// Copyright (c) 2010 Satoshi Nakamoto // Copyright (c) 2009-2018 The Bitcoin Core developers // Distributed under the MIT software license, see the accompanying // file COPYING or http://www.opensource.org/licenses/mit-license.php. #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include unsigned int ParseConfirmTarget(const UniValue& value) { int target = value.get_int(); unsigned int max_target = ::feeEstimator.HighestTargetTracked(FeeEstimateHorizon::LONG_HALFLIFE); if (target < 1 || (unsigned int)target > max_target) { throw JSONRPCError(RPC_INVALID_PARAMETER, strprintf("Invalid conf_target, must be between %u - %u", 1, max_target)); } return (unsigned int)target; } /** * 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. */ static UniValue GetNetworkHashPS(int lookup, int height) { CBlockIndex *pb = chainActive.Tip(); if (height >= 0 && height < chainActive.Height()) pb = chainActive[height]; if (pb == nullptr || !pb->nHeight) return 0; // If lookup is -1, then use blocks since last difficulty change. if (lookup <= 0) lookup = pb->nHeight % Params().GetConsensus().DifficultyAdjustmentInterval() + 1; // If lookup is larger than chain, then set it to chain length. if (lookup > pb->nHeight) lookup = pb->nHeight; CBlockIndex *pb0 = pb; int64_t minTime = pb0->GetBlockTime(); int64_t maxTime = minTime; for (int i = 0; i < lookup; i++) { pb0 = pb0->pprev; int64_t 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; arith_uint256 workDiff = pb->nChainWork - pb0->nChainWork; int64_t timeDiff = maxTime - minTime; return workDiff.getdouble() / timeDiff; } static UniValue getnetworkhashps(const JSONRPCRequest& request) { if (request.fHelp || request.params.size() > 2) throw std::runtime_error( "getnetworkhashps ( nblocks height )\n" "\nReturns the estimated network hashes per second based on the last n 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.\n" "\nArguments:\n" "1. nblocks (numeric, optional, default=120) The number of blocks, or -1 for blocks since last difficulty change.\n" "2. height (numeric, optional, default=-1) To estimate at the time of the given height.\n" "\nResult:\n" "x (numeric) Hashes per second estimated\n" "\nExamples:\n" + HelpExampleCli("getnetworkhashps", "") + HelpExampleRpc("getnetworkhashps", "") ); LOCK(cs_main); return GetNetworkHashPS(!request.params[0].isNull() ? request.params[0].get_int() : 120, !request.params[1].isNull() ? request.params[1].get_int() : -1); } UniValue generateBlocks(std::shared_ptr coinbaseScript, int nGenerate, uint64_t nMaxTries, bool keepScript) { static const int nInnerLoopCount = 0x10000; int nHeightEnd = 0; int nHeight = 0; { // Don't keep cs_main locked LOCK(cs_main); nHeight = chainActive.Height(); nHeightEnd = nHeight+nGenerate; } unsigned int nExtraNonce = 0; UniValue blockHashes(UniValue::VARR); while (nHeight < nHeightEnd && !ShutdownRequested()) { std::unique_ptr pblocktemplate(BlockAssembler(Params()).CreateNewBlock(coinbaseScript->reserveScript)); if (!pblocktemplate.get()) throw JSONRPCError(RPC_INTERNAL_ERROR, "Couldn't create new block"); CBlock *pblock = &pblocktemplate->block; { LOCK(cs_main); IncrementExtraNonce(pblock, chainActive.Tip(), nExtraNonce); } while (nMaxTries > 0 && pblock->nNonce < nInnerLoopCount && !CheckProofOfWork(pblock->GetHash(), pblock->nBits, Params().GetConsensus())) { ++pblock->nNonce; --nMaxTries; } if (nMaxTries == 0) { break; } if (pblock->nNonce == nInnerLoopCount) { continue; } std::shared_ptr shared_pblock = std::make_shared(*pblock); if (!ProcessNewBlock(Params(), shared_pblock, true, nullptr)) throw JSONRPCError(RPC_INTERNAL_ERROR, "ProcessNewBlock, block not accepted"); ++nHeight; blockHashes.push_back(pblock->GetHash().GetHex()); //mark script as important because it was used at least for one coinbase output if the script came from the wallet if (keepScript) { coinbaseScript->KeepScript(); } } return blockHashes; } static UniValue generatetoaddress(const JSONRPCRequest& request) { if (request.fHelp || request.params.size() < 2 || request.params.size() > 3) throw std::runtime_error( "generatetoaddress nblocks address (maxtries)\n" "\nMine blocks immediately to a specified address (before the RPC call returns)\n" "\nArguments:\n" "1. nblocks (numeric, required) How many blocks are generated immediately.\n" "2. address (string, required) The address to send the newly generated bitcoin to.\n" "3. maxtries (numeric, optional) How many iterations to try (default = 1000000).\n" "\nResult:\n" "[ blockhashes ] (array) hashes of blocks generated\n" "\nExamples:\n" "\nGenerate 11 blocks to myaddress\n" + HelpExampleCli("generatetoaddress", "11 \"myaddress\"") ); int nGenerate = request.params[0].get_int(); uint64_t nMaxTries = 1000000; if (!request.params[2].isNull()) { nMaxTries = request.params[2].get_int(); } CTxDestination destination = DecodeDestination(request.params[1].get_str()); if (!IsValidDestination(destination)) { throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Error: Invalid address"); } std::shared_ptr coinbaseScript = std::make_shared(); coinbaseScript->reserveScript = GetScriptForDestination(destination); return generateBlocks(coinbaseScript, nGenerate, nMaxTries, false); } static UniValue getmininginfo(const JSONRPCRequest& request) { if (request.fHelp || request.params.size() != 0) throw std::runtime_error( "getmininginfo\n" "\nReturns a json object containing mining-related information." "\nResult:\n" "{\n" " \"blocks\": nnn, (numeric) The current block\n" " \"currentblockweight\": nnn, (numeric) The last block weight\n" " \"currentblocktx\": nnn, (numeric) The last block transaction\n" " \"difficulty\": xxx.xxxxx (numeric) The current difficulty\n" " \"networkhashps\": nnn, (numeric) The network hashes per second\n" " \"pooledtx\": n (numeric) The size of the mempool\n" " \"chain\": \"xxxx\", (string) current network name as defined in BIP70 (main, test, regtest)\n" " \"warnings\": \"...\" (string) any network and blockchain warnings\n" "}\n" "\nExamples:\n" + HelpExampleCli("getmininginfo", "") + HelpExampleRpc("getmininginfo", "") ); LOCK(cs_main); UniValue obj(UniValue::VOBJ); obj.pushKV("blocks", (int)chainActive.Height()); obj.pushKV("currentblockweight", (uint64_t)nLastBlockWeight); obj.pushKV("currentblocktx", (uint64_t)nLastBlockTx); obj.pushKV("difficulty", (double)GetDifficulty(chainActive.Tip())); obj.pushKV("networkhashps", getnetworkhashps(request)); obj.pushKV("pooledtx", (uint64_t)mempool.size()); obj.pushKV("chain", Params().NetworkIDString()); obj.pushKV("warnings", GetWarnings("statusbar")); return obj; } // NOTE: Unlike wallet RPC (which use BTC values), mining RPCs follow GBT (BIP 22) in using satoshi amounts static UniValue prioritisetransaction(const JSONRPCRequest& request) { if (request.fHelp || request.params.size() != 3) throw std::runtime_error( "prioritisetransaction \n" "Accepts the transaction into mined blocks at a higher (or lower) priority\n" "\nArguments:\n" "1. \"txid\" (string, required) The transaction id.\n" "2. dummy (numeric, optional) API-Compatibility for previous API. Must be zero or null.\n" " DEPRECATED. For forward compatibility use named arguments and omit this parameter.\n" "3. fee_delta (numeric, required) The fee value (in satoshis) to add (or subtract, if negative).\n" " Note, that this value is not a fee rate. It is a value to modify absolute fee of the TX.\n" " The fee is not actually paid, only the algorithm for selecting transactions into a block\n" " considers the transaction as it would have paid a higher (or lower) fee.\n" "\nResult:\n" "true (boolean) Returns true\n" "\nExamples:\n" + HelpExampleCli("prioritisetransaction", "\"txid\" 0.0 10000") + HelpExampleRpc("prioritisetransaction", "\"txid\", 0.0, 10000") ); LOCK(cs_main); uint256 hash(ParseHashV(request.params[0], "txid")); CAmount nAmount = request.params[2].get_int64(); if (!(request.params[1].isNull() || request.params[1].get_real() == 0)) { throw JSONRPCError(RPC_INVALID_PARAMETER, "Priority is no longer supported, dummy argument to prioritisetransaction must be 0."); } mempool.PrioritiseTransaction(hash, nAmount); return true; } // NOTE: Assumes a conclusive result; if result is inconclusive, it must be handled by caller static UniValue BIP22ValidationResult(const CValidationState& state) { if (state.IsValid()) return NullUniValue; if (state.IsError()) throw JSONRPCError(RPC_VERIFY_ERROR, FormatStateMessage(state)); if (state.IsInvalid()) { std::string strRejectReason = state.GetRejectReason(); if (strRejectReason.empty()) return "rejected"; return strRejectReason; } // Should be impossible return "valid?"; } static std::string gbt_vb_name(const Consensus::DeploymentPos pos) { const struct VBDeploymentInfo& vbinfo = VersionBitsDeploymentInfo[pos]; std::string s = vbinfo.name; if (!vbinfo.gbt_force) { s.insert(s.begin(), '!'); } return s; } static UniValue getblocktemplate(const JSONRPCRequest& request) { if (request.fHelp || request.params.size() > 1) throw std::runtime_error( "getblocktemplate ( TemplateRequest )\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" "For full specification, see BIPs 22, 23, 9, and 145:\n" " https://github.com/bitcoin/bips/blob/master/bip-0022.mediawiki\n" " https://github.com/bitcoin/bips/blob/master/bip-0023.mediawiki\n" " https://github.com/bitcoin/bips/blob/master/bip-0009.mediawiki#getblocktemplate_changes\n" " https://github.com/bitcoin/bips/blob/master/bip-0145.mediawiki\n" "\nArguments:\n" "1. template_request (json object, optional) A json object in the following spec\n" " {\n" " \"mode\":\"template\" (string, optional) This must be set to \"template\", \"proposal\" (see BIP 23), or omitted\n" " \"capabilities\":[ (array, optional) A list of strings\n" " \"support\" (string) client side supported feature, 'longpoll', 'coinbasetxn', 'coinbasevalue', 'proposal', 'serverlist', 'workid'\n" " ,...\n" " ],\n" " \"rules\":[ (array, optional) A list of strings\n" " \"support\" (string) client side supported softfork deployment\n" " ,...\n" " ]\n" " }\n" "\n" "\nResult:\n" "{\n" " \"version\" : n, (numeric) The preferred 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" " \"data\" : \"xxxx\", (string) transaction data encoded in hexadecimal (byte-for-byte)\n" " \"txid\" : \"xxxx\", (string) transaction id encoded in little-endian hexadecimal\n" " \"hash\" : \"xxxx\", (string) hash encoded in little-endian hexadecimal (including witness data)\n" " \"depends\" : [ (array) array of numbers \n" " n (numeric) transactions before this one (by 1-based index in 'transactions' list) that must be present in the final block if this one is\n" " ,...\n" " ],\n" " \"fee\": n, (numeric) difference in value between transaction inputs and outputs (in satoshis); for coinbase transactions, this is a negative Number of the total collected block fees (ie, not including the block subsidy); if key is not present, fee is unknown and clients MUST NOT assume there isn't one\n" " \"sigops\" : n, (numeric) total SigOps cost, as counted for purposes of block limits; if key is not present, sigop cost is unknown and clients MUST NOT assume it is zero\n" " \"weight\" : n, (numeric) total transaction weight, as counted for purposes of block limits\n" " }\n" " ,...\n" " ],\n" " \"coinbaseaux\" : { (json object) data that should be included in the coinbase's scriptSig content\n" " \"flags\" : \"xx\" (string) key name is to be ignored, and value included in scriptSig\n" " },\n" " \"coinbasevalue\" : n, (numeric) maximum allowable input to coinbase transaction, including the generation award and transaction fees (in satoshis)\n" " \"coinbasetxn\" : { ... }, (json object) information for coinbase transaction\n" " \"target\" : \"xxxx\", (string) The hash target\n" " \"mintime\" : xxx, (numeric) The minimum timestamp appropriate for next block time in seconds since epoch (Jan 1 1970 GMT)\n" " \"mutable\" : [ (array of string) list of ways the block template may be changed \n" " \"value\" (string) A way the block template may be changed, e.g. 'time', 'transactions', 'prevblock'\n" " ,...\n" " ],\n" " \"noncerange\" : \"00000000ffffffff\",(string) A range of valid nonces\n" " \"sigoplimit\" : n, (numeric) limit of sigops in blocks\n" " \"sizelimit\" : n, (numeric) limit of block size\n" " \"weightlimit\" : n, (numeric) limit of block weight\n" " \"curtime\" : ttt, (numeric) current timestamp in seconds since epoch (Jan 1 1970 GMT)\n" " \"bits\" : \"xxxxxxxx\", (string) compressed target of next block\n" " \"height\" : n (numeric) The height of the next block\n" "}\n" "\nExamples:\n" + HelpExampleCli("getblocktemplate", "") + HelpExampleRpc("getblocktemplate", "") ); LOCK(cs_main); std::string strMode = "template"; UniValue lpval = NullUniValue; std::set setClientRules; int64_t nMaxVersionPreVB = -1; if (!request.params[0].isNull()) { const UniValue& oparam = request.params[0].get_obj(); const UniValue& modeval = find_value(oparam, "mode"); if (modeval.isStr()) strMode = modeval.get_str(); else if (modeval.isNull()) { /* Do nothing */ } else throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid mode"); lpval = find_value(oparam, "longpollid"); if (strMode == "proposal") { const UniValue& dataval = find_value(oparam, "data"); if (!dataval.isStr()) throw JSONRPCError(RPC_TYPE_ERROR, "Missing data String key for proposal"); CBlock block; if (!DecodeHexBlk(block, dataval.get_str())) throw JSONRPCError(RPC_DESERIALIZATION_ERROR, "Block decode failed"); uint256 hash = block.GetHash(); const CBlockIndex* pindex = LookupBlockIndex(hash); if (pindex) { if (pindex->IsValid(BLOCK_VALID_SCRIPTS)) return "duplicate"; if (pindex->nStatus & BLOCK_FAILED_MASK) return "duplicate-invalid"; return "duplicate-inconclusive"; } CBlockIndex* const pindexPrev = chainActive.Tip(); // TestBlockValidity only supports blocks built on the current Tip if (block.hashPrevBlock != pindexPrev->GetBlockHash()) return "inconclusive-not-best-prevblk"; CValidationState state; 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") throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid mode"); if(!g_connman) throw JSONRPCError(RPC_CLIENT_P2P_DISABLED, "Error: Peer-to-peer functionality missing or disabled"); if (g_connman->GetNodeCount(CConnman::CONNECTIONS_ALL) == 0) throw JSONRPCError(RPC_CLIENT_NOT_CONNECTED, "Bitcoin is not connected!"); if (IsInitialBlockDownload()) throw JSONRPCError(RPC_CLIENT_IN_INITIAL_DOWNLOAD, "Bitcoin is downloading blocks..."); static unsigned int nTransactionsUpdatedLast; if (!lpval.isNull()) { // Wait to respond until either the best block changes, OR a minute has passed and there are more transactions uint256 hashWatchedChain; std::chrono::steady_clock::time_point checktxtime; unsigned int nTransactionsUpdatedLastLP; if (lpval.isStr()) { // Format: std::string lpstr = lpval.get_str(); hashWatchedChain = ParseHashV(lpstr.substr(0, 64), "longpollid"); nTransactionsUpdatedLastLP = atoi64(lpstr.substr(64)); } else { // NOTE: Spec does not specify behaviour for non-string longpollid, but this makes testing easier hashWatchedChain = chainActive.Tip()->GetBlockHash(); nTransactionsUpdatedLastLP = nTransactionsUpdatedLast; } // Release the wallet and main lock while waiting LEAVE_CRITICAL_SECTION(cs_main); { checktxtime = std::chrono::steady_clock::now() + std::chrono::minutes(1); WAIT_LOCK(g_best_block_mutex, lock); while (g_best_block == hashWatchedChain && IsRPCRunning()) { if (g_best_block_cv.wait_until(lock, checktxtime) == std::cv_status::timeout) { // Timeout: Check transactions for update if (mempool.GetTransactionsUpdated() != nTransactionsUpdatedLastLP) break; checktxtime += std::chrono::seconds(10); } } } ENTER_CRITICAL_SECTION(cs_main); if (!IsRPCRunning()) throw JSONRPCError(RPC_CLIENT_NOT_CONNECTED, "Shutting down"); // TODO: Maybe recheck connections/IBD and (if something wrong) send an expires-immediately template to stop miners? } const struct VBDeploymentInfo& segwit_info = VersionBitsDeploymentInfo[Consensus::DEPLOYMENT_SEGWIT]; // If the caller is indicating segwit support, then allow CreateNewBlock() // to select witness transactions, after segwit activates (otherwise // don't). bool fSupportsSegwit = setClientRules.find(segwit_info.name) != setClientRules.end(); // Update block static CBlockIndex* pindexPrev; static int64_t nStart; static std::unique_ptr pblocktemplate; // Cache whether the last invocation was with segwit support, to avoid returning // a segwit-block to a non-segwit caller. static bool fLastTemplateSupportsSegwit = true; if (pindexPrev != chainActive.Tip() || (mempool.GetTransactionsUpdated() != nTransactionsUpdatedLast && GetTime() - nStart > 5) || fLastTemplateSupportsSegwit != fSupportsSegwit) { // Clear pindexPrev so future calls make a new block, despite any failures from here on pindexPrev = nullptr; // Store the pindexBest used before CreateNewBlock, to avoid races nTransactionsUpdatedLast = mempool.GetTransactionsUpdated(); CBlockIndex* pindexPrevNew = chainActive.Tip(); nStart = GetTime(); fLastTemplateSupportsSegwit = fSupportsSegwit; // Create new block CScript scriptDummy = CScript() << OP_TRUE; pblocktemplate = BlockAssembler(Params()).CreateNewBlock(scriptDummy, fSupportsSegwit); if (!pblocktemplate) throw JSONRPCError(RPC_OUT_OF_MEMORY, "Out of memory"); // Need to update only after we know CreateNewBlock succeeded pindexPrev = pindexPrevNew; } assert(pindexPrev); CBlock* pblock = &pblocktemplate->block; // pointer for convenience const Consensus::Params& consensusParams = Params().GetConsensus(); // Update nTime UpdateTime(pblock, consensusParams, pindexPrev); pblock->nNonce = 0; // NOTE: If at some point we support pre-segwit miners post-segwit-activation, this needs to take segwit support into consideration const bool fPreSegWit = (ThresholdState::ACTIVE != VersionBitsState(pindexPrev, consensusParams, Consensus::DEPLOYMENT_SEGWIT, versionbitscache)); UniValue aCaps(UniValue::VARR); aCaps.push_back("proposal"); UniValue transactions(UniValue::VARR); std::map setTxIndex; int i = 0; for (const auto& it : pblock->vtx) { const CTransaction& tx = *it; uint256 txHash = tx.GetHash(); setTxIndex[txHash] = i++; if (tx.IsCoinBase()) continue; UniValue entry(UniValue::VOBJ); entry.pushKV("data", EncodeHexTx(tx)); entry.pushKV("txid", txHash.GetHex()); entry.pushKV("hash", tx.GetWitnessHash().GetHex()); UniValue deps(UniValue::VARR); for (const CTxIn &in : tx.vin) { if (setTxIndex.count(in.prevout.hash)) deps.push_back(setTxIndex[in.prevout.hash]); } entry.pushKV("depends", deps); int index_in_template = i - 1; entry.pushKV("fee", pblocktemplate->vTxFees[index_in_template]); int64_t nTxSigOps = pblocktemplate->vTxSigOpsCost[index_in_template]; if (fPreSegWit) { assert(nTxSigOps % WITNESS_SCALE_FACTOR == 0); nTxSigOps /= WITNESS_SCALE_FACTOR; } entry.pushKV("sigops", nTxSigOps); entry.pushKV("weight", GetTransactionWeight(tx)); transactions.push_back(entry); } UniValue aux(UniValue::VOBJ); aux.pushKV("flags", HexStr(COINBASE_FLAGS.begin(), COINBASE_FLAGS.end())); arith_uint256 hashTarget = arith_uint256().SetCompact(pblock->nBits); UniValue aMutable(UniValue::VARR); aMutable.push_back("time"); aMutable.push_back("transactions"); aMutable.push_back("prevblock"); UniValue result(UniValue::VOBJ); result.pushKV("capabilities", aCaps); UniValue aRules(UniValue::VARR); UniValue vbavailable(UniValue::VOBJ); for (int j = 0; j < (int)Consensus::MAX_VERSION_BITS_DEPLOYMENTS; ++j) { Consensus::DeploymentPos pos = Consensus::DeploymentPos(j); ThresholdState state = VersionBitsState(pindexPrev, consensusParams, pos, versionbitscache); switch (state) { case ThresholdState::DEFINED: case ThresholdState::FAILED: // Not exposed to GBT at all break; case ThresholdState::LOCKED_IN: // Ensure bit is set in block version pblock->nVersion |= VersionBitsMask(consensusParams, pos); // FALL THROUGH to get vbavailable set... case ThresholdState::STARTED: { const struct VBDeploymentInfo& vbinfo = VersionBitsDeploymentInfo[pos]; vbavailable.pushKV(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 ThresholdState::ACTIVE: { // Add to rules only const struct VBDeploymentInfo& 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.pushKV("version", pblock->nVersion); result.pushKV("rules", aRules); result.pushKV("vbavailable", vbavailable); result.pushKV("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 serialized, 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.pushKV("previousblockhash", pblock->hashPrevBlock.GetHex()); result.pushKV("transactions", transactions); result.pushKV("coinbaseaux", aux); result.pushKV("coinbasevalue", (int64_t)pblock->vtx[0]->vout[0].nValue); result.pushKV("longpollid", chainActive.Tip()->GetBlockHash().GetHex() + i64tostr(nTransactionsUpdatedLast)); result.pushKV("target", hashTarget.GetHex()); result.pushKV("mintime", (int64_t)pindexPrev->GetMedianTimePast()+1); result.pushKV("mutable", aMutable); result.pushKV("noncerange", "00000000ffffffff"); int64_t nSigOpLimit = MAX_BLOCK_SIGOPS_COST; int64_t nSizeLimit = MAX_BLOCK_SERIALIZED_SIZE; if (fPreSegWit) { assert(nSigOpLimit % WITNESS_SCALE_FACTOR == 0); nSigOpLimit /= WITNESS_SCALE_FACTOR; assert(nSizeLimit % WITNESS_SCALE_FACTOR == 0); nSizeLimit /= WITNESS_SCALE_FACTOR; } result.pushKV("sigoplimit", nSigOpLimit); result.pushKV("sizelimit", nSizeLimit); if (!fPreSegWit) { result.pushKV("weightlimit", (int64_t)MAX_BLOCK_WEIGHT); } result.pushKV("curtime", pblock->GetBlockTime()); result.pushKV("bits", strprintf("%08x", pblock->nBits)); result.pushKV("height", (int64_t)(pindexPrev->nHeight+1)); if (!pblocktemplate->vchCoinbaseCommitment.empty() && fSupportsSegwit) { result.pushKV("default_witness_commitment", HexStr(pblocktemplate->vchCoinbaseCommitment.begin(), pblocktemplate->vchCoinbaseCommitment.end())); } return result; } class submitblock_StateCatcher : public CValidationInterface { public: uint256 hash; bool found; CValidationState state; explicit submitblock_StateCatcher(const uint256 &hashIn) : hash(hashIn), found(false), state() {} protected: void BlockChecked(const CBlock& block, const CValidationState& stateIn) override { if (block.GetHash() != hash) return; found = true; state = stateIn; } }; static UniValue submitblock(const JSONRPCRequest& request) { // We allow 2 arguments for compliance with BIP22. Argument 2 is ignored. if (request.fHelp || request.params.size() < 1 || request.params.size() > 2) { throw std::runtime_error( "submitblock \"hexdata\" ( \"dummy\" )\n" "\nAttempts to submit new block to network.\n" "See https://en.bitcoin.it/wiki/BIP_0022 for full specification.\n" "\nArguments\n" "1. \"hexdata\" (string, required) the hex-encoded block data to submit\n" "2. \"dummy\" (optional) dummy value, for compatibility with BIP22. This value is ignored.\n" "\nResult:\n" "\nExamples:\n" + HelpExampleCli("submitblock", "\"mydata\"") + HelpExampleRpc("submitblock", "\"mydata\"") ); } std::shared_ptr blockptr = std::make_shared(); CBlock& block = *blockptr; if (!DecodeHexBlk(block, request.params[0].get_str())) { throw JSONRPCError(RPC_DESERIALIZATION_ERROR, "Block decode failed"); } if (block.vtx.empty() || !block.vtx[0]->IsCoinBase()) { throw JSONRPCError(RPC_DESERIALIZATION_ERROR, "Block does not start with a coinbase"); } uint256 hash = block.GetHash(); { LOCK(cs_main); const CBlockIndex* pindex = LookupBlockIndex(hash); if (pindex) { if (pindex->IsValid(BLOCK_VALID_SCRIPTS)) { return "duplicate"; } if (pindex->nStatus & BLOCK_FAILED_MASK) { return "duplicate-invalid"; } } } { LOCK(cs_main); const CBlockIndex* pindex = LookupBlockIndex(block.hashPrevBlock); if (pindex) { UpdateUncommittedBlockStructures(block, pindex, Params().GetConsensus()); } } bool new_block; submitblock_StateCatcher sc(block.GetHash()); RegisterValidationInterface(&sc); bool accepted = ProcessNewBlock(Params(), blockptr, /* fForceProcessing */ true, /* fNewBlock */ &new_block); UnregisterValidationInterface(&sc); if (!new_block && accepted) { return "duplicate"; } if (!sc.found) { return "inconclusive"; } return BIP22ValidationResult(sc.state); } static UniValue submitheader(const JSONRPCRequest& request) { if (request.fHelp || request.params.size() != 1) { throw std::runtime_error( "submitheader \"hexdata\"\n" "\nDecode the given hexdata as a header and submit it as a candidate chain tip if valid." "\nThrows when the header is invalid.\n" "\nArguments\n" "1. \"hexdata\" (string, required) the hex-encoded block header data\n" "\nResult:\n" "None" "\nExamples:\n" + HelpExampleCli("submitheader", "\"aabbcc\"") + HelpExampleRpc("submitheader", "\"aabbcc\"")); } CBlockHeader h; if (!DecodeHexBlockHeader(h, request.params[0].get_str())) { throw JSONRPCError(RPC_DESERIALIZATION_ERROR, "Block header decode failed"); } { LOCK(cs_main); if (!LookupBlockIndex(h.hashPrevBlock)) { throw JSONRPCError(RPC_VERIFY_ERROR, "Must submit previous header (" + h.hashPrevBlock.GetHex() + ") first"); } } CValidationState state; ProcessNewBlockHeaders({h}, state, Params(), /* ppindex */ nullptr, /* first_invalid */ nullptr); if (state.IsValid()) return NullUniValue; if (state.IsError()) { throw JSONRPCError(RPC_VERIFY_ERROR, FormatStateMessage(state)); } throw JSONRPCError(RPC_VERIFY_ERROR, state.GetRejectReason()); } static UniValue estimatesmartfee(const JSONRPCRequest& request) { if (request.fHelp || request.params.size() < 1 || request.params.size() > 2) throw std::runtime_error( "estimatesmartfee conf_target (\"estimate_mode\")\n" "\nEstimates the approximate fee per kilobyte needed for a transaction to begin\n" "confirmation within conf_target blocks if possible and return the number of blocks\n" "for which the estimate is valid. Uses virtual transaction size as defined\n" "in BIP 141 (witness data is discounted).\n" "\nArguments:\n" "1. conf_target (numeric) Confirmation target in blocks (1 - 1008)\n" "2. \"estimate_mode\" (string, optional, default=CONSERVATIVE) The fee estimate mode.\n" " Whether to return a more conservative estimate which also satisfies\n" " a longer history. A conservative estimate potentially returns a\n" " higher feerate and is more likely to be sufficient for the desired\n" " target, but is not as responsive to short term drops in the\n" " prevailing fee market. Must be one of:\n" " \"UNSET\" (defaults to CONSERVATIVE)\n" " \"ECONOMICAL\"\n" " \"CONSERVATIVE\"\n" "\nResult:\n" "{\n" " \"feerate\" : x.x, (numeric, optional) estimate fee rate in " + CURRENCY_UNIT + "/kB\n" " \"errors\": [ str... ] (json array of strings, optional) Errors encountered during processing\n" " \"blocks\" : n (numeric) block number where estimate was found\n" "}\n" "\n" "The request target will be clamped between 2 and the highest target\n" "fee estimation is able to return based on how long it has been running.\n" "An error is returned if not enough transactions and blocks\n" "have been observed to make an estimate for any number of blocks.\n" "\nExample:\n" + HelpExampleCli("estimatesmartfee", "6") ); RPCTypeCheck(request.params, {UniValue::VNUM, UniValue::VSTR}); RPCTypeCheckArgument(request.params[0], UniValue::VNUM); unsigned int conf_target = ParseConfirmTarget(request.params[0]); bool conservative = true; if (!request.params[1].isNull()) { FeeEstimateMode fee_mode; if (!FeeModeFromString(request.params[1].get_str(), fee_mode)) { throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid estimate_mode parameter"); } if (fee_mode == FeeEstimateMode::ECONOMICAL) conservative = false; } UniValue result(UniValue::VOBJ); UniValue errors(UniValue::VARR); FeeCalculation feeCalc; CFeeRate feeRate = ::feeEstimator.estimateSmartFee(conf_target, &feeCalc, conservative); if (feeRate != CFeeRate(0)) { result.pushKV("feerate", ValueFromAmount(feeRate.GetFeePerK())); } else { errors.push_back("Insufficient data or no feerate found"); result.pushKV("errors", errors); } result.pushKV("blocks", feeCalc.returnedTarget); return result; } static UniValue estimaterawfee(const JSONRPCRequest& request) { if (request.fHelp || request.params.size() < 1 || request.params.size() > 2) throw std::runtime_error( "estimaterawfee conf_target (threshold)\n" "\nWARNING: This interface is unstable and may disappear or change!\n" "\nWARNING: This is an advanced API call that is tightly coupled to the specific\n" " implementation of fee estimation. The parameters it can be called with\n" " and the results it returns will change if the internal implementation changes.\n" "\nEstimates the approximate fee per kilobyte needed for a transaction to begin\n" "confirmation within conf_target blocks if possible. Uses virtual transaction size as\n" "defined in BIP 141 (witness data is discounted).\n" "\nArguments:\n" "1. conf_target (numeric) Confirmation target in blocks (1 - 1008)\n" "2. threshold (numeric, optional) The proportion of transactions in a given feerate range that must have been\n" " confirmed within conf_target in order to consider those feerates as high enough and proceed to check\n" " lower buckets. Default: 0.95\n" "\nResult:\n" "{\n" " \"short\" : { (json object, optional) estimate for short time horizon\n" " \"feerate\" : x.x, (numeric, optional) estimate fee rate in " + CURRENCY_UNIT + "/kB\n" " \"decay\" : x.x, (numeric) exponential decay (per block) for historical moving average of confirmation data\n" " \"scale\" : x, (numeric) The resolution of confirmation targets at this time horizon\n" " \"pass\" : { (json object, optional) information about the lowest range of feerates to succeed in meeting the threshold\n" " \"startrange\" : x.x, (numeric) start of feerate range\n" " \"endrange\" : x.x, (numeric) end of feerate range\n" " \"withintarget\" : x.x, (numeric) number of txs over history horizon in the feerate range that were confirmed within target\n" " \"totalconfirmed\" : x.x, (numeric) number of txs over history horizon in the feerate range that were confirmed at any point\n" " \"inmempool\" : x.x, (numeric) current number of txs in mempool in the feerate range unconfirmed for at least target blocks\n" " \"leftmempool\" : x.x, (numeric) number of txs over history horizon in the feerate range that left mempool unconfirmed after target\n" " },\n" " \"fail\" : { ... }, (json object, optional) information about the highest range of feerates to fail to meet the threshold\n" " \"errors\": [ str... ] (json array of strings, optional) Errors encountered during processing\n" " },\n" " \"medium\" : { ... }, (json object, optional) estimate for medium time horizon\n" " \"long\" : { ... } (json object) estimate for long time horizon\n" "}\n" "\n" "Results are returned for any horizon which tracks blocks up to the confirmation target.\n" "\nExample:\n" + HelpExampleCli("estimaterawfee", "6 0.9") ); RPCTypeCheck(request.params, {UniValue::VNUM, UniValue::VNUM}, true); RPCTypeCheckArgument(request.params[0], UniValue::VNUM); unsigned int conf_target = ParseConfirmTarget(request.params[0]); double threshold = 0.95; if (!request.params[1].isNull()) { threshold = request.params[1].get_real(); } if (threshold < 0 || threshold > 1) { throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid threshold"); } UniValue result(UniValue::VOBJ); for (const FeeEstimateHorizon horizon : {FeeEstimateHorizon::SHORT_HALFLIFE, FeeEstimateHorizon::MED_HALFLIFE, FeeEstimateHorizon::LONG_HALFLIFE}) { CFeeRate feeRate; EstimationResult buckets; // Only output results for horizons which track the target if (conf_target > ::feeEstimator.HighestTargetTracked(horizon)) continue; feeRate = ::feeEstimator.estimateRawFee(conf_target, threshold, horizon, &buckets); UniValue horizon_result(UniValue::VOBJ); UniValue errors(UniValue::VARR); UniValue passbucket(UniValue::VOBJ); passbucket.pushKV("startrange", round(buckets.pass.start)); passbucket.pushKV("endrange", round(buckets.pass.end)); passbucket.pushKV("withintarget", round(buckets.pass.withinTarget * 100.0) / 100.0); passbucket.pushKV("totalconfirmed", round(buckets.pass.totalConfirmed * 100.0) / 100.0); passbucket.pushKV("inmempool", round(buckets.pass.inMempool * 100.0) / 100.0); passbucket.pushKV("leftmempool", round(buckets.pass.leftMempool * 100.0) / 100.0); UniValue failbucket(UniValue::VOBJ); failbucket.pushKV("startrange", round(buckets.fail.start)); failbucket.pushKV("endrange", round(buckets.fail.end)); failbucket.pushKV("withintarget", round(buckets.fail.withinTarget * 100.0) / 100.0); failbucket.pushKV("totalconfirmed", round(buckets.fail.totalConfirmed * 100.0) / 100.0); failbucket.pushKV("inmempool", round(buckets.fail.inMempool * 100.0) / 100.0); failbucket.pushKV("leftmempool", round(buckets.fail.leftMempool * 100.0) / 100.0); // CFeeRate(0) is used to indicate error as a return value from estimateRawFee if (feeRate != CFeeRate(0)) { horizon_result.pushKV("feerate", ValueFromAmount(feeRate.GetFeePerK())); horizon_result.pushKV("decay", buckets.decay); horizon_result.pushKV("scale", (int)buckets.scale); horizon_result.pushKV("pass", passbucket); // buckets.fail.start == -1 indicates that all buckets passed, there is no fail bucket to output if (buckets.fail.start != -1) horizon_result.pushKV("fail", failbucket); } else { // Output only information that is still meaningful in the event of error horizon_result.pushKV("decay", buckets.decay); horizon_result.pushKV("scale", (int)buckets.scale); horizon_result.pushKV("fail", failbucket); errors.push_back("Insufficient data or no feerate found which meets threshold"); horizon_result.pushKV("errors",errors); } result.pushKV(StringForFeeEstimateHorizon(horizon), horizon_result); } return result; } // clang-format off static const CRPCCommand commands[] = { // category name actor (function) argNames // --------------------- ------------------------ ----------------------- ---------- { "mining", "getnetworkhashps", &getnetworkhashps, {"nblocks","height"} }, { "mining", "getmininginfo", &getmininginfo, {} }, { "mining", "prioritisetransaction", &prioritisetransaction, {"txid","dummy","fee_delta"} }, { "mining", "getblocktemplate", &getblocktemplate, {"template_request"} }, { "mining", "submitblock", &submitblock, {"hexdata","dummy"} }, { "mining", "submitheader", &submitheader, {"hexdata"} }, { "generating", "generatetoaddress", &generatetoaddress, {"nblocks","address","maxtries"} }, { "util", "estimatesmartfee", &estimatesmartfee, {"conf_target", "estimate_mode"} }, { "hidden", "estimaterawfee", &estimaterawfee, {"conf_target", "threshold"} }, }; // clang-format on void RegisterMiningRPCCommands(CRPCTable &t) { for (unsigned int vcidx = 0; vcidx < ARRAYLEN(commands); vcidx++) t.appendCommand(commands[vcidx].name, &commands[vcidx]); }