> ## Documentation Index
> Fetch the complete documentation index at: https://injectivelabs-docs-ai-sdk.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# 链下（任意）数据

本页面将提供如何根据 Cosmos 的 [ADR-036](https://docs.cosmos.network/main/build/architecture/adr-036-arbitrary-signature) 规范签名和验证任意数据的示例。

<Callout icon="info" color="#07C1FF" iconType="regular">
  你可以使用 `@injectivelabs/sdk-ts` 中的 `generateArbitrarySignDoc` 函数来生成 ADR-36 兼容的 `signDoc`。然后你可以在浏览器钱包或 CLI 环境中使用它进行签名/验证。请确保使用最新的包版本。
</Callout>

#### 使用 Keplr 等浏览器钱包签名和验证

```typescript theme={null}

(async () => {
  const message = "Offline Sign Message Example";
  const signer = 'inj1...'
  const chainId = 'injective-1'
  
  // 签名任意数据
  const signature = await window.keplr.signArbitrary(chainId, signer, message)
  
  // 验证任意数据
  const result = await window.keplr.verifyArbitrary(chainId, signer, message, signature)
  
  if (result) {
    console.log("Signature is valid");
  }
})();
```

#### 在 CLI 环境中使用 PrivateKey 签名和验证

```typescript theme={null}
import { config } from "dotenv";
import { PrivateKey } from "@injectivelabs/sdk-ts/core/accounts";
import { generateArbitrarySignDoc } from "@injectivelabs/sdk-ts/core/tx";

config();

(async () => {
  const { privateKey } = PrivateKey.generate();
  const injectiveAddress = privateKey.toBech32();
  const publicKey = privateKey.toPublicKey();
  
  const message = "Offline Sign Message Example";
  const { signDocBuff } = generateArbitrarySignDoc(message, injectiveAddress);

  const signature = await privateKey.sign(signDocBuff);
  const signatureInHex = Buffer.from(signature).toString("hex");

  if (
    PrivateKey.verifyArbitrarySignature({
      signature: signatureInHex,
      signDoc: signDocBuff,
      publicKey: publicKey.toHex(),
    })
  ) {
    console.log("Signature is valid");
  }
})();

```