Send SVM Transactions

Overview

DynamicSvmWalletClient::sendTransaction signs the serialized message of a Solana transaction with the MPC ceremony and broadcasts it via Solana JSON-RPC in one call. Returns the transaction signature (base58) — the standard Solana tx ID. sendTransaction is the recommended path for most apps. Reach for signTransaction only if you need to assemble the wire envelope yourself.

Prerequisites

Created an SVM wallet
A Solana JSON-RPC endpoint (mainnet, devnet, or your own validator)

Sign + Broadcast in One Call

import xyz.dynamic.waas.svm.opts.SendTransactionOpts;

byte[] messageBytes = /* bytes(transaction.message) — see Sign SVM Transactions */;

String txSig = client.sendTransaction(SendTransactionOpts.builder()
    .messageBytes(messageBytes)
    .walletProperties(walletProperties)
    .externalServerKeyShares(externalServerKeyShares)
    .rpcUrl("https://api.devnet.solana.com")
    .sponsor(false)        // true to take the sponsorship path
    .build()
).join();

System.out.println("Submitted tx: " + txSig);
System.out.println("Explorer: https://explorer.solana.com/tx/" + txSig + "?cluster=devnet");

A fresh JSON-RPC client is constructed per call. For high-throughput scenarios, compose signTransaction with your own pooled RPC client.

Gas Sponsorship

Setting .sponsor(true) routes the broadcast through Dynamic’s sponsor path — Dynamic pays the SOL transaction fee and you don’t need to fund the wallet’s lamports balance. Gas sponsorship must be enabled for your environment in the Dynamic dashboard.

String sponsoredTxSig = client.sendTransaction(SendTransactionOpts.builder()
    .messageBytes(messageBytes)
    .walletProperties(walletProperties)
    .externalServerKeyShares(externalServerKeyShares)
    .rpcUrl("https://api.mainnet-beta.solana.com")
    .sponsor(true)
    .build()
).join();

See Sponsor Transactions for the lower-level building block (sponsorTransaction returns the sponsor-signed wire envelope without broadcasting).

Building the Message

Use sava-core (or any other JVM Solana SDK) to assemble the unsigned transaction, fetch the latest blockhash, and serialize just the message portion:

import software.sava.core.tx.Transaction;
import software.sava.rpc.json.http.client.SolanaRpcClient;

SolanaRpcClient rpc = SolanaRpcClient.createClient(java.net.URI.create("https://api.devnet.solana.com"));
String blockhash    = rpc.getLatestBlockhash().join().blockhash();

Transaction tx = Transaction.createTx(
    walletPubkey,
    List.of(/* SystemProgram.transfer(...), etc. */),
    blockhash
);
byte[] messageBytes = tx.serializedMessage();

Error Handling

import java.util.concurrent.CompletionException;
import xyz.dynamic.waas.core.exceptions.DynamicSdkException;

try {
    String txSig = client.sendTransaction(opts).join();
    log.info("Submitted: {}", txSig);
} catch (CompletionException ce) {
    if (ce.getCause() instanceof DynamicSdkException dse) {
        log.error("Send failed: {}", dse.getMessage(), dse);
    } else {
        throw ce;
    }
}

If the broadcast itself fails (blockhash not found, sponsor pool exhausted, etc.), the error message surfaces verbatim — refresh the blockhash and retry.

Next Steps

Sign transactions — get the raw signature without broadcasting
Sponsor transactions — lower-level sponsor primitive
Sign messages
Delegated access

Getting Started

EVM Guides

SVM Guides

Lifecycle

Send SVM Transactions

Overview

Prerequisites

Sign + Broadcast in One Call

Gas Sponsorship

Building the Message

Error Handling

Next Steps

​Overview

​Prerequisites

​Sign + Broadcast in One Call

​Gas Sponsorship

​Building the Message

​Error Handling

​Next Steps

Overview

Prerequisites

Sign + Broadcast in One Call

Gas Sponsorship

Building the Message

Error Handling

Next Steps