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

# useParaCosmjsProtoSigner

> Hook for retrieving a CosmJS Proto signer for a Para wallet

export const MethodDocs = ({name, description, parameters = [], returns, deprecated = false, since = null, async = false, static: isStatic = false, tag = null, defaultExpanded = false, preventCollapse = false, id = 'method'}) => {
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      params: '',
      closeParen: ''
    };
  };
  const methodParts = parseMethodName(name);
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    setIsCopied(true);
    setTimeout(() => setIsCopied(false), 2000);
  };
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                    static
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              <code className="text-lg font-mono font-semibold text-gray-900">
                <span>{methodParts.name}</span>
                <span className="text-gray-500 font-normal">{methodParts.openParen}</span>
                <span className="text-blue-600 font-normal">{methodParts.params}</span>
                <span className="text-gray-500 font-normal">{methodParts.closeParen}</span>
              </code>

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                  ⚠ Deprecated
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        {parameters.length > 0 && <div className="pt-6">
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              <h3 className="text-sm font-semibold text-gray-700 uppercase tracking-wider m-0">
                Parameters
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            </div>
            <div>
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                    <code className="font-mono text-sm font-medium text-gray-900">
                      {param.name}
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                    <span className="text-sm text-gray-500">:</span>
                    {param.typeLink ? <a href={param.typeLink} className="no-underline">
                        <code className="font-mono text-sm text-blue-600 bg-transparent px-1 py-0.5 rounded-md cursor-pointer transition-all duration-200 hover:bg-gray-100 hover:text-blue-700">
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              Returns
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export const Link = ({href, label, newTab = false}) => {
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      {label}
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    </a>;
};

The `useParaCosmjsProtoSigner` hook returns a CosmJS `OfflineDirectSigner` for the user's Cosmos wallet. It supports both embedded Para wallets and external wallets.

If the user has multiple Cosmos wallets, pass `address` or `walletId` to select one. When omitted, the active wallet is used automatically.

<Note>`@getpara/react-sdk` includes `@getpara/cosmjs-v0-integration`. Install CosmJS packages such as `@cosmjs/stargate` when your app creates clients or imports CosmJS helpers directly.</Note>

<Tip>Use the companion mutation hook [useParaCosmjsSignAndBroadcast](/v3/react/guides/hooks/use-para-cosmjs-sign-and-broadcast) to sign and broadcast transactions.</Tip>

## Import

```tsx theme={null}
import { useParaCosmjsProtoSigner } from "@getpara/react-sdk";
```

## Usage

```tsx theme={null}
import { useParaCosmjsProtoSigner } from "@getpara/react-sdk";
import { SigningStargateClient } from "@cosmjs/stargate";

function SignDirect() {
  const { protoSigner, isLoading } = useParaCosmjsProtoSigner();

  const handleSign = async () => {
    if (!protoSigner) return;

    const signDoc = {
      bodyBytes: new TextEncoder().encode(
        JSON.stringify({ messages: [], memo: "Hello" })
      ),
      authInfoBytes: new Uint8Array(0),
      chainId: "",
      accountNumber: BigInt(0),
    };

    const result = await protoSigner.signDirect(protoSigner.address, signDoc);
    console.log("Signature:", result.signature.signature);
  };

  if (isLoading) return <p>Loading...</p>;

  return (
    <div>
      <p>Address: {protoSigner?.address}</p>
      <button onClick={handleSign}>Sign Message</button>
    </div>
  );
}
```

<MethodDocs
  defaultExpanded={true}
  preventCollapse={true}
  name="useParaCosmjsProtoSigner()"
  description="Provides a CosmJS Proto signer for signing with Para Cosmos wallets."
  parameters={[
{ name: "prefix", type: "string", optional: true, description: "Bech32 prefix for Cosmos addresses." },
{ name: "walletId", type: "string", optional: true, description: "ID of the Cosmos wallet to use (defaults to the selected one)." },
{ name: "messageSigningTimeoutMs", type: "number", optional: true, description: "Timeout for signing operations in milliseconds." }
]}
  returns={{ type: "UseQueryResult<OfflineDirectSigner | null> & { protoSigner }", description: "Extends UseQueryResult with a named protoSigner alias for data. Includes isLoading, isError, error, isSuccess, refetch, etc." }}
/>