private async Task <SmartContractRegistrationCache> GetSmartContractRegistrationCacheFromLibCache(
IChainContext chainContext, Address address)
{
if (_smartContractRegistrationCacheProvider.TryGetLibCache(address,
out var smartContractRegistrationCache))
{
return(smartContractRegistrationCache);
}
if (chainContext.BlockHeight > 0 && _initLibBlockHeight == 0)
{
var chain = await _blockchainService.GetChainAsync();
_initLibBlockHash = chain.LastIrreversibleBlockHash;
_initLibBlockHeight = chain.LastIrreversibleBlockHeight;
}
//Use lib chain context to set lib cache. Genesis block need to execute with state cache
var context = new ChainContext
{
BlockHash = _initLibBlockHash,
BlockHeight = _initLibBlockHeight,
StateCache = chainContext.BlockHeight == 0 ? chainContext.StateCache : null
};
if (!_deployedContractAddressProvider.CheckContractAddress(context, address))
{
return(null);
}
SmartContractRegistration smartContractRegistration;
if (address == _defaultContractZeroCodeProvider.ContractZeroAddress)
{
smartContractRegistration = _defaultContractZeroCodeProvider.DefaultContractZeroRegistration;
if (context.BlockHeight > Constants.GenesisBlockHeight)
{
var executive = await GetExecutiveAsync(smartContractRegistration);
smartContractRegistration =
await GetSmartContractRegistrationFromZeroAsync(executive, context, address);
}
}
else
{
smartContractRegistration = await GetSmartContractRegistrationFromZeroAsync(context, address);
}
smartContractRegistrationCache = new SmartContractRegistrationCache
{
SmartContractRegistration = smartContractRegistration,
BlockHash = context.BlockHash,
BlockHeight = context.BlockHeight,
Address = address
};
_smartContractRegistrationCacheProvider.SetLibCache(address, smartContractRegistrationCache);
return(smartContractRegistrationCache);
}
public async Task <bool> ValidateTransactionAsync(Transaction transaction)
{
var chain = await _blockchainService.GetChainAsync();
var chainContext = new ChainContext
{
BlockHash = chain.BestChainHash,
BlockHeight = chain.BestChainHeight
};
if (_deployedContractAddressProvider.CheckContractAddress(chainContext, transaction.To))
{
return(true);
}
Logger.LogWarning($"Invalid contract address: {transaction}");
return(false);
}
public async Task <bool> ValidateTransactionAsync(Transaction transaction)
{
// Skip if this is a system transaction.
if (_feeExemptionService.IsFree(transaction))
{
return(true);
}
var chain = await _blockchainService.GetChainAsync();
var chainContext = new ChainContext
{
BlockHash = chain.BestChainHash,
BlockHeight = chain.BestChainHeight
};
// Skip if the sender is a contract.
if (_deployedContractAddressProvider.CheckContractAddress(chainContext, transaction.From))
{
return(true);
}
// Skip this validation at the very beginning of current chain.
if (chain.LastIrreversibleBlockHeight == Constants.GenesisBlockHeight)
{
return(true);
}
var tokenStub = _tokenContractReaderFactory.Create(chainContext);
var balance = (await tokenStub.GetBalance.CallAsync(new GetBalanceInput
{
Owner = transaction.From,
Symbol = await _primaryTokenSymbolProvider.GetPrimaryTokenSymbol()
}))?.Balance;
// balance == null means token contract hasn't deployed.
if (balance == null || balance > 0)
{
return(true);
}
Logger.LogWarning($"Empty balance of tx from address: {transaction}");
return(false);
}