web3dart_get_fee_data

A Dart package for retrieving Ethereum fee data with full EIP-1559 support. Provides an API similar to ethers.js getFeeData().

Features

• ✅ EIP-1559 Support: Get maxFeePerGas and maxPriorityFeePerGas
• ✅ Legacy Compatibility: Automatic fallback to gasPrice
• ✅ Network Detection: Handles both EIP-1559 and legacy networks
• ✅ Type Safe: Full Dart type safety with nullable types

Installation

Add this package to your pubspec.yaml:

dependencies:
  web3dart_get_fee_data: ^1.0.2

Then run:

dart pub get

Usage

import 'package:web3dart/web3dart.dart';
import 'package:web3dart_get_fee_data/web3dart_get_fee_data.dart';
import 'package:http/http.dart';

void main() async {
  final httpClient = Client();
  final ethClient = Web3Client('https://eth.llamarpc.com', httpClient);

  try {
    final feeData = await getFeeData(ethClient);

    if (feeData.maxFeePerGas != null) {
      print('EIP-1559: ${feeData.maxFeePerGas} wei');
    } else {
      print('Legacy: ${feeData.gasPrice} wei');
    }
  } finally {
    ethClient.dispose();
  }
}

API

getFeeData(Web3Client client)

Returns Future<FeeData> with current network fees.

FeeData

Network Support

EIP-1559 Networks: Returns all three properties
Legacy Networks: Returns only gasPrice

License

MIT License - see LICENSE file.