public void TestFromXdrAmount() { Assert.AreEqual("0", Operation.FromXdrAmount(0L)); Assert.AreEqual("0.0000001", Operation.FromXdrAmount(1L)); Assert.AreEqual("1", Operation.FromXdrAmount(10000000L)); Assert.AreEqual("1.1234567", Operation.FromXdrAmount(11234567L)); Assert.AreEqual("72991284.3007381", Operation.FromXdrAmount(729912843007381L)); Assert.AreEqual("101401671144.6800155", Operation.FromXdrAmount(1014016711446800155L)); Assert.AreEqual("922337203685.4775807", Operation.FromXdrAmount(9223372036854775807L)); }
public async Task <string> BuildTransactionAsync(Guid operationId, AddressBalance from, string toAddress, string memoText, long amount) { var fromKeyPair = KeyPair.FromAccountId(from.Address); var fromAccount = new Account(fromKeyPair, from.Sequence); var toKeyPair = KeyPair.FromAccountId(toAddress); var transferableBalance = from.Balance - from.MinBalance; Operation operation; if (await _horizonService.AccountExists(toAddress)) { if (amount <= transferableBalance) { var asset = new AssetTypeNative(); operation = new PaymentOperation.Builder(toKeyPair, asset, Operation.FromXdrAmount(amount)) .SetSourceAccount(fromKeyPair) .Build(); } else if (!_balanceService.IsDepositBaseAddress(from.Address)) { operation = new AccountMergeOperation.Builder(toKeyPair) .SetSourceAccount(fromKeyPair) .Build(); } else { throw new BusinessException($"It isn't allowed to merge the entire balance from the deposit base into another account! Transfer less funds. transferable={transferableBalance}"); } } else { if (amount <= transferableBalance) { operation = new CreateAccountOperation.Builder(toKeyPair, Operation.FromXdrAmount(amount)) .SetSourceAccount(fromKeyPair) .Build(); } else { throw new BusinessException($"It isn't possible to merge the entire balance into an unused account! Use a destination in existance. transferable={transferableBalance}"); } } var builder = new TransactionBuilder(fromAccount) .AddOperation(operation) .SetFee(_appSettings.StellarApiService.OperationFee); if (!string.IsNullOrWhiteSpace(memoText)) { var memo = new MemoText(memoText); builder = builder.AddMemo(memo); } var tx = builder.Build(); var xdr = tx.ToUnsignedEnvelopeXdr(TransactionBase.TransactionXdrVersion.V1); var expirationDate = (DateTime.UtcNow + _transactionExpirationTime); var maxUnixTimeDouble = expirationDate.ToUnixTime() / 1000;//ms to seconds var maxTimeUnix = (ulong)maxUnixTimeDouble; xdr.V1.Tx.TimeBounds = new TimeBounds() { MaxTime = new TimePoint(new Uint64(maxTimeUnix)), MinTime = new TimePoint(new Uint64(0)), }; var writer = new XdrDataOutputStream(); stellar_dotnet_sdk.xdr.TransactionEnvelope.Encode(writer, xdr); var xdrBase64 = Convert.ToBase64String(writer.ToArray()); _log.Info("Transaction has been built", new { OperationId = operationId, From = from, To = toAddress, Memo = memoText, Amount = amount, Fee = tx.Fee, Sequence = tx.SequenceNumber, MaxTimeUnix = maxTimeUnix }); var build = new TxBuild { OperationId = operationId, XdrBase64 = xdrBase64 }; await _buildRepository.AddAsync(build); return(xdrBase64); }