> ## 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.

# useParaCosmjsAminoSigner

> Hook for retrieving a CosmJS Amino 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'}) => {
  const [isExpanded, setIsExpanded] = useState(defaultExpanded || preventCollapse);
  const [isHovered, setIsHovered] = useState(false);
  const [isCopied, setIsCopied] = useState(false);
  const [hoveredParam, setHoveredParam] = useState(null);
  const [hoveredReturn, setHoveredReturn] = useState(false);
  const parseMethodName = fullName => {
    const match = fullName.match(/^([^(]+)(\()([^)]*)(\))$/);
    if (match) {
      return {
        name: match[1],
        openParen: match[2],
        params: match[3],
        closeParen: match[4]
      };
    }
    return {
      name: fullName,
      openParen: '',
      params: '',
      closeParen: ''
    };
  };
  const methodParts = parseMethodName(name);
  const handleCopy = e => {
    e.stopPropagation();
    navigator.clipboard.writeText(name);
    setIsCopied(true);
    setTimeout(() => setIsCopied(false), 2000);
  };
  return <div className={`not-prose rounded-2xl border border-gray-200 overflow-hidden transition-colors duration-200 mb-6 ${isHovered && !preventCollapse ? 'bg-gray-50' : 'bg-white'}`} onMouseEnter={() => setIsHovered(true)} onMouseLeave={() => setIsHovered(false)}>
      <button onClick={() => !preventCollapse && setIsExpanded(!isExpanded)} className={`w-full bg-transparent p-6 border-none text-left ${preventCollapse ? 'cursor-default' : 'cursor-pointer'}`}>
        <div className="flex items-start justify-between gap-4">
          <div className="flex-1 flex flex-col gap-2">
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                    async
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                {isStatic && <span className="px-1.5 py-0.5 text-[0.625rem] font-medium bg-violet-200 text-violet-900 rounded-lg">
                    static
                  </span>}
                {tag && <span className="px-1.5 py-0.5 text-[0.625rem] font-medium bg-teal-200 text-teal-800 rounded-lg">
                    {tag}
                  </span>}
              </div>
              
              <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>
              
              {deprecated && <span className="px-1.5 py-0.5 text-[0.625rem] font-medium bg-red-100 text-red-800 rounded-lg flex items-center gap-0.5">
                  ⚠ Deprecated
                </span>}
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                  Since v{since}
                </span>}
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            <p className="text-sm text-gray-600 leading-6 m-0">
              {description}
            </p>
          </div>
          
          <div className="flex items-center gap-2 flex-shrink-0">
            <button onClick={handleCopy} className="p-2 bg-transparent border-none rounded-md cursor-pointer transition-colors duration-200 text-gray-500 hover:bg-gray-100" title="Copy method signature">
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                    <polyline points="6 9 12 15 18 9"></polyline>
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        </div>
      </button>

      <div className={`overflow-hidden transition-all duration-300 ease-in-out px-6 border-t border-gray-200 ${isExpanded ? 'max-h-[2000px] opacity-100 pb-6' : 'max-h-0 opacity-0 pb-0'}`}>
        {parameters.length > 0 && <div className="pt-6">
            <div className="flex items-center gap-2 mb-3">
              <h3 className="text-sm font-semibold text-gray-700 uppercase tracking-wider m-0">
                Parameters
              </h3>
              <span className="text-xs text-gray-500">({parameters.length})</span>
            </div>
            <div>
              {parameters.map((param, index) => <div key={index} className={`pl-4 border-l-2 transition-colors duration-200 ${hoveredParam === index ? 'border-gray-300' : 'border-gray-200'} ${index < parameters.length - 1 ? 'mb-3' : ''}`} onMouseEnter={() => setHoveredParam(index)} onMouseLeave={() => setHoveredParam(null)}>
                  <div className="flex items-baseline gap-2 mb-1 flex-wrap">
                    <code className="font-mono text-sm font-medium text-gray-900">
                      {param.name}
                    </code>
                    <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">
                          {param.type}
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                      </a> : <code className="font-mono text-sm text-blue-600 bg-transparent px-1 py-0.5 rounded-md">
                        {param.type}
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                    {param.required && <span className="px-1.5 py-0.5 text-[0.625rem] font-medium bg-yellow-100 text-yellow-800 rounded-lg">
                        Required
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                        Optional
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                      {param.description}
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              Returns
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};

export const Card = ({imgUrl, title, description, href, horizontal = false, newTab = false}) => {
  const [isHovered, setIsHovered] = useState(false);
  const handleClick = e => {
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      window.open(href, '_blank', 'noopener,noreferrer');
    } else {
      window.location.href = href;
    }
  };
  return <div className={`not-prose relative my-2 p-[1px] rounded-xl transition-all duration-300 ${isHovered ? 'bg-gradient-to-r from-[#FF4E00] to-[#874AE3]' : 'bg-gray-200'}`} onMouseEnter={() => setIsHovered(true)} onMouseLeave={() => setIsHovered(false)}>
      <a href={href} onClick={handleClick} className={`not-prose flex ${horizontal ? 'flex-row' : 'flex-col'} font-normal h-full bg-white overflow-hidden w-full cursor-pointer rounded-[11px] no-underline`}>
        {imgUrl && <div className={`relative overflow-hidden flex-shrink-0 ${horizontal ? 'w-[30%] rounded-l-[11px]' : 'w-full'}`} onClick={e => e.stopPropagation()}>
            <img src={imgUrl} alt={title} className="w-full h-full object-cover pointer-events-none select-none" draggable="false" />
            <div className="absolute inset-0 pointer-events-none" />
          </div>}
        <div className={`flex-grow px-6 py-5 ${horizontal ? 'w-[70%]' : 'w-full'} flex flex-col ${horizontal && imgUrl ? 'justify-center' : 'justify-start'}`}>
          {title && <h2 className="font-semibold text-base text-gray-800 m-0">{title}</h2>}
          {description && <div className={`font-normal text-gray-500 re leading-6 ${horizontal || !imgUrl ? 'mt-0' : 'mt-1'}`}>
              <p className="m-0 text-xs">{description}</p>
            </div>}
        </div>
      </a>
    </div>;
};

export const Link = ({href, label, newTab = false}) => {
  const [isHovered, setIsHovered] = useState(false);
  return <a href={href} target={newTab ? '_blank' : '_self'} rel={newTab ? 'noopener noreferrer' : undefined} className="not-prose inline-block relative text-black font-semibold cursor-pointer border-b-0 no-underline" onMouseEnter={() => setIsHovered(true)} onMouseLeave={() => setIsHovered(false)}>
      {label}
      <span className={`absolute left-0 bottom-0 w-full rounded-sm bg-gradient-to-r from-orange-600 to-purple-600 transition-all duration-300 ${isHovered ? 'h-0.5' : 'h-px'}`} />
    </a>;
};

The `useParaCosmjsAminoSigner` hook returns a CosmJS `OfflineAminoSigner` 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>Requires `@getpara/cosmjs-v0-integration` as a peer dependency.</Note>

## Import

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

## Usage

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

function SignAmino() {
  const { aminoSigner, isLoading } = useParaCosmjsAminoSigner();

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

    const signDoc = {
      chain_id: "cosmoshub-4",
      account_number: "0",
      sequence: "0",
      fee: { amount: [], gas: "200000" },
      msgs: [],
      memo: "Hello",
    };

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

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

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

<MethodDocs
  defaultExpanded={true}
  preventCollapse={true}
  name="useParaCosmjsAminoSigner()"
  description="Provides a CosmJS Amino 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<OfflineAminoSigner | null> & { aminoSigner }", description: "Extends UseQueryResult with a named aminoSigner alias for data. Includes isLoading, isError, error, isSuccess, refetch, etc." }}
/>