mirror of
https://github.com/Instadapp/dsa-connectors.git
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111 lines
3.3 KiB
Solidity
111 lines
3.3 KiB
Solidity
//SPDX-License-Identifier: MIT
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pragma solidity ^0.7.6;
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import { DSMath } from "../../common/math.sol";
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import { Basic } from "../../common/basic.sol";
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import { TokenInterface } from "../../common/interfaces.sol";
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import { ISavingsContractV2, IBoostedSavingsVault } from "./interface.sol";
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abstract contract Helpers is DSMath, Basic {
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address internal constant mUsdToken =
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0xe2f2a5C287993345a840Db3B0845fbC70f5935a5;
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address internal constant imUsdToken =
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0x30647a72Dc82d7Fbb1123EA74716aB8A317Eac19;
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address internal constant imUsdVault =
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0x78BefCa7de27d07DC6e71da295Cc2946681A6c7B;
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/***************************************
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Internal
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****************************************/
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/**
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* @dev Deposit to Save from any asset
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* @notice Called internally from deposit functions
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* @param _token Address of token to deposit
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* @param _amount Amount of token to deposit
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* @param _path Path to mint mUSD (only needed for Feeder Pool)
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* @param _stake stake token in Vault?
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* @return _eventName Event name
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* @return _eventParam Event parameters
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*/
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function _deposit(
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address _token,
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uint256 _amount,
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address _path,
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bool _stake
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) internal returns (string memory _eventName, bytes memory _eventParam) {
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// 1. Deposit mUSD to Save
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approve(TokenInterface(mUsdToken), imUsdToken, _amount);
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uint256 credits = ISavingsContractV2(imUsdToken).depositSavings(
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_amount
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);
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if (_stake) {
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// 2. Stake imUSD to Vault
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approve(TokenInterface(imUsdToken), imUsdVault, credits);
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IBoostedSavingsVault(imUsdVault).stake(credits);
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}
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// 3. Log Events
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_eventName = "LogDeposit(address,uint256,address,bool)";
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_eventParam = abi.encode(_token, _amount, _path, _stake);
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}
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/**
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* @dev Withdraws from Save
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* @notice Withdraws token supported by mStable from Save
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* @param _credits Credits to withdraw
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* @param _unstake unstake from Vault?
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* @return amountWithdrawn Amount withdrawn in mUSD
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*/
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function _withdraw(uint256 _credits, bool _unstake)
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internal
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returns (uint256 amountWithdrawn)
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{
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uint256 credits;
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// 1. Withdraw from Vault
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if (_unstake) {
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credits = _credits == uint256(-1)
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? TokenInterface(imUsdVault).balanceOf(address(this))
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: _credits;
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IBoostedSavingsVault(imUsdVault).withdraw(credits);
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}
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// 2. Withdraw from Save
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credits = _credits == uint256(-1)
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? TokenInterface(imUsdToken).balanceOf(address(this))
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: _credits;
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approve(TokenInterface(imUsdToken), imUsdVault, _credits);
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amountWithdrawn = ISavingsContractV2(imUsdToken).redeemCredits(credits);
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}
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/**
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* @dev Returns the reward tokens
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* @notice Gets the reward tokens from the vault contract
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* @return rewardToken Address of reward token
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*/
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function _getRewardTokens() internal view returns (address rewardToken) {
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rewardToken = address(
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IBoostedSavingsVault(imUsdVault).getRewardToken()
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);
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}
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/**
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* @dev Returns the internal balances of the rewardToken and platformToken
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* @notice Gets current balances of rewardToken and platformToken, used for calculating rewards accrued
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* @param _rewardToken Address of reward token
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* @return a Amount of reward token
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*/
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function _getRewardInternalBal(address _rewardToken)
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internal
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view
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returns (uint256 a)
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{
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a = TokenInterface(_rewardToken).balanceOf(address(this));
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}
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}
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