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# SolanaExternalWalletSignerConfig

<Warning>
  **You are viewing docs for the previous version of the Wallets SDK.** We recommend upgrading to V1.
  See the [updated version of this page](/sdk-reference/wallets/typescript/type-aliases/SolanaExternalWalletSignerConfig) or the [V1 migration guide](/wallets/guides/migrate-to-v1).
</Warning>

> **SolanaExternalWalletSignerConfig** = `BaseExternalWalletSignerConfig` & `object`

Defined in: packages/common/base/dist/types/signers.d.ts:20

## Type Declaration

### onSignTransaction()?

> `optional` **onSignTransaction**: (`transaction`) => `Promise`\<`VersionedTransaction`>

#### Parameters

| Parameter     | Type                   |
| ------------- | ---------------------- |
| `transaction` | `VersionedTransaction` |

#### Returns

`Promise`\<`VersionedTransaction`>