public void New_terminal_block_when_ttd_reached()
{
TestSpecProvider specProvider = new(London.Instance);
specProvider.TerminalTotalDifficulty = 5000000;
Block genesisBlock = Build.A.Block.WithNumber(0).TestObject;
BlockTree blockTree = Build.A.BlockTree(genesisBlock, specProvider).OfChainLength(4).TestObject;
PoSSwitcher poSSwitcher = CreatePosSwitcher(blockTree, new MemDb(), specProvider);
Assert.AreEqual(false, poSSwitcher.HasEverReachedTerminalBlock());
Block block = Build.A.Block.WithTotalDifficulty(5000000L).WithNumber(4).WithParent(blockTree.Head !).WithDifficulty(1000000L).TestObject;
Block alternativeTerminalBlock = Build.A.Block.WithTotalDifficulty(5000000L).WithNumber(4).WithParent(blockTree.Head !).WithGasLimit(20000000).WithDifficulty(1000000L).TestObject;
blockTree.SuggestBlock(block);
blockTree.UpdateMainChain(block);
Assert.AreEqual(true, poSSwitcher.HasEverReachedTerminalBlock());
Assert.AreEqual((true, false), poSSwitcher.GetBlockConsensusInfo(alternativeTerminalBlock.Header));
}
public void GetBlockSwitchInfo_returning_expected_results(long terminalTotalDifficulty)
{
TestSpecProvider specProvider = new(London.Instance);
specProvider.TerminalTotalDifficulty = (UInt256)terminalTotalDifficulty;
Block genesisBlock = Build.A.Block.WithNumber(0).TestObject;
BlockTree blockTree = Build.A.BlockTree(genesisBlock, specProvider).OfChainLength(6).TestObject;
PoSSwitcher poSSwitcher = CreatePosSwitcher(blockTree, new MemDb(), specProvider);
BlockHeader?block3 = blockTree.FindHeader(3, BlockTreeLookupOptions.All);
BlockHeader?block4 = blockTree.FindHeader(4, BlockTreeLookupOptions.All);
BlockHeader?block5 = blockTree.FindHeader(5, BlockTreeLookupOptions.All);
Block blockWithPostMergeFlag = Build.A.Block.WithNumber(4).WithDifficulty(0).WithPostMergeFlag(true)
.WithParent(block3 !).TestObject;
Assert.AreEqual((false, false), poSSwitcher.GetBlockConsensusInfo(block3 !)); // PoWBlock
Assert.AreEqual((true, false), poSSwitcher.GetBlockConsensusInfo(block4 !)); // terminal block
Assert.AreEqual((false, true), poSSwitcher.GetBlockConsensusInfo(block5 !)); // incorrect PoW, TTD > TD and it is not terminal, so we should process it in the same way like post merge blocks
Assert.AreEqual((false, true), poSSwitcher.GetBlockConsensusInfo(blockWithPostMergeFlag.Header)); // block with post merge flag
}
public void GetBlockSwitchInfo_returning_expected_results_when_td_null_or_zero(long terminalTotalDifficulty, bool nullTdValue)
{
TestSpecProvider specProvider = new(London.Instance);
specProvider.TerminalTotalDifficulty = (UInt256)terminalTotalDifficulty;
Block genesisBlock = Build.A.Block.WithNumber(0).TestObject;
BlockTree blockTree = Build.A.BlockTree(genesisBlock, specProvider).OfChainLength(6).TestObject;
PoSSwitcher poSSwitcher = CreatePosSwitcher(blockTree, new MemDb(), specProvider);
BlockHeader?block3 = blockTree.FindHeader(3, BlockTreeLookupOptions.All);
BlockHeader?block4 = blockTree.FindHeader(4, BlockTreeLookupOptions.All);
BlockHeader?block5 = blockTree.FindHeader(5, BlockTreeLookupOptions.All);
Block blockWithPostMergeFlag = Build.A.Block.WithNumber(4).WithDifficulty(0).WithPostMergeFlag(true)
.WithParent(block3 !).TestObject;
block3 !.TotalDifficulty = nullTdValue ? null : UInt256.Zero;
block4 !.TotalDifficulty = nullTdValue ? null : UInt256.Zero;
block5 !.TotalDifficulty = nullTdValue ? null : UInt256.Zero;
Assert.AreEqual((false, false), poSSwitcher.GetBlockConsensusInfo(block3 !)); // PoWBlock
Assert.AreEqual((false, false), poSSwitcher.GetBlockConsensusInfo(block4 !)); // terminal block
Assert.AreEqual((false, false), poSSwitcher.GetBlockConsensusInfo(block5 !));
Assert.AreEqual((false, true), poSSwitcher.GetBlockConsensusInfo(blockWithPostMergeFlag.Header)); // block with post merge flag
}