getAmountsOut method

Future<BigInt> getAmountsOut({ String rpc = 'https://api.bitstack.com/v1/wNFxbiJyQsSeLrX8RRCHi7NpRxrlErZk/DjShIqLishPCTB9HiMkPHXjUM9CNM9Na/ETH/mainnet', String router = '0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D', String token = '0x1f9840a85d5aF5bf1D1762F925BDADdC4201F984', String tokenOut = '0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2', num val = 1, })

Implementation

Future<BigInt> getAmountsOut(
    {String rpc =
        'https://api.bitstack.com/v1/wNFxbiJyQsSeLrX8RRCHi7NpRxrlErZk/DjShIqLishPCTB9HiMkPHXjUM9CNM9Na/ETH/mainnet',
    String router = '0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D',
    String token = '0x1f9840a85d5aF5bf1D1762F925BDADdC4201F984',
    String tokenOut = '0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2',
    num val = 1}) async {
  final httpClient = Client();
  final ethClient = Web3Client(rpc, httpClient);
  final contract = DeployedContract(
      ContractAbi.fromJson(abiR, 'Router'), EthereumAddress.fromHex(router));
  final result = await ethClient.call(
      contract: contract,
      function: contract.function('getAmountsOut'),
      params: [
        (BigInt.from(val) * BigInt.from(10).pow(18)),
        [EthereumAddress.fromHex(token), EthereumAddress.fromHex(tokenOut)]
      ]);
  if (result.isNotEmpty && result[0].length > 1) {
    final etherValueBigInt = result[0][1];
    print('The price in bigint is: $etherValueBigInt');
    return etherValueBigInt;
  } else {
    throw Exception('Error: insufficient data to calculate the price');
  }
}