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Overview

This project involves creating a Stable Coin Contract as per below

Project Assignment

The New Dollar

You are a solidity engineer on a team that is building a one of a kind stablecoin that the world has never seen before. This stablecoin uses a very unique pattern and is designed to incentivize people who own these coins to spend them as fast as possible to stimulate the economy. This bank is developing a stablecoin whose user balances reset anytime the bank upgrades their stablecoin smart contract. This means that if the bank has an upgrade every 30 days, you no longer own these stablecoins at the end of the month.

Problem

Design an ERC20 compliant token where the balances reset every time you upgrade it. If you own this stablecoin in January, and there is always a smart contract upgrade at the end of each month, then in February, you should not own those stablecoins anymore. Your token should have all ERC20 interfaces and events. You can use whatever framework or version of solidity that you would like, but you cannot use a framework for handling the creation of the proxy contracts. It would be great to have a few tests to demonstrate functionality without having to manually run through things.

Bonus Task

Build the token so that users balance resets automatically every 30 days in addition to resetting when the smart contract upgrades. This means that the balances will reset when there is a smart contract upgrade, and they will reset on the 30 day schedule.

Contract Names

Contract Name Description
Relay Proxy Contract to handle the Coin upgrade
Stablecoin Initial StableCoin Contract
Stablecoinupgrade Upgraded version of the Stable Coin Contract

Test Script Names

Test Script Description
DeplyStableCoin Deploys StableCoin , Relay, then registers SC to Relay and does asset transfer (Proxy) Contract
DeplyStableCoinUpgrade Deploys Stablecoin Upgrade, Relay, and register SC Upgrade to Relay (Proxy), resets existing balances and does asset transfer
DeplyStableCoinUpgrade Deploys Stablecoin Upgrade, Relay, and register SC Upgrade to Relay (Proxy), resets existing balances and does asset transfer
Deploy-StableCoin-Then-Schedule-Upgrade Invokes DeplyStableCoin, and performs the associated asset transfers and balance resets
TestAllContracts Deploys StableCoin , Relay, then registers SC to Relay and does asset transfer (Proxy) Contract, then deploys Stablecoin Upgrade and registers SC Upgrade to Relay (Proxy), resets existing balances and does asset transfer

Kovan

Contract Name Address
Relay 0x2B995f7B9Ff993722C2e627b881C4e57c3a7372F
Stablecoin 0xe7aAC3B3cB0bEe8f28509A6DcD2a86e387aB83C9
Stablecoinupgrade 0x9270b6C1aA4BB05de81DFb7D10923F839C0eA71E

Testing

  1. In One window start Ganache ganache-cli -e

  2. To run a test end-to-end, deploying the initial Stable Coin Contract then the Upgrade. This transfers assets to 2 accounts in each contract, and resets all balances to zero after each upgrade. run:

$ truffle test ~/StableCoin/test/TestAllContracts.js

  1. To run a test deploying the initial Stable Coin Contract then the Upgrade on a scheduled first of each month, This transfers assets to 2 accounts in each contract, and resets all balances to zero after each upgrade.. run:

    $ nodejs ~/StableCoin/test/Deploy-StableCoin-Then-Schedule-Upgrade.js

  2. To run a test end-to-end, deploying the initial Stable Coin Contract then the Upgrade, run:

    $ truffle test ~/StableCoin/test/TestAllContracts.js