public override string ToString()
{
var sb = new StringBuilder();
Txs.ForEach(x => sb.Append(x.ToString()));
sb.Append(" PrevHash:").Append(PrevHash)
.Append(" Dificulty:").Append(Difficulty)
.Append(" Nonce:").Append(Nonce)
.Append(" Hash:").Append(Hash);
return(sb.ToString());
}
/// <summary>
///
/// </summary>
/// <returns></returns>
public byte[] ToStream()
{
if (Validate().Any())
{
return(null);
}
using var ts = new Helper.TangramStream();
ts.Append(Height);
if (Size != 0)
{
ts.Append(Size);
}
ts.Append(BlockHeader.ToStream())
.Append(NrTx)
.Append(Helper.Util.Combine(Txs.Select(x => x.ToHash()).ToArray()))
.Append(BlockPos.ToStream());
return(ts.ToArray());
}
public void Generate()
{
for (ulong i = 0; i < (ulong)ChainHeight; i++)
{
// todo gen blocks and transactions
Block b = BlockSyncHelpers.GenerateValidBlockToSync(i);
Chain.Add(b);
var txList = new List <Transaction>();
Txs.TryAdd(b, txList);
for (ulong j = 0; j < 3; j++)
{
Transaction t = new Transaction();
t.From = Address.FromRawBytes(Hash.FromRawBytes(_from).ToByteArray());
t.To = Address.FromRawBytes(Hash.FromRawBytes(_to).ToByteArray());
t.IncrementId = j;
txList.Add(t);
b.AddTransaction(t);
}
}
}
public bool Verify()
{
string head = string.Empty;
Enumerable.Range(1, Difficulty).ToList().ForEach(a => head += "0");
if (!Hash.StartsWith(head))
{
return(false);
}
using (var sha256 = new SHA256Managed())
{
if (!Hash.Equals(
Convert.ToBase64String(
sha256.ComputeHash(
Encoding.Unicode.GetBytes(Nonce.ToString() + GetMessage())))))
{
return(false);
}
}
var tx = Txs.Skip(1).ToList();
var isVerified = true;
tx.ForEach(a => { if (!a.Verify())
{
isVerified = false;
}
});
if (!isVerified)
{
return(false);
}
// 同一Inputがないか？
var dic = new Dictionary <string, HashSet <string> >();
tx.ForEach(a => a.Inputs.ForEach(b =>
{
if (!dic.ContainsKey(b.PublicKey))
{
dic.Add(b.PublicKey, new HashSet <string>());
}
if (dic[b.PublicKey].Contains(b.TxHash))
{
isVerified = false;
}
else
{
dic[b.PublicKey].Add(b.TxHash);
}
}));
if (!isVerified)
{
return(false);
}
//generation transaction
var txGen = Txs.First();
if (!txGen.Outputs.Sum(d => d.Amount)
.Equals(tx.Sum(a => a.Inputs.Sum(b => b.Amount) - a.Outputs.Sum(c => c.Amount)) + 50m))
{
return(false);
}
return(true);
}
