private static object WrapperLock(byte[] keyHash, byte[] from, byte[] to, BigInteger amount, byte[] userEthAddress, BigInteger overtimeBlocks)
{
// params length check
if (keyHash.Length <= 0 || from.Length != 20)
{
return("code:0, msg:The parameters error");
}
// Whether keyHash already exists
StorageMap SWAP_MAP = Storage.CurrentContext.CreateMap(nameof(SWAP_MAP));
var result = SWAP_MAP.Get(keyHash);
if (result.Length != 0)
{
return("code:0, msg:The keyHash already exists.");
}
// check overtime blocks
if (overtimeBlocks < ERC20ToNEP5OvertimeBlocks)
{
overtimeBlocks = ERC20ToNEP5OvertimeBlocks;
}
// transfer qlc from wrapper to contract
object[] transferParams = new object[3];
transferParams[0] = from;
transferParams[1] = to;
transferParams[2] = amount;
if (QlcMain("transfer", transferParams))
{
// swap info
var swapInfo = new SwapInfo()
{
wrapperNeoAddress = from,
userEthAddress = userEthAddress,
amount = amount,
lockTimestamp = Blockchain.GetBlock(Blockchain.GetHeight()).Timestamp,
blockHeight = Blockchain.GetHeight(),
overtimeBlocks = overtimeBlocks,
type = 2,
state = 4
};
var txid = (ExecutionEngine.ScriptContainer as Transaction).Hash;
swapInfo.txidIn = txid;
SWAP_MAP.Put(keyHash, Helper.Serialize(swapInfo));
// event
WrapperLockEvent(keyHash, 3);
return(txid);
}
else
{
return("code:0, msg:transfer error.");
}
}
private static object Unlock(byte[] from, byte[] to, BigInteger amount, byte[] userEthAddress, byte[] ethTxid)
{
// params length check
if (to.Length != 20 || ethTxid.Length == 0)
{
return("code:0, msg:The parameters error");
}
// amount check
if (amount <= MinSwapAmount)
{
return("code:0, msg:The number of transfers cannot be less than 0");
}
// Whether ethTxid already exists
StorageMap SWAP_MAP = Storage.CurrentContext.CreateMap(nameof(SWAP_MAP));
var result = SWAP_MAP.Get(ethTxid);
if (result.Length != 0)
{
return("code:0, msg:The ethTxid already exists.");
}
// transfer qlc from user to contract
object[] transferParams = new object[3];
transferParams[0] = from;
transferParams[1] = to;
transferParams[2] = amount;
if (QlcMain("transfer", transferParams))
{
// swap info
var swapInfo = new SwapInfo()
{
fromAddress = from,
toAddress = to,
amount = amount,
userEthAddress = userEthAddress,
timestamp = Blockchain.GetBlock(Blockchain.GetHeight()).Timestamp,
blockHeight = Blockchain.GetHeight(),
type = 2
};
var txid = (ExecutionEngine.ScriptContainer as Transaction).Hash;
swapInfo.txid = txid;
SWAP_MAP.Put(ethTxid, Helper.Serialize(swapInfo));
// event
UnlockEvent(ethTxid, 2);
return(txid);
}
else
{
return("code:0, msg:transfer error.");
}
}
private static object UserUnlock(string key, byte[] from, byte[] to)
{
// params length check
if (key.Length <= 0 || to.Length != 20)
{
return("code:0, msg:The parameters error.");
}
// get swap info
var keyHash = SmartContract.Sha256(key.AsByteArray());
StorageMap SWAP_MAP = Storage.CurrentContext.CreateMap(nameof(SWAP_MAP));
var result = SWAP_MAP.Get(keyHash);
if (result.Length == 0)
{
return("code:0, msg:The swap info not found.");
}
SwapInfo swapInfo = Helper.Deserialize(result) as SwapInfo;
// timeout check
if (Blockchain.GetHeight() - swapInfo.blockHeight > swapInfo.overtimeBlocks)
{
return("code:0, msg:The swap has timed out.");
}
// state check
if (4 != swapInfo.state)
{
return("code:0, msg:The state doesn't meet the criteria.");
}
// transfer qlc from contract to user
object[] transferParams = new object[3];
transferParams[0] = from;
transferParams[1] = to;
transferParams[2] = swapInfo.amount;
if (QlcMain("transfer", transferParams))
{
var txid = (ExecutionEngine.ScriptContainer as Transaction).Hash;
swapInfo.originText = key;
swapInfo.userNeoAddress = to;
swapInfo.txidOut = txid;
swapInfo.unLockTimestamp = Blockchain.GetBlock(Blockchain.GetHeight()).Timestamp;
swapInfo.state = 5;
SWAP_MAP.Put(keyHash, Helper.Serialize(swapInfo));
// event
UserUnlockEvent(keyHash, 4);
return(txid);
}
else
{
return("code:0, msg:transfer qlc to wrapper fail.");
}
}
private static object RefundWrapper(byte[] keyHash, byte[] from)
{
// params length check
if (keyHash.Length <= 0)
{
return("code:0, msg:The parameters error.");
}
// get swap info
StorageMap SWAP_MAP = Storage.CurrentContext.CreateMap(nameof(SWAP_MAP));
var result = SWAP_MAP.Get(keyHash);
if (result.Length == 0)
{
return("code:0, msg:The swap info not found.");
}
SwapInfo swapInfo = Helper.Deserialize(result) as SwapInfo;
// timeout check
if (Blockchain.GetHeight() - swapInfo.blockHeight <= swapInfo.overtimeBlocks)
{
return("code:0, msg:No timeout.");
}
// state check
if (4 != swapInfo.state)
{
return("code:0, msg:The state doesn't meet the criteria.");
}
// refund qlc from contract to wrapper
object[] transferParams = new object[3];
transferParams[0] = from;
transferParams[1] = swapInfo.wrapperNeoAddress;
transferParams[2] = swapInfo.amount;
if (QlcMain("transfer", transferParams))
{
var txid = (ExecutionEngine.ScriptContainer as Transaction).Hash;
swapInfo.txidRefund = txid;
swapInfo.refundTimestamp = Blockchain.GetBlock(Blockchain.GetHeight()).Timestamp;
swapInfo.state = 6;
SWAP_MAP.Put(keyHash, Helper.Serialize(swapInfo));
// event
RefundWrapperEvent(keyHash, 5);
return(txid);
}
else
{
return("code:0, msg:Refund qlc to wrapper fail.");
}
}
private static object DeleteSwapInfo(byte[] keyHash)
{
// get swap info
StorageMap SWAP_MAP = Storage.CurrentContext.CreateMap(nameof(SWAP_MAP));
var result = SWAP_MAP.Get(keyHash);
if (result.Length == 0)
{
return("code:0, msg:The swap info not found.");
}
SwapInfo swapInfo = Helper.Deserialize(result) as SwapInfo;
// state check
if (swapInfo.state == 1 || swapInfo.state == 4)
{
return("code:0, msg:Not completed swap info.");
}
SWAP_MAP.Delete(keyHash);
return(true);
}
public static object Main(string operation, object[] args)
{
if (Runtime.Trigger == TriggerType.Verification)
{
return(Runtime.CheckWitness(GetOwner()));
}
else if (Runtime.Trigger == TriggerType.Application)
{
byte[] executingScriptHash = ExecutionEngine.ExecutingScriptHash;
// Add the code associated with the contract invocation here
switch (operation)
{
case "name": return("Qlc Swap");
case "lock":
if (args.Length != 3)
{
return("code:0, msg:The lock method need three parameters.");
}
return(Lock((byte[])args[0], executingScriptHash, (BigInteger)args[1], (byte[])args[2]));
case "init":
return(Init());
case "querySwapInfo":
{
if (args.Length != 1)
{
return("code:0, msg:The querySwapInfo method need one parameter.");
}
StorageMap SWAP_MAP = Storage.CurrentContext.CreateMap(nameof(SWAP_MAP));
var result = SWAP_MAP.Get((byte[])args[0]);
if (result.Length == 0)
{
return("code:0, msg:The swap info not found.");
}
SwapInfo swapInfo = Helper.Deserialize(result) as SwapInfo;
return(swapInfo);
};
case "getOwner":
return(GetOwner());
}
// owner check
if (!Runtime.CheckWitness(GetOwner()))
{
return("code:0, msg:Only owner.");
}
switch (operation)
{
case "unlock":
if (args.Length != 4)
{
return("code:0, msg:The unlock method need four parameters.");
}
return(Unlock(executingScriptHash, (byte[])args[0], (BigInteger)args[1], (byte[])args[2], (byte[])args[3]));
case "transferOwner":
if (args.Length != 1)
{
return("code:0, msg:The transferOwner method need one parameter.");
}
return(TransferOwner((byte[])args[0]));
}
}
return(false);
}