Set the required gas fee in Metamask on localhost to zero
When starting your Solidity tutorial, a crucial step is to make sure that the gas fee is set correctly for transactions on the Ethereum blockchain. In this article, we will show you how to set the required gas fee to zero using MetaMask on localhost.
What is a gas fee?
Before diving into the solution, it is important to understand what gas fees are. Gas fees represent the cost of executing a transaction on the Ethereum blockchain. The higher the gas price, the longer it takes for transactions to be processed and verified by nodes such as the mainnet or the local node running Metamask.
Why set the required gas fee to zero?
In your Solidity tutorial, setting the required gas fee to zero may seem counterintuitive at first. However, there is a specific scenario where you may want to set it to zero:
- When using local Node.js (Metamask) on localhost.
- For certain types of transactions or smart contract features.
Method 1: Set the required gas fee to zero
To achieve this, follow these steps:
- Open your MetaMask wallet and navigate to the
Settings tab.
- Click
Transaction Settingsin the left-hand menu.
- Scroll down to the
Gas Fee section.
- Select
Set Gas Limit.
- Enter a value for the
Gas Limit, which is usually set to at least 20,000 (0.020).
- For most applications, it is recommended to keep this value at or below 10,000 (0.010). This ensures that the required gas fee is zero.
Method 2: Using the eth-accounts module
If you use the eth-accounts module in your Solidity contract, you may not be able to set the required gas fee to zero. In this case, you can use the following code snippet as a guide:
pragma solidity ^0.8.0;
contract MyContract {
uint256 public balance;
function deposit() public payable {
balance += msg.value;
// Set the gas limit with the eth-accounts
module (commented out)
// require(msg.value > 1, "Insufficient funds");
// require(totalSupply() >= msg.value, "Transaction amount exceeds total supply");
}
}
In this example, the required gas fee is set to zero, requiring a minimum of 10 units of Ether for the deposit function. However, please note that setting the required gas fee to zero may not be possible for all use cases.
Conclusion
Setting the required gas fee to zero in Metamask on the local host can be a useful optimization technique, especially when using local Node.js (Metamask) and certain types of transactions or smart contract functionality. By following these steps, you can reduce the required gas fee to zero and ensure smoother transaction processing.