> ## 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.

# Verify Signatures with EVM Libraries

> Verify message and transaction signatures using Ethers, Viem, or Wagmi

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>;
};

Verify the authenticity of signed messages and typed data to ensure they originated from the expected address.

## Prerequisites

You need Web3 libraries configured with Para authentication.

<Card title="Setup Web3 Libraries" description="Configure Ethers.js, Viem, or Wagmi with Para before proceeding" href="/v3/react/guides/web3-operations/evm/setup-libraries" />

<Tabs>
  <Tab title="Ethers.js">
    ## Verify Personal Signatures

    ```typescript theme={null}
    import { ethers } from "ethers";

    async function verifyPersonalSignature(
      message: string,
      signature: string,
      signerAddress: string
    ) {
      const recoveredAddress = ethers.verifyMessage(message, signature);
      const isValid = recoveredAddress.toLowerCase() === signerAddress.toLowerCase();
      console.log("Signature valid:", isValid);
      return isValid;
    }
    ```

    ## Verify Typed Data Signatures (EIP-712)

    ```typescript theme={null}
    import { ethers } from "ethers";

    async function verifyTypedDataSignature(
      domain: any,
      types: any,
      value: any,
      signature: string,
      signerAddress: string
    ) {
      const recoveredAddress = ethers.verifyTypedData(domain, types, value, signature);
      const isValid = recoveredAddress.toLowerCase() === signerAddress.toLowerCase();
      console.log("Signature valid:", isValid);
      return isValid;
    }
    ```
  </Tab>

  <Tab title="Viem">
    ## Verify Personal Signatures

    ```typescript theme={null}
    import { verifyMessage } from "viem";

    async function verifyPersonalSignature(
      address: `0x${string}`,
      message: string,
      signature: `0x${string}`
    ) {
      const isValid = await verifyMessage({
        address,
        message,
        signature,
      });
      console.log("Signature valid:", isValid);
      return isValid;
    }
    ```

    ## Verify Typed Data Signatures (EIP-712)

    ```typescript theme={null}
    import { verifyTypedData } from "viem";

    async function verifyTypedDataSignature(
      address: `0x${string}`,
      domain: any,
      types: any,
      primaryType: string,
      message: any,
      signature: `0x${string}`
    ) {
      const isValid = await verifyTypedData({
        address,
        domain,
        types,
        primaryType,
        message,
        signature,
      });
      console.log("Signature valid:", isValid);
      return isValid;
    }
    ```
  </Tab>

  <Tab title="Wagmi">
    ## Verify Personal Signatures

    ```typescript theme={null}
    import { useVerifyMessage } from "@getpara/react-sdk/wagmi";

    function VerifyPersonalSignature({
      address,
      message,
      signature,
    }: {
      address: `0x${string}`;
      message: string;
      signature: `0x${string}`;
    }) {
      const { data: isValid, isLoading } = useVerifyMessage({
        address,
        message,
        signature,
      });

      if (isLoading) return <div>Verifying signature...</div>;

      return <div>Signature valid: {isValid ? "Yes" : "No"}</div>;
    }
    ```

    ## Verify Typed Data Signatures (EIP-712)

    ```typescript theme={null}
    import { useVerifyTypedData } from "@getpara/react-sdk/wagmi";

    function VerifyTypedDataSignature({
      address,
      domain,
      types,
      primaryType,
      message,
      signature,
    }: {
      address: `0x${string}`;
      domain: any;
      types: any;
      primaryType: string;
      message: any;
      signature: `0x${string}`;
    }) {
      const { data: isValid, isLoading } = useVerifyTypedData({
        address,
        domain,
        types,
        primaryType,
        message,
        signature,
      });

      if (isLoading) return <div>Verifying typed data signature...</div>;

      return <div>Typed Data Signature valid: {isValid ? "Yes" : "No"}</div>;
    }
    ```
  </Tab>
</Tabs>

## Next Steps

<CardGroup cols={3}>
  <Card title="Sign Messages" description="Sign plain text messages for authentication or verification" href="/v3/react/guides/web3-operations/evm/sign-messages" icon="signature" />

  <Card title="Sign Typed Data" description="Sign structured data using the EIP-712 standard" href="/v3/react/guides/web3-operations/evm/sign-typed-data" icon="file-signature" />

  <Card title="Execute Transactions" description="Execute arbitrary transactions with lifecycle management" href="/v3/react/guides/web3-operations/evm/execute-transactions" icon="code" />
</CardGroup>