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Setting the Required Gas Fee to Zero in MetaMask on Localhost
As you begin the Solidity tutorial, a crucial step will be to ensure that the gas fee for transactions on the Ethereum blockchain is set correctly. In this article, we will walk you through 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 are the cost of executing a transaction on the Ethereum blockchain. The higher the gas fee, the longer it takes for transactions to be processed and verified by nodes such as the main network or the local node running MetaMask.
Why set the required gas fee to zero?
Setting the required gas fee to zero in the Solidity tutorial may seem counterintuitive at first. However, there is a specific scenario where you would want to set it to zero:
- If you are 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 go to the
Settings tab.
- Click on
Transaction Settings in the left-hand menu.
- Scroll down to the
Gas Fee section.
- Select
Set Gas Limit.
- Enter a value for
Gas Limit, which is usually a minimum of 20,000 (0.020).
- For most use cases, this value should be kept 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 are using the “eth-accounts” module in your Solidity contract, it may not be feasible 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 My Contract {
uint256 public balance;
function deposit() public payable {
balance += msg.value;
// Set gas limit using the “eth-accounts” module (note)
// request(msg.value > 1, "No funds");
// request(totalSupply() >= msg.value, "Transaction amount exceeds total supply");
}
}
In this example, we set the required gas fee to zero by requiring at least 10 units of ether for the “deposit” function. However, please note that setting the required gas fee to zero may not be feasible for all use cases.
Conclusion
Setting the required gas fee to zero in Metamask on localhost can be a useful optimization technique, especially when using local Node.js (Metamask) and certain types of transactions or smart contract features. If you follow these steps, you can set the required gas fee to zero and have your transactions run smoothly.