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cic-internal-integration
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Makes decimal explicitly declared for transactional operations.

This commit is contained in:
PhilipWafula 2021-11-22 13:10:24 +03:00
parent be31de0a8a
commit 02f27cd5e8
Signed by untrusted user: mango-habanero
GPG Key ID: B00CE9034DA19FB7
1 changed files with 16 additions and 18 deletions
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34
apps/cic-ussd/cic_ussd/account/transaction.py
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@ -1,7 +1,6 @@
# standard import
import decimal
import json
import logging
from math import trunc
from typing import Dict, Tuple
# external import
@ -9,8 +8,6 @@ from cic_eth.api import Api
from sqlalchemy.orm.session import Session
# local import
from cic_ussd.account.chain import Chain
from cic_ussd.account.tokens import get_cached_default_token
from cic_ussd.db.models.account import Account
from cic_ussd.db.models.base import SessionBase
from cic_ussd.error import UnknownUssdRecipient
@ -55,32 +52,32 @@ def aux_transaction_data(preferred_language: str, transaction: dict) -> dict:
return transaction
def from_wei(value: int) -> float:
def from_wei(decimals: int, value: int) -> float:
"""This function converts values in Wei to a token in the cic network.
:param decimals: The decimals required for wei values.
:type decimals: int
:param value: Value in Wei
:type value: int
:return: SRF equivalent of value in Wei
:rtype: float
"""
cached_token_data = json.loads(get_cached_default_token(Chain.spec.__str__()))
token_decimals: int = cached_token_data.get('decimals')
value = float(value) / (10**token_decimals)
value = float(value) / (10**decimals)
return truncate(value=value, decimals=2)
def to_wei(value: int) -> int:
def to_wei(decimals: int, value: int) -> int:
"""This functions converts values from a token in the cic network to Wei.
:param decimals: The decimals required for wei values.
:type decimals: int
:param value: Value in SRF
:type value: int
:return: Wei equivalent of value in SRF
:rtype: int
"""
cached_token_data = json.loads(get_cached_default_token(Chain.spec.__str__()))
token_decimals: int = cached_token_data.get('decimals')
return int(value * (10**token_decimals))
return int(value * (10**decimals))
def truncate(value: float, decimals: int):
def truncate(value: float, decimals: int) -> float:
"""This function truncates a value to a specified number of decimals places.
:param value: The value to be truncated.
:type value: float
@ -89,9 +86,8 @@ def truncate(value: float, decimals: int):
:return: The truncated value.
:rtype: int
"""
decimal.getcontext().rounding = decimal.ROUND_DOWN
contextualized_value = decimal.Decimal(value)
return round(contextualized_value, decimals)
stepper = 10.0**decimals
return trunc(stepper*value) / stepper
def transaction_actors(transaction: dict) -> Tuple[Dict, Dict]:
@ -166,14 +162,16 @@ class OutgoingTransaction:
self.from_address = from_address
self.to_address = to_address
def transfer(self, amount: int, token_symbol: str):
def transfer(self, amount: int, decimals: int, token_symbol: str):
"""This function initiates standard transfers between one account to another
:param amount: The amount of tokens to be sent
:type amount: int
:param decimals: The decimals for the token being transferred.
:type decimals: int
:param token_symbol: ERC20 token symbol of token to send
:type token_symbol: str
"""
self.cic_eth_api.transfer(from_address=self.from_address,
to_address=self.to_address,
value=to_wei(value=amount),
value=to_wei(decimals=decimals, value=amount),
token_symbol=token_symbol)