This is the OUSD decentralized governance stack.

Getting Started

Install brownie via pipx

The recommended way to install Brownie is via pipx:

python3 -m pip install --user pipx
python3 -m pipx ensurepath

You may need to restart your terminal after installing pipx.

pipx install eth-brownie

Install brownie dependencies

We require OpenZeppelin contract code that is in master and will be released after 4.5.0. Since the release tag has not been created yet we need to import them by commit hash. Once newer version of 4.5.0 is released we can default to that.

brownie pm install OpenZeppelin/[email protected]
brownie pm install OpenZeppelin/[email protected]

Install hardhat

yarn install

Running contract tests (brownie)

cd contracts
brownie test --network hardhat

If this command reverts with an error it may be an incompatability with python 3.10. Try python 3.9 instead (pyenv is a good solution for managing multiple python versions).

Running contract tests (forge)

The OGV staking contracts use forge for tests.

forge install
forge test

Running fork tests (forge)

forge install
forge test --fork-url $ALCHEMY_PROVIDER_URL -vvv --mc "ForkTest"

Running a local node

Copy dev.env to .env and fill out the PROVIDER_URL

Node will be run in forked mode

yarn run node

In another terminal:

brownie run deploy main client/networks/governance.localhost.json

Running brownie console in fork mode

Copy dev.env to .env and fill out the PROVIDER_URL

Node will be run in forked mode

yarn run node

In another terminal:

brownie console --network hardhat-fork

Deploying contracts (with Foundry)

$ DEPLOYER_PRIVATE_KEY=$DEPLOYER_PRIVATE_KEY forge script script/deploy/DeployManager.sol:DeployManager --fork-url $ALCHEMY_PROVIDER_URL --slow --legacy --broadcast --verify --etherscan-api-key $ETHERSCAN_API_KEY

Deploying contracts

Setup environment variables: export WEB3_INFURA_PROJECT_ID=... export ETHERSCAN_TOKEN=... export DEPLOYER_KEY=...

The deployment needs to be done in 2 steps. First one executes the code deployed / altered on mainnet by the deployer account. The second step is able to build the transaction to make a proposal on the governor only when in mainnet-fork mode, so needs to be ran separately.

Step 1

Write a deployment file and then run brownie run [DEPLOYMENT_FILE] --network mainnet

Make sure that script outputs all of the addresses that need to be passed to potential governance proposal.

Step 2

Make sure you copy all the addresses to the governor proposal section of the deploy file.

To build a transaction for Governor MODE=build_ogv_gov_proposal brownie run [DEPLOYMENT_FILE] --network mainnet-fork

Copy the To and Data to transaction builder with an account that has enough veOGV to create a governance proposal.

Optional

Set up virtual environment using python3.

Setup Python environment

# Let's create a new virtual environment
python3 -m venv brownie-deploy
source ./brownie-deploy/bin/activate
pip install -r requirements.txt

To run

source ./brownie-deploy/bin/activate

Git Commands For Merging Branches

Staging (Goerli)

git checkout master
git pull
git checkout staging
git merge --no-ff origin/master
git log --abbrev-commit --pretty=oneline | more
git push origin staging --no-verify

Production (Mainnet)

git checkout master
git pull
git checkout stable
git merge --no-ff origin/staging
git log --abbrev-commit --pretty=oneline | more
git push origin stable --no-verify

Backfilling Database Data

Because we rely on data from blockchain events that occur over time, some features require changes to listener.ts.

The script listens from the latest mainnet block by default, however, when we need data from events in the past we need to reset the listener to an earlier block number.

If required, follow this process post deployment:

1. Update the last_seen_block entry in the listener table of the databse to the block number the OGVStaking.sol contract was deployed at, 15089597 (Note: The more blocks that are mined over time, the longer this process will take):

   1. Connect to the database via Heroku CLI: heroku pg:psql postgresql-transparent-92815 --app ousd-governance-production
   2. Update the block number: INSERT INTO listener (last_seen_block) VALUES ('15089597');

2. Restart all dynos in the production environment's Heroku dashboard:

   1. Click "More"
   2. Click "Restart all dynos" to restart listener.ts

3. Monitor the app logs from the Heroku dashboard to ensure the listener has been properly reset:

   1. Click "More"
   2. Click "View logs"
   3. Look for continued output from the worker showing Got confirmed block 15089597 and onwards.

4. Check that the database is being backfilled with blockchain data:

   1. Connect to the database: heroku pg:psql postgresql-transparent-92815 --app ousd-governance-production
   2. Bring up a table relevant to your new feature: TABLE lockups;
   3. Ensure historic data is being added to the database by listener.ts. If yes, you're good!

Local Gotchas

Here are some places you may come unstuck when setting up locally. If you find any yourself, please document them here to help your fellow engineers:

1. M1 macs (ARM architecture)

Problem:

My ether wallet as a wrtc dependency that doesn't compile on the ARM macs. There is an alternative build of `wrtc available that circumvents the issue, but MEW hasn't incorporated that into their codebase yet. See issue

Solution:

Switch architecture from arm to x64 and install node using x64. It is recommended to use nvm and have that "special" x64 node install aliased, so it is easy to switch anytime from native arm built node to x64 built node.

Switch architecture from arm to x64

arch -x86_64 zsh

Confirm the "current" architure you're on by running

arch

This should return x64/i3/i9..

Install nodejs using nvm. We'll install nodev16 (not 18). This is because of incompatibility with the latest node with m1.

// install node
nvm install v16.16.0

// create nvm alias (just to remember which node has x86 build)
nvm alias x86_node_build v16.16.0

// confirm node has been built in x64
node -p process.arch
// should return x64

// wrtc error should no longer be a problem
yarn install