eth_sign requires 32 byte message hash

[AllLuckly]

error: JSON-RPC error -32000: eth_sign requires 32 byte message hash

  @override
  Future<String> sign(String message, String address) async {
    // TODO: implement sign
    final result = await connector.sendCustomRequest(
      method: 'eth_sign',
      params: [address, message],
    );

    return result;
  }

[HaoCherHong]

Did you use MetaMask as provider? seems something related to this:
web3/web3.js#4780

[HaoCherHong]

This should work if you were using MetaMask
Please check the comment below

import 'dart:convert';
import 'package:crypto/crypto.dart';

// ...
  const messageToSign = "TEST";
  final bytes = utf8.encode(messageToSign);
  final messageHash = sha256.convert(bytes);
  final signature = await provider.sign(
      message: '0x$messageHash', address: session.accounts[0]);

[HaoCherHong]

Using personal_sign instead solves the problem, please check:
https://github.com/RootSoft/walletconnect-dart-sdk/pull/39/files

[RootSoft]

#38 (comment)