Ethereum Carbon Emissions Calculator

Made with ♥ by Offsetra.com for carbon.fyi.

License: MIT.

Please cite Offsetra if you use this in your project, we really appreciate it! 🙏

Questions, comments, forks and PRs all very much appreciated!

Summary

JavaScript utility to calculate the CO2 emissions of any Ethereum address or contract.

The tool is written in TypeScript and powered by the the Etherscan.io API & an open-source carbon accounting methodology under development by Offsetra. We hope this tool is useful for raising awareness and understanding with regards to the rapidly growing carbon emissions of cryptocurrency mining.

Usage

This calculator should work in any client or server-side JavaScript environment.

npm install ethereum-emissions-calculator

The calculator exports two methods:

• calculateAddressEmissions
• calculateContractEmissions

calculateAddressEmissions

calculateAddressEmissions will only allocate emissions for outgoing (sent) transactions.

Provide an address and a transactionType, and the calculator will tell you how many emissions this represents in KG CO2e. To calculate the sum total emissions for an address, you must combine the sum of eth, erc20, and erc721 emissions.

import { calculateAddressEmissions } from "ethereum-emissions-calculator";
import { address, etherscanAPIKey } from "data";

const emissions = await calculateAddressEmissions({
  transactionType: "eth", // "eth" | "erc20" | "erc721"
  address, // 0x12345[...]
  etherscanAPIKey,
});

console.log(emissions);
// {
//   transactionType: "eth",
//   kgCO2: 12345,
//   transactionsCount: 69,
//   gasUsed: 420,
// }

calculateContractEmissions

The only difference between this method and calculateAddressEmissions, is that this method will also calculate and add emissions from incoming transactions. We have included this method at the request of platforms who are interested in calculating the collective impact of their contract, however for most cases we think calculateAddressEmissions makes more sense (to avoid double-counting the same emissions-- sender takes responsibility!)

import { calculateContractEmissions } from "ethereum-emissions-calculator";
import { address, etherscanAPIKey } from "data";

const emissions = await calculateContractEmissions({
  transactionType: "eth", // "eth" | "erc20" | "erc721"
  address, // 0x12345[...]
  etherscanAPIKey,
});

console.log(emissions);
// {
//   transactionType: "eth",
//   kgCO2: 12345,
//   transactionsCount: 69,
//   gasUsed: 420,
// }

Methodology

The total emissions are derived from the amount of gas used for each transaction. See https://carbon.fyi/learn for a brief intro and link to more in-depth explainers.

We would like to integrate the actuall carbon accounting methodology and hash-rate calculations into this repository at some point in the near future. Let us know if you'd like to put in a PR to help us along!