public void TestDBreezeSerialization()
{
using (NodeContext ctx = NodeContext.Create(this))
{
Block genesis = ctx.Network.GetGenesis();
var genesisChainedHeader = new ChainedHeader(genesis.Header, ctx.Network.GenesisHash, 0);
ChainedHeader chained = this.MakeNext(genesisChainedHeader, ctx.Network);
ctx.Coindb.SaveChanges(new UnspentOutput[] { new UnspentOutput(new OutPoint(genesis.Transactions[0], 0), new Coins(0, genesis.Transactions[0].Outputs.First(), true)) }, new HashHeightPair(genesisChainedHeader), new HashHeightPair(chained));
Assert.NotNull(ctx.Coindb.FetchCoins(new[] { new OutPoint(genesis.Transactions[0], 0) }).UnspentOutputs.Values.FirstOrDefault().Coins);
Assert.Null(ctx.Coindb.FetchCoins(new[] { new OutPoint() }).UnspentOutputs.Values.FirstOrDefault().Coins);
ChainedHeader previous = chained;
chained = this.MakeNext(this.MakeNext(genesisChainedHeader, ctx.Network), ctx.Network);
chained = this.MakeNext(this.MakeNext(genesisChainedHeader, ctx.Network), ctx.Network);
ctx.Coindb.SaveChanges(new List <UnspentOutput>(), new HashHeightPair(previous), new HashHeightPair(chained));
Assert.Equal(chained.HashBlock, ctx.Coindb.GetTipHash().Hash);
ctx.ReloadPersistentCoinView();
Assert.Equal(chained.HashBlock, ctx.Coindb.GetTipHash().Hash);
Assert.NotNull(ctx.Coindb.FetchCoins(new[] { new OutPoint(genesis.Transactions[0], 0) }).UnspentOutputs.Values.FirstOrDefault().Coins);
Assert.Null(ctx.Coindb.FetchCoins(new[] { new OutPoint() }).UnspentOutputs.Values.FirstOrDefault().Coins);
}
}
public void CanRewind()
{
using (NodeContext nodeContext = NodeContext.Create(this))
{
var dateTimeProvider = new DateTimeProvider();
var cacheCoinView = new CachedCoinView(this.network, new Checkpoints(), nodeContext.Coindb, dateTimeProvider, this.loggerFactory, new NodeStats(dateTimeProvider, this.loggerFactory), new ConsensusSettings(new NodeSettings(this.network)));
var tester = new CoinViewTester(cacheCoinView);
List <(Coins, OutPoint)> coinsA = tester.CreateCoins(5);
List <(Coins, OutPoint)> coinsB = tester.CreateCoins(1);
tester.NewBlock();
cacheCoinView.Flush();
Assert.True(tester.Exists(coinsA[2]));
Assert.True(tester.Exists(coinsB[0]));
// Spend some coins.
tester.Spend(coinsA[2]);
tester.Spend(coinsB[0]);
tester.NewBlock();
// This will save an empty RewindData instance
tester.NewBlock();
// Create a new coin set/
List <(Coins, OutPoint)> coinsC = tester.CreateCoins(1);
tester.NewBlock();
Assert.True(tester.Exists(coinsA[0]));
Assert.True(tester.Exists(coinsC[0]));
Assert.False(tester.Exists(coinsA[2]));
Assert.False(tester.Exists(coinsB[0]));
// We need to rewind 3 times as we are now rewinding one block at a time.
tester.Rewind(); // coinsC[0] should not exist any more.
tester.Rewind(); // coinsA[2] should be spendable again.
tester.Rewind(); // coinsB[2] should be spendable again.
Assert.False(tester.Exists(coinsC[0]));
Assert.True(tester.Exists(coinsA[2]));
Assert.True(tester.Exists(coinsB[0]));
// Spend some coins and esnure they are not spendable.
tester.Spend(coinsA[2]);
tester.Spend(coinsB[0]);
tester.NewBlock();
cacheCoinView.Flush();
Assert.False(tester.Exists(coinsA[2]));
Assert.False(tester.Exists(coinsB[0]));
// Rewind so that coinsA[2] and coinsB[0] become spendable again.
tester.Rewind();
Assert.True(tester.Exists(coinsA[2]));
Assert.True(tester.Exists(coinsB[0]));
// Create 7 coins in a new coin set and spend the first coin.
List <(Coins, OutPoint)> coinsD = tester.CreateCoins(7);
tester.Spend(coinsD[0]);
// Create a coin in a new coin set and spend it.
List <(Coins, OutPoint)> coinsE = tester.CreateCoins(1);
tester.Spend(coinsE[0]);
tester.NewBlock();
Assert.True(tester.Exists(coinsD[1]));
Assert.False(tester.Exists(coinsD[0]));
cacheCoinView.Flush();
// Creates another empty RewindData instance.
tester.NewBlock();
// Rewind one block.
tester.Rewind();
// coinsD[1] was never touched, so should remain unchanged.
// coinsD[0] was spent but the block in which the changes happened was not yet rewound to, so it remains unchanged.
// coinsE[0] was spent but the block in which the changes happened was not yet rewound to, so it remains unchanged.
// coinsA[1] was not touched, so should remain unchanged.
// coinsB[1] was not touched, so should remain unchanged.
Assert.True(tester.Exists(coinsD[1]));
Assert.False(tester.Exists(coinsD[0]));
Assert.False(tester.Exists(coinsE[0]));
Assert.True(tester.Exists(coinsA[2]));
Assert.True(tester.Exists(coinsB[0]));
// Rewind one block.
tester.Rewind();
// coinsD[0] should now not exist in CoinView anymore.
// coinsE[0] should now not exist in CoinView anymore.
Assert.False(tester.Exists(coinsD[0]));
Assert.False(tester.Exists(coinsE[0]));
}
}