public override bool Validate()
{
if (this.contract == null)
{
throw new ContractValidateException("No contract!");
}
if (this.db_manager == null)
{
throw new ContractValidateException("No this.db_manager!");
}
if (!this.contract.Is(ExchangeCreateContract.Descriptor))
{
ExchangeCreateContract contract = null;
try
{
contract = this.contract.Unpack <ExchangeCreateContract>();
}
catch (InvalidProtocolBufferException e)
{
throw new ContractValidateException(e.Message);
}
byte[] owner_address = contract.OwnerAddress.ToByteArray();
if (!Wallet.IsValidAddress(owner_address))
{
throw new ContractValidateException("Invalid address");
}
if (!this.db_manager.Account.Contains(owner_address))
{
throw new ContractValidateException("account[" + owner_address.ToHexString() + "] not exists");
}
AccountCapsule account = this.db_manager.Account.Get(owner_address);
if (account.Balance < CalcFee())
{
throw new ContractValidateException("No enough balance for exchange create fee!");
}
byte[] first_token_id = contract.FirstTokenId.ToByteArray();
byte[] secodn_token_id = contract.SecondTokenId.ToByteArray();
long first_token_balance = contract.FirstTokenBalance;
long second_token_balance = contract.SecondTokenBalance;
if (this.db_manager.DynamicProperties.GetAllowSameTokenName() == 1)
{
if (!first_token_id.SequenceEqual(COMPARE_CHARICTOR) && !TransactionUtil.IsNumber(first_token_id))
{
throw new ContractValidateException("first token id is not a valid number");
}
if (!secodn_token_id.SequenceEqual(COMPARE_CHARICTOR) && !TransactionUtil.IsNumber(secodn_token_id))
{
throw new ContractValidateException("second token id is not a valid number");
}
}
if (first_token_id.SequenceEqual(secodn_token_id))
{
throw new ContractValidateException("cannot exchange same tokens");
}
if (first_token_balance <= 0 || second_token_balance <= 0)
{
throw new ContractValidateException("token balance must greater than zero");
}
long balance_limit = this.db_manager.DynamicProperties.GetExchangeBalanceLimit();
if (first_token_balance > balance_limit || second_token_balance > balance_limit)
{
throw new ContractValidateException("token balance must less than " + balance_limit);
}
if (first_token_id.SequenceEqual(COMPARE_CHARICTOR))
{
if (account.Balance < (first_token_balance + CalcFee()))
{
throw new ContractValidateException("balance is not enough");
}
}
else
{
if (!account.AssetBalanceEnoughV2(first_token_id, first_token_balance, this.db_manager))
{
throw new ContractValidateException("first token balance is not enough");
}
}
if (secodn_token_id.SequenceEqual(COMPARE_CHARICTOR))
{
if (account.Balance < (second_token_balance + CalcFee()))
{
throw new ContractValidateException("balance is not enough");
}
}
else
{
if (!account.AssetBalanceEnoughV2(secodn_token_id, second_token_balance, this.db_manager))
{
throw new ContractValidateException("second token balance is not enough");
}
}
}
else
{
throw new ContractValidateException(
"contract type error,expected type [ExchangeCreateContract],real type[" + this.contract.GetType().Name + "]");
}
return(true);
}
public override bool Execute(TransactionResultCapsule result)
{
long fee = CalcFee();
try
{
ExchangeCreateContract exchange_create_contract = this.contract.Unpack <ExchangeCreateContract>();
AccountCapsule account = this.db_manager.Account.Get(exchange_create_contract.OwnerAddress.ToByteArray());
byte[] first_token_id = exchange_create_contract.FirstTokenId.ToByteArray();
byte[] secodn_token_id = exchange_create_contract.SecondTokenId.ToByteArray();
long first_token_balance = exchange_create_contract.FirstTokenBalance;
long second_token_balance = exchange_create_contract.SecondTokenBalance;
long new_balance = account.Balance - fee;
account.Balance = new_balance;
if (first_token_id.SequenceEqual(COMPARE_CHARICTOR))
{
account.Balance = new_balance - first_token_balance;
}
else
{
account.ReduceAssetAmountV2(first_token_id, first_token_balance, this.db_manager);
}
if (secodn_token_id.SequenceEqual(COMPARE_CHARICTOR))
{
account.Balance = new_balance - second_token_balance;
}
else
{
account.ReduceAssetAmountV2(secodn_token_id, second_token_balance, this.db_manager);
}
long id = this.db_manager.DynamicProperties.GetLatestExchangeNum() + 1;
long now = this.db_manager.GetHeadBlockTimestamp();
if (this.db_manager.DynamicProperties.GetAllowSameTokenName() == 0)
{
ExchangeCapsule exchange = new ExchangeCapsule(
exchange_create_contract.OwnerAddress,
id,
now,
first_token_id,
secodn_token_id);
exchange.SetBalance(first_token_balance, second_token_balance);
this.db_manager.Exchange.Put(exchange.CreateDatabaseKey(), exchange);
if (!first_token_id.SequenceEqual(COMPARE_CHARICTOR))
{
string first_id = this.db_manager.AssetIssue.Get(first_token_id).Id;
first_token_id = Encoding.UTF8.GetBytes(first_id);
}
if (!secodn_token_id.SequenceEqual(COMPARE_CHARICTOR))
{
string second_id = this.db_manager.AssetIssue.Get(secodn_token_id).Id;
secodn_token_id = Encoding.UTF8.GetBytes(second_id);
}
}
ExchangeCapsule exchange_v2 = new ExchangeCapsule(
exchange_create_contract.OwnerAddress,
id,
now,
first_token_id,
secodn_token_id);
exchange_v2.SetBalance(first_token_balance, second_token_balance);
this.db_manager.ExchangeV2.Put(exchange_v2.CreateDatabaseKey(), exchange_v2);
this.db_manager.Account.Put(account.CreateDatabaseKey(), account);
this.db_manager.DynamicProperties.PutLatestExchangeNum(id);
this.db_manager.AdjustBalance(this.db_manager.Account.GetBlackHole().CreateDatabaseKey(), fee);
result.ExchangeId = id;
result.SetStatus(fee, code.Sucess);
}
catch (BalanceInsufficientException e)
{
Logger.Debug(e.Message);
result.SetStatus(fee, code.Failed);
throw new ContractExeException(e.Message);
}
catch (InvalidProtocolBufferException e)
{
Logger.Debug(e.Message);
result.SetStatus(fee, code.Failed);
throw new ContractExeException(e.Message);
}
return(true);
}
public async Task <TransactionExtention> ExchangeCreate(ExchangeCreateContract contract)
{
return(await _grpcClient.ExchangeCreateAsync(contract));
}
