Revert "Calculate wallet balances from the transactions (ElectrumX) rather than using bitcoinj."

This reverts commit 892612c084.

# Conflicts:
#	src/main/java/org/qortal/crosschain/Bitcoiny.java

src/main/java/org/qortal/api/resource/CrossChainBitcoinResource.java

@@ -67,16 +67,11 @@ public class CrossChainBitcoinResource {
 		if (!bitcoin.isValidDeterministicKey(key58))
 			throw ApiExceptionFactory.INSTANCE.createException(request, ApiError.INVALID_PRIVATE_KEY);
 
-		try {
+		Long balance = bitcoin.getWalletBalance(key58);
-			Long balance = bitcoin.getWalletBalanceFromTransactions(key58);
 		if (balance == null)
 			throw ApiExceptionFactory.INSTANCE.createException(request, ApiError.FOREIGN_BLOCKCHAIN_NETWORK_ISSUE);
 
 		return balance.toString();
-
-		} catch (ForeignBlockchainException e) {
-			throw ApiExceptionFactory.INSTANCE.createException(request, ApiError.FOREIGN_BLOCKCHAIN_NETWORK_ISSUE);
-		}
 	}
 
 	@POST

src/main/java/org/qortal/api/resource/CrossChainDogecoinResource.java

@@ -65,16 +65,11 @@ public class CrossChainDogecoinResource {
 		if (!dogecoin.isValidDeterministicKey(key58))
 			throw ApiExceptionFactory.INSTANCE.createException(request, ApiError.INVALID_PRIVATE_KEY);
 
-		try {
+		Long balance = dogecoin.getWalletBalance(key58);
-			Long balance = dogecoin.getWalletBalanceFromTransactions(key58);
 		if (balance == null)
 			throw ApiExceptionFactory.INSTANCE.createException(request, ApiError.FOREIGN_BLOCKCHAIN_NETWORK_ISSUE);
 
 		return balance.toString();
-
-		} catch (ForeignBlockchainException e) {
-			throw ApiExceptionFactory.INSTANCE.createException(request, ApiError.FOREIGN_BLOCKCHAIN_NETWORK_ISSUE);
-		}
 	}
 
 	@POST

src/main/java/org/qortal/api/resource/CrossChainLitecoinResource.java

@@ -67,16 +67,11 @@ public class CrossChainLitecoinResource {
 		if (!litecoin.isValidDeterministicKey(key58))
 			throw ApiExceptionFactory.INSTANCE.createException(request, ApiError.INVALID_PRIVATE_KEY);
 
-		try {
+		Long balance = litecoin.getWalletBalance(key58);
-			Long balance = litecoin.getWalletBalanceFromTransactions(key58);
 		if (balance == null)
 			throw ApiExceptionFactory.INSTANCE.createException(request, ApiError.FOREIGN_BLOCKCHAIN_NETWORK_ISSUE);
 
 		return balance.toString();
-
-		} catch (ForeignBlockchainException e) {
-			throw ApiExceptionFactory.INSTANCE.createException(request, ApiError.FOREIGN_BLOCKCHAIN_NETWORK_ISSUE);
-		}
 	}
 
 	@POST

src/main/java/org/qortal/crosschain/Bitcoiny.java

@@ -336,16 +336,6 @@ public abstract class Bitcoiny implements ForeignBlockchain {
 		return balance.value;
 	}
 
-	public Long getWalletBalanceFromTransactions(String key58) throws ForeignBlockchainException {
-		long balance = 0;
-		Comparator<SimpleTransaction> oldestTimestampFirstComparator = Comparator.comparingInt(SimpleTransaction::getTimestamp);
-		List<SimpleTransaction> transactions = getWalletTransactions(key58).stream().sorted(oldestTimestampFirstComparator).collect(Collectors.toList());
-		for (SimpleTransaction transaction : transactions) {
-			balance += transaction.getTotalAmount();
-		}
-		return balance;
-	}
-
 	public List<SimpleTransaction> getWalletTransactions(String key58) throws ForeignBlockchainException {
 		Context.propagate(bitcoinjContext);