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Do not allow to mint dollar when collateral is equal to zero #892

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merged 3 commits into from
Feb 3, 2024
Merged

Do not allow to mint dollar when collateral is equal to zero #892

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3f3ffea
fix: do not allow to mint dollar with zero collateral
gitcoindev Feb 2, 2024
33d0fa1
test: add testMintDollar_ShouldRevert_IfZeroCollateralAvailable
gitcoindev Feb 2, 2024
8efd07f
test: update comment in zero collateral mint test
gitcoindev Feb 2, 2024
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1 change: 1 addition & 0 deletions packages/contracts/src/dollar/libraries/LibUbiquityPool.sol
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Original file line number Diff line number Diff line change
Expand Up @@ -368,6 +368,7 @@ library LibUbiquityPool {

// get amount of collateral for minting Dollars
collateralNeeded = getDollarInCollateral(collateralIndex, dollarAmount);
require(collateralNeeded > 0, "Cannot mint with zero collateral");
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// subtract the minting fee
totalDollarMint = dollarAmount
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21 changes: 21 additions & 0 deletions packages/contracts/test/diamond/facets/UbiquityPoolFacet.t.sol
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Expand Up @@ -329,6 +329,27 @@ contract UbiquityPoolFacetTest is DiamondTestSetup {
);
}

function testMintDollar_ShouldRevert_IfZeroCollateralAvailable() public {
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vm.prank(admin);
ubiquityPoolFacet.setPriceThresholds(
1000000, // mint threshold
1000000 // redeem threshold
);
// reset collateral fees to 0
vm.prank(admin);
ubiquityPoolFacet.setFees(0, 0, 0);

// user tries to mint with zero collateral
vm.prank(user);
vm.expectRevert("Cannot mint with zero collateral");
ubiquityPoolFacet.mintDollar(
0, // collateral index
0, // Dollar amount
100e18, // min amount of Dollars to mint
0 // max collateral to send
);
}

function testMintDollar_ShouldRevert_OnDollarAmountSlippage() public {
vm.prank(admin);
ubiquityPoolFacet.setPriceThresholds(
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