public Transaction GenerateSideChainSend(KeyPair source, string tokenSymbol, Chain sourceChain, Address targetAddress, Chain targetChain, BigInteger amount, BigInteger fee)
{
Throw.IfNull(source, nameof(source));
Throw.If(!Nexus.TokenExists(tokenSymbol), "Token does not exist: " + tokenSymbol);
Throw.IfNull(sourceChain, nameof(sourceChain));
Throw.IfNull(targetChain, nameof(targetChain));
Throw.If(amount <= 0, "positive amount required");
if (source.Address == targetAddress && tokenSymbol == Nexus.FuelTokenSymbol)
{
Throw.If(fee != 0, "no fees for same address");
}
else
{
Throw.If(fee <= 0, "fee required when target is different address or token not native");
}
var sb = ScriptUtils.
BeginScript().
AllowGas(source.Address, Address.Null, 1, 9999);
if (targetAddress != source.Address)
{
sb.CallContract("token", "SendTokens", targetChain.Address, source.Address, source.Address, tokenSymbol, fee);
}
var script =
sb.CallContract("token", "SendTokens", targetChain.Address, source.Address, targetAddress, tokenSymbol, amount).
SpendGas(source.Address).
EndScript();
var tx = MakeTransaction(source, sourceChain, script);
_pendingEntries[sourceChain] = new SideChainPendingBlock()
{
sourceChain = sourceChain,
destChain = targetChain,
hash = null,
tokenSymbol = tokenSymbol
};
return(tx);
}
public IEnumerable <Block> EndBlock(Mempool mempool = null)
{
if (!blockOpen)
{
throw new Exception("Simulator block not open");
}
usedAddresses.Clear();
blockOpen = false;
var blocks = new List <Block>();
if (txChainMap.Count > 0)
{
var chains = txChainMap.Values.Distinct();
foreach (var chain in chains)
{
var hashes = txChainMap.Where((p) => p.Value == chain).Select(x => x.Key);
if (hashes.Any())
{
var txs = new List <Transaction>();
foreach (var hash in hashes)
{
txs.Add(txHashMap[hash]);
}
uint nextHeight = chain.LastBlock != null ? chain.LastBlock.Height + 1 : Chain.InitialHeight;
var prevHash = chain.LastBlock != null ? chain.LastBlock.Hash : Hash.Null;
var block = new Block(nextHeight, chain.Address, CurrentTime, hashes, prevHash);
bool submitted;
if (mempool != null)
{
submitted = true;
foreach (var tx in txs)
{
try
{
mempool.Submit(tx);
}
catch
{
submitted = false;
break;
}
}
}
else
{
try
{
chain.AddBlock(block, txs, null);
submitted = true;
}
catch (Exception e)
{
submitted = false;
}
}
if (submitted)
{
blocks.Add(block);
CurrentTime += TimeSpan.FromMinutes(45);
// add the finished block hash to each pending side chain tx
if (_pendingEntries.Count > 0)
{
foreach (var entry in _pendingEntries.Values)
{
if (entry.sourceChain != chain)
{
continue;
}
var pendingBlock = new SideChainPendingBlock()
{
sourceChain = entry.sourceChain,
destChain = entry.destChain,
hash = block.Hash,
tokenSymbol = entry.tokenSymbol
};
_pendingBlocks.Add(pendingBlock);
Logger.Debug($"...Sending {entry.sourceChain.Name}=>{entry.destChain.Name}: {block.Hash}");
}
}
Logger.Message($"End block #{step} @ {chain.Name} chain: {block.Hash}");
}
else
{
throw new Exception($"add block @ {chain.Name} failed");
}
}
}
_pendingEntries.Clear();
return(blocks);
}
return(Enumerable.Empty <Block>());
}