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Test_OCC_Modular.sol
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// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.17;
import "../Utility/Utility.sol";
import "../../lib/zivoe-core-foundry/src/lockers/OCC/OCC_Modular.sol";
import "../../lib/zivoe-core-foundry/src/lockers/OCT/OCT_YDL.sol";
contract Test_OCC_Modular is Utility {
OCC_Modular OCC_Modular_DAI;
OCC_Modular OCC_Modular_FRAX;
OCC_Modular OCC_Modular_USDC;
OCC_Modular OCC_Modular_USDT;
OCT_YDL Treasury;
uint32[5] options = [86400 * 7, 86400 * 14, 86400 * 28, 86400 * 91, 86400 * 364];
struct Combine {
uint256[] loans; /// @dev The loans approved for combination.
uint256 paymentInterval; /// @dev The paymentInterval of the resulting combined loan.
uint256 term; /// @dev The term of the resulting combined loan.
uint256 expires; /// @dev The expiration of this combination.
int8 paymentSchedule; /// @dev The paymentSchedule of the resulting combined loan.
bool valid; /// @dev The validity of the combination (if it can be executed).
}
function setUp() public {
deployCore(false);
Treasury = new OCT_YDL(address(DAO), address(GBL));
// Initialize and whitelist OCC_Modular lockers.
OCC_Modular_DAI = new OCC_Modular(address(DAO), address(DAI), address(GBL), address(roy), address(Treasury));
OCC_Modular_FRAX = new OCC_Modular(address(DAO), address(FRAX), address(GBL), address(roy), address(Treasury));
OCC_Modular_USDC = new OCC_Modular(address(DAO), address(USDC), address(GBL), address(roy), address(Treasury));
OCC_Modular_USDT = new OCC_Modular(address(DAO), address(USDT), address(GBL), address(roy), address(Treasury));
zvl.try_updateIsLocker(address(GBL), address(Treasury), true);
zvl.try_updateIsLocker(address(GBL), address(OCC_Modular_DAI), true);
zvl.try_updateIsLocker(address(GBL), address(OCC_Modular_FRAX), true);
zvl.try_updateIsLocker(address(GBL), address(OCC_Modular_USDC), true);
zvl.try_updateIsLocker(address(GBL), address(OCC_Modular_USDT), true);
deal(DAI, address(OCC_Modular_DAI), 100_000_000_000_000_000_000 ether);
deal(FRAX, address(OCC_Modular_FRAX), 100_000_000_000_000_000_000 ether);
deal(USDC, address(OCC_Modular_USDC), 100_000_000_000_000_000_000 ether);
deal(USDT, address(OCC_Modular_USDT), 100_000_000_000_000_000_000 ether);
}
// ------------
// Events
// ------------
event CombineApplied(
address indexed borrower,
uint256[] loanIDs,
uint256 term,
uint256 paymentInterval,
uint256 gracePeriod,
int8 indexed paymentSchedule
);
event CombineApproved(
uint256 indexed id,
uint256[] loanIDs,
uint256 APRLateFee,
uint256 term,
uint256 paymentInterval,
uint256 gracePeriod,
uint256 expires,
int8 indexed paymentSchedule
);
event CombineUnapproved(uint id);
event CombineLoanCreated(
address indexed borrower,
uint256 indexed id,
uint256 borrowAmount,
uint256 APR,
uint256 APRLateFee,
uint256 paymentDueBy,
uint256 term,
uint256 paymentInterval,
uint256 gracePeriod,
int8 indexed paymentSchedule
);
event ConversionToAmortizationApplied(uint indexed id);
event ConversionToAmortizationApproved(uint indexed id);
event ConversionToAmortizationUnapproved(uint indexed id);
event ConversionToBulletApplied(uint indexed id);
event ConversionToBulletApproved(uint indexed id);
event ConversionToBulletUnapproved(uint indexed id);
event DefaultMarked(uint256 indexed id, uint256 principalDefaulted);
event DefaultResolved(uint256 indexed id, uint256 amount, address indexed payee, bool resolved);
event ExtensionApplied(uint indexed id, uint intervals);
event ExtensionApproved(uint indexed id, uint intervals);
event ExtensionUnapproved(uint indexed id);
event LoanCalled(uint256 indexed id, uint256 amount, uint256 principal, uint256 interest, uint256 lateFee);
event InterestSupplied(uint256 indexed id, uint256 amount, address indexed payee);
event UpdatedOCTYDL(address indexed newOCT, address indexed oldOCT);
event OfferAccepted(uint256 indexed id, uint256 principal, address indexed borrower, uint256 paymentDueBy);
event OfferCancelled(uint256 indexed id);
event OfferCreated(
address indexed borrower,
uint256 indexed id,
uint256 borrowAmount,
uint256 APR,
uint256 APRLateFee,
uint256 term,
uint256 paymentInterval,
uint256 offerExpiry,
uint256 gracePeriod,
int8 indexed paymentSchedule
);
event PaymentMade(uint256 indexed id, address indexed payee, uint256 amount, uint256 principal, uint256 interest, uint256 lateFee, uint256 nextPaymentDue);
event RefinanceApproved(uint indexed id, uint APR);
event RefinanceUnapproved(uint indexed id);
event RefinanceApplied(uint indexed id, uint APRNew, uint APRPrior);
event RepaidMarked(uint256 indexed id);
// ----------------------
// Helper Functions
// ----------------------
function createRandomOffer(uint96 random, bool choice, address asset) internal returns (uint256 loanID) {
uint256 borrowAmount = uint256(random) + 1;
uint256 APR = uint256(random) % 5000;
uint256 APRLateFee = uint256(random) % 5000;
uint256 term = uint256(random) % 25 + 1;
uint256 gracePeriod = uint256(random) % 90 days + 7 days;
uint256 option = uint256(random) % 5;
int8 paymentSchedule = choice ? int8(0) : int8(1);
if (asset == DAI) {
loanID = OCC_Modular_DAI.loanCounter();
assert(roy.try_createOffer(
address(OCC_Modular_DAI),
address(tim),
borrowAmount,
APR,
APRLateFee,
term,
uint256(options[option]),
gracePeriod,
paymentSchedule
));
}
else if (asset == FRAX) {
loanID = OCC_Modular_FRAX.loanCounter();
assert(roy.try_createOffer(
address(OCC_Modular_FRAX),
address(tim),
borrowAmount,
APR,
APRLateFee,
term,
uint256(options[option]),
gracePeriod,
paymentSchedule
));
}
else if (asset == USDC) {
loanID = OCC_Modular_USDC.loanCounter();
assert(roy.try_createOffer(
address(OCC_Modular_USDC),
address(tim),
borrowAmount,
APR,
APRLateFee,
term,
uint256(options[option]),
gracePeriod,
paymentSchedule
));
}
else if (asset == USDT) {
loanID = OCC_Modular_USDT.loanCounter();
assert(roy.try_createOffer(
address(OCC_Modular_USDT),
address(tim),
borrowAmount,
APR,
APRLateFee,
term,
uint256(options[option]),
gracePeriod,
paymentSchedule
));
}
else { revert(); }
}
function tim_acceptOffer(uint256 loanID, address asset) public {
if (asset == DAI) {
assert(tim.try_acceptOffer(address(OCC_Modular_DAI), loanID));
}
else if (asset == FRAX) {
assert(tim.try_acceptOffer(address(OCC_Modular_FRAX), loanID));
}
else if (asset == USDC) {
assert(tim.try_acceptOffer(address(OCC_Modular_USDC), loanID));
}
else if (asset == USDT) {
assert(tim.try_acceptOffer(address(OCC_Modular_USDT), loanID));
}
else { revert(); }
}
function simulateITO_and_createOffers(
uint96 random, bool choice
) public returns (
uint256 _loanID_DAI,
uint256 _loanID_FRAX,
uint256 _loanID_USDC,
uint256 _loanID_USDT
) {
uint256 amount = uint256(random);
simulateITO(amount * WAD, amount * WAD, amount * USD, amount * USD);
assert(god.try_push(address(DAO), address(OCC_Modular_DAI), DAI, amount, ""));
assert(god.try_push(address(DAO), address(OCC_Modular_FRAX), FRAX, amount, ""));
assert(god.try_push(address(DAO), address(OCC_Modular_USDC), USDC, amount, ""));
assert(god.try_push(address(DAO), address(OCC_Modular_USDT), USDT, amount, ""));
_loanID_DAI = createRandomOffer(random, choice, DAI);
_loanID_FRAX = createRandomOffer(random, choice, FRAX);
_loanID_USDC = createRandomOffer(random, choice, USDC);
_loanID_USDT = createRandomOffer(random, choice, USDT);
}
function simulateITO_and_createOffers_and_acceptOffers(
uint96 random, bool choice
) public returns (
uint256 _loanID_DAI,
uint256 _loanID_FRAX,
uint256 _loanID_USDC,
uint256 _loanID_USDT
) {
uint256 amount = uint256(random);
simulateITO(amount * WAD, amount * WAD, amount * USD, amount * USD);
assert(god.try_push(address(DAO), address(OCC_Modular_DAI), DAI, amount, ""));
assert(god.try_push(address(DAO), address(OCC_Modular_FRAX), FRAX, amount, ""));
assert(god.try_push(address(DAO), address(OCC_Modular_USDC), USDC, amount, ""));
assert(god.try_push(address(DAO), address(OCC_Modular_USDT), USDT, amount, ""));
_loanID_DAI = createRandomOffer(random, choice, DAI);
_loanID_FRAX = createRandomOffer(random, choice, FRAX);
_loanID_USDC = createRandomOffer(random, choice, USDC);
_loanID_USDT = createRandomOffer(random, choice, USDT);
assert(tim.try_acceptOffer(address(OCC_Modular_DAI), _loanID_DAI));
assert(tim.try_acceptOffer(address(OCC_Modular_FRAX), _loanID_FRAX));
assert(tim.try_acceptOffer(address(OCC_Modular_USDC), _loanID_USDC));
assert(tim.try_acceptOffer(address(OCC_Modular_USDT), _loanID_USDT));
// // Mint borrower tokens for paying interest, or other purposes.
mint("DAI", address(tim), MAX_UINT / 10**18);
mint("FRAX", address(tim), MAX_UINT / 10**18);
mint("USDC", address(tim), MAX_UINT / 10**18);
mint("USDT", address(tim), MAX_UINT / 10**18);
// // Handle pre-approvals here for future convenience.
assert(tim.try_approveToken(address(DAI), address(OCC_Modular_DAI), MAX_UINT / 10**18));
assert(tim.try_approveToken(address(FRAX), address(OCC_Modular_FRAX), MAX_UINT / 10**18));
assert(tim.try_approveToken(address(USDC), address(OCC_Modular_USDC), MAX_UINT / 10**18));
assert(tim.try_approveToken(address(USDT), address(OCC_Modular_USDT), MAX_UINT / 10**18));
}
function createOffers_and_acceptOffers(
uint96 random, bool choice
) public returns (
uint256 _loanID_DAI,
uint256 _loanID_FRAX,
uint256 _loanID_USDC,
uint256 _loanID_USDT
) {
_loanID_DAI = createRandomOffer(random, choice, DAI);
_loanID_FRAX = createRandomOffer(random, choice, FRAX);
_loanID_USDC = createRandomOffer(random, choice, USDC);
_loanID_USDT = createRandomOffer(random, choice, USDT);
assert(tim.try_acceptOffer(address(OCC_Modular_DAI), _loanID_DAI));
assert(tim.try_acceptOffer(address(OCC_Modular_FRAX), _loanID_FRAX));
assert(tim.try_acceptOffer(address(OCC_Modular_USDC), _loanID_USDC));
assert(tim.try_acceptOffer(address(OCC_Modular_USDT), _loanID_USDT));
// Mint borrower tokens for paying interest, or other purposes.
mint("DAI", address(tim), MAX_UINT / 100);
mint("FRAX", address(tim), MAX_UINT / 100);
mint("USDC", address(tim), MAX_UINT / 100);
mint("USDT", address(tim), MAX_UINT / 100);
// Handle pre-approvals here for future convenience.
assert(tim.try_approveToken(address(DAI), address(OCC_Modular_DAI), MAX_UINT / 100));
assert(tim.try_approveToken(address(FRAX), address(OCC_Modular_FRAX), MAX_UINT / 100));
assert(tim.try_approveToken(address(USDC), address(OCC_Modular_USDC), MAX_UINT / 100));
assert(tim.try_approveToken(address(USDT), address(OCC_Modular_USDT), MAX_UINT / 100));
}
function simulateITO_and_createOffers_and_acceptOffers_and_defaultLoans(
uint96 random, bool choice
) public returns (
uint256 _loanID_DAI,
uint256 _loanID_FRAX,
uint256 _loanID_USDC,
uint256 _loanID_USDT
) {
uint256 amount = uint256(random);
simulateITO(amount * WAD, amount * WAD, amount * USD, amount * USD);
assert(god.try_push(address(DAO), address(OCC_Modular_DAI), DAI, amount, ""));
assert(god.try_push(address(DAO), address(OCC_Modular_FRAX), FRAX, amount, ""));
assert(god.try_push(address(DAO), address(OCC_Modular_USDC), USDC, amount, ""));
assert(god.try_push(address(DAO), address(OCC_Modular_USDT), USDT, amount, ""));
_loanID_DAI = createRandomOffer(random, choice, DAI);
_loanID_FRAX = createRandomOffer(random, choice, FRAX);
_loanID_USDC = createRandomOffer(random, choice, USDC);
_loanID_USDT = createRandomOffer(random, choice, USDT);
assert(tim.try_acceptOffer(address(OCC_Modular_DAI), _loanID_DAI));
assert(tim.try_acceptOffer(address(OCC_Modular_FRAX), _loanID_FRAX));
assert(tim.try_acceptOffer(address(OCC_Modular_USDC), _loanID_USDC));
assert(tim.try_acceptOffer(address(OCC_Modular_USDT), _loanID_USDT));
// Mint borrower tokens for paying interest, or other purposes.
mint("DAI", address(tim), MAX_UINT / 100);
mint("FRAX", address(tim), MAX_UINT / 100);
mint("USDC", address(tim), MAX_UINT / 100);
mint("USDT", address(tim), MAX_UINT / 100);
// Handle pre-approvals here for future convenience.
assert(tim.try_approveToken(address(DAI), address(OCC_Modular_DAI), MAX_UINT / 100));
assert(tim.try_approveToken(address(FRAX), address(OCC_Modular_FRAX), MAX_UINT / 100));
assert(tim.try_approveToken(address(USDC), address(OCC_Modular_USDC), MAX_UINT / 100));
assert(tim.try_approveToken(address(USDT), address(OCC_Modular_USDT), MAX_UINT / 100));
(,, uint256[10] memory loanInfo_DAI) = OCC_Modular_DAI.loanInfo(_loanID_DAI);
(,, uint256[10] memory loanInfo_FRAX) = OCC_Modular_FRAX.loanInfo(_loanID_FRAX);
(,, uint256[10] memory loanInfo_USDC) = OCC_Modular_USDC.loanInfo(_loanID_USDC);
(,, uint256[10] memory loanInfo_USDT) = OCC_Modular_USDT.loanInfo(_loanID_USDT);
hevm.warp(loanInfo_DAI[3] + loanInfo_DAI[8] + 1 seconds);
assert(roy.try_markDefault(address(OCC_Modular_DAI), _loanID_DAI));
hevm.warp(loanInfo_FRAX[3] + loanInfo_FRAX[8] + 1 seconds);
assert(roy.try_markDefault(address(OCC_Modular_FRAX), _loanID_FRAX));
hevm.warp(loanInfo_USDC[3] + loanInfo_USDC[8] + 1 seconds);
assert(roy.try_markDefault(address(OCC_Modular_USDC), _loanID_USDC));
hevm.warp(loanInfo_USDT[3] + loanInfo_USDT[8] + 1 seconds);
assert(roy.try_markDefault(address(OCC_Modular_USDT), _loanID_USDT));
}
function simulateITO_and_createOffers_and_acceptOffers_and_defaultLoans_and_resolveLoans(
uint96 random, bool choice
) public returns (
uint256 _loanID_DAI,
uint256 _loanID_FRAX,
uint256 _loanID_USDC,
uint256 _loanID_USDT
) {
uint256 amount = uint256(random);
simulateITO(amount * WAD, amount * WAD, amount * USD, amount * USD);
assert(god.try_push(address(DAO), address(OCC_Modular_DAI), DAI, amount, ""));
assert(god.try_push(address(DAO), address(OCC_Modular_FRAX), FRAX, amount, ""));
assert(god.try_push(address(DAO), address(OCC_Modular_USDC), USDC, amount, ""));
assert(god.try_push(address(DAO), address(OCC_Modular_USDT), USDT, amount, ""));
_loanID_DAI = createRandomOffer(random, choice, DAI);
_loanID_FRAX = createRandomOffer(random, choice, FRAX);
_loanID_USDC = createRandomOffer(random, choice, USDC);
_loanID_USDT = createRandomOffer(random, choice, USDT);
assert(tim.try_acceptOffer(address(OCC_Modular_DAI), _loanID_DAI));
assert(tim.try_acceptOffer(address(OCC_Modular_FRAX), _loanID_FRAX));
assert(tim.try_acceptOffer(address(OCC_Modular_USDC), _loanID_USDC));
assert(tim.try_acceptOffer(address(OCC_Modular_USDT), _loanID_USDT));
// Mint borrower tokens for paying interest, or other purposes.
mint("DAI", address(tim), MAX_UINT / 100);
mint("FRAX", address(tim), MAX_UINT / 100);
mint("USDC", address(tim), MAX_UINT / 100);
mint("USDT", address(tim), MAX_UINT / 100);
// Handle pre-approvals here for future convenience.
assert(tim.try_approveToken(address(DAI), address(OCC_Modular_DAI), MAX_UINT / 100));
assert(tim.try_approveToken(address(FRAX), address(OCC_Modular_FRAX), MAX_UINT / 100));
assert(tim.try_approveToken(address(USDC), address(OCC_Modular_USDC), MAX_UINT / 100));
assert(tim.try_approveToken(address(USDT), address(OCC_Modular_USDT), MAX_UINT / 100));
(,, uint256[10] memory loanInfo_DAI) = OCC_Modular_DAI.loanInfo(_loanID_DAI);
(,, uint256[10] memory loanInfo_FRAX) = OCC_Modular_FRAX.loanInfo(_loanID_FRAX);
(,, uint256[10] memory loanInfo_USDC) = OCC_Modular_USDC.loanInfo(_loanID_USDC);
(,, uint256[10] memory loanInfo_USDT) = OCC_Modular_USDT.loanInfo(_loanID_USDT);
hevm.warp(loanInfo_DAI[3] + loanInfo_DAI[8] + 1 seconds);
assert(roy.try_markDefault(address(OCC_Modular_DAI), _loanID_DAI));
hevm.warp(loanInfo_FRAX[3] + loanInfo_FRAX[8] + 1 seconds);
assert(roy.try_markDefault(address(OCC_Modular_FRAX), _loanID_FRAX));
hevm.warp(loanInfo_USDC[3] + loanInfo_USDC[8] + 1 seconds);
assert(roy.try_markDefault(address(OCC_Modular_USDC), _loanID_USDC));
hevm.warp(loanInfo_USDT[3] + loanInfo_USDT[8] + 1 seconds);
assert(roy.try_markDefault(address(OCC_Modular_USDT), _loanID_USDT));
assert(tim.try_resolveDefault(address(OCC_Modular_DAI), _loanID_DAI, loanInfo_DAI[0]));
assert(tim.try_resolveDefault(address(OCC_Modular_FRAX), _loanID_FRAX, loanInfo_DAI[0]));
assert(tim.try_resolveDefault(address(OCC_Modular_USDC), _loanID_USDC, loanInfo_DAI[0]));
assert(tim.try_resolveDefault(address(OCC_Modular_USDT), _loanID_USDT, loanInfo_DAI[0]));
}
// ----------------
// Unit Tests
// ----------------
// Validate initial state.
function test_OCC_Modular_init() public {
// Ownership.
assertEq(OCC_Modular_DAI.owner(), address(DAO));
assertEq(OCC_Modular_FRAX.owner(), address(DAO));
assertEq(OCC_Modular_USDC.owner(), address(DAO));
assertEq(OCC_Modular_USDT.owner(), address(DAO));
// State variables.
assertEq(OCC_Modular_DAI.stablecoin(), address(DAI));
assertEq(OCC_Modular_FRAX.stablecoin(), address(FRAX));
assertEq(OCC_Modular_USDC.stablecoin(), address(USDC));
assertEq(OCC_Modular_USDT.stablecoin(), address(USDT));
assertEq(OCC_Modular_DAI.GBL(), address(GBL));
assertEq(OCC_Modular_FRAX.GBL(), address(GBL));
assertEq(OCC_Modular_USDC.GBL(), address(GBL));
assertEq(OCC_Modular_USDT.GBL(), address(GBL));
assertEq(OCC_Modular_DAI.underwriter(), address(roy));
assertEq(OCC_Modular_FRAX.underwriter(), address(roy));
assertEq(OCC_Modular_USDC.underwriter(), address(roy));
assertEq(OCC_Modular_USDT.underwriter(), address(roy));
assert(OCC_Modular_DAI.canPush());
assert(OCC_Modular_FRAX.canPush());
assert(OCC_Modular_USDC.canPush());
assert(OCC_Modular_USDT.canPush());
assert(OCC_Modular_DAI.canPull());
assert(OCC_Modular_FRAX.canPull());
assert(OCC_Modular_USDC.canPull());
assert(OCC_Modular_USDT.canPull());
assert(OCC_Modular_DAI.canPullPartial());
assert(OCC_Modular_FRAX.canPullPartial());
assert(OCC_Modular_USDC.canPullPartial());
assert(OCC_Modular_USDT.canPullPartial());
}
// Validate acceptOffer() state changes.
// Validate acceptOffer() restrictions.
// This includes:
// - loans[id].state must be LoanState.Offered
// - block.timestamp must be before offerExpiry
// - _msgSender() must be borrower
function test_OCC_Modular_acceptOffer_restrictions_loanState(uint96 random, bool choice) public {
(
uint256 _loanID_DAI,,
uint256 _loanID_USDC,
) = simulateITO_and_createOffers(random, choice);
// Cancel two loan offers.
assert(roy.try_cancelOffer(address(OCC_Modular_DAI), _loanID_DAI));
assert(roy.try_cancelOffer(address(OCC_Modular_USDC), _loanID_USDC));
// Can't accept loan offer if state != LoanState.Offered.
hevm.startPrank(address(roy));
hevm.expectRevert("OCC_Modular::acceptOffer() loans[id].state != LoanState.Offered");
OCC_Modular_DAI.acceptOffer(_loanID_DAI);
hevm.stopPrank();
assert(!tim.try_acceptOffer(address(OCC_Modular_USDC), _loanID_USDC));
}
function test_OCC_Modular_acceptOffer_restrictions_expiry(uint96 random, bool choice) public {
(
uint256 _loanID_DAI,
uint256 _loanID_FRAX,
uint256 _loanID_USDC,
uint256 _loanID_USDT
) = simulateITO_and_createOffers(random, choice);
// Cancel two loan offers.
assert(roy.try_cancelOffer(address(OCC_Modular_DAI), _loanID_DAI));
assert(roy.try_cancelOffer(address(OCC_Modular_USDC), _loanID_USDC));
// Warp past expiry time (3 days past loan creation).
hevm.warp(block.timestamp + 3 days + 1 seconds);
// Can't accept loan offer loan if block.timestamp > loans[id].offerExpiry.
hevm.startPrank(address(roy));
hevm.expectRevert("OCC_Modular::acceptOffer() block.timestamp >= loans[id].offerExpiry");
OCC_Modular_FRAX.acceptOffer(_loanID_FRAX);
hevm.stopPrank();
assert(!tim.try_acceptOffer(address(OCC_Modular_USDT), _loanID_USDT));
}
function test_OCC_Modular_acceptOffer_restrictions_borrower(uint96 random, bool choice) public {
(
,
uint256 _loanID_FRAX,
,
) = simulateITO_and_createOffers(random, choice);
// Warp slightly ahead of time.
hevm.warp(block.timestamp + 1 days);
// Can't accept loan offer if _msgSender() != borrower
hevm.startPrank(address(roy));
hevm.expectRevert("OCC_Modular::acceptOffer() _msgSender() != loans[id].borrower");
OCC_Modular_FRAX.acceptOffer(_loanID_FRAX);
hevm.stopPrank();
}
function test_OCC_Modular_acceptOffer_state(uint96 random, bool choice) public {
(
uint256 _loanID_DAI,
uint256 _loanID_FRAX,
uint256 _loanID_USDC,
uint256 _loanID_USDT
) = simulateITO_and_createOffers(random, choice);
// Pre-state DAI.
uint256 _preStable_borrower = IERC20(DAI).balanceOf(address(tim));
uint256 _preStable_occ = IERC20(DAI).balanceOf(address(OCC_Modular_DAI));
(,, uint256[10] memory _preInfo) = OCC_Modular_DAI.loanInfo(_loanID_DAI);
hevm.expectEmit(true, true, false, true, address(OCC_Modular_DAI));
emit OfferAccepted(_loanID_DAI, _preInfo[0], address(tim), block.timestamp - block.timestamp % 7 days + 9 days + _preInfo[6]);
assert(tim.try_acceptOffer(address(OCC_Modular_DAI), _loanID_DAI));
// Post-state DAI.
(,, uint256[10] memory _postInfo) = OCC_Modular_DAI.loanInfo(_loanID_DAI);
uint256 _postStable_borrower = IERC20(DAI).balanceOf(address(tim));
uint256 _postStable_occ = IERC20(DAI).balanceOf(address(OCC_Modular_DAI));
// block.timestamp - block.timestamp % 7 days + 9 days + loans[id].paymentInterval
assertEq(_postInfo[3], block.timestamp - block.timestamp % 7 days + 9 days + _postInfo[6]);
assertEq(_postInfo[9], 2);
assertEq(_postStable_borrower - _preStable_borrower, _postInfo[0]);
assertEq(_preStable_occ - _postStable_occ, _postInfo[0]);
// Pre-state FRAX.
_preStable_borrower = IERC20(FRAX).balanceOf(address(tim));
_preStable_occ = IERC20(FRAX).balanceOf(address(OCC_Modular_FRAX));
(,, _preInfo) = OCC_Modular_DAI.loanInfo(_loanID_FRAX);
hevm.expectEmit(true, true, false, true, address(OCC_Modular_FRAX));
emit OfferAccepted(_loanID_FRAX, _preInfo[0], address(tim), block.timestamp - block.timestamp % 7 days + 9 days + _preInfo[6]);
assert(tim.try_acceptOffer(address(OCC_Modular_FRAX), _loanID_FRAX));
// Post-state FRAX
(,, _postInfo) = OCC_Modular_FRAX.loanInfo(_loanID_FRAX);
_postStable_borrower = IERC20(FRAX).balanceOf(address(tim));
_postStable_occ = IERC20(FRAX).balanceOf(address(OCC_Modular_FRAX));
assertEq(_postInfo[3], block.timestamp - block.timestamp % 7 days + 9 days + _postInfo[6]);
assertEq(_postInfo[9], 2);
assertEq(_postStable_borrower - _preStable_borrower, _postInfo[0]);
assertEq(_preStable_occ - _postStable_occ, _postInfo[0]);
// Pre-state USDC.
_preStable_borrower = IERC20(USDC).balanceOf(address(tim));
_preStable_occ = IERC20(USDC).balanceOf(address(OCC_Modular_USDC));
(,, _preInfo) = OCC_Modular_DAI.loanInfo(_loanID_USDC);
hevm.expectEmit(true, true, false, true, address(OCC_Modular_USDC));
emit OfferAccepted(_loanID_USDC, _preInfo[0], address(tim), block.timestamp - block.timestamp % 7 days + 9 days + _preInfo[6]);
assert(tim.try_acceptOffer(address(OCC_Modular_USDC), _loanID_USDC));
// Post-state USDC
(,, _postInfo) = OCC_Modular_USDC.loanInfo(_loanID_USDC);
_postStable_borrower = IERC20(USDC).balanceOf(address(tim));
_postStable_occ = IERC20(USDC).balanceOf(address(OCC_Modular_USDC));
assertEq(_postInfo[3], block.timestamp - block.timestamp % 7 days + 9 days + _postInfo[6]);
assertEq(_postInfo[9], 2);
assertEq(_postStable_borrower - _preStable_borrower, _postInfo[0]);
assertEq(_preStable_occ - _postStable_occ, _postInfo[0]);
// Pre-state USDT.
_preStable_borrower = IERC20(USDT).balanceOf(address(tim));
_preStable_occ = IERC20(USDT).balanceOf(address(OCC_Modular_USDT));
(,, _preInfo) = OCC_Modular_DAI.loanInfo(_loanID_USDT);
hevm.expectEmit(true, true, false, true, address(OCC_Modular_USDT));
emit OfferAccepted(_loanID_USDT, _preInfo[0], address(tim), block.timestamp - block.timestamp % 7 days + 9 days + _preInfo[6]);
assert(tim.try_acceptOffer(address(OCC_Modular_USDT), _loanID_USDT));
// Post-state USDT
(,, _postInfo) = OCC_Modular_USDT.loanInfo(_loanID_USDT);
_postStable_borrower = IERC20(USDT).balanceOf(address(tim));
_postStable_occ = IERC20(USDT).balanceOf(address(OCC_Modular_USDT));
assertEq(_postInfo[3], block.timestamp - block.timestamp % 7 days + 9 days + _postInfo[6]);
assertEq(_postInfo[9], 2);
assertEq(_postStable_borrower - _preStable_borrower, _postInfo[0]);
assertEq(_preStable_occ - _postStable_occ, _postInfo[0]);
}
// Validate callLoan() state changes.
// Validate callLoan() restrictions.
// This includes:
// - _msgSender() must be borrower
// - loans[id].state must equal LoanState.Active
function test_OCC_Modular_callLoan_restrictions_msgSender(uint96 random, bool choice) public {
(
uint256 _loanID_DAI,
uint256 _loanID_FRAX,
uint256 _loanID_USDC,
uint256 _loanID_USDT
) = simulateITO_and_createOffers_and_acceptOffers(random, choice);
mint("DAI", address(bob), uint256(random));
mint("FRAX", address(bob), uint256(random));
mint("USDC", address(bob), uint256(random));
mint("USDT", address(bob), uint256(random));
assert(bob.try_approveToken(DAI, address(OCC_Modular_DAI), uint256(random)));
assert(bob.try_approveToken(FRAX, address(OCC_Modular_FRAX), uint256(random)));
assert(bob.try_approveToken(USDC, address(OCC_Modular_USDC), uint256(random)));
assert(bob.try_approveToken(USDT, address(OCC_Modular_USDT), uint256(random)));
// Can't callLoan() unless _msgSender() == borrower.
hevm.startPrank(address(bob));
hevm.expectRevert("OCC_Modular::callLoan() _msgSender() != loans[id].borrower && !isLocker(_msgSender())");
OCC_Modular_DAI.callLoan(_loanID_DAI);
hevm.stopPrank();
assert(!bob.try_callLoan(address(OCC_Modular_FRAX), _loanID_FRAX));
assert(!bob.try_callLoan(address(OCC_Modular_USDC), _loanID_USDC));
assert(!bob.try_callLoan(address(OCC_Modular_USDT), _loanID_USDT));
}
function test_OCC_Modular_callLoan_restrictions_loanState(uint96 random, bool choice) public {
(
uint256 _loanID_DAI,
uint256 _loanID_FRAX,
uint256 _loanID_USDC,
uint256 _loanID_USDT
) = simulateITO_and_createOffers_and_acceptOffers(random, choice);
mint("DAI", address(bob), uint256(random));
mint("FRAX", address(bob), uint256(random));
mint("USDC", address(bob), uint256(random));
mint("USDT", address(bob), uint256(random));
assert(bob.try_approveToken(DAI, address(OCC_Modular_DAI), uint256(random)));
assert(bob.try_approveToken(FRAX, address(OCC_Modular_FRAX), uint256(random)));
assert(bob.try_approveToken(USDC, address(OCC_Modular_USDC), uint256(random)));
assert(bob.try_approveToken(USDT, address(OCC_Modular_USDT), uint256(random)));
_loanID_DAI = createRandomOffer(random, choice, DAI);
_loanID_FRAX = createRandomOffer(random, choice, FRAX);
_loanID_USDC = createRandomOffer(random, choice, USDC);
_loanID_USDT = createRandomOffer(random, choice, USDT);
// Can't callLoan() unless state = LoanState.active.
hevm.startPrank(address(tim));
hevm.expectRevert("OCC_Modular::callLoan() loans[id].state != LoanState.Active");
OCC_Modular_DAI.callLoan(_loanID_DAI);
hevm.stopPrank();
assert(!tim.try_callLoan(address(OCC_Modular_FRAX), _loanID_FRAX));
assert(!tim.try_callLoan(address(OCC_Modular_USDC), _loanID_USDC));
assert(!tim.try_callLoan(address(OCC_Modular_USDT), _loanID_USDT));
}
function test_OCC_Modular_callLoan_state_DAI(uint96 random, bool choice) public {
(uint256 _loanID_DAI,,,) = simulateITO_and_createOffers_and_acceptOffers(random, choice);
// Pre-state DAI.
(,, uint256[10] memory _preInfo) = OCC_Modular_DAI.loanInfo(_loanID_DAI);
uint256 principalOwed = _preInfo[0];
// 20% chance to make late callLoan() (warp ahead of time).
if (principalOwed % 5 == 0) {
hevm.warp(_preInfo[3] + random % 7776000); // Potentially up to 90 days late callLoan().
}
(, uint256 interestOwed, uint256 lateFee,) = OCC_Modular_DAI.amountOwed(_loanID_DAI);
uint256[6] memory balanceData = [
IERC20(DAI).balanceOf(address(DAO)), // _preDAO_stable
IERC20(DAI).balanceOf(address(DAO)), // _postDAO_stable
IERC20(DAI).balanceOf(address(YDL)), // _preYDL_stable
IERC20(DAI).balanceOf(address(YDL)), // _postYDL_stable
IERC20(DAI).balanceOf(address(tim)), // _preTim_stable
IERC20(DAI).balanceOf(address(tim)) // _postTim_stable
];
assertEq(_preInfo[9], 2);
// Check amountOwed() interest ...
if (block.timestamp > _preInfo[3]) {
// loans[id].principalOwed * loans[id].paymentInterval * loans[id].APR / (86400 * 365 * BIPS) +
// loans[id].principalOwed * (block.timestamp - loans[id].paymentDueBy) * (loans[id].APR + loans[id].APRLateFee) / (86400 * 365 * BIPS);
assertEq(
interestOwed + lateFee,
_preInfo[0] * _preInfo[6] * _preInfo[1] / (86400 * 365 * BIPS) +
_preInfo[0] * (block.timestamp - _preInfo[3]) * (_preInfo[2]) / (86400 * 365 * BIPS)
);
}
else {
// loans[id].principalOwed * loans[id].paymentInterval * loans[id].APR / (86400 * 365 * BIPS)
assertEq(
interestOwed + lateFee,
_preInfo[0] * _preInfo[6] * _preInfo[1] / (86400 * 365 * BIPS)
);
}
hevm.expectEmit(true, false, false, true, address(OCC_Modular_DAI));
emit LoanCalled(_loanID_DAI, principalOwed + interestOwed + lateFee, principalOwed, interestOwed, lateFee);
assert(tim.try_callLoan(address(OCC_Modular_DAI), _loanID_DAI));
// Post-state.
(,, uint256[10] memory _postInfo) = OCC_Modular_DAI.loanInfo(_loanID_DAI);
balanceData[1] = IERC20(DAI).balanceOf(address(DAO));
balanceData[3] = IERC20(DAI).balanceOf(address(YDL));
balanceData[5] = IERC20(DAI).balanceOf(address(tim));
assertEq(balanceData[1] - balanceData[0], principalOwed);
assertEq(balanceData[3] - balanceData[2], interestOwed + lateFee);
assertEq(balanceData[4] - balanceData[5], principalOwed + interestOwed + lateFee);
// info[0] = principalOwed
// info[3] = paymentDueBy
// info[4] = paymentsRemaining
// info[6] = paymentInterval
// info[9] = loanState
assertEq(_postInfo[0], 0);
assertEq(_postInfo[3], 0);
assertEq(_postInfo[4], 0);
assertEq(_postInfo[9], 3);
}
function test_OCC_Modular_callLoan_state_FRAX(uint96 random, bool choice) public {
(, uint256 _loanID_FRAX,,) = simulateITO_and_createOffers_and_acceptOffers(random, choice);
// Pre-state FRAX.
(,, uint256[10] memory _preInfo) = OCC_Modular_FRAX.loanInfo(_loanID_FRAX);
uint256 principalOwed = _preInfo[0];
// 20% chance to make late callLoan() (warp ahead of time).
if (principalOwed % 5 == 0) {
hevm.warp(_preInfo[3] + random % 7776000); // Potentially up to 90 days late callLoan().
}
(, uint256 interestOwed, uint256 lateFee,) = OCC_Modular_FRAX.amountOwed(_loanID_FRAX);
uint256[6] memory balanceData = [
IERC20(FRAX).balanceOf(address(DAO)), // _preDAO_stable
IERC20(FRAX).balanceOf(address(DAO)), // _postDAO_stable
IERC20(FRAX).balanceOf(address(Treasury)), // _prcOCT_stable
IERC20(FRAX).balanceOf(address(Treasury)), // _postOCT_stable
IERC20(FRAX).balanceOf(address(tim)), // _preTim_stable
IERC20(FRAX).balanceOf(address(tim)) // _postTim_stable
];
assertEq(_preInfo[9], 2);
// Check amountOwed() interest ...
if (block.timestamp > _preInfo[3]) {
// loans[id].principalOwed * loans[id].paymentInterval * loans[id].APR / (86400 * 365 * BIPS) +
// loans[id].principalOwed * (block.timestamp - loans[id].paymentDueBy) * (loans[id].APR + loans[id].APRLateFee) / (86400 * 365 * BIPS);
assertEq(
interestOwed + lateFee,
_preInfo[0] * _preInfo[6] * _preInfo[1] / (86400 * 365 * BIPS) +
_preInfo[0] * (block.timestamp - _preInfo[3]) * (_preInfo[2]) / (86400 * 365 * BIPS)
);
}
else {
// loans[id].principalOwed * loans[id].paymentInterval * loans[id].APR / (86400 * 365 * BIPS)
assertEq(
interestOwed + lateFee,
_preInfo[0] * _preInfo[6] * _preInfo[1] / (86400 * 365 * BIPS)
);
}
hevm.expectEmit(true, false, false, true, address(OCC_Modular_FRAX));
emit LoanCalled(_loanID_FRAX, principalOwed + interestOwed + lateFee, principalOwed, interestOwed, lateFee);
assert(tim.try_callLoan(address(OCC_Modular_FRAX), _loanID_FRAX));
// Post-state.
(,, uint256[10] memory _postInfo) = OCC_Modular_FRAX.loanInfo(_loanID_FRAX);
balanceData[1] = IERC20(FRAX).balanceOf(address(DAO));
balanceData[3] = IERC20(FRAX).balanceOf(address(Treasury));
balanceData[5] = IERC20(FRAX).balanceOf(address(tim));
assertEq(balanceData[1] - balanceData[0], principalOwed);
assertEq(balanceData[3] - balanceData[2], interestOwed + lateFee);
assertEq(balanceData[4] - balanceData[5], principalOwed + interestOwed + lateFee);
// info[0] = principalOwed
// info[3] = paymentDueBy
// info[4] = paymentsRemaining
// info[6] = paymentInterval
// info[9] = loanState
assertEq(_postInfo[0], 0);
assertEq(_postInfo[3], 0);
assertEq(_postInfo[4], 0);
assertEq(_postInfo[9], 3);
}
function test_OCC_Modular_callLoan_state_USDC(uint96 random, bool choice) public {
(,, uint256 _loanID_USDC,) = simulateITO_and_createOffers_and_acceptOffers(random, choice);
// Pre-state USDC.
(,, uint256[10] memory _preInfo) = OCC_Modular_USDC.loanInfo(_loanID_USDC);
uint256 principalOwed = _preInfo[0];
// 20% chance to make late callLoan() (warp ahead of time).
if (principalOwed % 5 == 0) {
hevm.warp(_preInfo[3] + random % 7776000); // Potentially up to 90 days late callLoan().
}
(, uint256 interestOwed, uint256 lateFee,) = OCC_Modular_USDC.amountOwed(_loanID_USDC);
uint256[6] memory balanceData = [
IERC20(USDC).balanceOf(address(DAO)), // _preDAO_stable
IERC20(USDC).balanceOf(address(DAO)), // _postDAO_stable
IERC20(USDC).balanceOf(address(Treasury)), // _prcOCT_stable
IERC20(USDC).balanceOf(address(Treasury)), // _postOCT_stable
IERC20(USDC).balanceOf(address(tim)), // _preTim_stable
IERC20(USDC).balanceOf(address(tim)) // _postTim_stable
];
assertEq(_preInfo[9], 2);
// Check amountOwed() interest ...
if (block.timestamp > _preInfo[3]) {
// loans[id].principalOwed * loans[id].paymentInterval * loans[id].APR / (86400 * 365 * BIPS) +
// loans[id].principalOwed * (block.timestamp - loans[id].paymentDueBy) * (loans[id].APR + loans[id].APRLateFee) / (86400 * 365 * BIPS);
assertEq(
interestOwed + lateFee,
_preInfo[0] * _preInfo[6] * _preInfo[1] / (86400 * 365 * BIPS) +
_preInfo[0] * (block.timestamp - _preInfo[3]) * (_preInfo[2]) / (86400 * 365 * BIPS)
);
}
else {
// loans[id].principalOwed * loans[id].paymentInterval * loans[id].APR / (86400 * 365 * BIPS)
assertEq(
interestOwed + lateFee,
_preInfo[0] * _preInfo[6] * _preInfo[1] / (86400 * 365 * BIPS)
);
}
hevm.expectEmit(true, false, false, true, address(OCC_Modular_USDC));
emit LoanCalled(_loanID_USDC, principalOwed + interestOwed + lateFee, principalOwed, interestOwed, lateFee);
assert(tim.try_callLoan(address(OCC_Modular_USDC), _loanID_USDC));
// Post-state.
(,, uint256[10] memory _postInfo) = OCC_Modular_USDC.loanInfo(_loanID_USDC);
balanceData[1] = IERC20(USDC).balanceOf(address(DAO));
balanceData[3] = IERC20(USDC).balanceOf(address(Treasury));
balanceData[5] = IERC20(USDC).balanceOf(address(tim));
assertEq(balanceData[1] - balanceData[0], principalOwed);
assertEq(balanceData[3] - balanceData[2], interestOwed + lateFee);
assertEq(balanceData[4] - balanceData[5], principalOwed + interestOwed + lateFee);
// info[0] = principalOwed
// info[3] = paymentDueBy
// info[4] = paymentsRemaining
// info[6] = paymentInterval
// info[9] = loanState
assertEq(_postInfo[0], 0);
assertEq(_postInfo[3], 0);
assertEq(_postInfo[4], 0);
assertEq(_postInfo[9], 3);
}
function test_OCC_Modular_callLoan_state_USDT(uint96 random, bool choice) public {
(,,, uint256 _loanID_USDT) = simulateITO_and_createOffers_and_acceptOffers(random, choice);
// Pre-state USDT.
(,, uint256[10] memory _preInfo) = OCC_Modular_USDT.loanInfo(_loanID_USDT);
uint256 principalOwed = _preInfo[0];
// 20% chance to make late callLoan() (warp ahead of time).
if (principalOwed % 5 == 0) {
hevm.warp(_preInfo[3] + random % 7776000); // Potentially up to 90 days late callLoan().
}
(, uint256 interestOwed, uint256 lateFee,) = OCC_Modular_USDT.amountOwed(_loanID_USDT);
uint256[6] memory balanceData = [
IERC20(USDT).balanceOf(address(DAO)), // _preDAO_stable
IERC20(USDT).balanceOf(address(DAO)), // _postDAO_stable
IERC20(USDT).balanceOf(address(Treasury)), // _prcOCT_stable
IERC20(USDT).balanceOf(address(Treasury)), // _postOCT_stable
IERC20(USDT).balanceOf(address(tim)), // _preTim_stable
IERC20(USDT).balanceOf(address(tim)) // _postTim_stable
];
assertEq(_preInfo[9], 2);
// Check amountOwed() interest ...
if (block.timestamp > _preInfo[3]) {
// loans[id].principalOwed * loans[id].paymentInterval * loans[id].APR / (86400 * 365 * BIPS) +
// loans[id].principalOwed * (block.timestamp - loans[id].paymentDueBy) * (loans[id].APR + loans[id].APRLateFee) / (86400 * 365 * BIPS);
assertEq(
interestOwed + lateFee,