Updated on 2026-08-14
This commit is contained in:
Tangem
commit
bd8d84a85a
680 changed files with 51751 additions and 6799 deletions
514
app/src/main/java/com/tangem/wallet/xlm/XlmEngine.java
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514
app/src/main/java/com/tangem/wallet/xlm/XlmEngine.java
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@ -0,0 +1,514 @@
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package com.tangem.domain.wallet.xlm;
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import android.net.Uri;
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import android.text.InputFilter;
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import android.util.Log;
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import com.tangem.data.Blockchain;
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import com.tangem.data.network.ServerApiStellar;
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import com.tangem.data.network.StellarRequest;
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import com.tangem.domain.wallet.BalanceValidator;
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import com.tangem.domain.wallet.CoinData;
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import com.tangem.domain.wallet.CoinEngine;
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import com.tangem.domain.wallet.TangemContext;
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import com.tangem.tangemcard.data.TangemCard;
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import com.tangem.tangemcard.tasks.SignTask;
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import com.tangem.tangemcard.util.Util;
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import com.tangem.util.DecimalDigitsInputFilter;
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import com.tangem.wallet.R;
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import org.stellar.sdk.AssetTypeNative;
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import org.stellar.sdk.KeyPair;
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import org.stellar.sdk.PaymentOperation;
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import org.stellar.sdk.Transaction;
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import org.stellar.sdk.TransactionEx;
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import java.io.IOException;
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import java.math.BigDecimal;
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/**
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* Created by dvol on 7.01.2019.
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*
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* PS. To create and fill testnet account just open https://friendbot.stellar.org/?addr=XXX in browser
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**/
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public class XlmEngine extends CoinEngine {
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private static final String TAG = XlmEngine.class.getSimpleName();
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public XlmData coinData = null;
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public XlmEngine(TangemContext context) throws Exception {
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super(context);
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if (context.getCoinData() == null) {
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coinData = new XlmData();
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context.setCoinData(coinData);
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} else if (context.getCoinData() instanceof XlmData) {
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coinData = (XlmData) context.getCoinData();
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} else {
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throw new Exception("Invalid type of Blockchain data for XlmEngine");
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}
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}
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public XlmEngine() {
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super();
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}
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private static int getDecimals() {
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//TODO - Is it's right?
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return 8;
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}
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private void checkBlockchainDataExists() throws Exception {
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if (coinData == null) throw new Exception("No blockchain data");
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}
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@Override
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public boolean awaitingConfirmation() {
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if (coinData == null) return false;
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//TODO
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return false;//coinData.getBalanceUnconfirmed() != 0;
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}
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@Override
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public String getBalanceHTML() {
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Amount balance = getBalance();
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if (balance != null) {
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return balance.toDescriptionString(getDecimals());
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} else {
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return "";
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}
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}
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@Override
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public String getBalanceCurrency() {
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return "XLM";
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}
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@Override
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public String getOfflineBalanceHTML() {
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InternalAmount offlineInternalAmount = convertToInternalAmount(ctx.getCard().getOfflineBalance());
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Amount offlineAmount = convertToAmount(offlineInternalAmount);
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return offlineAmount.toDescriptionString(getDecimals());
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}
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@Override
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public boolean isBalanceNotZero() {
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if (coinData == null) return false;
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if (coinData.getBalanceXLM() == null) return false;
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return coinData.getBalanceXLM().notZero();
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}
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@Override
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public boolean hasBalanceInfo() {
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if (coinData == null) return false;
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return coinData.getBalanceXLM() != null;
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}
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@Override
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public boolean isExtractPossible() {
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if (!hasBalanceInfo()) {
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ctx.setMessage(R.string.cannot_obtain_data_from_blockchain);
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} else if (!isBalanceNotZero()) {
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ctx.setMessage(R.string.wallet_empty);
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} else if (awaitingConfirmation()) {
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ctx.setMessage(R.string.please_wait_while_previous);
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} else {
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return true;
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}
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return false;
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}
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@Override
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public String getFeeCurrency() {
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return "XLM";
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}
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@Override
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public boolean validateAddress(String address) {
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try {
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KeyPair kp = KeyPair.fromAccountId(address);
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// TODO is it possible to check address testNet or not
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// if (ctx.getBlockchain() == Blockchain.StellarTestNet) {
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// return false;
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// }
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} catch (Exception e) {
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return false;
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}
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return true;
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}
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@Override
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public boolean isNeedCheckNode() {
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return false;
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}
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@Override
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public Uri getShareWalletUriExplorer() {
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return Uri.parse((ctx.getBlockchain() == Blockchain.Bitcoin ? "http://testnet.stellarchain.io/address/" : "http://testnet.stellarchain.io/address/") + ctx.getCoinData().getWallet());
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}
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@Override
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public Uri getShareWalletUri() {
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//TODO - how to construct payment query intent for stellar?
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if (ctx.getCard().getDenomination() != null) {
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return Uri.parse("stellar:" + ctx.getCoinData().getWallet() + "?amount=" + convertToAmount(convertToInternalAmount(ctx.getCard().getDenomination())).toValueString());
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} else {
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return Uri.parse("stellar:" + ctx.getCoinData().getWallet());
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}
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}
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@Override
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public InputFilter[] getAmountInputFilters() {
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return new InputFilter[]{new DecimalDigitsInputFilter(getDecimals())};
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}
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@Override
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public boolean checkNewTransactionAmount(Amount amount) {
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if (coinData == null) return false;
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if (amount.compareTo(coinData.getBalanceXLM()) > 0) {
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return false;
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}
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return true;
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}
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@Override
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public boolean checkNewTransactionAmountAndFee(Amount amountValue, Amount feeValue, Boolean isIncludeFee) {
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try {
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checkBlockchainDataExists();
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} catch (Exception e) {
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e.printStackTrace();
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return false;
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}
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if (feeValue == null || amountValue == null)
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return false;
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if (feeValue.isZero() || amountValue.isZero())
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return false;
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if (isIncludeFee && (amountValue.compareTo(coinData.getBalanceXLM()) > 0 || amountValue.compareTo(feeValue) < 0))
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return false;
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if (!isIncludeFee && amountValue.add(feeValue).compareTo(coinData.getBalanceXLM()) > 0)
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return false;
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return true;
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}
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@Override
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public boolean validateBalance(BalanceValidator balanceValidator) {
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try {
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if (((ctx.getCard().getOfflineBalance() == null) && !ctx.getCoinData().isBalanceReceived()) || (!ctx.getCoinData().isBalanceReceived() && (ctx.getCard().getRemainingSignatures() != ctx.getCard().getMaxSignatures()))) {
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balanceValidator.setScore(0);
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balanceValidator.setFirstLine("Unknown balance");
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balanceValidator.setSecondLine("Balance cannot be verified. Swipe down to refresh.");
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return false;
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}
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// Workaround before new back-end
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// if (card.getRemainingSignatures() == card.getMaxSignatures()) {
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// firstLine = "Verified balance";
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// secondLine = "Balance confirmed in blockchain. ";
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// secondLine += "Verified note identity. ";
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// return;
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// }
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// if (coinData.getBalanceUnconfirmed() != 0) {
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// balanceValidator.setScore(0);
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// balanceValidator.setFirstLine("Transaction in progress");
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// balanceValidator.setSecondLine("Wait for confirmation in blockchain");
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// return false;
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// }
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if (coinData.isBalanceReceived() && coinData.isBalanceEqual()) {
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balanceValidator.setScore(100);
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balanceValidator.setFirstLine("Verified balance");
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balanceValidator.setSecondLine("Balance confirmed in blockchain");
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if (coinData.getBalanceXLM().isZero()) {
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balanceValidator.setFirstLine("Empty wallet");
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balanceValidator.setSecondLine("");
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}
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}
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// rule 4 TODO: need to check SignedHashed against number of outputs in blockchain
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// if((card.getRemainingSignatures() != card.getMaxSignatures()) && card.getBalance() != 0)
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// {
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// score = 80;
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// firstLine = "Unguaranteed balance";
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// secondLine = "Potential unsent transaction. Redeem immediately if accept. ";
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// return;
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// }
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if ((ctx.getCard().getOfflineBalance() != null) && !coinData.isBalanceReceived() && (ctx.getCard().getRemainingSignatures() == ctx.getCard().getMaxSignatures()) && coinData.getBalanceXLM().notZero()) {
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balanceValidator.setScore(80);
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balanceValidator.setFirstLine("Verified offline balance");
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balanceValidator.setSecondLine("Can't obtain balance from blockchain. Restore internet connection to be more confident. ");
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}
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// if(card.getFailedBalanceRequestCounter()!=0) {
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// score -= 5 * card.getFailedBalanceRequestCounter();
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// secondLine += "Not all nodes have returned balance. Swipe down or tap again. ";
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// if(score <= 0)
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// return;
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// }
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//
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// if(card.isBalanceReceived() && !card.isBalanceEqual()) {
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// score = 0;
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// firstLine = "Disputed balance";
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// secondLine += " Cannot obtain trusted balance at the moment. Try to tap and check this banknote later.";
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// return;
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// }
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return true;
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} catch (Exception e) {
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e.printStackTrace();
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return false;
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}
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}
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@Override
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public Amount getBalance() {
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if (!hasBalanceInfo()) return null;
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return coinData.getBalanceXLM();
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}
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@Override
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public String evaluateFeeEquivalent(String fee) {
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if (!coinData.getAmountEquivalentDescriptionAvailable()) return "";
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try {
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Amount feeAmount = new Amount(fee, getFeeCurrency());
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return feeAmount.toEquivalentString(coinData.getRate());
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} catch (Exception e) {
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return "";
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}
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}
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@Override
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public String getBalanceEquivalent() {
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if (coinData == null || !coinData.getAmountEquivalentDescriptionAvailable()) return "";
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Amount balance = getBalance();
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if (balance == null) return "";
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return balance.toEquivalentString(coinData.getRate());
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}
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@Override
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public String calculateAddress(byte[] pkUncompressed) {
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KeyPair kp = KeyPair.fromPublicKey(pkUncompressed);
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return kp.getAccountId();
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}
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private static BigDecimal multiplier = new BigDecimal("10000000");
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@Override
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public Amount convertToAmount(InternalAmount internalAmount) {
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BigDecimal d = internalAmount.divide(multiplier);
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return new Amount(d, getBalanceCurrency());
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}
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@Override
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public Amount convertToAmount(String strAmount, String currency) {
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return new Amount(strAmount, currency);
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}
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@Override
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public InternalAmount convertToInternalAmount(Amount amount) {
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BigDecimal d = amount.multiply(multiplier);
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return new InternalAmount(d, "stroops");
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}
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@Override
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public InternalAmount convertToInternalAmount(byte[] bytes) {
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if (bytes == null) return null;
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byte[] reversed = new byte[bytes.length];
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for (int i = 0; i < bytes.length; i++) reversed[i] = bytes[bytes.length - i - 1];
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return new InternalAmount(Util.byteArrayToLong(reversed), "stroops");
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}
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@Override
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public byte[] convertToByteArray(InternalAmount internalAmount) {
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byte[] bytes = Util.longToByteArray(internalAmount.longValueExact());
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byte[] reversed = new byte[bytes.length];
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for (int i = 0; i < bytes.length; i++) reversed[i] = bytes[bytes.length - i - 1];
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return reversed;
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}
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@Override
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public CoinData createCoinData() {
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return new XlmData();
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}
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@Override
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public String getUnspentInputsDescription() {
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return "";
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}
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@Override
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public SignTask.PaymentToSign constructPayment(Amount amountValue, Amount feeValue, boolean IncFee, String targetAddress) throws Exception {
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checkBlockchainDataExists();
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if( IncFee )
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{
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amountValue=new Amount(amountValue.subtract(feeValue), amountValue.getCurrency());
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}
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TransactionEx transaction = TransactionEx.buildEx(60, coinData.getAccountResponse(), new PaymentOperation.Builder(KeyPair.fromAccountId(targetAddress), new AssetTypeNative(), amountValue.toValueString()).build());
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if( transaction.getFee()!=convertToInternalAmount(feeValue).intValueExact() )
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{
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throw new Exception("Invalid fee!");
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}
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return new SignTask.PaymentToSign() {
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@Override
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public boolean isSigningMethodSupported(TangemCard.SigningMethod signingMethod) {
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return signingMethod == TangemCard.SigningMethod.Sign_Hash || signingMethod == TangemCard.SigningMethod.Sign_Raw;
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}
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@Override
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public byte[][] getHashesToSign() throws Exception {
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byte[][] dataForSign = new byte[1][];
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dataForSign[0] = transaction.hash();
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return dataForSign;
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}
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@Override
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public byte[] getRawDataToSign() throws Exception {
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return transaction.signatureBase();
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}
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@Override
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public String getHashAlgToSign() {
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return "sha-256";
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}
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@Override
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public byte[] getIssuerTransactionSignature(byte[] dataToSignByIssuer) throws Exception {
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throw new Exception("Issuer validation not supported!");
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}
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@Override
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public byte[] onSignCompleted(byte[] signFromCard) throws Exception {
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// Sign the transaction to prove you are actually the person sending it.
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transaction.setSign(signFromCard);
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byte[] txForSend = transaction.toEnvelopeXdrBase64().getBytes();
|
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notifyOnNeedSendPayment(txForSend);
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return txForSend;
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}
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};
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}
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@Override
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public void requestBalanceAndUnspentTransactions(BlockchainRequestsCallbacks blockchainRequestsCallbacks) {
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final ServerApiStellar serverApi = new ServerApiStellar();
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ServerApiStellar.Listener listener = new ServerApiStellar.Listener() {
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@Override
|
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public void onSuccess(StellarRequest.Base request) {
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Log.i(TAG, "onSuccess: " + request.getClass().getSimpleName());
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if (!StellarRequest.Balance.class.isInstance(request)) {
|
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ctx.setError("Invalid request logic");
|
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blockchainRequestsCallbacks.onComplete(false);
|
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return;
|
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}
|
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StellarRequest.Balance balanceRequest = (StellarRequest.Balance) request;
|
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|
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coinData.setAccountResponse(balanceRequest.accountResponse);
|
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if (serverApi.isRequestsSequenceCompleted()) {
|
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blockchainRequestsCallbacks.onComplete(!ctx.hasError());
|
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} else {
|
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blockchainRequestsCallbacks.onProgress();
|
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}
|
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}
|
||||
|
||||
|
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@Override
|
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public void onFail(StellarRequest.Base request) {
|
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Log.i(TAG, "onFail: " + request.getClass().getSimpleName() + " " + request.getError());
|
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ctx.setError(request.getError());
|
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if (serverApi.isRequestsSequenceCompleted()) {
|
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blockchainRequestsCallbacks.onComplete(false);
|
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} else {
|
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blockchainRequestsCallbacks.onProgress();
|
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}
|
||||
}
|
||||
};
|
||||
|
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serverApi.setListener(listener);
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|
||||
serverApi.requestData(ctx, new StellarRequest.Balance(coinData.getWallet()));
|
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}
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@Override
|
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public void requestFee(BlockchainRequestsCallbacks blockchainRequestsCallbacks, String targetAddress, Amount amount) throws Exception {
|
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final int calcSize = 0;
|
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// todo - take BASE_FEE from last leger
|
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Log.e(TAG, String.format("Estimated tx size %d", calcSize));
|
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coinData.minFee = null;
|
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coinData.maxFee = null;
|
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coinData.normalFee = null;
|
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coinData.minFee = new Amount("0.00001", getFeeCurrency());
|
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coinData.normalFee = new Amount("0.00001", getFeeCurrency());
|
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coinData.maxFee = new Amount("0.00001", getFeeCurrency());
|
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blockchainRequestsCallbacks.onComplete(true);
|
||||
}
|
||||
|
||||
@Override
|
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public void requestSendTransaction(BlockchainRequestsCallbacks blockchainRequestsCallbacks, byte[] txForSend) throws IOException {
|
||||
final ServerApiStellar serverApi = new ServerApiStellar();
|
||||
|
||||
ServerApiStellar.Listener listener = new ServerApiStellar.Listener() {
|
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@Override
|
||||
public void onSuccess(StellarRequest.Base request) {
|
||||
try {
|
||||
if (!StellarRequest.SubmitTransaction.class.isInstance(request)) throw new Exception("Invalid request logic");
|
||||
StellarRequest.SubmitTransaction submitTransactionRequest = (StellarRequest.SubmitTransaction) request;
|
||||
if (submitTransactionRequest.response.isSuccess()) {
|
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ctx.setError(null);
|
||||
blockchainRequestsCallbacks.onComplete(true);
|
||||
} else {
|
||||
if( submitTransactionRequest.response.getExtras()!=null && submitTransactionRequest.response.getExtras().getResultCodes()!=null ) {
|
||||
String trResult = submitTransactionRequest.response.getExtras().getResultCodes().getTransactionResultCode();
|
||||
if( submitTransactionRequest.response.getExtras().getResultCodes().getOperationsResultCodes()!=null && submitTransactionRequest.response.getExtras().getResultCodes().getOperationsResultCodes().size()>0 ) {
|
||||
trResult+="/"+submitTransactionRequest.response.getExtras().getResultCodes().getOperationsResultCodes().get(0);
|
||||
}
|
||||
ctx.setError(trResult);
|
||||
}else{
|
||||
ctx.setError("transaction failed");
|
||||
}
|
||||
blockchainRequestsCallbacks.onComplete(false);
|
||||
}
|
||||
} catch (Exception e) {
|
||||
if (e.getMessage() != null) {
|
||||
ctx.setError(e.getMessage());
|
||||
blockchainRequestsCallbacks.onComplete(false);
|
||||
} else {
|
||||
ctx.setError(e.getClass().getName());
|
||||
blockchainRequestsCallbacks.onComplete(false);
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
@Override
|
||||
public void onFail(StellarRequest.Base request) {
|
||||
ctx.setError(request.getError());
|
||||
blockchainRequestsCallbacks.onComplete(false);
|
||||
}
|
||||
};
|
||||
serverApi.setListener(listener);
|
||||
|
||||
Transaction transaction = TransactionEx.fromEnvelopeXdr(new String(txForSend));
|
||||
coinData.incSequenceNumber();
|
||||
serverApi.requestData(ctx, new StellarRequest.SubmitTransaction(transaction));
|
||||
|
||||
}
|
||||
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue