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Updated on 2026-08-14

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This commit is contained in:
Tangem 2018-12-17 12:10:58 +03:00
parent 97c60b5f9d
commit b641f2eac7
1 changed files with 62 additions and 27 deletions
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89
app/src/main/java/com/tangem/domain/wallet/CoinEngine.java
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@ -27,36 +27,35 @@ public abstract class CoinEngine {
public InternalAmount() {
super(0);
currency="";
currency = "";
}
public InternalAmount(String amountString, String currency) {
super(amountString.replace(',','.'));
this.currency=currency;
super(amountString.replace(',', '.'));
this.currency = currency;
}
public InternalAmount(long amount, String currency) {
super(amount);
this.currency=currency;
this.currency = currency;
}
public InternalAmount(BigDecimal amount, String currency) {
super(amount.unscaledValue(), amount.scale());
this.currency=currency;
this.currency = currency;
}
public InternalAmount(BigInteger amount, String currency) {
super(new BigDecimal(amount).unscaledValue(), new BigDecimal(amount).scale());
this.currency=currency;
this.currency = currency;
}
public boolean notZero()
{
return compareTo(BigDecimal.ZERO)>0;
public boolean notZero() {
return compareTo(BigDecimal.ZERO) > 0;
}
public boolean isZero() {
return compareTo(BigDecimal.ZERO)==0;
return compareTo(BigDecimal.ZERO) == 0;
}
public String getCurrency() {
@ -74,7 +73,7 @@ public abstract class CoinEngine {
df.setGroupingUsed(false);
BigDecimal bd=new BigDecimal(unscaledValue(), scale());
BigDecimal bd = new BigDecimal(unscaledValue(), scale());
bd.setScale(decimals, ROUND_DOWN);
return df.format(bd);
}
@ -95,11 +94,11 @@ public abstract class CoinEngine {
public Amount() {
super(0);
currency="";
currency = "";
}
public Amount(String amountString, String currency) {
super(amountString.replace(',','.'));
super(amountString.replace(',', '.'));
this.currency = currency;
}
@ -122,13 +121,12 @@ public abstract class CoinEngine {
return super.toString() + " " + currency;
}
public boolean notZero()
{
return compareTo(BigDecimal.ZERO)>0;
public boolean notZero() {
return compareTo(BigDecimal.ZERO) > 0;
}
public String toDescriptionString(int decimals) {
return toValueString(decimals)+ " " + currency;
return toValueString(decimals) + " " + currency;
}
public String toValueString(int decimals) {
@ -142,7 +140,7 @@ public abstract class CoinEngine {
df.setGroupingUsed(false);
BigDecimal bd=new BigDecimal(unscaledValue(), scale());
BigDecimal bd = new BigDecimal(unscaledValue(), scale());
bd.setScale(decimals, ROUND_DOWN);
return df.format(bd);
}
@ -163,7 +161,7 @@ public abstract class CoinEngine {
}
public boolean isZero() {
return compareTo(BigDecimal.ZERO)==0;
return compareTo(BigDecimal.ZERO) == 0;
}
}
@ -222,9 +220,11 @@ public abstract class CoinEngine {
public abstract String calculateAddress(byte[] pkUncompressed) throws NoSuchProviderException, NoSuchAlgorithmException;
public abstract Amount convertToAmount(InternalAmount internalAmount) throws Exception;
public abstract Amount convertToAmount(String strAmount, String currency);
public abstract InternalAmount convertToInternalAmount(Amount amount) throws Exception;
public abstract InternalAmount convertToInternalAmount(byte[] bytes) throws Exception;
public abstract byte[] convertToByteArray(InternalAmount internalAmount) throws Exception;
@ -237,39 +237,66 @@ public abstract class CoinEngine {
try {
String wallet = calculateAddress(ctx.getCard().getWalletPublicKey());
ctx.getCoinData().setWallet(wallet);
}
catch (Exception e)
{
} catch (Exception e) {
ctx.getCoinData().setWallet("ERROR");
throw new CardProtocol.TangemException("Can't define wallet address");
}
}
/**
* Create instance of {@link SignTask.PaymentToSign} used for transaction signing and sending
*
* Transaction processing sequence:
* 1. User enter transaction attributes
* 2. Application create instance of {@link SignTask.PaymentToSign} by call {@see constructPayment}
* 3. Application set notification when transaction were prepared {@see setOnNeedSendPayment} and start {@link SignTask}
* 4. User tap card and card sign transaction
* 5. Application receive {@link CoinEngine.OnNeedSendPayment} notification with prepared raw transaction
* 6. Application show user information that transaction ready for sending and start sending procedure by call {@see requestSendTransaction}
* 7. Application receive notification of sending result through {@link CoinEngine.BlockchainRequestsCallbacks} and show result to user
*
* @param amountValue - amount of desired transaction
* @param feeValue - fee amount of desired transaction
* @param IncFee - true if fee amount is included in amountValue (amountValue is total amount of transaction)
* @param targetAddress - target address of transaction
* @return instance of {@link SignTask.PaymentToSign}
* @throws Exception if something goes wrong
*/
public abstract SignTask.PaymentToSign constructPayment(Amount amountValue, Amount feeValue, boolean IncFee, String targetAddress) throws Exception;
public interface OnNeedSendPayment
{
/**
* Interface used to notify main application when new transaction is prepared to send
*/
public interface OnNeedSendPayment {
void onPaymentPrepared(byte[] txForSend);
}
protected OnNeedSendPayment onNeedSendPayment;
/**
* Set notification callback when new transaction is prepared to send
*/
public void setOnNeedSendPayment(OnNeedSendPayment onNeedSendPayment) {
this.onNeedSendPayment = onNeedSendPayment;
}
protected void notifyOnNeedSendPayment(byte[] txForSend) throws Exception {
if(onNeedSendPayment==null)
if (onNeedSendPayment == null)
throw new Exception("Payment signed but no callback defined to send!");
onNeedSendPayment.onPaymentPrepared(txForSend);
}
public interface BlockchainRequestsCallbacks
{
/**
* Interface used to notify/querying application during processing sequence of request to blockchain nodes/servers
*/
public interface BlockchainRequestsCallbacks {
/**
* Notification that the all requests in sequence completed
* Call after a last request completed
* If occurred error return in ctx.error
*
* @param success -*
*/
void onComplete(Boolean success);
@ -283,10 +310,18 @@ public abstract class CoinEngine {
/**
* Return flag that allow to add new or re-requests in the sequence
* Call between requests or when request fail and before re-request
*
* @return true if not need terminate (e.g. activity is online)
*/
boolean allowAdvance();
}
/**
* Start sequence of request to blockchain nodes needed to get balance and other information (for example unspent transaction) needed to
* show current state of wallet and prepare new withdrawal transaction
* @param blockchainRequestsCallbacks - notifications
* @throws Exception
*/
public abstract void requestBalanceAndUnspentTransactions(BlockchainRequestsCallbacks blockchainRequestsCallbacks) throws Exception;
public abstract void requestFee(BlockchainRequestsCallbacks blockchainRequestsCallbacks, String targetAddress, Amount amount) throws Exception;