The flashloan attacks happened here:

OUSD is a new kind of stablecoin that passively accrues yield while you are holding it.

• Node Version
  • ^8.11.2 >= node <=^14.0.0
  • Recommended ^14.0.0
• Web3 Wallet
  • Recommended Metamask

# Clone the origin-dollar project
git clone [email protected]:OriginProtocol/origin-dollar.git

The origin-dollar project is a mono repo that houses both the smart contracts and dApp codebases. In order to run this project locally, you will need to run both the node and the dapp in separate processes or terminals.

The smart contracts and all of their associated code is located in the <project-root>/contracts directory. Ethereum tests and local Ethereum EVM are managed by Hardhat.

A variety of Hardhat tasks are available to interact with the contracts. Additional information can be found by running npx hardhat from the contracts/ directory.

The dApp and it's associated code is located in the <project-root>/contracts directory.

You have two options for running the Ethereum node locally via hardhat.

• Forked mode - A forked version of mainnet at a particular block height
• Standalone mode - A private blockchain with a clean slate

Preferred default development mode is Forked mode. It has a benefit of more closely mimicking behavior of mainnet which is helpful for discovering bugs (that are not evident in local mode) and not requiring setting up complex third party contracts (like Curve and Uniswap V3)

The dApp will be started in development mode by default with debugging enabled and runs in standalone or forked as well - depending on the mode that the underlying hardhat node is running.

Open a separate terminal to run the hardhat node in.

# Enter the smart contracts dir
cd contracts

# Install the dependencies - Note your Node version 'Requirements' 
yarn install

# Compiles and deploys the contracts (necessary to populate dapp/abis dir, which is needed to run the dapp)
yarn deploy

Rename contracts/dev.env to .env and set PROVIDER_URL to a valid one. If you would like the forked net to mimic a more recent state of mainnet update the BLOCK_NUMBER. And add your mainnet testing account(s) (if more than one comma separate them) under the ACCOUNTS_TO_FUND. After the node is started up the script will transfer 100k of USDT, OUSD and DAI to those accounts.

# Run the local hardhat node in forked mode
yarn run node:fork

# Run the local hardhat node
yarn run node

You will be needing stablecoins such as USDT, USDC, DAI, etc to mint the OUSD coin for usage in the dApp. Visit:

• visit http://localhost:3000/dashboard and click on the buttons of the coins you want minted
  
  

# Mint 1000 of each supported stablecoin to each account defined in the mnemonic
npx hardhat fund --amount 1000 --network localhost

• You will need your web3 wallet configured before you can interact with the dapp. Make sure that you have one - refer [HERE](### Configure Web3 Wallet) for Metamask instructions.
• You will also need the dApp to be running, so refer [HERE](### Running the dApp Locally) for instructions.

You will need a web3 wallet to interact with the dApp and sign transactions. Below are the instructions to setup Metamask to interact with the dApp running locally.

• Install Metamask Chrome extension HERE
• Create/Open Metamask wallet
• Add a custom RPC endpoint
  • Name: origin - just an example
  • URL: http://localhost:8545
  • Chain ID: 1337
    
    

Just use account(s) you normally use on mainnet.

You can get all the accounts for the locally running node and their associate private keys by running the command

# For Standalone mode
npx hardhat accounts --network localhost

Choose a test account past index 3 - accounts 0-3 are reserved. Copy the private key and import it into Metamask as follows:

• Click the current account icon in the uppor right corner of Metamask
• Select Import Account => paste private key => Click Import

Make sure that you select your newly created RPC endpoint in the networks dropdown and use your newly imported account in Metamask. You should now be setup to use Metamask to interact with the dApp.

Note: If you want to add all the accounts via a new Metamask wallet and import the mnemonic it is located in contracts/hardhat.config.js. Make sure that you use Account 4 and up for test accounts as 0-3 are reserved.

Open a separate terminal to run the dApp in.

# Enter the smart dApp dir
cd dApp

# Install the dependencies - Note your Node version 'Requirements' 
yarn install

The dApp will need to be started in standalone or forked mode - depending on how the hardhat node is running.

# Start the dApp in forked mode
yarn run start:fork

# Start the dApp in standalone mode
yarn run start

• Open http://localhost:3000 in your browser and connect your Metamask account. See [HERE](### Configure Web3 Wallet) for instructions if you have not done that yet.
• Open http://localhost:3000/swap and verify that you have stablecoins in your account. See [HERE](### Minting Stablecoins on the Local Hardhat Node) for instructions if you don't see a balance.

When freshly starting a node it is usually necessary to also reset Metamask Account being used:

• Metamask => Settings => Advanced => Reset Account
  
  This will reset the nonce number that is incorrect if you have submitted any transactions in previous runs of the ethereum node. (Wallet has a too high nonce number comparing to the nonce state on the node)

If you get an error Command "husky-run" not found. type of error: Go to root of the project and run npx husky install

There may be a time that you will need to run the dApp in production/staging mode to test out a certain feature or do verification before a deploy. In this case there is no need for a local node as you will connect directly to the mainnet/testnet.

• Google Cloud CLI tool installed as explained HERE
• Permission to the Origin GCP Account to decrypt *.secrets.enc and deploy infrastructure

# Login to GCP
gcloud auth login

# Decrypt staging secrets to local
yarn run decrypt-secrets:staging

# Start local dApp in Staging mode
yarn run start:staging

# Decrypt staging secrets to local
yarn run decrypt-secrets:production

# Start local dApp in Production mode
yarn run start:production

Smoke tests can be run in 2 modes:

• Run scripts/test/smokeTest.sh to launch interactive mode. All the "before contract changes" parts of tests will execute and wait for the user to manually using a console performs contract changes. Once those are done hit "Enter" in the smoke test console and the second part of the tests shall be ran that validate that contract changes haven't broken basic functionality.
• Run scripts/test/smokeTest.sh --deployid [numeric_id_of_deploy] will run smoke tests against a specific deployid. Validating that that deploy didn't break basic functionality.
  
  

Want to hack on Origin? Awesome!

Origin is an Open Source project and we welcome contributions of all sorts. There are many ways to help, from reporting issues, contributing code, and helping us improve our community.

If you are thinking about contributing see our Contribution page