125 lines
4.2 KiB
Python
125 lines
4.2 KiB
Python
"""# Crypto Tax.
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Tool to automatically perform tax computations of crypto transactions from the danish perspective.
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## TODO
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This tool is a work in progress:
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- [ ] Support Partisia Blockchain
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- [ ] Fix Kucoin issues.
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- [ ] Produce Excel output file:
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* Sheet 1: Gives a basic overview, including computed tax values from the rest of
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the sheet, and reasonings for these. Gives an overview of the other sheets.
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* Sheet 2: Current assets, including FIFO acquisition prices.
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* Sheet 3: Historic sales, with FIFO.
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"""
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import sys
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import requests
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import fin_depo
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from . import secrets
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from fin_defs import CryptoCurrency, AssetAmount, MPC, Asset, USDT
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from decimal import Decimal
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from collections import deque
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from fin_depo.data import *
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import datetime
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import dataclasses
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import logging
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logger = logging.getLogger(__name__)
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@dataclasses.dataclass
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class BoughtAndSold:
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amount: AssetAmount
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time_bought: datetime.datetime
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time_sold: datetime.datetime
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@dataclasses.dataclass
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class BoughtAndNotYetSold:
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amount: AssetAmount
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time_bought: datetime.datetime
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@dataclasses.dataclass
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class TaxReport:
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bought_and_sold_for: list[BoughtAndSold]
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bought_and_spent_for: list[BoughtAndSold]
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current_assets: dict[Asset, deque[BoughtAndNotYetSold]]
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def compute_tax(transfers: list) -> TaxReport:
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transfers.sort(key=lambda t:t.executed_time)
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bought_and_sold_for: list[BoughtAndSold] = []
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bought_and_spent_for: list[BoughtAndSold] = []
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prices_bought_for: dict[Asset, deque[BoughtAndNotYetSold]] = {}
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if False:
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prices_bought_for[MPC] = deque()
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prices_bought_for[MPC].append(BoughtAndNotYetSold(AssetAmount(MPC, Decimal(100)), datetime.datetime(2000, 1,1,1,1,1,1)))
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prices_bought_for[USDT] = deque()
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prices_bought_for[USDT].append(BoughtAndNotYetSold(AssetAmount(USDT, Decimal(100)), datetime.datetime(2000, 1,1,1,1,1,1)))
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def sell(amount: AssetAmount, executed_time: datetime.datetime, spent=False):
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logger.info(f'Selling: {amount}')
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while amount.amount > 0:
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if len(prices_bought_for[amount.asset]) == 0:
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raise Exception('Miscalculation: ' + str(amount))
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partial = prices_bought_for[amount.asset].popleft()
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logger.info(f'Fuck : {amount} - {partial.amount}')
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amount_covered_by_partial = min(partial.amount, amount)
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amount -= amount_covered_by_partial
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new_partial_amount = partial.amount - amount_covered_by_partial
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logger.info(f' => {amount} ({new_partial_amount}')
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# Re-add partial
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if new_partial_amount.amount != 0:
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new_partial = BoughtAndNotYetSold(new_partial_amount, partial.time_bought)
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logger.info(f' => new partial: {new_partial}')
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prices_bought_for[amount.asset].appendleft(new_partial)
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del new_partial
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# Add FIFO like
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if spent:
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bought_and_spent_for.append(BoughtAndSold(amount_covered_by_partial, partial.time_bought, executed_time))
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else:
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bought_and_sold_for.append(BoughtAndSold(amount_covered_by_partial, partial.time_bought, executed_time))
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del partial, amount_covered_by_partial
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def spend(amount: AssetAmount, executed_time: datetime.datetime):
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logger.info(f'Spending: {amount}')
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sell(amount, executed_time, spent=True)
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for transfer in transfers:
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logger.info(transfer)
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# Buy
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if output := transfer.output:
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logger.info('Buy')
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if output.asset not in prices_bought_for:
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prices_bought_for[output.asset] = deque()
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prices_bought_for[output.asset].append(BoughtAndNotYetSold(output, transfer.executed_time))
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del output
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# Sell
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if _input := transfer.input:
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logger.info('Sell')
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sell(_input, transfer.executed_time)
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del _input
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if fee := transfer.fee:
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logger.info('Sell')
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spend(fee, transfer.executed_time)
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del transfer, fee
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return TaxReport(
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bought_and_sold_for=bought_and_sold_for,
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bought_and_spent_for=bought_and_spent_for,
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current_assets=prices_bought_for,
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)
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