TeleSplitWiseGram

This is a Bill Splitting Telegram Bot, written using PyTelegramBot API.

Setup

Copy and paste the following below into your console:

!pip3 install pyTelegramBotAPI

Insert Telegram Bot token in fakeDb.json Add the bot to your group

How it works

Use commands /start to bring up the instructions

/newtrip - starts a new trip

/sum - used to declare owing someone money

/split - used to charge a group of people money equally

/receipt - brings up the receipt

/endtrip - wipes your data from the database

How the code works

This uses PyTelegramBot API for most of its functions albeit some custom algorithms.

The storage for the bot lies in indexing n^2 integers - implicitly assining a serial number to each user, allowing the bot to keep track of money flows. Iterations are done using modulo n as well.

Receipt simplification lies in identifying these modulo conjugates, ie. (1n) + 3 and (3n) + 1 are modulo conjugates, these serve to be the pair of indexes where money owed is compared and the delta is computed.

def listsimplify(lst, num):
    for i in range(num):
        for j in range(num):
            if lst[i*num+j] > lst[j*num+i]:
                lst[i*num+j] = lst[i*num+j] - lst[j*num+i]
                lst[j*num+i] = 0
            elif lst[j*num+i] > lst[i*num+j]:
                lst[j*num+i] = lst[j*num+i] - lst[i*num+j]
                lst[i*num+j] = 0
            else:
                pass
    return lst

Limitations and Possible future improvements

Only 1 change can be made at a time due to temprary adjustments being made to 1 local Python Class (transaction) at a time.

class transaction:
    def __init__(self,value):
        self.currency = "MYR"
        self.pax = None
        self.value = None
        self.personlist = None
        self.gstservice = None

Hopefully my coding gets better and I can allow multiple changes at a time.