rpcblockchain.cpp

// Copyright (c) 2010 Satoshi Nakamoto
// Copyright (c) 2009-2012 The Bitcoin developers
// Distributed under the MIT/X11 software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#include "rpcserver.h"
#include "main.h"

#include "sync.h"
#include "kernel.h"
#include "checkpoints.h"

#include <stdint.h>

#include "json/json_spirit_value.h"

using namespace json_spirit;
using namespace std;

extern void TxToJSON(const CTransaction& tx, const uint256 hashBlock, json_spirit::Object& entry);
extern enum Checkpoints::CPMode CheckpointsMode;

double GetDifficulty(const CBlockIndex* blockindex)
{
    // Floating point number that is a multiple of the minimum difficulty,
    // minimum difficulty = 1.0.
    if (blockindex == NULL)
    {
        if (pindexBest == NULL)
            return 1.0;
        else
            blockindex = GetLastBlockIndex(pindexBest, false);
    }

    int nShift = (blockindex->nBits >> 24) & 0xff;

    double dDiff =
        (double)0x0000ffff / (double)(blockindex->nBits & 0x00ffffff);

    while (nShift < 29)
    {
        dDiff *= 256.0;
        nShift++;
    }
    while (nShift > 29)
    {
        dDiff /= 256.0;
        nShift--;
    }

    return dDiff;
}

double GetPoWMHashPS()
{
    if (pindexBest->nHeight >= Params().LastPOWBlock())
        return 0;

    int nPoWInterval = 72;
    int64_t nTargetSpacingWorkMin = 30, nTargetSpacingWork = 30;

    CBlockIndex* pindex = pindexGenesisBlock;
    CBlockIndex* pindexPrevWork = pindexGenesisBlock;

    while (pindex)
    {
        if (pindex->IsProofOfWork())
        {
            int64_t nActualSpacingWork = pindex->GetBlockTime() - pindexPrevWork->GetBlockTime();
            nTargetSpacingWork = ((nPoWInterval - 1) * nTargetSpacingWork + nActualSpacingWork + nActualSpacingWork) / (nPoWInterval + 1);
            nTargetSpacingWork = max(nTargetSpacingWork, nTargetSpacingWorkMin);
            pindexPrevWork = pindex;
        }

        pindex = pindex->pnext;
    }

    return GetDifficulty() * 4294.967296 / nTargetSpacingWork;
}

double GetPoSKernelPS()
{
    int nPoSInterval = 72;
    double dStakeKernelsTriedAvg = 0;
    int nStakesHandled = 0, nStakesTime = 0;

    CBlockIndex* pindex = pindexBest;;
    CBlockIndex* pindexPrevStake = NULL;

    while (pindex && nStakesHandled < nPoSInterval)
    {
        if (pindex->IsProofOfStake())
        {
            if (pindexPrevStake)
            {
                dStakeKernelsTriedAvg += GetDifficulty(pindexPrevStake) * 4294967296.0;
                nStakesTime += pindexPrevStake->nTime - pindex->nTime;
                nStakesHandled++;
            }
            pindexPrevStake = pindex;
        }

        pindex = pindex->pprev;
    }

    double result = 0;

    if (nStakesTime)
        result = dStakeKernelsTriedAvg / nStakesTime;

    if (IsProtocolV2(nBestHeight))
        result *= STAKE_TIMESTAMP_MASK + 1;

    return result;
}

Object blockToJSON(const CBlock& block, const CBlockIndex* blockindex, bool fPrintTransactionDetail)
{
    Object result;
    result.push_back(Pair("hash", block.GetHash().GetHex()));
    int confirmations = -1;
    // Only report confirmations if the block is on the main chain
    if (blockindex->IsInMainChain())
        confirmations = nBestHeight - blockindex->nHeight + 1;
    result.push_back(Pair("confirmations", confirmations));
    result.push_back(Pair("size", (int)::GetSerializeSize(block, SER_NETWORK, PROTOCOL_VERSION)));
    result.push_back(Pair("height", blockindex->nHeight));
    result.push_back(Pair("version", block.nVersion));
    result.push_back(Pair("merkleroot", block.hashMerkleRoot.GetHex()));
    result.push_back(Pair("mint", ValueFromAmount(blockindex->nMint)));
    result.push_back(Pair("time", (int64_t)block.GetBlockTime()));
    result.push_back(Pair("nonce", (uint64_t)block.nNonce));
    result.push_back(Pair("bits", strprintf("%08x", block.nBits)));
    result.push_back(Pair("difficulty", GetDifficulty(blockindex)));
    result.push_back(Pair("blocktrust", leftTrim(blockindex->GetBlockTrust().GetHex(), '0')));
    result.push_back(Pair("chaintrust", leftTrim(blockindex->nChainTrust.GetHex(), '0')));
    if (blockindex->pprev)
        result.push_back(Pair("previousblockhash", blockindex->pprev->GetBlockHash().GetHex()));
    if (blockindex->pnext)
        result.push_back(Pair("nextblockhash", blockindex->pnext->GetBlockHash().GetHex()));

    result.push_back(Pair("flags", strprintf("%s%s", blockindex->IsProofOfStake()? "proof-of-stake" : "proof-of-work", blockindex->GeneratedStakeModifier()? " stake-modifier": "")));
    result.push_back(Pair("proofhash", blockindex->hashProof.GetHex()));
    result.push_back(Pair("entropybit", (int)blockindex->GetStakeEntropyBit()));
    result.push_back(Pair("modifier", strprintf("%016x", blockindex->nStakeModifier)));
    Array txinfo;
    BOOST_FOREACH (const CTransaction& tx, block.vtx)
    {
        if (fPrintTransactionDetail)
        {
            Object entry;

            entry.push_back(Pair("txid", tx.GetHash().GetHex()));
            TxToJSON(tx, 0, entry);

            txinfo.push_back(entry);
        }
        else
            txinfo.push_back(tx.GetHash().GetHex());
    }

    result.push_back(Pair("tx", txinfo));

    if (block.IsProofOfStake())
        result.push_back(Pair("signature", HexStr(block.vchBlockSig.begin(), block.vchBlockSig.end())));

    return result;
}

Value getbestblockhash(const Array& params, bool fHelp)
{
    if (fHelp || params.size() != 0)
        throw runtime_error(
            "getbestblockhash\n"
            "Returns the hash of the best block in the longest block chain.");

    return hashBestChain.GetHex();
}

Value getblockcount(const Array& params, bool fHelp)
{
    if (fHelp || params.size() != 0)
        throw runtime_error(
            "getblockcount\n"
            "Returns the number of blocks in the longest block chain.");

    return nBestHeight;
}


Value getdifficulty(const Array& params, bool fHelp)
{
    if (fHelp || params.size() != 0)
        throw runtime_error(
            "getdifficulty\n"
            "Returns the difficulty as a multiple of the minimum difficulty.");

    Object obj;
    obj.push_back(Pair("proof-of-work",        GetDifficulty()));
    obj.push_back(Pair("proof-of-stake",       GetDifficulty(GetLastBlockIndex(pindexBest, true))));
    return obj;
}


Value getrawmempool(const Array& params, bool fHelp)
{
    if (fHelp || params.size() != 0)
        throw runtime_error(
            "getrawmempool\n"
            "Returns all transaction ids in memory pool.");

    vector<uint256> vtxid;
    mempool.queryHashes(vtxid);

    Array a;
    BOOST_FOREACH(const uint256& hash, vtxid)
        a.push_back(hash.ToString());

    return a;
}

Value getblockhash(const Array& params, bool fHelp)
{
    if (fHelp || params.size() != 1)
        throw runtime_error(
            "getblockhash <index>\n"
            "Returns hash of block in best-block-chain at <index>.");

    int nHeight = params[0].get_int();
    if (nHeight < 0 || nHeight > nBestHeight)
        throw runtime_error("Block number out of range.");

    CBlockIndex* pblockindex = FindBlockByHeight(nHeight);
    return pblockindex->phashBlock->GetHex();
}

Value getblock(const Array& params, bool fHelp)
{
    if (fHelp || params.size() < 1 || params.size() > 2)
        throw runtime_error(
            "getblock <hash> [txinfo]\n"
            "txinfo optional to print more detailed tx info\n"
            "Returns details of a block with given block-hash.");

    std::string strHash = params[0].get_str();
    uint256 hash(strHash);

    if (mapBlockIndex.count(hash) == 0)
        throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Block not found");

    CBlock block;
    CBlockIndex* pblockindex = mapBlockIndex[hash];
    block.ReadFromDisk(pblockindex, true);

    return blockToJSON(block, pblockindex, params.size() > 1 ? params[1].get_bool() : false);
}

Value getblockbynumber(const Array& params, bool fHelp)
{
    if (fHelp || params.size() < 1 || params.size() > 2)
        throw runtime_error(
            "getblockbynumber <number> [txinfo]\n"
            "txinfo optional to print more detailed tx info\n"
            "Returns details of a block with given block-number.");

    int nHeight = params[0].get_int();
    if (nHeight < 0 || nHeight > nBestHeight)
        throw runtime_error("Block number out of range.");

    CBlock block;
    CBlockIndex* pblockindex = mapBlockIndex[hashBestChain];
    while (pblockindex->nHeight > nHeight)
        pblockindex = pblockindex->pprev;

    uint256 hash = *pblockindex->phashBlock;

    pblockindex = mapBlockIndex[hash];
    block.ReadFromDisk(pblockindex, true);

    return blockToJSON(block, pblockindex, params.size() > 1 ? params[1].get_bool() : false);
}

// ppcoin: get information of sync-checkpoint
Value getcheckpoint(const Array& params, bool fHelp)
{
    if (fHelp || params.size() != 0)
        throw runtime_error(
            "getcheckpoint\n"
            "Show info of synchronized checkpoint.\n");

    Object result;
    CBlockIndex* pindexCheckpoint;

    result.push_back(Pair("synccheckpoint", Checkpoints::hashSyncCheckpoint.ToString().c_str()));
    pindexCheckpoint = mapBlockIndex[Checkpoints::hashSyncCheckpoint];
    result.push_back(Pair("height", pindexCheckpoint->nHeight));
    result.push_back(Pair("timestamp", DateTimeStrFormat(pindexCheckpoint->GetBlockTime()).c_str()));

    // Check that the block satisfies synchronized checkpoint
    if (CheckpointsMode == Checkpoints::STRICT)
        result.push_back(Pair("policy", "strict"));

    if (CheckpointsMode == Checkpoints::ADVISORY)
        result.push_back(Pair("policy", "advisory"));

    if (CheckpointsMode == Checkpoints::PERMISSIVE)
        result.push_back(Pair("policy", "permissive"));

    if (mapArgs.count("-checkpointkey"))
        result.push_back(Pair("checkpointmaster", true));

    return result;
}

Value getblockchaininfo(const Array& params, bool fHelp)
{
    /** XXX Needs syncing */
    if (fHelp || params.size() != 0)
        throw runtime_error(
            "getblockchaininfo\n"
            "Returns an object containing various state info regarding block chain processing.\n"
            "\nResult:\n"
            "{\n"
            "  \"chain\": \"xxxx\",        (string) current chain (main, testnet3, regtest)\n"
    //        "  \"blocks\": xxxxxx,         (numeric) the current number of blocks processed in the server\n"
    //        "  \"bestblockhash\": \"...\", (string) the hash of the currently best block\n"
    //        "  \"difficulty\": xxxxxx,     (numeric) the current difficulty\n"
    //        "  \"verificationprogress\": xxxx, (numeric) estimate of verification progress [0..1]\n"
    //        "  \"chainwork\": \"xxxx\"     (string) total amount of work in active chain, in hexadecimal\n"
            "}\n"
            "\nExamples:\n"
            + HelpExampleCli("getblockchaininfo", "")
            + HelpExampleRpc("getblockchaininfo", "")
        );

    proxyType proxy;
    GetProxy(NET_IPV4, proxy);

    Object obj;
    std::string chain = Params().DataDir();
    if(chain.empty())
        chain = "main";
    obj.push_back(Pair("chain",         chain));
    //obj.push_back(Pair("blocks",        getblockcount()));
    //obj.push_back(Pair("bestblockhash", getbestblockhash()));
    //obj.push_back(Pair("difficulty",    (double)GetDifficulty()));
    // XXX obj.push_back(Pair("verificationprogress", Checkpoints::GuessVerificationProgress(chainActive.Tip())));
    // XXX obj.push_back(Pair("chainwork",     chainActive.Tip()->nChainWork.GetHex()));
    return obj;
}