functional_tests: add spend proof tests

tests/functional_tests/proofs.py

@@ -44,6 +44,7 @@ class ProofsTest():
         txid, tx_key, amount = self.transfer()
         self.check_tx_key(txid, tx_key, amount)
         self.check_tx_proof(txid, amount)
+        self.check_spend_proof(txid)
         self.check_reserve_proof()
 
     def reset(self):
@@ -217,6 +218,40 @@ class ProofsTest():
         except: ok = True
         assert ok or not res.good
 
+    def check_spend_proof(self, txid):
+        daemon = Daemon()
+
+        print('Checking spend proof')
+
+        self.wallet[0].refresh()
+        self.wallet[1].refresh()
+
+        res = self.wallet[0].get_spend_proof(txid, message = 'foo')
+        assert len(res.signature) > 0
+        signature = res.signature
+        res = self.wallet[1].check_spend_proof(txid, message = 'foo', signature = signature)
+        assert res.good
+
+        res = self.wallet[0].get_spend_proof(txid, message = 'foobar')
+        assert len(res.signature) > 0
+        signature2 = res.signature
+        res = self.wallet[1].check_spend_proof(txid, message = 'foobar', signature = signature2)
+        assert res.good
+
+        ok = False
+        try: res = self.wallet[1].check_spend_proof('0' * 64, message = 'foo', signature = signature)
+        except: ok = True
+        assert ok or not res.good
+
+        ok = False
+        try: res = self.wallet[1].check_spend_proof(txid, message = 'bar', signature = signature)
+        except: ok = True
+        assert ok or not res.good
+
+        ok = False
+        try: res = self.wallet[1].check_spend_proof(txid, message = 'foo', signature = signature2)
+        except: ok = True
+        assert ok or not res.good
 
     def check_reserve_proof(self):
         daemon = Daemon()