Questions tagged [java-sdk]

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

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1answer
36 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 ...
1
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1answer
43 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 ...
1
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1answer
30 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(@...
1
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2answers
39 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....
1
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2answers
26 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
50 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
52 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
32 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 ...
1
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3answers
43 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. ...
0
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1answer
32 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
41 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
49 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 ...
1
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2answers
56 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.
1
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1answer
35 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
votes
1answer
38 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
votes
1answer
48 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
60 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
212 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 ...
1
vote
1answer
44 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
73 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 ...
4
votes
3answers
139 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
votes
1answer
72 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
vote
2answers
164 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
146 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
vote
1answer
42 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
votes
2answers
89 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
votes
1answer
210 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
93 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
votes
1answer
86 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
187 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
271 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
votes
1answer
642 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
votes
1answer
69 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
142 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
votes
1answer
70 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
votes
1answer
257 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
vote
1answer
66 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 ...
1
vote
1answer
2k views

Multiple dex files define Lokio/AsyncTimeout$Watchdog;

After adding Stellar-SDK jar file and syncing Gradle, I did a clean and rebuild of my project and got this error. It seems that same class was used by another jar that has been added as dependency in ...
1
vote
1answer
81 views

How to get wallet id of an order?

I want to block some dumpers of my coin. Is there any Java code which I can use to get the wallet id of the low offers? For example if someone is buying less then 0.1 I want to get that offer and the ...
2
votes
1answer
36 views

Is there anyway to get the amount of asset which you sent?

as an ashore is there anyway to get the amount of the asset which you sent to the other wallets? like the the addition operation .
2
votes
1answer
75 views

How can i can freeze credit held by another account in Stellar SDK?

I read the guide from stellar.org but still couldn't find a solution. This is the guide: https://www.stellar.org/developers/guides/issuing-assets.html https://www.stellar.org/developers/guides/...
2
votes
1answer
88 views

Error while fetching account details from key pair [Java-stellar-sdk]

While fetching details of account using private SEED on stellar test net I am getting the below error: Error response from the server. at org.stellar.sdk.requests.ResponseHandler.handleResponse(...
4
votes
1answer
85 views

Monitoring if offers are filled

I read the guide about watching for incoming payments, but trades on the distributed exchange don't show up as payments (this makes sense). So, I've been looking through the available RequestBuilder ...
5
votes
2answers
336 views

How do you cancel all open trades for a Stellar account?

I'm looking at the Java docs and I can't find any way to delete every order for an account. Is there an easy way to cancel/remove all open trades/offers?
6
votes
1answer
167 views

How to listen to a third party account for stellar transactions from now?

I used paymentRequest.stream to start listen to events for a third party account. But it gets all events from the beginning if I don't provide a paging token. As it is a third party account, my ...
2
votes
1answer
278 views

Using Java api, how to find out the memo attached to a payment operation?

I can use the following code from example to receive payment event from public horizon. But the pos variable doesn't have memo information. Where should I get the memo from a certain paymente ...
2
votes
1answer
61 views

How to parse current offers with the Java SDK

Sorry for another illiterate question, but how the heck do you parse the https://horizon-testnet.stellar.org/accounts/ACCOUNT_PUBLIC_ID/offers page? There is almost no documentation on this. I have ...
4
votes
2answers
167 views

How to use the ManageOfferOperation with Assets in the Java SDK?

Right now I'm playing around with the test server Server server = new Server("https://horizon-testnet.stellar.org"); The Stellar getting started guides are very well written, but definitely ...