public Storage(string path, Executor executor)
{
storagePath = path;
this.executor = executor;
}
void MineFromLastBlock(CancellationToken token)
{
// Takeout memory pool transactions.
var size = 350; // Estimated block header + coinbase size
var txs = InventoryManager.MemoryPool
.Select(tx => tx.Value)
.TakeWhile(tx => (size += tx.Original.Length + 50)
< InventoryManager.MaximumBlockSize)
.ToList(); // Iteration should end immediately.
// Choose transactions that are valid.
var blockTime = DateTime.UtcNow;
ulong coinbase = BlockParameter.GetCoinbase(Executor.Latest.Height + 1);
var spent = new List <TransactionOutput>();
txs = txs.Where(tx =>
{
try
{
token.ThrowIfCancellationRequested();
Executor.Run(tx, blockTime, spentTxo: spent);
var exec = tx.ExecInfo;
coinbase += exec.TransactionFee;
spent.AddRange(exec.RedeemedOutputs);
return(true);
}
catch { return(false); }
}).ToList();
// Create coinbase transaction structure.
var coinbaseTx = new Transaction
{
Timestamp = blockTime,
InEntries = new List <InEntry>(),
OutEntries = new List <OutEntry>
{
new OutEntry
{
RecipientHash = RecipientAddress,
Amount = coinbase,
},
},
};
// We need backing byte-encoded behind.
coinbaseTx = DeserializeTransaction(Serialize(coinbaseTx));
Executor.Run(coinbaseTx, blockTime, coinbase);
txs.Insert(0, coinbaseTx);
// Calculate root hash.
var txIds = txs.Select(x => x.Id).ToList();
var block = new Block
{
PreviousHash = Executor.Latest.Id,
Difficulty = BlockParameter.GetNextDifficulty(
Executor.Latest.Ancestors(Executor.Blocks)),
TransactionRootHash = RootHashTransactionIds(txIds),
};
if (!Mine(block, token))
{
return;
}
block.TransactionIds = txIds;
block.Transactions = txs.Select(x => x.Original).ToList();
block.ParsedTransactions = txs.ToArray();
logger.LogInformation("Block mined: {0}",
JsonConvert.SerializeObject(block, Formatting.Indented));
var msg = new InventoryMessage
{
Data = Serialize(block),
ObjectId = block.Id,
IsBlock = true,
Type = InventoryMessageType.Body,
};
ConnectionManager.BroadcastAsync(msg);
InventoryManager.HandleMessage(msg, -1);
}