eth_signUserOperation

Future<PortalProviderResponse> request({
  required String chainId,
  required String method,  // 'eth_signUserOperation'
  required List<Object?> params,
  String? signatureApprovalMemo,
})

import 'package:portal_flutter/portal_flutter.dart';

final portal = Portal();

// Sign a UserOperation on Sepolia testnet
final result = await portal.request(
  chainId: 'eip155:11155111',
  method: 'eth_signUserOperation',
  params: [
    {
      'to': '0xRecipientAddress',
      'value': '0x0',
      'data': '0x',
    }
  ],
);

if (result.error != null) {
  print('Error: ${result.error}');
} else {
  print('Signed UserOp: ${result.result}');
}

final result = await portal.request(
  chainId: 'eip155:11155111',
  method: 'eth_signUserOperation',
  params: [
    {
      'to': '0xRecipientAddress',
      'value': '0xDE0B6B3A7640000', // 1 ETH in wei
      'data': '0x',
      'maxFeePerGas': '0x3B9ACA00',
      'maxPriorityFeePerGas': '0x3B9ACA00',
    }
  ],
);