Method signMessage

lib/TransactionKit.ts:694–787

({ message }: { message: SignableMessage })

    const eip6492Account: LocalAccount<string, Address> = {
      ...owner,
      async signMessage({ message }: { message: SignableMessage }) {
        // First, get the standard signature from the underlying account
        // This will delegate to WalletConnect/MetaMask/provider if the owner account is provider-based
        const standardSignature = await walletClient.signMessage({
          account: owner,
          message: message as string,
        });

        // Get or create the authorization
        const isAlreadyInstalled =
          await self.isDelegateSmartAccountToEoa(signChainId);

        let authorization: SignAuthorizationReturnType | undefined;

        // Get authorization for EIP-6492 wrapper
        // We always need authorization data for the EIP-6492 signature format,
        // regardless of whether the account is already installed or not
        if (!isAlreadyInstalled) {
          // When not installed, use delegateSmartAccountToEoa to get authorization
          // This ensures proper initialization and state management
          const delegateResult = await self.delegateSmartAccountToEoa({
            chainId: signChainId,
            delegateImmediately: false,
          });

          if (!delegateResult.authorization) {
            throw new Error(
              'Failed to create authorization for EIP-6492 signature'
            );
          }

          authorization = delegateResult.authorization;
        } else {
          // When already installed, sign authorization directly
          const delegateAddress = KernelVersionToAddressesMap[KERNEL_V3_3]
            .accountImplementationAddress as `0x${string}`;

          authorization = await bundlerClient.signAuthorization({
            account: owner,
            contractAddress: delegateAddress,
          });
        }

        if (!authorization) {
          throw new Error(
            'Failed to create authorization for EIP-6492 signature. ' +
              'This may be due to network issues, bundler API problems, or account configuration. ' +
              'Please check your network connection and bundler API key, or try again later.'
          );
        }

        // Encode authorization for EIP-7702
        // Normalize authorization fields and provide safe fallbacks
        const authChainIdHex = toHex(authorization.chainId);
        const authNonceHex = toHex(authorization.nonce);
        const authVHex = toHex(authorization.v ?? 0);
        const authR = authorization.r;
        const authS = authorization.s;