mmgen/mmgen-wallet
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BTCAmt: add 'from_decimal' option to constructor

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The MMGen Project 2019-05-27 09:29:28 +00:00
commit 815f709c7b
Signed by: mmgen
GPG key ID: 3F8B1861E32B7DA2
1 changed files with 6 additions and 1 deletions
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7
mmgen/obj.py
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@ -390,7 +390,8 @@ class BTCAmt(Decimal,Hilite,InitErrors):
units = ('satoshi',)
forbidden_types = (float,int)
def __new__(cls,num,from_unit=None,on_fail='die'):
# NB: 'from_decimal' rounds down to precision of 'min_coin_unit'
def __new__(cls,num,from_unit=None,from_decimal=False,on_fail='die'):
if type(num) == cls: return num
cls.arg_chk(on_fail)
try:
@ -399,6 +400,10 @@ class BTCAmt(Decimal,Hilite,InitErrors):
"'{}': unrecognized denomination for {}".format(from_unit,cls.__name__))
assert type(num) == int,'value is not an integer or long integer'
me = Decimal.__new__(cls,num * getattr(cls,from_unit))
elif from_decimal:
assert type(num) == Decimal,(
"number is not of type Decimal (type is {!r})".format(type(num).__name__))
me = Decimal.__new__(cls,num).quantize(cls.min_coin_unit)
else:
for t in cls.forbidden_types:
assert type(num) is not t,"number is of forbidden type '{}'".format(t.__name__)