Send a transaction

Send Sui transactions through Phantom by constructing transaction parameters and requesting a signature.

Phantom’s Sui dapp support will be deprecated on September 24, 2026. Do not start new Sui integrations with Phantom. Existing integrations can continue during the transition and should prepare for the deprecation.

Once a dapp is connected to Phantom, it can request user permission to send transactions on their behalf. To initiate a transaction, ensure you have the necessary parameters. For details on constructing transactions, refer to Sui developer documentation.

const transactionParams = {
        transaction: await tx.toJSON(), // Replace with actual transaction
        address: address.toString(), // Sender address
        networkID: SupportedSuiChainIds.SuiMainnet, // or your network ID
};

To prompt Phantom to send a transaction to the network, refer to the following code snippet:

try {
    const signature = await provider.signTransaction(params);
    return signature;
} catch (error) {
    throw new Error(error instanceof Error ? error.message : 'Failed to sign transaction');
}