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https://github.com/madfish-solutions/yupana-protocol-core
Open-source lending protocol built on top of Tezos blockchain
https://github.com/madfish-solutions/yupana-protocol-core
blockchain defi tezos
Last synced: about 2 months ago
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Open-source lending protocol built on top of Tezos blockchain
- Host: GitHub
- URL: https://github.com/madfish-solutions/yupana-protocol-core
- Owner: madfish-solutions
- Created: 2020-11-19T11:45:05.000Z (almost 4 years ago)
- Default Branch: master
- Last Pushed: 2023-12-20T11:18:53.000Z (9 months ago)
- Last Synced: 2024-06-13T21:41:36.949Z (3 months ago)
- Topics: blockchain, defi, tezos
- Language: JavaScript
- Homepage:
- Size: 1.32 MB
- Stars: 8
- Watchers: 3
- Forks: 4
- Open Issues: 3
-
Metadata Files:
- Readme: README.md
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README
# Yupana protocol
# Description
**Yupana Protocol** is a decentralized lending protocol for individuals and protocols to access financial services. The protocol is permissionless, transparent, and non-custodial.
*Yupana Protocol contracts are under development. In this repository, you can follow the development and changes.*
# Architecture
1. `YToken` - Core contract than manages all markets and implements FA2 interface for yToken for each collateral provided;
2. `PriceFeedProxy` - Proxy that allows to request the price from real oracle;
3. `InterestRate` - Providers methods to calculate supply, borrow, utilization rate.
# Project structure
```
.
.
├── contracts/ # contracts
├────────── main/ # the contracts to be compiled
├─────────────────── yToken
├─────────────────── interestRate
├─────────────────── priceFeed
├────────── partial/ # the code parts imported by main contracts
├─────────────────── interestRate/
├───────────────────────── interestRateMethods
├───────────────────────── interestRateTypes
├─────────────────── proxy/
├───────────────────────── priceFeedMethods
├───────────────────────── priceFeedTypes
├─────────────────── yToken/
├───────────────────────── adminMethods
├───────────────────────── fa2Methods
├───────────────────────── fa2Types
├───────────────────────── lendingMethods
├─────────────────────────lendingTypes
├───────────────────────── wrapTransfer
├─────────────────── mainTypes
├── migrations/
├── scripts/ # cli for account actions
├── storage/ # initial storage for contract originations
├── test/ # test cases
├── README.md # current file
└── .gitignore
```
# Glossary
**Underlying asset** is the real asset that is provided to the lending protocol.
**yToken token is** the single token with the specific token id inside of the core Yupana FA2; represents specific underlying asset locked in the protocol.
**Collateral** is the yToken token that can be used as the collateral to take the loan.
**Borrow** is the amount of the underlying asset borrowed by the user(loan).
**Cash** is the amount of the underlying asset present on the contract(not borrowed).
**Reserves** is the amount of the underlying asset stored in the protocol.
**Collateral Factor** is the rate represents by which the borrow limit increases if the yToken is minted.
**Close Factor** is the max portion of the loan that can be liquidated per single transaction.
**Reserve Factor** is the rate that represents what part of the interest goes to the protocol reserves.
**Liquidation discount** is the rate that the liquidator will earn if liquidate the asset.
# Contracts
## PriceFeedProxy
- The `getPrice(asset_name)` :
- can only be called by the **yToken** and otherwise, the transaction fails
- requests the price from the **Price Feed** and expects the response on the `receivePrice` entrypoint.
- The `receivePrice`:
- can only be called by the **Price Feed**.
- the response is processed and the price is sent to the **yToken** contract.
- The `receivePrice` can only be called if the `getPrice` has been called just before in the same operation(prevent unexpected entrance and reentrancy); the `entered` flag can be used.
### Entrypoints
- getPrice - asks for a price from Oracle.
- receivePrice - sends the price from Oracle to the `yToken` contract.
## InterestRate
- The contract has the followed 3 entrypoints that can be called by anyone with the result send to arbitrary contract: `getBorrowRate(borrows, cash, reserves)`, `getSupplyRate(borrows, cash, reserves)`, `getUtilizationRate(borrows, cash, reserves)`.
### Entrypoints
- getBorrowRate - sends a callback with the counted BorrowRate.
- getSupplyRate - sends a callback with the counted SupplyRate.
- getUtilizationRate - sends a callback with the counted UtilizationRate.
## YToken
### Entrypoints
- mint - is a function to add a token as a collateral. It allows you to add a token to our system.
- redeem - the function is designed to withdraw tokens from the platform.
- borrow - a function for borrowing a token. Implemented the logic of freezing collateral tokens when borrowing a token.
- repay - a function designed to repay debt.
- liquidate - the function allows another user to liquidate someone's debt.
- enterMarket - allows you to designate that this token will be used as collateral.
- exitMarket - allows you to indicate that this token is no longer used as collateral.
# Quick Start
To compile and deploy contracts to network:
0. run `yarn`
1. compile contract `yarn compile`
2. deploy contract to chain
- mainnet: `yarn migrate`
- hangzhounet: `yarn migrate-hang`
- granadanet: `yarn migrate-gra`
# Testing
Run: `yarn test`