Questions tagged [java-sdk]

For questions specifically regarding the Java Software Development Kit (SDK) for Stellar client applications.

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Problems with Java SDK data structures and classes

I have been using the Java SDK to build an anchor implementation and the SDK is full of incomprehensible data structures that impede understanding. For example, to find out if a PathPayment worked the ...
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1answer
26 views

How to get result of successfully submitted transaction?

I am using the Stellar Java SDK to submit a PathPaymentStrictReceiveOperation transaction. I get back a SubmitTransactionResponse object. I would like to get the results of the (successful) ...
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1answer
29 views

Send Transaction XDR To Other Account Using Stellar

Situation: I am trying to implement the Stellar 2-party multisignature escrow account with time lock & recovery Smart Contract example using the Java SDK. In transaction 3 (unlock transaction), ...
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0answers
10 views

Document did not contain stellar_address

I'm a Stellar beginner trying to validate an account I just created as follows: val server = FederationServer("https://horizon-testnet.stellar.org") val keyPair = KeyPair.random for { ...
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1answer
20 views

Unable to create account using Java SDK

I have been successfully creating accounts for months before the reset but I am now running into a problem and not clear what the actual problem is. I am executing the following code: final KeyPair ...
1
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1answer
92 views

`tx_bad_auth` when submit transaction to TestNet

I submit a transaction to the TestNet by using the official horizon API (https://horizon-testnet.stellar.org/), and it returns tx_bad_auth. This is my code: Server server = new Server("...
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1answer
61 views

How can I view transactions within a specific date range?

Is there any solution for filtering transactions by date? Scenario: I wanna fetch transactions for a specific account in a specific range of date like 2020/04/04 to 2020/05/04 I looked for it a lot in ...
1
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1answer
25 views

Receiving BaseEncodingException when signing transaction using TestNet : Invalid Input Length

Sending from Account A to B is not working in my implementation. The docs provided by stellar for Java are straight forward but I have been receiving a BaseEncodingException when trying to sign the ...
1
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1answer
38 views

SEP 0024 Question: Where do the /info response fields referenced below come from?

I'm trying to develop an anchor server and going through the SEP0024 documentation. The documentation says "Provide a full-featured implementation of /info". Where does one find or create the fields ...
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1answer
28 views

How to use manage data operation on Java SDK

I was not able to find any tutorial or an example on manage data operation of Java sdk. I tried to build a sample using the Java API documentation. But it's too complicated. If anyone can show me how ...
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1answer
28 views

My transaction fails with paymentResult: [paymentLineFull]

I'm using the Stellar Java SDK to perform a Transaction with a PaymentOperation and I run into the following transaction response: (Converted from XDR). I don't know what this error means and how I'd ...
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1answer
30 views

Network.usePublicNetwork(); showing syntax error

I have just migrated to AndroidX (which may or may not be related to this issue). However, Network.usePublicNetwork(); is now showing a syntax error: Below are my imports: import org.stellar.sdk....
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1answer
36 views

How can I send lumens over local docker quickstart image using accounts made on local image and not the testnet

I am following the stellar walkthrough for creating two accounts, a source and a destination using the testnet. However, I would like to use my local docker quickstart image to facilitate the ...
1
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1answer
41 views

Cannot send hashed data through ManageDataOperation

I am trying to send a data hashed using SCryptUtil provided by com.lambdaworks.crypto.SCryptUtil, convert it into array of bytes and send it to the stellar network using ManageDataOperation.Builder ...
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1answer
134 views

Retrieve transaction memo text with Java API

I need to retrieve some transactions from a specific account and then read the memo. I've tried a couple of different methods with no success. My first attempt was as below, but I get odd looking memo ...
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1answer
798 views

“No converter found for return value of type: class org.stellar.sdk.requests.TransactionsRequestBuilder” when getting transaction history

This is my code for transaction history: @RequestMapping(value = EmpRestURIConstants.TRANS_HIS, method = RequestMethod.POST) public @ResponseBody TransactionsRequestBuilder transactionHistory(@...
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2answers
110 views

Exception while send Transaction using Java stellar SDK “TimeBounds has to be set or you must call setTimeout(TIMEOUT_INFINITE)”

I am getting the following Exception while performing send transaction using the Java Stellar SDK. This is my send transaction code: import org.stellar.sdk.AssetTypeNative; import org.stellar.sdk....
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2answers
32 views

How to set managed data on an account

I am new to stellar. I want to add a data to my stellar account as a key value pair. As in "Name"(Key) - "John"(Value). How can I achieve this? Pointing me to a sample code would be really ...
2
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1answer
91 views

Problem of implementation of Path Payment in a Wallet?

I made a Java implementation of a Path Payment. I created 3 accounts. For example: the first plays the role of issuer. He issued 2 assets (USD, EUR) The second has USD The third, EUR. I created an ...
4
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1answer
92 views

Stellar Java Sdk key validation?

In JavaScript SDK we have method isValidEd25519PublicKey for Stellar address validation. But in Java SDK there is no such method. How can I validate Stellar address with Java SDK?
3
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1answer
47 views

Extra 0 byte at end of MemoText String

I extracted a TransactionEnvelope XDR several months ago for testing. It parses fine in the lab and the SDKs. I've tried parsing it by hand and there's something I don't understand. After the ...
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3answers
64 views

Payment operation listener firing off multiple times for single operation

I have implemented a payment listener in my mainActivity. It is working, except that the majority of the time it is firing off multiple times (usually 2 or 3 times) for a single payment receipt. ...
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1answer
45 views

Multi-sign transaction is not working

I am creating a multi-sign transaction. When I am submitting the transaction to Stellar, response.isSuccess() returns false. Could anyone tell me where I am going wrong? link https://www.stellar.org/...
1
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1answer
56 views

Transaction Stream parameter and method not recognized

I'm trying to set up a transaction listening stream. I have taken the Java snippet directly from the docs. Below is the part that is giving me an issue. Server server = new Server("https://horizon-...
2
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1answer
75 views

Subscribing to incoming transaction does not work

paymentsRequest.stream(new EventListener<OperationResponse>() { @Override public void onEvent(OperationResponse payment) { System.out.println("TEST TEST TEST"); This ...
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2answers
88 views

Convert transaction XDR to object?

Given a base64 & XDR encoded transaction, how can I convert this into a transaction object? I already saw this answer, but couldn't find the Transaction.fromEnvelopeXdr(...) method.
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1answer
43 views

How to access AssetResponse properties of a newly created asset? C# or Java

I'm using the C# SDK. For Example, a new Asset is created. _stellarAsset = Asset.CreateNonNativeAsset("credit_alphanum4", _assetIssuer, _assetCode); This is in a method which returns the asset ...
4
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1answer
50 views

ManageOfferOperation - Not taking the price I set

I'm using the Java SDK. With the ManageOfferOperation class passing an amount and price but it's not taking the price I set. Instead it always sets a different price, which I believe is the market ...
3
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1answer
71 views

paymentsRequest.stream

I'm using the android studio and I'm having trouble with paymantsRequest.stream. it's saying it can't connect to server sent event. (cannot access com.here.oksse.serversentevent) here is the code ...
4
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2answers
87 views

Retrieving operations for a transaction unexpectedly slow?

I am trying to retrieve the operations for the transactions of a given ledger. First retrieve the transactions: List<TransactionResponse> transactionResponses = this.server.horizonServer() ...
4
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2answers
354 views

How to Build transaction XDR before sign it

I want to build a transaction and convert that as XDR before sign that transaction. As i found we need to build adn sign the transaction before convert that as XDR specially in java and GO SDK. Is ...
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1answer
58 views

get Transaction object from xdr base64 string

I have a base64 xdr string of a transaction. How can I convert that to a transaction object, so I can sign it e.g. transaction.sign(...)
3
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1answer
117 views

Random crash upon calling KeyPair.random() on android

I'm trying to use the stellar sdk in an android app. So I downloaded the stellar sdk and generate it's jar and include it in as a external jar in my android app. To get it working I also had to add ...
5
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3answers
158 views

TimeBounds won't execute?

I struggle using the timebounds option for an operation. Use case : I want a transaction to be executed at a precise time, not before, not after. I'm doing my tests on the test network. The ...
6
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1answer
91 views

minTime must be >= maxTime ? Java SDK

I'm trying to add a simple time bounds with the Java SDK to settle a transaction happening at a certain time. Code used : Instant unlockDate = Instant.now().plusSeconds(60 * 2); TimeBounds ...
1
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2answers
332 views

Trading error 400, what's the problem?

I receive an HTTP 400 error from the /transactions endpoint on public Horizon when running this code: try { Network.usePublicNetwork(); Server server = new Server("https://horizon.stellar.org"...
4
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4answers
348 views

How does Java parse XDR information?

I need to get the transaction records. This information seems to be in XDR. How can I parse it in Java?
1
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1answer
48 views

Compliance Server Request

Still new on stellar but am having a challenge when using the default compliance server for Auth_request. Keep on getting the below error. { "code": "invalid_parameter", "message": "Invalid ...
2
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2answers
106 views

Java SDK: Transaction object from envelope

In Javascript SDK, transaction can be built, signed and then be converted to envelope xdr/string format. This is very useful for multi sig operations since we can retrieve the transaction object from ...
2
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1answer
284 views

How to setup time bounds for an escrow account?

I am trying to create 2-Party Multisignature Escrow Account with Time Lock & Recovery as in this ref:https://www.stellar.org/developers/guides/walkthroughs/stellar-smart-contracts.html Now, I ...
2
votes
1answer
108 views

Python vs Java(script) for stellar apps. Is it worth learning a new language?

I am starting to get into programming apps for crypto, and I would like to start on the Stellar network. My programming background lies mainly in C and Python, and I am a reasonably competent self ...
3
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1answer
107 views

Stream stop get new data when finishing fetch all data and new payment was created

I using java-stellar-sdk version 0.2.0 from this: https://github.com/stellar/java-stellar-sdk/releases I did as tutorial example: @Override protected void onCreate(Bundle savedInstanceState) { ...
2
votes
1answer
285 views

How to get Transaction amount from API?

I want to display all transactions of given users. Using the Java API, I presume I would do: server.transactions().forAccount(destination2).execute(); I would then page through the result. Each item ...
5
votes
3answers
525 views

How to sign the XDR transaction envelop and and post it through java sdk?

I received the XDR envelope of a transaction. I need to sign it and submit using Java SDK. I am able to decode the XDR, but need help on how to sign and submit.
4
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1answer
1k views

Convert XDR to text

I want to convert the XDR fromat of the transaction to text using JS or java SDK in stellar.Or if there are any methods outside stellar also fine.
4
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1answer
99 views

java sdk leaking threads; my fault or bug?

In the simplest case, when I have a KeyPair key for an account that doesn't yet exist, and call // private Server mServer; // declared and intialized elsewhere mServer.accounts().account(key); it ...
2
votes
2answers
166 views

Simple Transaction Issue

I am working on a small and very basic project, essentially doing a POC involving stellar transactions. I am a newbie with stellar. I have two clients running the same code, and a 'banker' who ...
2
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1answer
76 views

Issue with Submit Transaction

Am using Java SDK and Horizon Testnet. Issue is when i submit a transaction using server.submitTransaction method i get following exception, please let me know if you need any more information javax....
6
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1answer
339 views

How to sign TransactionEnvelope and post TransactionEnvelope to Horizon Server using Stellar Java SDK

I am implementing Stellar Smart Contract where in account has 2 signers. Goal is second signer can withdraw funds after certain date and if not withdrawn first signer can recover / transfer the funds. ...
1
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1answer
73 views

best way to store and retrieve an Asset

Does anybody know best way to store an Asset descriptor once it has been created with Asset.createNonNativeAsset(currencyName, issuingKeys);? How do we store it and retrieve the reference when we need ...