protected static ByteString NewTokenId(ByteString salt)
{
StorageContext context = Storage.CurrentContext;
byte[] key = new byte[] { Prefix_TokenId };
ByteString id = Storage.Get(context, key);
Storage.Put(context, key, (BigInteger)id + 1);
if (id is not null)
{
salt += id;
}
return(CryptoLib.Sha256(salt));
}
public static void CreateSale(UInt160 seller, BigInteger amount, BigInteger price, string description, ByteString?saleId)
{
if (amount != price * 2)
{
throw new Exception("seller deposit must be 2x price");
}
var token = Runtime.CallingScriptHash;
if (saleId != null)
{
if (saleId.Length != 16)
{
throw new Exception("sale ID must be 16 bytes long");
}
}
else
{
var saleHash = new List <object>();
saleHash.Add(seller);
saleHash.Add(price);
saleHash.Add(description);
saleHash.Add(Runtime.GetRandom());
saleId = CryptoLib.Sha256(StdLib.Serialize(saleHash));
}
StorageMap salesMap = new(Storage.CurrentContext, Prefix_Sales);
var serializedSale = salesMap.Get(saleId);
if (serializedSale != null)
{
throw new Exception("specified saleId already exists");
}
var saleInfo = new SaleInfo();
saleInfo.Seller = seller;
saleInfo.Description = description;
saleInfo.Price = price;
saleInfo.Token = token;
saleInfo.State = SaleState.New;
salesMap.Put(saleId, StdLib.Serialize(saleInfo));
StorageMap accountMap = new(Storage.CurrentContext, Prefix_AccountSales);
accountMap.Put(seller + saleId, 0);
OnNewSale(saleId, seller, description, token, price);
}
protected static ByteString NewTokenId()
{
StorageContext context = Storage.CurrentContext;
byte[] key = new byte[] { Prefix_TokenId };
ByteString id = Storage.Get(context, key);
Storage.Put(context, key, (BigInteger)id + 1);
ByteString data = Runtime.ExecutingScriptHash;
if (id is not null)
{
data += id;
}
return(CryptoLib.Sha256(data));
}
public static bool crossChain(BigInteger toChainID, byte[] toChainAddress, byte[] functionName, byte[] args, byte[] caller)
{
var tx = (Transaction)Runtime.ScriptContainer;
var IdAsByte = toChainID.ToByteArray();
CrossChainTxParameter para = new CrossChainTxParameter
{
toChainID = IdAsByte,
toContract = toChainAddress,
method = functionName,
args = args,
txHash = (byte[])tx.Hash,
crossChainID = (byte[])CryptoLib.Sha256((ByteString)((byte[])Runtime.ExecutingScriptHash).Concat((byte[])tx.Hash)),
fromContract = caller
};
BigInteger requestId = getRequestID(IdAsByte);
var resquestKey = putRequest(IdAsByte, requestId, para);
//event
CrossChainLockEvent(caller, para.fromContract, toChainID, resquestKey, para.args);
return(true);
}
public static ByteString Hash256(ByteString value)
{
return(CryptoLib.Sha256(CryptoLib.Sha256(value)));
}
public static ByteString Hash160(ByteString value)
{
return(CryptoLib.ripemd160(CryptoLib.Sha256(value)));
}
public static byte[] SHA256(byte[] value)
{
return((byte[])CryptoLib.Sha256((ByteString)value));
}
public static byte[] Hash160(byte[] message)
{
return((byte[])CryptoLib.ripemd160(CryptoLib.Sha256((ByteString)message)));
}
/// <summary>
/// Tested, 对叶节点进行Hash计算
/// </summary>
/// <param name="value"></param>
/// <returns></returns>
public static byte[] hashLeaf(byte[] value)
{
byte[] prefix = new byte[] { 0x00 };
return((byte[])CryptoLib.Sha256((ByteString)prefix.Concat(value)));
}
/// <summary>
/// Tested, 对子节点进行Hash计算
/// </summary>
/// <param name="v"></param>
/// <param name="hash"></param>
/// <returns></returns>
public static byte[] hashChildren(byte[] v, byte[] hash)
{
byte[] prefix = new byte[] { 1 };
return((byte[])CryptoLib.Sha256((ByteString)prefix.Concat(v).Concat(hash)));
}