# Solana Wallet Standard (/connectors/solana-wallet-standard)



`@usebutr/svm` discovers Solana wallets (Phantom, Solflare, Backpack, Magic Eden,
…) through the [Wallet Standard](https://github.com/wallet-standard/wallet-standard).

## Discovery [#discovery]

`autoDiscovery()` from `@usebutr/wallets` handles SVM discovery automatically.
For an SVM-only setup, wire it directly with `createWalletSource`:

```ts
import { createWalletSource } from "@usebutr/core";
import { discoverSvmAdapters } from "@usebutr/svm";
import { WalletManagerProvider } from "@usebutr/react";

const discovery = createWalletSource(discoverSvmAdapters);

<WalletManagerProvider discovery={discovery}>
  {children}
</WalletManagerProvider>
```

<Callout type="info">
  `@usebutr/svm` lazily imports `@wallet-standard/app` (an optional peer dependency). That
  asynchronous warmup is one reason restored SVM wallets can land in `pendingIds` for a moment — see
  [hydration](/concepts/hydration).
</Callout>

## Capabilities [#capabilities]

Resolved from the wallet's advertised Wallet Standard features via
`resolveWalletStandardCapabilities`:

* `signMessage` — true only if the wallet advertises `solana:signMessage`.
* `sendTransaction` — true only if it advertises
  `solana:signAndSendTransaction`.
* `subscribe` — true via the Standard `change` event.
* `switchChain` — local state + per-call `chain` input when more than one chain
  is advertised.
* `requestAccounts` — generally a no-op: Standard wallets expose all accounts
  at once, there is no picker.

Always branch on [capabilities](/concepts/capabilities).

## Working with the signer [#working-with-the-signer]

`getSigner()` on an SVM adapter returns the `WalletStandardWallet`. You call
its features directly (or bridge into a Solana library):

```ts
const walletStd = (await wallet.connector.getSigner()) as WalletStandardWallet;
const feature = walletStd.features["solana:signMessage"];
const account = walletStd.accounts[0];
const [output] = await feature.signMessage({ account, message });
```

See [Solana integrations](/integrations/solana-web3js) for the full
build-and-send flow with `@solana/web3.js`, `@solana/kit`, and
`@solana/wallet-adapter-react`.

## Chains [#chains]

`SVM_CHAINS_LIST` / `SVM_CHAINS` ship Solana mainnet, testnet, and devnet.
`slugify` and `resolveWalletStandardCapabilities` are exported for adapter
authors.

<Callout type="info">
  **Source:** `packages/svm/src`. Used by all `apps/demo-with-solana-*` demos and (via
  `@usebutr/wallets`) `apps/demo-vite`.
</Callout>