Avalanche API method that returns the current gas base fee of the network. The gas price is the quantity of the native token the transaction's sender must pay per unit of gas consumed. The value returned is in Wei.
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Parameters
none
Response
quantity
β the integer value of the current gas base fee, returned in Wei
eth_gasPrice
code examples
eth_gasPrice
code examplesconst Web3 = require("web3");
const NODE_URL = "CHAINSTACK_NODE_URL";
const web3 = new Web3(NODE_URL);
async function getGasPrice() {
const baseFee = await web3.eth.getGasPrice();
console.log(`the base gas fee is: ${baseFee} Wei`);
}
getGasPrice()
const ethers = require('ethers');
const NODE_URL = "CHAINSTACK_NODE_URL";
const provider = new ethers.JsonRpcProvider(NODE_URL);
async function getGasPrice() {
const baseFee = await provider.send("eth_gasPrice");
console.log(`The base gas fee is: ${baseFee} Wei`);
}
getGasPrice()
from web3 import Web3
node_url = "CHAINSTACK_NODE_URL"
web3 = Web3(Web3.HTTPProvider(node_url))
print(web3.eth.gas_price)
Use case
You can use eth_gasPrice
to calculate the total gas value to send with a transaction based on the base and priority fee system. This concept was implemented with EIP-1559 in Ethereum's London hard fork.
EIP-1559 aimed to solve the problem of network congestion by implementing a dynamic fee market mechanism, which adjusts the fee required to process a transaction based on network demand. with the current system, the total gas price is composed of a base fee determined by the network's load and a priority fee added by the user.
Note
The
eth_gasPrice
method returns the base fee.
The following script calculates the total fee to send with a transaction based on the base fee and an arbitrary priority fee that the user can choose.
const Web3 = require("web3");
const NODE_URL = "CHAINSTACK_NODE_URL";
const web3 = new Web3(NODE_URL);
async function getGas(priorityFee) {
const priorityFeeWei = web3.utils.toWei(String(priorityFee), 'gwei');
const baseFee = await web3.eth.getGasPrice();
const totalFee = Number(priorityFeeWei) + Number(baseFee)
return [totalFee, baseFee]
}
async function main() {
// The priority fee is constant at 2 nAVAX, the user can change it.
const PRIORITY_FEE = 2;
const [totalFee, baseFee] = await getGas(PRIORITY_FEE)
const baseFeeGwei = web3.utils.fromWei(String(baseFee), 'gwei')
console.log(`The priority fee: ${PRIORITY_FEE} nAVAX.`)
console.log(`The Avalanche base fee at this moment is: ${Number(baseFeeGwei).toFixed(2)} nAVAX.`)
const gweiFee = web3.utils.fromWei(String(totalFee), 'gwei')
console.log(`The total gas fee should be at least: ${Number(gweiFee).toFixed(2)} nAVAX.`)
}
main()
The getGas
function calculates the total fee required to process a transaction. The function takes in a priorityFee
as input representing the fee a user is willing to pay to prioritize their transaction processing. The function first converts the priorityFee
from Gwei to Wei (the smallest unit of ether) using web3.utils.toWei
. Then, it uses the web3.eth.getGasPrice
method to retrieve the current base fee set by the network. The function finally adds the priority fee to the base fee and returns the total fee along with the base fee as an array.
The main
function is the entry point of the code. It first sets a constant PRIORITY_FEE
to 2 Gwei. Then calls the getGas
function with PRIORITY_FEE
as an argument and destructures the returned array into two variables totalFee
and baseFee
. The code then converts baseFee
and totalFee
from Wei to nAVAX using web3.utils.fromWei
for better readability, and logs the results to the console.
The main function logs the priority fee, the base fee at that moment, and the minimum recommended total fee that should be paid to process a transaction.
Try the eth_gasPrice
RPC method yourself
eth_gasPrice
RPC method yourself