The problem GreenCash solves

Overview

Green Cash is a drop-in token replacement that takes the form of an ERC20-wrapper contract.

DeFi app developers can replace the tokens they normally use in their apps by wrapping them in our GreenWrapper contract. By doing this, they don't have to change anything in their apps while reducing their carbon footprint.

We manage this by placing the real tokens in an interest-bearing DeFi app (such as Aave) and using the yield to offset carbon emissions through Toucan's liquid carbon tokens BCT.

Using GreenTokens

Of course, this project requires other projects and protocols to switch to a GreenToken (such as GreenUSDC), without modifying their logic; however we're also building features of our own in order to bootstrap usage, this includes sending/receiving Green Stablecoins gaslessly.

It makes any protocol a bit more climate-friendly at no cost to their users or features.

Challenges we ran into

At first, we struggled to find a good idea because we wanted to be aligned with the Solarpunk ethos, and Ethereum smart contracts often lack grounding in the real world.
Another challenge was finding a reliable protocol to offset carbon emissions and complying with its interfaces.