Function GetDifficulty

src/rpc/blockchain.cpp:59–95

Calculate the difficulty for a given block index. */

/* Calculate the difficulty for a given block index.
 */
double GetDifficulty(const CBlockIndex* blockindex)
{
    if (blockindex == nullptr)
    {
        return 1.0;
    }

    // Floating point number that is a multiple of the minimum difficulty,
    // minimum difficulty = 1.0.

    uint32_t bits = blockindex->nBits;
    uint32_t powLimit = 0;

    if (blockindex->nHeight >= Params().GetConsensus().BTGHeight) {
        powLimit = UintToArith256(Params().GetConsensus().powLimit).GetCompact();
    } else {
        powLimit = 0x1d00ffff;
    }

    int nShift = (bits >> 24) & 0xff;
    int nShiftAmount = (powLimit >> 24) & 0xff;

    double dDiff = (double)(powLimit & 0x00ffffff) / (double)(bits & 0x00ffffff);

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

    return dDiff;
}

UniValue blockheaderToJSON(const CBlockIndex* blockindex)
{