Initial commit: BSV blockchain parser

.gitignore

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+# Build output
+bin/
+obj/
+
+# User-specific files
+*.user
+*.suo
+*.userosscache
+*.sln.docstates
+.vs/
+
+# NuGet
+*.nupkg
+*.snupkg
+project.lock.json
+project.fragment.lock.json
+artifacts/
+packages/
+
+# .NET
+*.cache
+
+# Bitcoin blockchain data files (binary, large)
+blk*.dat
+rev*.dat
+
+# OS
+.DS_Store
+Thumbs.db
+
+# IDE
+.idea/
+*.swp

BSVTest.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="BsvBitcoinBlockChain" Version="1.3.0" />
+  </ItemGroup>
+
+</Project>

Program.cs

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+using BitcoinBlockchain.Data;
+using BitcoinBlockchain.Parser;
+
+var blockchainFilePath = @"C:\Users\feie9454\source\repos\BSVTest\BSVTest\blk00000.dat";
+
+if (!File.Exists(blockchainFilePath))
+{
+	Console.Error.WriteLine($"找不到区块文件: {blockchainFilePath}");
+	return;
+}
+
+var blockchainDirectory = Path.GetDirectoryName(blockchainFilePath);
+var firstBlockchainFileName = Path.GetFileName(blockchainFilePath);
+
+if (string.IsNullOrWhiteSpace(blockchainDirectory))
+{
+	Console.Error.WriteLine("无法确定区块文件所在目录。");
+	return;
+}
+
+IBlockchainParser blockchainParser = new BlockchainParser(blockchainDirectory, firstBlockchainFileName, 1);
+
+var blockCount = 0;
+var transactionCount = 0;
+var transactionInputCount = 0;
+var transactionOutputCount = 0;
+ulong movedSatoshis = 0;
+var blocks = new List<ParserBlock>();
+
+foreach (ParserBlock block in blockchainParser.ParseBlockchain())
+{
+	blocks.Add(block);
+	blockCount++;
+	transactionCount += block.Transactions.Count;
+
+	foreach (var transaction in block.Transactions)
+	{
+		transactionInputCount += transaction.Inputs.Count;
+		transactionOutputCount += transaction.Outputs.Count;
+
+		foreach (var transactionOutput in transaction.Outputs)
+		{
+			movedSatoshis += (ulong)transactionOutput.Value.Satoshi;
+		}
+	}
+}
+
+var blocksByHash = blocks.ToDictionary(block => block.GetHash().ToString(), StringComparer.OrdinalIgnoreCase);
+var chainLengthCache = new Dictionary<string, int>(StringComparer.OrdinalIgnoreCase);
+
+var longestChainLength = 0;
+ParserBlock? longestChainTip = null;
+
+foreach (var block in blocks)
+{
+	var currentLength = GetChainLength(block);
+	if (currentLength > longestChainLength)
+	{
+		longestChainLength = currentLength;
+		longestChainTip = block;
+	}
+}
+
+string? longestChainStartHash = null;
+string? longestChainEndHash = longestChainTip?.GetHash().ToString();
+
+if (longestChainTip is not null)
+{
+	var current = longestChainTip;
+	while (true)
+	{
+		longestChainStartHash = current.GetHash().ToString();
+		var previousHash = current.Header.HashPrevBlock.ToString();
+		if (!blocksByHash.TryGetValue(previousHash, out var parentBlock))
+		{
+			break;
+		}
+
+		current = parentBlock;
+	}
+}
+
+Console.WriteLine($"区块数: {blockCount}");
+Console.WriteLine($"交易数: {transactionCount}");
+Console.WriteLine($"交易输入数: {transactionInputCount}");
+Console.WriteLine($"交易输出数: {transactionOutputCount}");
+Console.WriteLine($"所有交易输出累计: {movedSatoshis} sat");
+Console.WriteLine($"最长链片段长度: {longestChainLength}");
+
+if (longestChainStartHash is not null && longestChainEndHash is not null)
+{
+	Console.WriteLine($"最长链片段起点块哈希: {longestChainStartHash}");
+	Console.WriteLine($"最长链片段终点块哈希: {longestChainEndHash}");
+}
+
+int GetChainLength(ParserBlock block)
+{
+	var blockHash = block.GetHash().ToString();
+	if (chainLengthCache.TryGetValue(blockHash, out var cachedLength))
+	{
+		return cachedLength;
+	}
+
+	var previousHash = block.Header.HashPrevBlock.ToString();
+	var currentLength = 1;
+
+	if (blocksByHash.TryGetValue(previousHash, out var parentBlock))
+	{
+		currentLength += GetChainLength(parentBlock);
+	}
+
+	chainLengthCache[blockHash] = currentLength;
+	return currentLength;
+}