Specify Gas Fee Overrides For Transaction

// Call an arbitrary contract.
const contractAddress = '0x1f6557356bfb310a556300a36fb18f54fb4791b1';
// The contract's ABI
const contractAbi = [...]; // Replace with your contract's ABI
// Create an instance of the contract
const contract = new ethers.Contract(contractAddress, contractAbi, signer);
// Get the calldata for a contract call
const calldata = contract.interface.encodeFunctionData('someFunction', ['arg1', 'arg2']);

// Call the contract, with gas sponsored by the paymaster.
const contractCallTxInfo = await hallidayClient.callContract({
  from_in_game_player_id: userInGameId,								// your user's id in your application
  target_address: contractAddress,
  value: "0",
  calldata,
  sponsor_gas: true,
  gas_fee_overrides: {
    max_fee_per_gas: "0x888888888", // Specify 0x888888888 wei as max fee 
    max_priority_fee_per_gas: "0x9999999"; // Specify 0x9999999 wei as max priority fee
  };
});