added minLoan to credit

src/services/CreditService.sol

@@ -8,10 +8,14 @@ import { Service } from "./Service.sol";
 abstract contract CreditService is Service {
     using SafeERC20 for IERC20;
 
+    uint256 public minLoan;
+
+    error LoanBelowMinimum();
     error InvalidInput();
 
     function open(Order calldata order) public virtual override unlocked {
         Agreement memory agreement = order.agreement;
+        if (agreement.loans[0].amount < minLoan) revert LoanBelowMinimum();
         // Transfers deposit the loan to the relevant vault
         // every token corresponds to a collateral token (the vault's address)
         // therefore, the length of the collateral array must be at least the length of the loan array

src/services/credit/CallOption.sol

@@ -43,7 +43,6 @@ contract CallOption is CreditService {
     event IthilTokenAllocated(uint256 amount);
     event IthilTokenSwept(uint256 amount);
 
-    error ZeroAmount();
     error LockPeriodStillActive();
     error MaxLockExceeded();
     error MaxPurchaseExceeded();
@@ -61,6 +60,7 @@ contract CallOption is CreditService {
         address _manager,
         address _ithil,
         uint256 _initialPrice,
+        uint256 _minLoan,
         uint256 _halvingTime,
         uint256 _tenorDuration,
         uint256 _initialVesting,
@@ -83,6 +83,7 @@ contract CallOption is CreditService {
         underlying = IERC20(_underlying);
         ithil = IERC20(_ithil);
         halvingTime = _halvingTime;
+        minLoan = _minLoan;
         tenorDuration = _tenorDuration;
         vestingTime = _initialVesting + block.timestamp;
 
@@ -114,7 +115,6 @@ contract CallOption is CreditService {
 
         if (agreement.loans[0].token != address(underlying)) revert InvalidUnderlyingToken();
         if (agreement.collaterals[1].token != address(ithil)) revert InvalidIthilToken();
-        if (agreement.loans[0].amount == 0) revert ZeroAmount();
 
         uint256 price = _currentPrice();
         // Apply reward based on lock

src/services/credit/FixedYieldService.sol

@@ -22,10 +22,12 @@ contract FixedYieldService is CreditService {
 
     constructor(
         address _manager,
+        uint256 _minLoan,
         uint256 _yield,
         uint256 _deadline
     ) Service("Fixed Yield Service", "FIXED-YIELD-SERVICE", _manager, _deadline) {
         if (_manager == address(0)) revert InvalidParams();
+        minLoan = _minLoan;
         yield = _yield;
     }
 

test/services/DebitCredit.test.sol

@@ -113,7 +113,7 @@ contract DebitCreditTest is Test, IERC721Receiver {
 
         // first price is 0.2 USDC: we need to double it in the constructor
         // because the smallest price can only be achieved by maximum lock time
-        callOptionService = new CallOption(address(manager), address(ithil), 4e5, 86400 * 30, 86400 * 30, 0, usdc);
+        callOptionService = new CallOption(address(manager), address(ithil), 4e5, 1, 86400 * 30, 86400 * 30, 0, usdc);
         vm.stopPrank();
     }
 

test/services/SeniorCallOption.test.sol

@@ -56,7 +56,7 @@ contract CallOptionTest is BaseIntegrationServiceTest {
         IERC20(loanTokens[0]).approve(address(manager), 1);
         manager.create(loanTokens[0]);
 
-        service = new CallOption(address(manager), address(ithil), 4e17, 86400 * 30, 86400 * 30, 0, loanTokens[0]);
+        service = new CallOption(address(manager), address(ithil), 4e17, 1, 86400 * 30, 86400 * 30, 0, loanTokens[0]);
 
         serviceAddress = address(service);
         ithil.approve(serviceAddress, 1e25);

test/services/SeniorFixedYieldService.test.sol

@@ -25,7 +25,7 @@ contract FixedYieldServiceTest is BaseIntegrationServiceTest {
 
     constructor() BaseIntegrationServiceTest(rpcUrl, blockNumber) {
         vm.prank(admin);
-        service = new FixedYieldService(address(manager), 1e16, 86400 * 30);
+        service = new FixedYieldService(address(manager), 1, 1e16, 86400 * 30);
 
         loanLength = 1;
         loanTokens = new address[](loanLength);