public int GetChainStatus(Hash chainId)
{
Api.Assert(_sideChainInfos.GetValue(chainId) != null, "Not existed side chain.");
var info = _sideChainInfos[chainId];
return((int)info.Status);
}
public void WriteParentChainBlockInfo(ParentChainBlockInfo parentChainBlockInfo)
{
ulong parentChainHeight = parentChainBlockInfo.Height;
var currentHeight = _currentParentChainHeight.GetValue();
var target = currentHeight != 0 ? currentHeight + 1: GlobalConfig.GenesisBlockHeight;
Api.Assert(target == parentChainHeight,
$"Parent chain block info at height {target} is needed, not {parentChainHeight}");
Console.WriteLine("ParentChainBlockInfo.Height is correct.");
var key = new UInt64Value {
Value = parentChainHeight
};
Api.Assert(_parentChainBlockInfo.GetValue(key) == null,
$"Already written parent chain block info at height {parentChainHeight}");
Console.WriteLine("Writing ParentChainBlockInfo..");
foreach (var _ in parentChainBlockInfo.IndexedBlockInfo)
{
BindParentChainHeight(_.Key, parentChainHeight);
AddIndexedTxRootMerklePathInParentChain(_.Key, _.Value);
}
_parentChainBlockInfo.SetValueAsync(key, parentChainBlockInfo).Wait();
_currentParentChainHeight.SetValue(parentChainHeight);
// only for debug
Console.WriteLine($"WriteParentChainBlockInfo success at {parentChainHeight}");
}
public byte[] LockedAddress(Hash chainId)
{
Api.Assert(_sideChainInfos.GetValue(chainId) != null, "Not existed side chain.");
var info = _sideChainInfos[chainId];
Api.Assert(info.Status != (SideChainStatus)3, "Disposed side chain.");
return(info.LockedAddress.DumpByteArray());
}
public ulong LockedToken(Hash chainId)
{
Api.Assert(_sideChainInfos.GetValue(chainId) != null, "Not existed side chain.");
var info = _sideChainInfos[chainId];
Api.Assert(info.Status != (SideChainStatus)3, "Disposed side chain.");
return(info.LockedToken);
}
public void TransferFrom(Address from, Address to, ulong amount)
{
var allowance = Allowances.GetAllowance(from, Api.GetTransaction().From);
Api.Assert(allowance > amount, "Insufficient allowance.");
DoTransfer(from, to, amount);
Allowances.Reduce(from, amount);
}
public void Initialize(string symbol, string tokenName, ulong totalSupply, uint decimals)
{
Api.Assert(!_initialized.GetValue(), "Already initialized.");
// Api.Assert(Api.GetContractOwner().Equals(Api.GetTransaction().From), "Only owner can initialize the contract state.");
_symbol.SetValue(symbol);
_tokenName.SetValue(tokenName);
_totalSupply.SetValue(totalSupply);
_decimals.SetValue(decimals);
_balances[Api.GetTransaction().From] = totalSupply;
_initialized.SetValue(true);
}
private void AddIndexedTxRootMerklePathInParentChain(ulong height, MerklePath path)
{
var key = new UInt64Value {
Value = height
};
Api.Assert(_txRootMerklePathInParentChain.GetValue(key) == null,
$"Merkle path already bound at height {height}.");
// _txRootMerklePathInParentChain[key] = path;
_txRootMerklePathInParentChain.SetValueAsync(key, path).Wait();
Console.WriteLine("Path: {0}", path.Path[0].DumpHex());
}
private void BindParentChainHeight(ulong childHeight, ulong parentHeight)
{
var key = new UInt64Value {
Value = childHeight
};
Api.Assert(_childHeightToParentChainHeight.GetValue(key) == null,
$"Already bound at height {childHeight} with parent chain");
// _childHeightToParentChainHeight[key] = new UInt64Value {Value = parentHeight};
_childHeightToParentChainHeight.SetValueAsync(key, new UInt64Value {
Value = parentHeight
}).Wait();
}
public void DisposeSideChain(Hash chainId)
{
Api.Assert(_sideChainInfos.GetValue(chainId) != null, "Not existed side chain");
// TODO: Only privileged account can trigger this method
var info = _sideChainInfos[chainId];
info.Status = SideChainStatus.Terminated;
_sideChainInfos[chainId] = info;
new SideChainDisposal
{
chainId = chainId
}.Fire();
}
public bool VerifyTransaction(Hash tx, MerklePath path, ulong parentChainHeight)
{
var key = new UInt64Value {
Value = parentChainHeight
};
Api.Assert(_parentChainBlockInfo.GetValue(key) != null,
$"Parent chain block at height {parentChainHeight} is not recorded.");
var rootCalculated = path.ComputeRootWith(tx);
var parentRoot = _parentChainBlockInfo.GetValue(key)?.Root?.SideChainTransactionsRoot;
//Api.Assert((parentRoot??Hash.Zero).Equals(rootCalculated), "Transaction verification Failed");
return((parentRoot ?? Hash.Zero).Equals(rootCalculated));
}
public void ApproveSideChain(Hash chainId)
{
// TODO: Only privileged account can trigger this method
var info = _sideChainInfos[chainId];
Api.Assert(info != null, "Invalid chain id.");
Api.Assert(info?.Status == SideChainStatus.Pending, "Invalid chain status.");
info.Status = SideChainStatus.Active;
_sideChainInfos[chainId] = info;
new SideChainCreationRequestApproved()
{
Info = info.Clone()
}.Fire();
}
private void DoTransfer(Address from, Address to, ulong amount)
{
var balSender = _balances[from];
Api.Assert(balSender >= amount, "Insufficient balance.");
var balReceiver = _balances[to];
balSender = balSender.Sub(amount);
balReceiver = balReceiver.Add(amount);
_balances[from] = balSender;
_balances[to] = balReceiver;
new Transfered()
{
From = from,
To = to,
Amount = amount
}.Fire();
}
public void Transfer(Hash to, ulong amount)
{
var from = Api.GetTransaction().From;
var balSender = _balances[from];
Api.Assert(balSender > amount, "Insufficient balance.");
var balReceiver = _balances[to];
balSender = balSender.Sub(amount);
balReceiver = balReceiver.Add(amount);
_balances[from] = balSender;
_balances[to] = balReceiver;
new Transfered()
{
From = from,
To = to,
Amount = amount
}.Fire();
}