Dynamic INDY per epoch config

[karleitner]

Instead of the current static INDY constants:

indy-rewards/indy_rewards/config.py

Line 7 in c5da590

SP_EPOCH_INDY: Final[int] = 28768

Have a more dynamic config like:

SP_INDY_PER_EPOCH = {
    date(2022, 12, 1): 28768,
    date(2023, 12, 1): 33562,
    date(2024, 9, 26): 33561,
}

This'll be good for backward compatibility.

How to get the INDY for any date

from datetime import date
import bisect

class NumberFromDate:
    def __init__(self):
        self.data = []

    def add_data(self, data_dict):
        # Insert all items from dictionary
        for key, value in data_dict.items():
            bisect.insort(self.data, (key, value))

    def get_number(self, date_obj):
        # Find the position where the date would be inserted
        i = bisect.bisect(self.data, (date_obj,))
        # If the date is before the first "beginning from" date, return None
        if i == 0:
            return None
        # Else return the number from the latest "beginning from" date before the input date
        return self.data[i-1][1]

nfd = NumberFromDate()
nfd.add_data({date(2023, 5, 20): 5, date(2023, 5, 22): 10})
print(nfd.get_number(date(2023, 5, 21)))  # prints 5
print(nfd.get_number(date(2023, 5, 22)))  # prints 10
print(nfd.get_number(date(2023, 5, 23)))  # prints 10