fix format_satoshis for None values
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@ -109,6 +109,8 @@ def user_dir():
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def format_satoshis(x, is_diff=False, num_zeros = 0, decimal_point = 8, whitespaces=False):
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from locale import localeconv
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if x is None:
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return 'unknown'
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x = int(x) # Some callers pass Decimal
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scale_factor = pow (10, decimal_point)
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integer_part = "{:n}".format(int(abs(x) / float(scale_factor)))
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