BitSharper.Test.ChainSplitTests.TestDoubleSpendOnForkPending C# (CSharp) Method

        public void TestDoubleSpendOnForkPending()
        {
            // Check what happens when a re-org happens and one of our UNconfirmed transactions becomes invalidated by a
            // double spend on the new best chain.

            Transaction eventDead = null;
            Transaction eventReplacement = null;
            _wallet.DeadTransaction +=
                (sender, e) =>
                {
                    eventDead = e.DeadTx;
                    eventReplacement = e.ReplacementTx;
                };

            // Start with 50 coins.
            var b1 = _unitTestParams.GenesisBlock.CreateNextBlock(_coinbaseTo);
            _chain.Add(b1);

            var t1 = _wallet.CreateSend(_someOtherGuy, Utils.ToNanoCoins(10, 0));
            var yetAnotherGuy = new EcKey().ToAddress(_unitTestParams);
            var t2 = _wallet.CreateSend(yetAnotherGuy, Utils.ToNanoCoins(20, 0));
            _wallet.ConfirmSend(t1);
            // t1 is still pending ...
            var b2 = b1.CreateNextBlock(new EcKey().ToAddress(_unitTestParams));
            _chain.Add(b2);
            Assert.AreEqual(Utils.ToNanoCoins(0, 0), _wallet.GetBalance());
            Assert.AreEqual(Utils.ToNanoCoins(40, 0), _wallet.GetBalance(Wallet.BalanceType.Estimated));

            // Now we make a double spend become active after a re-org.
            // genesis -> b1 -> b2 [t1 pending]
            //              \-> b3 (t2) -> b4
            var b3 = b1.CreateNextBlock(new EcKey().ToAddress(_unitTestParams));
            b3.AddTransaction(t2);
            b3.Solve();
            _chain.Add(b3); // Side chain.
            var b4 = b3.CreateNextBlock(new EcKey().ToAddress(_unitTestParams));
            _chain.Add(b4); // New best chain.

            // Should have seen a double spend against the pending pool.
            Assert.AreEqual(t1, eventDead);
            Assert.AreEqual(t2, eventReplacement);
            Assert.AreEqual(Utils.ToNanoCoins(30, 0), _wallet.GetBalance());

            // ... and back to our own parallel universe.
            var b5 = b2.CreateNextBlock(new EcKey().ToAddress(_unitTestParams));
            _chain.Add(b5);
            var b6 = b5.CreateNextBlock(new EcKey().ToAddress(_unitTestParams));
            _chain.Add(b6);
            // genesis -> b1 -> b2 -> b5 -> b6 [t1 pending]
            //              \-> b3 [t2 inactive] -> b4
            Assert.AreEqual(Utils.ToNanoCoins(0, 0), _wallet.GetBalance());
            Assert.AreEqual(Utils.ToNanoCoins(40, 0), _wallet.GetBalance(Wallet.BalanceType.Estimated));
        }