formulas.py 文件源码

def remaining_emission(N_tot, block_n):
    # TODO: This is more related to the way QRL works.. Move to another place
    """
    calculate remaining emission at block_n: N=total initial coin supply, coeff = decay constant
    need to use decimal as floating point not precise enough on different platforms..
    :param N_tot:
    :param block_n:
    :return:

    >>> remaining_emission(1, 1)
    Decimal('0.99999996')
    """
    # TODO: Verify these values and formula
    coeff = calc_coeff(config.dev.max_coin_supply, 420480000)

    # FIXME: Magic number? Unify
    return decimal.Decimal(N_tot * decimal.Decimal(-coeff * block_n).exp()) \
        .quantize(decimal.Decimal('1.00000000'), rounding=decimal.ROUND_HALF_UP)