Add 'invalidateblock' and 'reconsiderblock' RPC commands.

These can be used for testing reorganizations or for manual intervention in case of
chain forks.
This commit is contained in:
Pieter Wuille 2014-11-19 09:39:42 +01:00
parent 397b9011c9
commit 798faec3ea
5 changed files with 159 additions and 0 deletions

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@ -2132,6 +2132,79 @@ bool ActivateBestChain(CValidationState &state, CBlock *pblock) {
return true;
}
bool InvalidateBlock(CValidationState& state, CBlockIndex *pindex) {
AssertLockHeld(cs_main);
// Mark the block itself as invalid.
pindex->nStatus |= BLOCK_FAILED_VALID;
if (!pblocktree->WriteBlockIndex(CDiskBlockIndex(pindex))) {
return state.Abort("Failed to update block index");
}
setBlockIndexCandidates.erase(pindex);
while (chainActive.Contains(pindex)) {
CBlockIndex *pindexWalk = chainActive.Tip();
pindexWalk->nStatus |= BLOCK_FAILED_CHILD;
if (!pblocktree->WriteBlockIndex(CDiskBlockIndex(pindexWalk))) {
return state.Abort("Failed to update block index");
}
setBlockIndexCandidates.erase(pindexWalk);
// ActivateBestChain considers blocks already in chainActive
// unconditionally valid already, so force disconnect away from it.
if (!DisconnectTip(state)) {
return false;
}
}
// The resulting new best tip may not be in setBlockIndexCandidates anymore, so
// add them again.
BlockMap::iterator it = mapBlockIndex.begin();
while (it != mapBlockIndex.end()) {
if (it->second->IsValid(BLOCK_VALID_TRANSACTIONS) && it->second->nChainTx && setBlockIndexCandidates.value_comp()(chainActive.Tip(), it->second)) {
setBlockIndexCandidates.insert(pindex);
}
it++;
}
InvalidChainFound(pindex);
return true;
}
bool ReconsiderBlock(CValidationState& state, CBlockIndex *pindex) {
AssertLockHeld(cs_main);
int nHeight = pindex->nHeight;
// Remove the invalidity flag from this block and all its descendants.
BlockMap::iterator it = mapBlockIndex.begin();
while (it != mapBlockIndex.end()) {
if (!it->second->IsValid() && it->second->GetAncestor(nHeight) == pindex) {
it->second->nStatus &= ~BLOCK_FAILED_MASK;
if (!pblocktree->WriteBlockIndex(CDiskBlockIndex(pindex))) {
return state.Abort("Failed to update block index");
}
if (it->second->IsValid(BLOCK_VALID_TRANSACTIONS) && it->second->nChainTx && setBlockIndexCandidates.value_comp()(chainActive.Tip(), it->second)) {
setBlockIndexCandidates.insert(it->second);
}
if (it->second == pindexBestInvalid) {
// Reset invalid block marker if it was pointing to one of those.
pindexBestInvalid = NULL;
}
}
it++;
}
// Remove the invalidity flag from all ancestors too.
while (pindex != NULL) {
pindex->nStatus &= ~BLOCK_FAILED_MASK;
if (!pblocktree->WriteBlockIndex(CDiskBlockIndex(pindex))) {
return state.Abort("Failed to update block index");
}
pindex = pindex->pprev;
}
return true;
}
CBlockIndex* AddToBlockIndex(const CBlockHeader& block)
{
// Check for duplicate

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@ -609,6 +609,12 @@ public:
/** Find the last common block between the parameter chain and a locator. */
CBlockIndex* FindForkInGlobalIndex(const CChain& chain, const CBlockLocator& locator);
/** Mark a block as invalid. */
bool InvalidateBlock(CValidationState& state, CBlockIndex *pindex);
/** Remove invalidity status from a block and its descendants. */
bool ReconsiderBlock(CValidationState& state, CBlockIndex *pindex);
/** The currently-connected chain of blocks. */
extern CChain chainActive;

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@ -561,3 +561,79 @@ Value getmempoolinfo(const Array& params, bool fHelp)
return ret;
}
Value invalidateblock(const Array& params, bool fHelp)
{
if (fHelp || params.size() != 1)
throw runtime_error(
"invalidateblock \"hash\"\n"
"\nPermanently marks a block as invalid, as if it violated a consensus rule.\n"
"\nArguments:\n"
"1. hash (string, required) the hash of the block to mark as invalid\n"
"\nResult:\n"
"\nExamples:\n"
+ HelpExampleCli("invalidateblock", "\"blockhash\"")
+ HelpExampleRpc("invalidateblock", "\"blockhash\"")
);
std::string strHash = params[0].get_str();
uint256 hash(strHash);
CValidationState state;
{
LOCK(cs_main);
if (mapBlockIndex.count(hash) == 0)
throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Block not found");
CBlockIndex* pblockindex = mapBlockIndex[hash];
InvalidateBlock(state, pblockindex);
}
if (state.IsValid()) {
ActivateBestChain(state);
}
if (!state.IsValid()) {
throw JSONRPCError(RPC_DATABASE_ERROR, state.GetRejectReason());
}
return Value::null;
}
Value reconsiderblock(const Array& params, bool fHelp)
{
if (fHelp || params.size() != 1)
throw runtime_error(
"reconsiderblock \"hash\"\n"
"\nRemoves invalidity status of a block and its descendants, reconsider them for activation.\n"
"This can be used to undo the effects of invalidateblock.\n"
"\nArguments:\n"
"1. hash (string, required) the hash of the block to reconsider\n"
"\nResult:\n"
"\nExamples:\n"
+ HelpExampleCli("reconsiderblock", "\"blockhash\"")
+ HelpExampleRpc("reconsiderblock", "\"blockhash\"")
);
std::string strHash = params[0].get_str();
uint256 hash(strHash);
CValidationState state;
{
LOCK(cs_main);
if (mapBlockIndex.count(hash) == 0)
throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Block not found");
CBlockIndex* pblockindex = mapBlockIndex[hash];
ReconsiderBlock(state, pblockindex);
}
if (state.IsValid()) {
ActivateBestChain(state);
}
if (!state.IsValid()) {
throw JSONRPCError(RPC_DATABASE_ERROR, state.GetRejectReason());
}
return Value::null;
}

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@ -270,6 +270,8 @@ static const CRPCCommand vRPCCommands[] =
{ "blockchain", "gettxout", &gettxout, true, false, false },
{ "blockchain", "gettxoutsetinfo", &gettxoutsetinfo, true, false, false },
{ "blockchain", "verifychain", &verifychain, true, false, false },
{ "blockchain", "invalidateblock", &invalidateblock, true, true, false },
{ "blockchain", "reconsiderblock", &reconsiderblock, true, true, false },
/* Mining */
{ "mining", "getblocktemplate", &getblocktemplate, true, false, false },

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@ -219,6 +219,8 @@ extern json_spirit::Value gettxoutsetinfo(const json_spirit::Array& params, bool
extern json_spirit::Value gettxout(const json_spirit::Array& params, bool fHelp);
extern json_spirit::Value verifychain(const json_spirit::Array& params, bool fHelp);
extern json_spirit::Value getchaintips(const json_spirit::Array& params, bool fHelp);
extern json_spirit::Value invalidateblock(const json_spirit::Array& params, bool fHelp);
extern json_spirit::Value reconsiderblock(const json_spirit::Array& params, bool fHelp);
// in rest.cpp
extern bool HTTPReq_REST(AcceptedConnection *conn,