# Pastebin tmHUV2sU
class CCoin {
public:
    CCoin()
    {
    }
    CCoin(const CWalletTx* walletTx, unsigned int i)
    {
        if (walletTx != nullptr && i < walletTx->tx->vout.size())
        {
            outpoint = COutPoint(walletTx->GetHash(), i);
            txout = walletTx->tx->vout[i];
        }
    }
    bool IsNull() const
    {
        return outpoint.IsNull() && txout.IsNull();
    }
    COutPoint outpoint;
    CTxOut txout;

    bool operator<(const CCoin &rhs) const {
        return outpoint < rhs.outpoint;
    }

    bool operator!=(const CCoin &rhs) const {
        return outpoint != rhs.outpoint;
    }

    bool operator==(const CCoin &rhs) const {
        return outpoint == rhs.outpoint;
    }
};