determine what nVersion a new block should use.
*/
diff --git a/src/rpcmining.cpp b/src/rpcmining.cpp
index 1048344e00..18c3b3a511 100644
--- a/src/rpcmining.cpp
+++ b/src/rpcmining.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"
@@ -320,6 +321,15 @@ 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;
+ if (!vbinfo.gbt_force) {
+ s.insert(s.begin(), '!');
+ }
+ return s;
+}
+
UniValue getblocktemplate(const UniValue& params, bool fHelp)
{
if (fHelp || params.size() > 1)
@@ -327,7 +337,9 @@ 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"
@@ -343,6 +355,12 @@ 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"
@@ -386,6 +404,8 @@ UniValue getblocktemplate(const UniValue& params, bool fHelp)
std::string strMode = "template";
UniValue lpval = NullUniValue;
+ std::set<std::string> setClientRules;
+ int64_t nMaxVersionPreVB = -1;
if (params.size() > 0)
{
const UniValue& oparam = params[0].get_obj();
@@ -429,6 +449,20 @@ UniValue getblocktemplate(const UniValue& params, bool fHelp)
TestBlockValidity(state, Params(), block, pindexPrev, false, true);
return BIP22ValidationResult(state);
}
+
+ const UniValue& aClientRules = find_value(oparam, "rules");
+ if (aClientRules.isArray()) {
+ for (unsigned int i = 0; i < aClientRules.size(); ++i) {
+ const UniValue& v = aClientRules[i];
+ setClientRules.insert(v.get_str());
+ }
+ } else {
+ // NOTE: It is important that this NOT be read if versionbits is supported
+ const UniValue& uvMaxVersion = find_value(oparam, "maxversion");
+ if (uvMaxVersion.isNum()) {
+ nMaxVersionPreVB = uvMaxVersion.get_int64();
+ }
+ }
}
if (strMode != "template")
@@ -518,9 +552,10 @@ 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");
@@ -561,17 +596,69 @@ UniValue getblocktemplate(const UniValue& params, bool fHelp)
arith_uint256 hashTarget = arith_uint256().SetCompact(pblock->nBits);
- static UniValue aMutable(UniValue::VARR);
- if (aMutable.empty())
- {
- aMutable.push_back("time");
- aMutable.push_back("transactions");
- aMutable.push_back("prevblock");
- }
+ UniValue aMutable(UniValue::VARR);
+ aMutable.push_back("time");
+ aMutable.push_back("transactions");
+ aMutable.push_back("prevblock");
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:
+ {
+ const struct BIP9DeploymentInfo& vbinfo = VersionBitsDeploymentInfo[pos];
+ vbavailable.push_back(Pair(gbt_vb_name(pos), consensusParams.vDeployments[pos].bit));
+ if (setClientRules.find(vbinfo.name) == setClientRules.end()) {
+ if (!vbinfo.gbt_force) {
+ // If the client doesn't support this, don't indicate it in the [default] version
+ pblock->nVersion &= ~VersionBitsMask(consensusParams, pos);
+ }
+ }
+ break;
+ }
+ case THRESHOLD_ACTIVE:
+ {
+ // Add to rules only
+ const struct BIP9DeploymentInfo& vbinfo = VersionBitsDeploymentInfo[pos];
+ aRules.push_back(gbt_vb_name(pos));
+ if (setClientRules.find(vbinfo.name) == setClientRules.end()) {
+ // Not supported by the client; make sure it's safe to proceed
+ if (!vbinfo.gbt_force) {
+ // If we do anything other than throw an exception here, be sure version/force isn't sent to old clients
+ throw JSONRPCError(RPC_INVALID_PARAMETER, strprintf("Support for '%s' rule requires explicit client support", vbinfo.name));
+ }
+ }
+ 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)));
+
+ if (nMaxVersionPreVB >= 2) {
+ // If VB is supported by the client, nMaxVersionPreVB is -1, so we won't get here
+ // Because BIP 34 changed how the generation transaction is serialised, we can only use version/force back to v2 blocks
+ // This is safe to do [otherwise-]unconditionally only because we are throwing an exception above if a non-force deployment gets activated
+ // Note that this can probably also be removed entirely after the first BIP9 non-force deployment (ie, probably segwit) gets activated
+ aMutable.push_back("version/force");
+ }
+
result.push_back(Pair("previousblockhash", pblock->hashPrevBlock.GetHex()));
result.push_back(Pair("transactions", transactions));
result.push_back(Pair("coinbaseaux", aux));
diff --git a/src/versionbits.cpp b/src/versionbits.cpp
index fbb60c0fc5..c06c9907be 100644
--- a/src/versionbits.cpp
+++ b/src/versionbits.cpp
@@ -4,6 +4,19 @@
#include "versionbits.h"
+#include "consensus/params.h"
+
+const struct BIP9DeploymentInfo VersionBitsDeploymentInfo[Consensus::MAX_VERSION_BITS_DEPLOYMENTS] = {
+ {
+ /*.name =*/ "testdummy",
+ /*.gbt_force =*/ true,
+ },
+ {
+ /*.name =*/ "csv",
+ /*.gbt_force =*/ true,
+ }
+};
+
ThresholdState AbstractThresholdConditionChecker::GetStateFor(const CBlockIndex* pindexPrev, const Consensus::Params& params, ThresholdConditionCache& cache) const
{
int nPeriod = Period(params);
diff --git a/src/versionbits.h b/src/versionbits.h
index 04f4738272..ede2dcdda8 100644
--- a/src/versionbits.h
+++ b/src/versionbits.h
@@ -30,6 +30,15 @@ enum ThresholdState {
// will either be NULL or a block with (height + 1) % Period() == 0.
typedef std::map<const CBlockIndex*, ThresholdState> ThresholdConditionCache;
+struct BIP9DeploymentInfo {
+ /** Deployment name */
+ const char *name;
+ /** Whether GBT clients can safely ignore this rule in simplified usage */
+ bool gbt_force;
+};
+
+extern const struct BIP9DeploymentInfo VersionBitsDeploymentInfo[];
+
/**
* Abstract class that implements BIP9-style threshold logic, and caches results.
*/
generated by cgit v1.2.3 (git 2.26.2) at 2024-11-05 07:14:00 +0000