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chore: add
SorobanInvokeContractFunction example.
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examples/src/main/java/network/lightsail/SorobanInvokeContractFunction.java
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,111 @@ | ||
| package network.lightsail; | ||
|
|
||
| import java.nio.charset.StandardCharsets; | ||
| import java.util.List; | ||
| import org.stellar.sdk.KeyPair; | ||
| import org.stellar.sdk.Network; | ||
| import org.stellar.sdk.SorobanServer; | ||
| import org.stellar.sdk.Transaction; | ||
| import org.stellar.sdk.TransactionBuilder; | ||
| import org.stellar.sdk.TransactionBuilderAccount; | ||
| import org.stellar.sdk.exception.NetworkException; | ||
| import org.stellar.sdk.exception.PrepareTransactionException; | ||
| import org.stellar.sdk.operations.InvokeHostFunctionOperation; | ||
| import org.stellar.sdk.responses.sorobanrpc.GetTransactionResponse; | ||
| import org.stellar.sdk.responses.sorobanrpc.SendTransactionResponse; | ||
| import org.stellar.sdk.scval.Scv; | ||
| import org.stellar.sdk.xdr.SCVal; | ||
| import org.stellar.sdk.xdr.TransactionMeta; | ||
|
|
||
| public class SorobanInvokeContractFunction { | ||
| public static void main(String[] args) { | ||
| String secret = "SAAPYAPTTRZMCUZFPG3G66V4ZMHTK4TWA6NS7U4F7Z3IMUD52EK4DDEV"; | ||
| String rpcServerUrl = "https://soroban-testnet.stellar.org:443"; | ||
| Network network = Network.TESTNET; | ||
|
|
||
| KeyPair keyPair = KeyPair.fromSecretSeed(secret); | ||
| SorobanServer sorobanServer = new SorobanServer(rpcServerUrl); | ||
| TransactionBuilderAccount source = sorobanServer.getAccount(keyPair.getAccountId()); | ||
|
|
||
| // The invoke host function operation | ||
| // https://github.com/stellar/soroban-examples/tree/main/hello_world | ||
| String contractId = "CDZJVZWCY4NFGHCCZMX6QW5AK3ET5L3UUAYBVNDYOXDLQXW7PHXGYOBJ"; | ||
| String functionName = "hello"; | ||
| List<SCVal> parameters = | ||
| List.of(Scv.toString("World!")); // Scv is a helper class to create SCVal objects | ||
| InvokeHostFunctionOperation invokeHostFunctionOperation = | ||
| InvokeHostFunctionOperation.invokeContractFunctionOperationBuilder( | ||
| contractId, functionName, parameters) | ||
| .build(); | ||
|
|
||
| // Build the transaction | ||
| Transaction unpreparedTransaction = | ||
| new TransactionBuilder(source, network) | ||
| .setBaseFee(Transaction.MIN_BASE_FEE) | ||
| .addOperation(invokeHostFunctionOperation) | ||
| .setTimeout(300) | ||
| .build(); | ||
|
|
||
| // Prepare the transaction | ||
| Transaction transaction; | ||
| try { | ||
| transaction = sorobanServer.prepareTransaction(unpreparedTransaction); | ||
| } catch (PrepareTransactionException e) { | ||
| throw new RuntimeException("Prepare transaction failed", e); | ||
| } catch (NetworkException e) { | ||
| throw new RuntimeException("Network error", e); | ||
| } | ||
|
|
||
| // Sign the transaction | ||
| transaction.sign(keyPair); | ||
|
|
||
| // Send the transaction | ||
| SendTransactionResponse sendTransactionResponse; | ||
| try { | ||
| sendTransactionResponse = sorobanServer.sendTransaction(transaction); | ||
| } catch (NetworkException e) { | ||
| throw new RuntimeException("Send transaction failed", e); | ||
| } | ||
| if (!SendTransactionResponse.SendTransactionStatus.PENDING.equals( | ||
| sendTransactionResponse.getStatus())) { | ||
| throw new RuntimeException("Send transaction failed: " + sendTransactionResponse); | ||
| } | ||
|
|
||
| // Check the transaction status | ||
| GetTransactionResponse getTransactionResponse; | ||
| while (true) { | ||
| try { | ||
| getTransactionResponse = sorobanServer.getTransaction(sendTransactionResponse.getHash()); | ||
| } catch (NetworkException e) { | ||
| throw new RuntimeException("Get transaction failed", e); | ||
| } | ||
|
|
||
| if (!GetTransactionResponse.GetTransactionStatus.NOT_FOUND.equals( | ||
| getTransactionResponse.getStatus())) { | ||
| break; | ||
| } | ||
| // Wait for 3 seconds before checking the transaction status again | ||
| try { | ||
| Thread.sleep(3000); | ||
| } catch (InterruptedException e) { | ||
| e.printStackTrace(); | ||
| } | ||
| } | ||
|
|
||
| if (GetTransactionResponse.GetTransactionStatus.SUCCESS.equals( | ||
| getTransactionResponse.getStatus())) { | ||
| System.out.println("Transaction succeeded: " + getTransactionResponse); | ||
| // parse the function return value | ||
| TransactionMeta transactionMeta = getTransactionResponse.parseResultMetaXdr(); | ||
| SCVal rawReturnValue = transactionMeta.getV3().getSorobanMeta().getReturnValue(); | ||
| System.out.println("Raw return value: " + rawReturnValue); | ||
| List<SCVal> vec = Scv.fromVec(rawReturnValue).stream().toList(); | ||
| String returnValue0 = new String(Scv.fromString(vec.get(0)), StandardCharsets.UTF_8); | ||
| String returnValue1 = new String(Scv.fromString(vec.get(1)), StandardCharsets.UTF_8); | ||
| System.out.println("Return value 0: " + returnValue0); | ||
| System.out.println("Return value 1: " + returnValue1); | ||
| } else { | ||
| System.out.println("Transaction failed: " + getTransactionResponse); | ||
| } | ||
| } | ||
| } |