Function verifyEIP6492Signature

verifyEIP6492Signature(
    walletAddress: string,
    messageHash: string,
    signature: string,
    provider: unknown,
): Promise<boolean>
Verifies a signature using EIP-6492 (universal signature verification).

This supports both deployed and undeployed smart wallets.
Parameters
- walletAddress: string
  Wallet address (may be counterfactual)
- messageHash: string
  Hash of the message that was signed
- signature: string
  The signature (may include deployment data)
- provider: unknown
  Ethereum provider
Returns Promise<boolean>
True if signature is valid
- Defined in extensions/src/sign-in-with-x/server.ts:746