def fetch_exchange_rate(user: User):
from_token = default_token(user)
default_limit, limit_amount = TokenProcessor.get_default_limit(
user, from_token)
exchange_rate_full_precision = TokenProcessor.get_exchange_rate(
user, from_token)
exchange_limit = rounded_dollars(limit_amount)
exchange_rate = round_to_sig_figs(exchange_rate_full_precision, 3)
exchange_sample_value = round(exchange_rate_full_precision *
float(1000))
if exchange_limit:
TokenProcessor.send_sms(
user,
"exchange_rate_can_exchange_sms",
token_name=from_token.symbol,
exchange_rate=exchange_rate,
exchange_limit=exchange_limit,
exchange_sample_value=exchange_sample_value,
limit_period=default_limit.time_period_days)
else:
TokenProcessor.send_sms(
user,
"exchange_rate_sms",
token_name=from_token.symbol,
exchange_rate=exchange_rate,
exchange_sample_value=exchange_sample_value,
)
def standard_string(t):
if t['limit'].total_amount:
allowed_amount = f"{rounded_dollars(str(t['limit'].total_amount))}"
rounded_rate = round_to_sig_figs(t['exchange_rate'], 3)
return (
f"{allowed_amount} {t['name']} (1 {t['name']} = {rounded_rate} {reserve_token.symbol})"
)
else:
return ""
def ge_string(t):
if t['limit'].transfer_balance_fraction:
# TODO: This doesn't seem DRY with respect to 'get default exchange rate'
allowed_amount = rounded_dollars(
t['limit'].transfer_balance_fraction * t['balance'])
rounded_rate = round_to_sig_figs(t['exchange_rate'], 3)
return (
f"{allowed_amount} {t['name']} (1 {t['name']} = {rounded_rate} {reserve_token.symbol})"
)
else:
return ""
def token_string(limit_type: Type[AggregateLimit], t: dict):
if isinstance(t['limit'], limit_type):
with ephemeral_alchemy_object(
CreditTransfer,
transfer_type=TransferTypeEnum.PAYMENT,
transfer_subtype=TransferSubTypeEnum.AGENT_OUT,
sender_user=user,
recipient_user=user,
token=t['token'],
amount=0) as dummy_transfer:
allowed_amount = f"{rounded_dollars(str(t['limit'].available_base(dummy_transfer)))}"
rounded_rate = round_to_sig_figs(t['exchange_rate'], 3)
return (
f"{allowed_amount} {t['name']} (1 {t['name']} = {rounded_rate} {reserve_token.symbol})"
)
else:
return ""
