> ## Documentation Index
> Fetch the complete documentation index at: https://docs.avok.xyz/llms.txt
> Use this file to discover all available pages before exploring further.

# Sponsor Solana sends

> Let users pay Solana fees in an SPL token, using your own Kora endpoint.

On Solana, a sponsored send lets the user pay the fee in an SPL token instead of native SOL. You
bring your own Kora endpoint. For the model, see [Sponsorship](/concepts/sponsorship).

## Configure Kora

Set a single `koraUrl` on the client config. Kora is both the fee payer and the submitter, so this
one endpoint is the Solana analogue of `bundlerUrl` and `paymasterUrl` together.

```ts theme={null}
const client = createAvokClient(
  {
    connection,
    koraUrl: "https://your-kora.example",
  },
  wallet,
);
```

Without `koraUrl`, Solana sends fall back to self-pay.

## Pass the fee token per send

A fee token is a per-send choice, expressed as the SPL mint address. Supply it when you build the
send; omit it, and the send is self-pay. When Kora is configured and the mint is supported, the fee
is charged in that token and native SOL is untouched.

<Warning>
  Solana has no `requireSponsorship` equivalent. A sponsored request that cannot reach Kora degrades
  **silently** to self-pay. If your product promises fee-in-token on Solana, verify `receipt.rail`
  after each send rather than relying on configuration.
</Warning>

## Confirm which rail ran

A sponsored Solana receipt has `rail: "sponsored"`, a real `signature`, and `status: "pending"`
until the network confirms it. A self-pay receipt has `status: "submitted"`. Neither means
confirmed. See [Receipts](/reference/receipts).

If Kora refuses the transaction, the send throws `KoraRejectedError`, naming the reason and code.
See [Errors](/reference/errors).