sendTransaction

Future<String> sendTransaction({
  required String chainId,
  required String to,
  String? from,
  String? value,
  String? data,
  String? gas,
  String? gasPrice,
  String? maxFeePerGas,
  String? maxPriorityFeePerGas,
  String? nonce,
})

import 'package:portal_flutter/portal_flutter.dart';

final portal = Portal();

// Simple ETH transfer
final txHash = await portal.sendTransaction(
  chainId: 'eip155:1',
  to: '0xRecipientAddress',
  value: '0xDE0B6B3A7640000', // 1 ETH in wei (hex)
);

print('Transaction hash: $txHash');

final txHash = await portal.sendTransaction(
  chainId: 'eip155:1',
  to: '0xRecipientAddress',
  value: '0x10',
  maxFeePerGas: '0x3B9ACA00',
  maxPriorityFeePerGas: '0x3B9ACA00',
);

final txHash = await portal.sendTransaction(
  chainId: 'eip155:1',
  to: '0xContractAddress',
  data: '0xa9059cbb...', // Encoded function call
  gas: '0x5208',
);