> For the complete documentation index, see [llms.txt](https://docs.zama.org/protocol/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.zama.org/protocol/sdk/api-references/react/useunshield.md).

# useUnshield

Mutation hook that unshields confidential tokens back to public ERC-20.

Mutation hook that unshields confidential tokens back to public ERC-20. Orchestrates the full two-step flow (unwrap + finalize) in one call.

## Import

```ts
import { useUnshield } from "@zama-fhe/react-sdk";
```

## Usage

{% tabs %}
{% tab title="component.tsx" %}

```tsx
import { useUnshield } from "@zama-fhe/react-sdk";

function UnshieldButton() {
  const { mutateAsync: unshield, isPending } = useUnshield("0xWrapper");

  async function handleUnshield() {
    await unshield({
      amount: 500n,
      onUnwrapSubmitted: (txHash) => console.log("Unwrap tx:", txHash),
      onFinalizing: () => console.log("Waiting for decryption proof..."),
      onFinalizeSubmitted: (txHash) => console.log("Finalized:", txHash),
    });
  }

  return (
    <button onClick={handleUnshield} disabled={isPending}>
      {isPending ? "Unshielding..." : "Unshield"}
    </button>
  );
}
```

{% endtab %}

{% tab title="config.ts" %}

```ts
// config.ts
import { createConfig as createZamaConfig } from "@zama-fhe/react-sdk/wagmi";
import { web } from "@zama-fhe/sdk/web";
import { sepolia } from "@zama-fhe/sdk/chains";
import type { FheChain } from "@zama-fhe/sdk/chains";
import { config as wagmiConfig } from "./wagmi";

const mySepolia = {
  ...sepolia,
  relayerUrl: "https://your-app.com/api/relayer/11155111",
} as const satisfies FheChain;

export const zamaConfig = createZamaConfig({
  chains: [mySepolia],
  wagmiConfig,
  relayers: { [mySepolia.id]: web() },
});

// In your app layout:
// <ZamaProvider config={zamaConfig}>
//   <App />
// </ZamaProvider>
```

{% endtab %}
{% endtabs %}

## Parameters

### address

`Address`

Address of the confidential wrapper contract. Passed positionally as the first argument.

```ts
const { mutateAsync: unshield } = useUnshield("0xWrapper");
```

***

## Mutation variables

Passed to `mutate` / `mutateAsync` at call time.

### amount

`bigint`

Number of confidential tokens to unshield.

```ts
await unshield({ amount: 500n });
```

### skipBalanceCheck

`boolean | undefined`

Skip confidential balance validation (e.g. for smart wallets that cannot produce EIP-712 signatures). Defaults to `false`.

### onUnwrapSubmitted

`((txHash: Hex) => void) | undefined`

Fires when the unwrap transaction is submitted on-chain.

### onFinalizing

`(() => void) | undefined`

Fires when the SDK begins waiting for the decryption proof.

### onFinalizeSubmitted

`((txHash: Hex) => void) | undefined`

Fires when the finalize transaction is submitted on-chain.

{% hint style="info" %}
Callbacks are safe — if one throws, the unshield still completes.
{% endhint %}

```ts
await unshield({
  amount: 500n,
  onUnwrapSubmitted: (txHash) => updateUI("Step 1 submitted"),
  onFinalizing: () => updateUI("Awaiting proof..."),
  onFinalizeSubmitted: (txHash) => updateUI("Complete"),
});
```

**Throws:**

* `InsufficientConfidentialBalanceError` -- if the confidential balance is less than `amount` (exposes `requested`, `available`, `token`)
* `BalanceCheckUnavailableError` -- if balance validation is required but decryption is not possible (no stored permits). Grant a permit first with `useGrantPermit`, or use `skipBalanceCheck: true`

## Return Type

```ts
import { type UnshieldParams } from "@zama-fhe/sdk/query";
```

`data` resolves to `{ txHash: Hex, receipt: TransactionReceipt }`.

Auto-invalidates the `confidentialBalance` cache on success.

## Related

* [useUnshieldAll](/protocol/sdk/api-references/react/useunshieldall.md) — unshield the entire confidential balance
* [useResumeUnshield](/protocol/sdk/api-references/react/useresumeunshield.md) — resume an interrupted unshield
* [useShield](/protocol/sdk/api-references/react/useshield.md) — reverse operation, shield public tokens
* [WrappedToken.unshield](/protocol/sdk/api-references/sdk/wrappedtoken.md#unshield) — imperative equivalent on the `WrappedToken` class


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