Submit and Sponsor Transactions

The Developer SDK can prepare transactions, but your app still needs to submit them. There are two models:

send directly through your own RPC path
sponsor submission through Swig’s paymaster route

Use swig.transactions.sponsor(...) when your server should hand the signed transaction to Swig’s sponsor path:

TypeScript

await swig.transactions.sponsor({
  transaction: signed.transaction,
  transactionEncoding: signed.transactionEncoding,
  network: signed.network,
});

from swig_developer_sdk import SponsorSignedTransactionArgs

await swig.transactions.sponsor(
    SponsorSignedTransactionArgs(
        transaction=signed.transaction,
        transaction_encoding=signed.transaction_encoding,
        network=signed.network,
    )
)

The client still signs first when authority signatures are required. Sponsoring does not replace client authority signing. Use it when:

your product wants gasless or paymaster-backed flows
your backend already owns the post-signing submission step
you want one server-owned path for ordered transaction submission

Transaction categories still matter

These categories tell you what can go straight to send or sponsor:

clientAuthorityTransactions / client_authority_transactions must be client-signed first
feePayerOnlyTransactions / fee_payer_only_transactions can go straight to your fee payer or sponsor path
operatorSignedTransactions / operator_signed_transactions are already operator-signed and just need final submission handling

Portal admin vs runtime usage

This page is about runtime submission. If you need to create or manage a paymaster in the dashboard, use the portal docs:

Start Here

Set Up Access

Build Wallet Flows

Add Recovery

Operate in Production

Workspace Admin

Submit and Sponsor Transactions

Transaction categories still matter

Portal admin vs runtime usage

​Sponsor submission

​When sponsor submission fits

​Transaction categories still matter

​Portal admin vs runtime usage

Sponsor submission

When sponsor submission fits

Transaction categories still matter

Portal admin vs runtime usage