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       tOnchainInvoice: make get_amount_sat return 0 instead of None. fixes #6203 - electrum - Electrum Bitcoin wallet
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       ---
   DIR commit 730bfda33a0d5c29fc9f7c53b17a0e408a8c0829
   DIR parent 782bfd06e5ff1c6f5eb0ab70ea1ed966cf0d0f63
  HTML Author: ThomasV <thomasv@electrum.org>
       Date:   Fri, 26 Jun 2020 11:14:23 +0200
       
       OnchainInvoice: make get_amount_sat return 0 instead of None. fixes #6203
       
       Diffstat:
         M electrum/invoices.py                |       4 ++--
         M electrum/wallet.py                  |       7 +++----
       
       2 files changed, 5 insertions(+), 6 deletions(-)
       ---
   DIR diff --git a/electrum/invoices.py b/electrum/invoices.py
       t@@ -125,8 +125,8 @@ class OnchainInvoice(Invoice):
                assert len(self.outputs) == 1
                return self.outputs[0].address
        
       -    def get_amount_sat(self) -> Union[int, str, None]:
       -        return self.amount_sat
       +    def get_amount_sat(self) -> Union[int, str]:
       +        return self.amount_sat or 0
        
            @classmethod
            def from_bip70_payreq(cls, pr: 'PaymentRequest') -> 'OnchainInvoice':
   DIR diff --git a/electrum/wallet.py b/electrum/wallet.py
       t@@ -1671,7 +1671,7 @@ class Abstract_Wallet(AddressSynchronizer, ABC):
                    status = self.lnworker.get_payment_status(bfh(r.rhash)) if self.lnworker else PR_UNKNOWN
                else:
                    assert isinstance(r, OnchainInvoice)
       -            paid, conf = self.get_payment_status(r.get_address(), r.amount_sat)
       +            paid, conf = self.get_payment_status(r.get_address(), r.get_amount_sat())
                    status = PR_PAID if paid else PR_UNPAID
                return self.check_expired_status(r, status)
        
       t@@ -1712,10 +1712,9 @@ class Abstract_Wallet(AddressSynchronizer, ABC):
                else:
                    assert isinstance(x, OnchainInvoice)
                    amount_sat = x.get_amount_sat()
       -            assert isinstance(amount_sat, (int, str, type(None)))
       -            d['amount_sat'] = amount_sat
                    addr = x.get_address()
       -            paid, conf = self.get_payment_status(addr, x.amount_sat)
       +            paid, conf = self.get_payment_status(addr, amount_sat)
       +            d['amount_sat'] = amount_sat
                    d['address'] = addr
                    d['URI'] = self.get_request_URI(x)
                    if conf is not None: