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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,115 @@ | ||
| // SPDX-License-Identifier: GPL-2.0-or-later | ||
| pragma solidity ^0.8.0; | ||
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| import "./helpers/IntegrationTest.sol"; | ||
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| contract ModifiedMorpho { | ||
| address public owner; | ||
| address public feeRecipient; | ||
| mapping(bytes32 => mapping(address => Position)) public position; | ||
| mapping(bytes32 => Market) public market; | ||
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| function writeTotalSupplyAssets(bytes32 id, uint128 newValue) external { | ||
| market[id].totalSupplyAssets = newValue; | ||
| } | ||
| } | ||
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| contract SharePriceTest is IntegrationTest { | ||
| using stdStorage for StdStorage; | ||
| using MorphoBalancesLib for IMorpho; | ||
| using MarketParamsLib for MarketParams; | ||
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| bytes modifiedCode = _makeModifiedCode(); | ||
| bytes normalCode = address(morpho).code; | ||
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| function _makeModifiedCode() internal returns (bytes memory) { | ||
| return address(new ModifiedMorpho()).code; | ||
| } | ||
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| function _writeTotalSupplyAssets(bytes32 id, uint128 newValue) internal { | ||
| vm.etch(address(morpho), modifiedCode); | ||
| ModifiedMorpho(address(morpho)).writeTotalSupplyAssets(id, newValue); | ||
| vm.etch(address(morpho), normalCode); | ||
| } | ||
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| function setUp() public override { | ||
| super.setUp(); | ||
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| _setCap(allMarkets[0], CAP); | ||
| _sortSupplyQueueIdleLast(); | ||
| } | ||
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| function test_totalAssetsCannotDecrease(uint256 assets, uint128 totalSupplyAssets) public { | ||
| assets = bound(assets, MIN_TEST_ASSETS, MAX_TEST_ASSETS); | ||
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| loanToken.setBalance(SUPPLIER, assets); | ||
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| vm.prank(SUPPLIER); | ||
| vault.deposit(assets, ONBEHALF); | ||
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| uint256 totalAssetsBefore = vault.totalAssets(); | ||
| _writeTotalSupplyAssets(Id.unwrap(allMarkets[0].id()), totalSupplyAssets); | ||
| uint256 totalAssetsAfter = vault.totalAssets(); | ||
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| assertGe(totalAssetsAfter, totalAssetsBefore, "totalAssets decreased"); | ||
| } | ||
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| function invariant_totalAssetsCannotDecrease() public { | ||
| uint256 totalAssetsBefore = vault.totalAssets(); | ||
| _writeTotalSupplyAssets(Id.unwrap(allMarkets[0].id()), 0); | ||
| uint256 totalAssetsAfter = vault.totalAssets(); | ||
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| assertGe(totalAssetsAfter, totalAssetsBefore, "totalAssets decreased"); | ||
| } | ||
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| function test_HoleValue() public { | ||
| loanToken.setBalance(SUPPLIER, 1 ether); | ||
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| vm.prank(SUPPLIER); | ||
| vault.deposit(1 ether, ONBEHALF); | ||
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| _writeTotalSupplyAssets(Id.unwrap(allMarkets[0].id()), 0.5 ether); | ||
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| vault.deposit(0, ONBEHALF); // update hole. | ||
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| assertEq(vault.hole(), 0.5 ether, "totalAssets decreased"); | ||
| } | ||
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| function test_HoleValue(uint256 assets, uint128 expectedHole) public { | ||
| assets = bound(assets, MIN_TEST_ASSETS, MAX_TEST_ASSETS); | ||
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| loanToken.setBalance(SUPPLIER, assets); | ||
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| vm.prank(SUPPLIER); | ||
| vault.deposit(assets, ONBEHALF); | ||
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| uint128 totalSupplyAssetsBefore = morpho.market(allMarkets[0].id()).totalSupplyAssets; | ||
| expectedHole = uint128(bound(expectedHole, 0, totalSupplyAssetsBefore)); | ||
|
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| _writeTotalSupplyAssets(Id.unwrap(allMarkets[0].id()), totalSupplyAssetsBefore - expectedHole); | ||
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| vault.deposit(0, ONBEHALF); // update hole. | ||
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| assertEq(vault.hole(), expectedHole, "totalAssets decreased"); | ||
| } | ||
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| function test_HoleEvent(uint256 assets, uint128 expectedHole) public { | ||
| assets = bound(assets, MIN_TEST_ASSETS, MAX_TEST_ASSETS); | ||
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| loanToken.setBalance(SUPPLIER, assets); | ||
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| vm.prank(SUPPLIER); | ||
| vault.deposit(assets, ONBEHALF); | ||
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| uint128 totalSupplyAssetsBefore = morpho.market(allMarkets[0].id()).totalSupplyAssets; | ||
| expectedHole = uint128(bound(expectedHole, 0, totalSupplyAssetsBefore)); | ||
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| _writeTotalSupplyAssets(Id.unwrap(allMarkets[0].id()), totalSupplyAssetsBefore - expectedHole); | ||
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| vm.expectEmit(); | ||
| emit EventsLib.UpdateHole(expectedHole); | ||
| vault.deposit(0, ONBEHALF); // update hole. | ||
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| assertEq(vault.hole(), expectedHole, "totalAssets decreased"); | ||
| } | ||
| } |