> For the complete documentation index, see [llms.txt](https://docs.fetcch.xyz/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.fetcch.xyz/how-to-integrate/guides/utility/how-to-sign-messages/eip-6492-compatible-signatures.md).

# EIP-6492 Compatible Signatures

We now support EIP-6492 for verifying signatures of pre-deployed smart accounts, as a dev, you have to generate a signature that is EIP-6492 compliant, which will be sent as a normal signature to APIs

Below are the steps to make your normal signature EIP-6492 compliant

### Steps

1. Sign the message from that pre-deployed smart account's owner EOA

2. We will need few data along with signature for signature generation
   1. **Deploy Calldata** - Transaction data for deploying the smart account
   2. **Factory Address** - Smart account factory contract
   3. **Magic Suffix** - `6492649264926492649264926492649264926492649264926492649264926492`

3. Use `AbiCoder` in `ethers` for encoding all of the data

4. ```
   const signature = coder.encode(['address', 'bytes', 'bytes'], [
   ```

   ```typescript
       factoryAddress,
       calldata,
       signature
   ]) + magicSuffix
   ```

5. Use the generate signature in Fetcch API to authenticate tasks

### Reference

* [EIP-6492](https://eips.ethereum.org/EIPS/eip-6492)


---

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