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November 10, 2021 20:56
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| // SPDX-License-Identifier: AGPL-3.0-or-later | |
| pragma solidity ^0.8.7; | |
| import { ERC20Helper } from "../modules/erc20-helper/src/ERC20Helper.sol"; | |
| import { MapleProxied } from "../modules/maple-proxy-factory/contracts/MapleProxied.sol"; | |
| import { IMapleLoan } from "./interfaces/IMapleLoan.sol"; | |
| contract MapleBorrowerInternals is MapleProxied { | |
| address internal _owner; | |
| address internal _pendingOwner; | |
| /*************************/ | |
| /*** General Functions ***/ | |
| /*************************/ | |
| function _initialize(address owner_) internal { | |
| _owner = owner_; | |
| } | |
| /*************************/ | |
| /*** Ownable Functions ***/ | |
| /*************************/ | |
| modifier onlyOwner() { | |
| require(msg.sender == _owner, "MBI:NOT_OWNER"); | |
| _; | |
| } | |
| /************************/ | |
| /*** Borrow Functions ***/ | |
| /************************/ | |
| function _drawdownFunds(address loan_, uint256 amount_, address destination_) internal { | |
| _postCollateralForDrawdown(loan_, amount_); | |
| IMapleLoan(loan_).drawdownFunds(amount_, destination_); | |
| } | |
| function _makePayment(address loan_) internal { | |
| ( uint256 principal, uint256 interest ) = IMapleLoan(loan_).getNextPaymentBreakdown(); | |
| uint256 total = principal + interest; | |
| uint256 drawableFunds = IMapleLoan(loan_).drawableFunds(); | |
| require( | |
| total <= drawableFunds || ERC20Helper.transferFrom(IMapleLoan(loan_).fundsAsset(), msg.sender, loan_, total - drawableFunds), | |
| "MBI:MP:TRANSFER_FAILED" | |
| ); | |
| IMapleLoan(loan_).makePayment(uint256(0)); | |
| } | |
| function _makePayments(address loan_, uint256 numberOfPayments_) internal { | |
| while (numberOfPayments_-- > 0) { | |
| _makePayment(loan_); | |
| } | |
| } | |
| function _makePaymentsWithCutoff(address loan_, uint256 cutoffDate_) internal returns (bool hasPaymentsWithinCutoff_) { | |
| uint256 nextPaymentDueDate = IMapleLoan(loan_).nextPaymentDueDate(); | |
| if (nextPaymentDueDate > cutoffDate_) return false; | |
| uint256 paymentToMake = 1 + ((cutoffDate_ - nextPaymentDueDate) / IMapleLoan(loan_).paymentInterval()); | |
| uint256 paymentsRemaining = IMapleLoan(loan_).paymentsRemaining(); | |
| _makePayments(loan_, paymentToMake < paymentsRemaining ? paymentToMake : paymentsRemaining); | |
| return true; | |
| } | |
| function _postCollateral(address loan_, uint256 amount_) internal { | |
| require(ERC20Helper.transferFrom(IMapleLoan(loan_).collateralAsset(), msg.sender, loan_, amount_), "MBI:PC:TRANSFER_FAILED"); | |
| IMapleLoan(loan_).postCollateral(uint256(0)); | |
| } | |
| function _postCollateralForDrawdown(address loan_, uint256 drawdownAmount_) internal returns (bool additionalCollateralNecessary_) { | |
| uint256 collateral = IMapleLoan(loan_).getAdditionalCollateralRequiredFor(drawdownAmount_); | |
| if (collateral == uint256(0)) return false; | |
| _postCollateral(loan_, collateral); | |
| return true; | |
| } | |
| function _proposeNewTerms(address loan_, address refinancer_, bytes[] calldata calls_) internal { | |
| IMapleLoan(loan_).proposeNewTerms(refinancer_, calls_); | |
| } | |
| function _removeExcessCollateral(address loan_, address destination_) internal returns (bool hasExcessCollateral_) { | |
| uint256 collateral = IMapleLoan(loan_).excessCollateral(); | |
| if (collateral == uint256(0)) return false; | |
| _removeCollateral(loan_, collateral, destination_); | |
| return true; | |
| } | |
| function _removeCollateral(address loan_, uint256 amount_, address destination_) internal { | |
| IMapleLoan(loan_).removeCollateral(amount_, destination_); | |
| } | |
| function _returnFunds(address loan_, uint256 amount_) internal { | |
| require(ERC20Helper.transferFrom(IMapleLoan(loan_).fundsAsset(), msg.sender, loan_, amount_), "MBI:RF:TRANSFER_FAILED"); | |
| IMapleLoan(loan_).returnFunds(uint256(0)); | |
| } | |
| function _returnFundsAndRemoveExcessCollateral(address loan_, uint256 amount_, address destination_) internal returns (bool hasExcessCollateral_) { | |
| _returnFunds(loan_, amount_); | |
| return _removeExcessCollateral(loan_, destination_); | |
| } | |
| function _setBorrower(address loan_, address borrower_) internal { | |
| IMapleLoan(loan_).setBorrower(borrower_); | |
| } | |
| function _upgradeLoan(address loans_, uint256 toVersions_, bytes calldata arguments_) internal { | |
| IMapleLoan(loans_).upgrade(toVersions_, arguments_); | |
| } | |
| } |
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