public Blockchain ReadBlockchain(BlockchainKey chainedBlock)
{
throw new NotImplementedException();
}
public Data.Blockchain ReadBlockchain(BlockchainKey blockchainKey)
{
CheckDatabaseFolder();
var blockListBuilder = ImmutableList.CreateBuilder<ChainedBlock>();
var utxoBuilder = ImmutableDictionary.CreateBuilder<UInt256, UnspentTx>();
var connString = @"Server=localhost; Database=BitSharp_Blockchains; Trusted_Connection=true;";
using (var conn = new SqlConnection(connString))
{
conn.Open();
using (var cmd = conn.CreateCommand())
{
cmd.CommandText = @"
SELECT BlockHash, PreviousBlockHash, Height, TotalWork
FROM ChainedBlocks
WHERE Guid = @guid AND RootBlockHash = @rootBlockHash
ORDER BY Height ASC";
cmd.Parameters.SetValue("@guid", SqlDbType.Binary, 16).Value = blockchainKey.Guid.ToByteArray();
cmd.Parameters.SetValue("@rootBlockHash", SqlDbType.Binary, 32).Value = blockchainKey.RootBlockHash.ToDbByteArray();
using (var reader = cmd.ExecuteReader())
{
while (reader.Read())
{
var blockHash = reader.GetUInt256(0);
var previousBlockHash = reader.GetUInt256(1);
var height = reader.GetInt32(2);
var totalWork = reader.GetBigInteger(3);
blockListBuilder.Add(new ChainedBlock(blockHash, previousBlockHash, height, totalWork));
}
}
}
using (var cmd = conn.CreateCommand())
{
cmd.CommandText = @"
SELECT UtxoChunkBytes
FROM UtxoData
WHERE Guid = @guid AND RootBlockHash = @rootBlockHash";
cmd.Parameters.SetValue("@guid", SqlDbType.Binary, 16).Value = blockchainKey.Guid.ToByteArray();
cmd.Parameters.SetValue("@rootBlockHash", SqlDbType.Binary, 32).Value = blockchainKey.RootBlockHash.ToDbByteArray();
using (var reader = cmd.ExecuteReader())
{
while (reader.Read())
{
var chunkBytes = reader.GetBytes(0);
var chunkStream = new MemoryStream(chunkBytes);
using (var chunkReader = new BinaryReader(chunkStream))
{
var chunkLength = chunkReader.Read4Bytes().ToIntChecked();
var outputs = new TxOutputKey[chunkLength];
for (var i = 0; i < chunkLength; i++)
{
var prevTxHash = chunkReader.Read32Bytes();
var prevTxOutputIndex = chunkReader.Read4Bytes();
outputs[i] = new TxOutputKey(prevTxHash, prevTxOutputIndex);
}
//TODO utxoBuilder.UnionWith(outputs);
}
}
}
}
}
return new Data.Blockchain(blockListBuilder.ToImmutable(), blockListBuilder.Select(x => x.BlockHash).ToImmutableHashSet(), utxoBuilder.ToImmutable());
}
public BlockchainKey WriteBlockchain(Data.Blockchain blockchain)
{
var guid = Guid.NewGuid();
var blockchainKey = new BlockchainKey(guid, blockchain.RootBlockHash);
var connString = @"Server=localhost; Database=BitSharp_Blockchains; Trusted_Connection=true;";
using (var conn = new SqlConnection(connString))
{
conn.Open();
using (var trans = conn.BeginTransaction())
{
// write out the metadata for the blockchain
using (var cmd = conn.CreateCommand())
{
cmd.Transaction = trans;
cmd.CommandText = @"
INSERT INTO BlockchainMetadata (Guid, RootBlockHash, TotalWork, IsComplete)
VALUES (@guid, @rootBlockHash, @totalWork, 0);";
cmd.Parameters.SetValue("@guid", SqlDbType.Binary, 16).Value = blockchainKey.Guid.ToByteArray();
cmd.Parameters.SetValue("@rootBlockHash", SqlDbType.Binary, 32).Value = blockchainKey.RootBlockHash.ToDbByteArray();
cmd.Parameters.SetValue("@totalWork", SqlDbType.Binary, 64).Value = blockchain.TotalWork.ToDbByteArray();
cmd.ExecuteNonQuery();
}
// write out the block metadata comprising the blockchain
using (var cmd = conn.CreateCommand())
{
cmd.Transaction = trans;
cmd.CommandText = @"
INSERT INTO ChainedBlocks (Guid, RootBlockHash, BlockHash, PreviousBlockHash, Height, TotalWork)
VALUES (@guid, @rootBlockHash, @blockHash, @previousBlockHash, @height, @totalWork)";
cmd.Parameters.SetValue("@guid", SqlDbType.Binary, 16).Value = blockchainKey.Guid.ToByteArray();
cmd.Parameters.SetValue("@rootBlockHash", SqlDbType.Binary, 32).Value = blockchainKey.RootBlockHash.ToDbByteArray();
cmd.Parameters.Add(new SqlParameter { ParameterName = "@blockHash", SqlDbType = SqlDbType.Binary, Size = 32 });
cmd.Parameters.Add(new SqlParameter { ParameterName = "@previousBlockHash", SqlDbType = SqlDbType.Binary, Size = 32 });
cmd.Parameters.Add(new SqlParameter { ParameterName = "@height", SqlDbType = SqlDbType.Int });
cmd.Parameters.Add(new SqlParameter { ParameterName = "@totalWork", SqlDbType = SqlDbType.Binary, Size = 64 });
foreach (var chainedBlock in blockchain.BlockList)
{
cmd.Parameters["@blockHash"].Value = chainedBlock.BlockHash.ToDbByteArray();
cmd.Parameters["@previousBlockHash"].Value = chainedBlock.PreviousBlockHash.ToDbByteArray();
cmd.Parameters["@height"].Value = chainedBlock.Height;
cmd.Parameters["@totalWork"].Value = chainedBlock.TotalWork.ToDbByteArray();
cmd.ExecuteNonQuery();
}
}
// write out the utxo
using (var cmd = conn.CreateCommand())
{
cmd.Transaction = trans;
cmd.CommandText = @"
INSERT INTO UtxoData (Guid, RootBlockhash, UtxoChunkBytes)
VALUES (@guid, @rootBlockHash, @utxoChunkBytes)";
cmd.Parameters.SetValue("@guid", SqlDbType.Binary, 16).Value = blockchainKey.Guid.ToByteArray();
cmd.Parameters.SetValue("@rootBlockHash", SqlDbType.Binary, 32).Value = blockchainKey.RootBlockHash.ToDbByteArray();
cmd.Parameters.Add(new SqlParameter { ParameterName = "@utxoChunkBytes", SqlDbType = SqlDbType.VarBinary });
var chunkSize = 100000;
var currentOffset = 0;
var chunkBytes = new byte[4 + (36 * chunkSize)];
using (var utxoEnumerator = blockchain.Utxo.GetEnumerator())
{
// chunk outer loop
while (currentOffset < blockchain.Utxo.Count)
{
var chunkLength = Math.Min(chunkSize, blockchain.Utxo.Count - currentOffset);
var chunkStream = new MemoryStream(chunkBytes);
using (var chunkWriter = new BinaryWriter(chunkStream))
{
chunkWriter.Write4Bytes((UInt32)chunkLength);
// chunk inner loop
for (var i = 0; i < chunkLength; i++)
{
// get the next output from the utxo
if (!utxoEnumerator.MoveNext())
throw new Exception();
var output = utxoEnumerator.Current;
//TODO chunkWriter.Write32Bytes(output.TxHash);
//TODO chunkWriter.Write4Bytes((UInt32)output.TxOutputIndex);
}
cmd.Parameters["@utxoChunkBytes"].Size = chunkBytes.Length;
cmd.Parameters["@utxoChunkBytes"].Value = chunkBytes;
}
// write the chunk
cmd.ExecuteNonQuery();
currentOffset += chunkLength;
}
// there should be no items left in utxo at this point
if (utxoEnumerator.MoveNext())
throw new Exception();
}
}
// mark write as complete
using (var cmd = conn.CreateCommand())
{
cmd.Transaction = trans;
cmd.CommandText = @"
UPDATE BlockchainMetadata SET IsComplete = 1
WHERE Guid = @guid AND RootBlockHash = @rootBlockHash;";
cmd.Parameters.SetValue("@guid", SqlDbType.Binary, 16).Value = blockchainKey.Guid.ToByteArray();
cmd.Parameters.SetValue("@rootBlockHash", SqlDbType.Binary, 32).Value = blockchainKey.RootBlockHash.ToDbByteArray();
cmd.ExecuteNonQuery();
}
trans.Commit();
}
}
return blockchainKey;
}
public Data.Blockchain ReadBlockchain(BlockchainKey blockchainKey)
{
CheckDatabaseFolder();
var blockListBuilder = ImmutableList.CreateBuilder<ChainedBlock>();
var utxoBuilder = ImmutableHashSet.CreateBuilder<TxOutputKey>();
var dbPath = GetDatabasePath(blockchainKey.Guid);
var connString = @"ServerType=1; DataSource=localhost; Database={0}; Pooling=false; User=SYSDBA; Password=NA;".Format2(dbPath);
using (var conn = new FbConnection(connString))
{
conn.Open();
using (var cmd = conn.CreateCommand())
{
cmd.CommandText = @"
SELECT BlockHash, PreviousBlockHash, Height, TotalWork
FROM ChainedBlocks
WHERE Guid = @guid AND RootBlockHash = @rootBlockHash
ORDER BY Height ASC";
cmd.Parameters.SetValue("@guid", FbDbType.Char, FbCharset.Octets, 16).Value = blockchainKey.Guid.ToByteArray();
cmd.Parameters.SetValue("@rootBlockHash", FbDbType.Char, FbCharset.Octets, 32).Value = blockchainKey.RootBlockHash.ToDbByteArray();
using (var reader = cmd.ExecuteReader())
{
while (reader.Read())
{
var blockHash = reader.GetUInt256(0);
var previousBlockHash = reader.GetUInt256(1);
var height = reader.GetInt32(2);
var totalWork = reader.GetBigInteger(3);
blockListBuilder.Add(new ChainedBlock(blockHash, previousBlockHash, height, totalWork));
}
}
}
using (var cmd = conn.CreateCommand())
{
cmd.CommandText = @"
SELECT UtxoChunkBytes
FROM UtxoData
WHERE Guid = @guid AND RootBlockHash = @rootBlockHash";
cmd.Parameters.SetValue("@guid", FbDbType.Char, FbCharset.Octets, 16).Value = blockchainKey.Guid.ToByteArray();
cmd.Parameters.SetValue("@rootBlockHash", FbDbType.Char, FbCharset.Octets, 32).Value = blockchainKey.RootBlockHash.ToDbByteArray();
using (var reader = cmd.ExecuteReader())
{
while (reader.Read())
{
var chunkBytes = reader.GetBytes(0);
var chunkStream = new MemoryStream(chunkBytes);
using (var chunkReader = new BinaryReader(chunkStream))
{
var chunkLength = chunkReader.Read4Bytes().ToIntChecked();
var outputs = new TxOutputKey[chunkLength];
for (var i = 0; i < chunkLength; i++)
{
var prevTxHash = chunkReader.Read32Bytes();
var prevTxOutputIndex = chunkReader.Read4Bytes();
outputs[i] = new TxOutputKey(prevTxHash, prevTxOutputIndex);
}
utxoBuilder.UnionWith(outputs);
}
}
}
}
}
return new Data.Blockchain(blockListBuilder.ToImmutable(), blockListBuilder.Select(x => x.BlockHash).ToImmutableHashSet(), utxoBuilder.ToImmutable());
}