Feature: Liquidity Pool (#19)

* Add liquidity pool

* Fix lint

* Cleanup

* Fix typo

* Fix typo

* Fix test

* Refactor deployment

* Remove withdrawAll

* Add nonce and deadline to MPC signature

* Make deployable to testnets

* Borrow and repay collateral

* Try to repay before deposit

* Fix typo in _checkTokenLTV

* Remove unnecessary condition

* Fix ltv calculation

* Add sign-borrow task

* Add set default LTV task

* Set default ltv in task to 20%

* Fix default borrow task

* Cleanup

* Fix warnings

* Add upgrade liquidity pool script

* Update withdrawProfit

* Fix lint

* Cleanup, refactor, fix solhint, add tasks

* Fix withdrawProfit, cleanup

* Fix lint

* Check that collateral is supported

* Add set-routes tasks and deploy arbitrum sepolia commands

---------

Co-authored-by: Oleksii Matiiasevych <oleksii@chainsafe.io>

Author: viatrix

.env.example

@@ -1,16 +1,41 @@
 # Contracts admin.
 ADMIN=
-# Rebalance caller.
-REBALANCE_CALLER=
+# Address that can increase/decerease LP conversion rate.
+ADJUSTER=
 # Deposits to Liquidity Hub are only allowed till this limit is reached.
 ASSETS_LIMIT=
 # Liquidity mining tiers. Multiplier will be divided by 100. So 175 will result in 1.75x.
 # There is no limit to the number of tiers, but has to be atleast one.
-TIER_1_DAYS=90
-TIER_1_MULTIPLIER=100
-TIER_2_DAYS=180
-TIER_2_MULTIPLIER=150
-TIER_3_DAYS=360
-TIER_3_MULTIPLIER=200
-BASE_SEPOLIA_PRIVATE_KEY=
+TIER_1_SECONDS=7776000
+TIER_1_MULTIPLIER=30
+TIER_2_SECONDS=15552000
+TIER_2_MULTIPLIER=80
+TIER_3_SECONDS=31104000
+TIER_3_MULTIPLIER=170
+# Rebalance caller.
+REBALANCE_CALLER=
+# Liquidity Pool parameters.
+# Value 500 will result in health factor 5.
+MIN_HEALTH_FACTOR=500
+# Value 20 will result in LTV 20%.
+DEFAULT_LTV=20
+MPC_ADDRESS=
+WITHDRAW_PROFIT=
+# General deployment parameters.
+DEPLOYER_PRIVATE_KEY=
 VERIFY=false
+BASE_SEPOLIA_RPC=
+ETHEREUM_SEPOLIA_RPC=
+ARBITRUM_SEPOLIA_RPC=
+ETHERSCAN_BASE_SEPOLIA=
+ETHERSCAN_ETHEREUM_SEPOLIA=
+ETHERSCAN_ARBITRUM_SEPOLIA=
+# Upgrade and configuration update parameters.
+LIQUIDITY_POOL=
+REBALANCER=
+# Testing parameters.
+FORK_PROVIDER=https://eth-mainnet.public.blastapi.io
+USDC_OWNER_ADDRESS=0x7713974908Be4BEd47172370115e8b1219F4A5f0
+RPL_OWNER_ADDRESS=0xdC7b28976d6eb13082a5Be7C66f9dCFE0115738f
+UNI_OWNER_ADDRESS=0x46f34C24A7bA7a2Ac6DD76c3F09B32D41C144d08
+PRIME_OWNER_ADDRESS=0x1D0065D367DA1919cD597d25F91a97B6039428C5

.solhint.json

@@ -1,9 +1,11 @@
 {
   "extends": "solhint:recommended",
   "rules": {
-    "max-line-length": ["off", 120],
+    "max-line-length": ["warn", 120],
     "func-visibility": ["warn", {"ignoreConstructors": true}],
     "func-name-mixedcase": ["off"],
-    "one-contract-per-file": ["off"]
+    "one-contract-per-file": ["off"],
+    "no-inline-assembly": ["off"],
+    "avoid-low-level-calls": ["off"]
   }
 }

contracts/Deps.sol

@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: LGPL-3.0-only
 pragma solidity 0.8.28;
 
-import { TransparentUpgradeableProxy } from '@openzeppelin/contracts/proxy/transparent/TransparentUpgradeableProxy.sol';
+/* solhint-disable no-unused-import */
+import {TransparentUpgradeableProxy} from "@openzeppelin/contracts/proxy/transparent/TransparentUpgradeableProxy.sol";

contracts/LiquidityHub.sol

@@ -10,11 +10,11 @@ import {
     Math
 } from "@openzeppelin/contracts-upgradeable/token/ERC20/extensions/ERC4626Upgradeable.sol";
 import {IERC20Permit} from "@openzeppelin/contracts/token/ERC20/extensions/IERC20Permit.sol";
-import {AccessControlUpgradeable} from '@openzeppelin/contracts-upgradeable/access/AccessControlUpgradeable.sol';
-import {ERC7201Helper} from './utils/ERC7201Helper.sol';
-import {IManagedToken} from './interfaces/IManagedToken.sol';
-import {ILiquidityPool} from './interfaces/ILiquidityPool.sol';
-import {ILiquidityHub} from './interfaces/ILiquidityHub.sol';
+import {AccessControlUpgradeable} from "@openzeppelin/contracts-upgradeable/access/AccessControlUpgradeable.sol";
+import {ERC7201Helper} from "./utils/ERC7201Helper.sol";
+import {IManagedToken} from "./interfaces/IManagedToken.sol";
+import {ILiquidityPool} from "./interfaces/ILiquidityPool.sol";
+import {ILiquidityHub} from "./interfaces/ILiquidityHub.sol";
 
 contract LiquidityHub is ILiquidityHub, ERC4626Upgradeable, AccessControlUpgradeable {
     using Math for uint256;
@@ -37,12 +37,12 @@ contract LiquidityHub is ILiquidityHub, ERC4626Upgradeable, AccessControlUpgrade
         uint256 assetsLimit;
     }
 
-    bytes32 private constant StorageLocation = 0xb877bfaae1674461dd1960c90f24075e3de3265a91f6906fe128ab8da6ba1700;
+    bytes32 private constant STORAGE_LOCATION = 0xb877bfaae1674461dd1960c90f24075e3de3265a91f6906fe128ab8da6ba1700;
 
     constructor(address shares, address liquidityPool) {
         ERC7201Helper.validateStorageLocation(
-            StorageLocation,
-            'sprinter.storage.LiquidityHub'
+            STORAGE_LOCATION,
+            "sprinter.storage.LiquidityHub"
         );
         if (shares == address(0)) revert ZeroAddress();
         if (liquidityPool == address(0)) revert ZeroAddress();
@@ -251,7 +251,7 @@ contract LiquidityHub is ILiquidityHub, ERC4626Upgradeable, AccessControlUpgrade
 
     function _getStorage() private pure returns (LiquidityHubStorage storage $) {
         assembly {
-            $.slot := StorageLocation
+            $.slot := STORAGE_LOCATION
         }
     }
 }

contracts/LiquidityMining.sol

@@ -4,7 +4,6 @@ pragma solidity 0.8.28;
 import {ERC20, IERC20} from "@openzeppelin/contracts/token/ERC20/ERC20.sol";
 import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
 import {IERC20Permit} from "@openzeppelin/contracts/token/ERC20/extensions/IERC20Permit.sol";
-import {Math} from "@openzeppelin/contracts/utils/math/Math.sol";
 import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
 
 contract LiquidityMining is ERC20, Ownable {