Skip to main content

EIP-1559

Ronin is preparing for an upcoming hardfork that will introduce a base fee mechanism for gas pricing, in line with EIP-1559. This update will improve fee predictability and network efficiency by changing how gas prices are calculated.

The Ronin mainnet hardfork is expected to go live on March 17th at block 43447600. Saigon testnet has already been updated. We encourage you to test and adjust your applications in advance.

What's Changing?​

  • Before the hardfork: The minimum gas price is 20 gwei.
  • After the hardfork: The minimum gas price will be 20 gwei + base fee.
  • The base fee starts at 1 gwei but can increase based on network congestion.

Why EIP-1559?​

EIP-1559 introduces a dynamic fee structure, offering several benefits:

  • Better fee estimation: The base fee adjusts automatically, reducing the risk of overpaying.
  • Network stability: Helps prevent gas price spikes during high traffic.
  • More efficient transactions: Encourages optimal gas usage and reduces unnecessary bidding wars.
Action Required!

If your application hardcodes gas prices at 20 gwei, update it to accommodate the new base fee mechanism.

How to detect if EIP-1559 is applied​

The Ronin mainnet hardfork is expected to go live on March 17th at block 43447600. To ensure a smooth transition in your application, you can switch the logic, based on the block number or use the following methods.

JSON RPC​

By calling eth_feeHistory, you can automatically check whether EIP-1559 is applied. If baseFeePerGas is 0x0, the upgrade has not yet happened. If baseFeePerGas returns a nonzero value, EIP-1559 is active.

Before the hard fork (Ronin mainnet example):​

curl -X POST https://api.roninchain.com/rpc \
-H "Content-Type: application/json" \
-d '{"jsonrpc": "2.0","method": "eth_feeHistory", "params": [1, "latest", []], "id": 1}'

Response

{"jsonrpc":"2.0","id":1,"result":{"baseFeePerGas":["0x0","0x0"], ... }}

After the hard fork (Saigon testnet example):​

curl -X POST https://saigon-testnet.roninchain.com/rpc \
-H "Content-Type: application/json" \
-d '{"jsonrpc": "2.0", "method": "eth_feeHistory","params": [1, "latest", []], "id": 1}'

Response

{"jsonrpc":"2.0","id":1,"result":{"baseFeePerGas":["0x3b9aca00","0x3b9aca00"], ... }}

Ethers v6 example​

In Ethers v6 provider.getFeeData() can be used:

import { ethers } from "ethers";

/*
const RPC_ENDPOINT = "https://api.roninchain.com/rpc";
const NETWORK = new ethers.Network("ronin", "2020");
*/

const RPC_ENDPOINT = "https://saigon-testnet.roninchain.com/rpc";
const NETWORK = new ethers.Network("saigon", "2021");

(async () => {

  const provider = new ethers.JsonRpcProvider(RPC_ENDPOINT, NETWORK, {
    staticNetwork: NETWORK,
  });

  const feeData = await provider.getFeeData();

  if(feeData?.maxFeePerGas && feeData?.maxPriorityFeePerGas){
    console.log("EIP1559 supported");
  }else{
    console.log("use legacy gas pricing");
  }

})();

See also​