EnterDao Kernel

Implements continuous rewards for staking ENTR in the DAO. Implements logic for determining DAO voting power based upon amount of ENTR deposited (which becomes vENTR) plus a multiplier (up to 2x) awarded to those who lock their ENTR in the DAO for a specified period (up to 1 year). Those that lock their vENTR for 1 year receive a 2x multiplier; those that lock their vENTR for 6 months receive a 1.5x multiplier, and so on. Also allows users to delegate their vENTR voting power to a secondary wallet address. NOTE: The vENTR multiplier ONLY affects voting power; it does NOT affect rewards. All users who stake ENTR receive the same reward rate regardless of the amount of time they have locked or not locked.

Contracts

Kernel.sol

Allows users to deposit ENTR into the DAO, withdraw it, lock for a time period to increase their voting power (does not affect rewards), and delegate their vENTR voting power to a secondary wallet address. Interacts with Rewards.sol contract to check balances and update upon deposit/withdraw. Interacts with Governance.sol contract to specify how much voting power (vENTR) a wallet address has for use in voting on or creating DAO proposals.

Actions

• deposit
• withdraw
• lock
• delegate

Rewards.sol

Rewards users who stake their ENTR on a continuous basis. Allows users to Claim their rewards which are then Transfered to their wallet. Interacts with the CommunityVault.sol which is the source of the ENTR rewards. The Kernel contract calls the registerUserAction hook on each deposit/withdraw the user executes, and sends the results to the Rewards contract.

How it works

1. every time the acKFunds function detects a balance change, the multiplier is recalculated by the following formula:

newMultiplier = oldMultiplier + amountAdded / totalENTRStaked

2. whenever a user action is registered (either by automatic calls from the hook or by user action (claim)), we calculate the amount owed to the user by the following formula:

newOwed = currentlyOwed + userBalance * (currentMultiplier - oldUserMultiplier)

where:
- oldUserMultiplier is the multiplier at the time of last user action
- userBalance = kernel.balanceOf(user) -- the amount of $ENTR staked into the Kernel

3. update the oldUserMultiplier with the current multiplier -- signaling that we already calculated how much was owed to the user since his last action

Smart Contract Architecture

EnterDao Kernel is a fork of BarnBridge Barn. It shares the same architecture:

Check out more detailed smart contract Slither graphs with all the dependencies: BarnBridge-Barn Slither Graphs.

Specs

• user can stake ENTR for vENTR
  • user can lock ENTR for a period up to 1 year and he gets a bonus of vENTR
    • bonus is linear, max 1 year, max 2x multiplier
      • example:
        • lock 1000 ENTR for 1 year → get back 2000 vENTR
        • lock 1000 ENTR for 6 months → get back 1500 vENTR
    • bonus has a linear decay relative to locking duration
      • example: lock 1000 ENTR for 1 year, get back 2000 vENTR at T0 → after 6 months, balance is 1500 vENTR → after 9 months, balance is 1250 vENTR
    • user can only withdraw their ENTR balance after lock expires
  • user can keep ENTR unlocked and no bonus is applied, vENTR balance = ENTR balance
• user can stake more ENTR
  • no lock → just get back the same amount of vENTR
  • lock
    • lock period stays the same
      • base balance is increased with the added ENTR
      • multiplier stays the same
    • lock period is extended
      • base balance is increased with the added ENTR
        • multiplier is recalculated relative to the new lock expiration date
• user can delegate vENTR to another user
  • there can be only one delegatee at a time
  • only actual balance can be delegated, not the bonus
  • delegated balance cannot be locked
  • user can take back the delegated vENTRs at any time

Initial Setup

Install NVM and the latest version of NodeJS 12.x

curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.38.0/install.sh | bash
# Restart terminal and/or run commands given at the end of the installation script
nvm install 12
nvm use 12

Use Git to pull down the EnterDao Kernel repository from GitHub

git clone [email protected]:EnterDAO/ENTER-Kernel.git
cd ENTER-Kernel

Create config.ts using the sample template config.sample.ts

cp config.sample.ts config.ts

Updating the config.ts file

Create an API key with Infura to deploy to Ethereum Public Testnet. In this guide, we are using Kovan.

1. Navigate to Infura.io and create an account
2. Log in and select "Get started and create your first project to access the Ethereum network"
3. Create a project and name it appropriately
4. Then, switch the endpoint to Rinkeby, copy the https URL and paste it into the section named rinkeby
5. Finally, insert the mnemonic phrase for your testing wallet. You can use a MetaMask instance, and switch the network to Rinkeby on the upper right. DO NOT USE YOUR PERSONAL METAMASK SEED PHRASE; USE A DIFFERENT BROWSER WITH AN INDEPENDENT METAMASK INSTALLATION
6. You'll need some Kovan-ETH (it is free) in order to pay the gas costs of deploying the contracts on the TestNet; you can use your GitHub account to authenticate to the KovanFaucet and receive 2 Kovan-ETH for free every 24 hours

Create an API key with Etherscan

1. Navigate to EtherScan and create an account
2. Log in and navigate to MyAPIKey
3. Use the Add button to create an API key, and paste it into the indicated section towards the bottom of the config.ts file

Verify contents of config.ts; it should look like this:

        import { NetworksUserConfig } from "hardhat/types";
        import { EtherscanConfig } from "@nomiclabs/hardhat-etherscan/dist/src/types";

        export const networks: NetworksUserConfig = {
            // Needed for `solidity-coverage`
            coverage: {
                url: "http://localhost:8555"
            },

            // Kovan
            kovan: {
                url: "https://kovan.infura.io/v3/INFURA-API-KEY",
                chainId: 42,
                accounts: {
                    mnemonic: "YourKovanTestWalletMnemonicPhrase",
                    path: "m/44'/60'/0'/0",
                    initialIndex: 0,
                    count: 10
                },
                gas: 3716887,
                gasPrice: 20000000000, // 20 gwei
                gasMultiplier: 1.5
            },

            // Mainnet
            mainnet: {
                url: "https://mainnet.infura.io/v3/YOUR-INFURA-KEY",
                chainId: 1,
                accounts: ["0xaaaa"],
                gas: "auto",
                gasPrice: 50000000000,
                gasMultiplier: 1.5
            }
        };

        // Use to verify contracts on Etherscan
        // https://buidler.dev/plugins/nomiclabs-buidler-etherscan.html
        export const etherscan: EtherscanConfig = {
            apiKey: "YourEtherscanAPIKey"
        };

Installing

Install NodeJS dependencies which include HardHat

npm install

Compile the contracts

npm run compile

Running Tests

npm run test

Note: The result of tests is readily available here.

Running Code Coverage Tests

npm run coverage

Audits

EnterDao Kernel is a fork of BarnBridge Barn. Here you can find the audits for the original contract:

• QuantStamp
• Haechi

Deployment

• Deploys all the facets
• Deploys the Kernel Diamond with all the facets as diamond cuts
• Deploys the Rewards contract
• Configures the Pull Token
• Verifies all contracts at Etherscan

npx hardhat deploy \
    --network <network name> \ 
    --entr <ENTR token> \
    --cv <community vault address> \
    --start <start timestamp for rewards> \
    --end <end timestamp for rewards> \
    --rewards-amount <rewards amount> \

Mainnet

DiamondCutFacet deployed to: 0xCD98aFdc3f8B56daa318eBa929F1A865AeE7cc4f
DiamondLoupeFacet deployed to: 0xEdf1BcC415f60989c176834E8fd5eAcbd86b9aA2
OwnershipFacet deployed to: 0x9f34eCc82405Dc4eb220B46FA70Bfba5AfA802BF
ChangeRewardsFacet deployed to: 0xe915D9dc6FBdEe48FDEa4F832C69Dc283588bA61
KernelFacet deployed at: 0xa6bE5520c1d2f443E346B93330F55dC7Cfb23b9B
-----
Kernel deployed at: 0xD2c83AB0bee469ab5853c1e60bf8B663094EDca5
Rewards deployed at: 0xe4eD7DBF867c4C3Dd24D31Dc55F4A475634a5851

Rinkeby

DiamondCutFacet deployed to: 0xD4440dC5A06182f0e936C3a1B2472b3F16E29f62
DiamondLoupeFacet deployed to: 0xC550FAcBB8E2C4483aa0f84774b2C2E06e38f958
OwnershipFacet deployed to: 0x1B2D2C069fCF035d865E439Bb1B5584524FD87ce
ChangeRewardsFacet deployed to: 0x01C7224D42De4b11451E8BfBE721ccaFe79fe1c5
KernelFacet deployed at: 0x6A1819f39596ADd71F22c0777B161f278DFc882a
-----
Kernel deployed at: 0x48fc1fc9F88fdc98302E40aF50B32B06dDeB7713
Rewards deployed at: 0x9778409eF13D797F9218dC71bcfc368976D47B5d

Discussion

For any concerns with the platform, open an issue on GitHub.