GiftedHacker/tangem-app-android-audited
1
0
Fork 0
Code Issues Pull requests Projects Releases 1 Packages Wiki Activity Actions

Updated on 2026-08-14

Browse source
This commit is contained in:
Tangem 2019-02-22 18:43:31 +03:00
parent 3fa19dbdc9
commit 73be760859
1 changed files with 37 additions and 6 deletions
Download patch file Download diff file Expand all files Collapse all files

43
app/src/main/java/com/tangem/domain/wallet/cardano/CardanoEngine.java
View file

@ -154,9 +154,9 @@ public class CardanoEngine extends CoinEngine {
ByteArrayInputStream bais = new ByteArrayInputStream(decAddress);
try {
List<DataItem> addressList = ((Array)new CborDecoder(bais).decode().get(0)).getDataItems();
byte[] addressBytes = ((ByteString)addressList.get(0)).getBytes();
long addressChecksum = ((UnsignedInteger)addressList.get(1)).getValue().longValue();
List<DataItem> addressList = ((Array) new CborDecoder(bais).decode().get(0)).getDataItems();
byte[] addressBytes = ((ByteString) addressList.get(0)).getBytes();
long addressChecksum = ((UnsignedInteger) addressList.get(1)).getValue().longValue();
final CRC32 crc32 = new CRC32();
crc32.update(addressBytes);
@ -581,6 +581,25 @@ public class CardanoEngine extends CoinEngine {
};
}
private int calculateEstimatedTransactionSize(String targetAddress, Amount amount) {
Amount feeDummy = new Amount(new BigDecimal(0.2).setScale(getDecimals(), RoundingMode.DOWN), getFeeCurrency());
try {
OnNeedSendTransaction onNeedSendTransactionBackup = onNeedSendTransaction;
onNeedSendTransaction =(tx)->{}; // empty function to bypass exception
SignTask.TransactionToSign ttsDummy = constructTransaction(amount, feeDummy, true, targetAddress);
byte[] txForSendDummy = ttsDummy.onSignCompleted(new byte[64]);
onNeedSendTransaction = onNeedSendTransactionBackup;
Log.e(TAG, "txForSendDummy.length=" + String.valueOf(txForSendDummy.length));
return txForSendDummy.length;
} catch (Exception e) {
e.printStackTrace();
Log.e(TAG, "Can't calculate transaction size -> use default!");
return 1000;
}
}
@Override
public void requestBalanceAndUnspentTransactions(BlockchainRequestsCallbacks blockchainRequestsCallbacks) {
final ServerApiAdalite serverApiAdalite = new ServerApiAdalite();
@ -662,9 +681,16 @@ public class CardanoEngine extends CoinEngine {
@Override
public void requestFee(BlockchainRequestsCallbacks blockchainRequestsCallbacks, String targetAddress, Amount amount) {
coinData.minFee = new Amount(new BigDecimal(0.2).setScale(getDecimals(), RoundingMode.DOWN), getFeeCurrency());
coinData.normalFee = new Amount(new BigDecimal(0.2).setScale(getDecimals(), RoundingMode.DOWN), getFeeCurrency());
coinData.maxFee = new Amount(new BigDecimal(0.2).setScale(getDecimals(), RoundingMode.DOWN), getFeeCurrency());
final double A = 0.155381;
final double B = 0.000043946;
int calcSize = calculateEstimatedTransactionSize(targetAddress, amount);
double fee = A + B * calcSize;
Amount feeAmount = new Amount(new BigDecimal(fee).setScale(getDecimals(), RoundingMode.UP), getFeeCurrency());
coinData.minFee = feeAmount;
coinData.normalFee = feeAmount;
coinData.maxFee = feeAmount;
blockchainRequestsCallbacks.onComplete(true);
}
@ -725,4 +751,9 @@ public class CardanoEngine extends CoinEngine {
serverApiAdalite.requestData(ServerApiAdalite.ADALITE_SEND, "", txStr);
}
@Override
public boolean allowSelectFeeLevel() {
return false;
}
}