[PROTOCOL-622] Manager Profit Fee

config/platform-settings.ts

@@ -37,6 +37,12 @@ const mainnetPlatformSettings: PlatformSettings = {
     min: 0,
     max: 10000,
   },
+  ProfitFeePercent: {
+    processOnDeployment: true,
+    value: 500,
+    min: 0,
+    max: 10000,
+  },
   MaximumLoanDuration: {
     processOnDeployment: true,
     value: 5184000,
@@ -101,6 +107,12 @@ export const platformSettings: Record<string, PlatformSettings> = {
       min: 0,
       max: 10000,
     },
+    ProfitFeePercent: {
+      processOnDeployment: true,
+      value: 500,
+      min: 0,
+      max: 10000,
+    },
     MaximumLoanDuration: {
       processOnDeployment: true,
       value: 5184000,
@@ -163,6 +175,12 @@ export const platformSettings: Record<string, PlatformSettings> = {
       min: 500,
       max: 10000,
     },
+    ProfitFeePercent: {
+      processOnDeployment: true,
+      value: 500,
+      min: 0,
+      max: 10000,
+    },
     MaximumLoanDuration: {
       processOnDeployment: true,
       value: 5184000,
@@ -225,6 +243,12 @@ export const platformSettings: Record<string, PlatformSettings> = {
       min: 0,
       max: 10000,
     },
+    ProfitFeePercent: {
+      processOnDeployment: true,
+      value: 500,
+      min: 0,
+      max: 10000,
+    },
     MaximumLoanDuration: {
       processOnDeployment: true,
       value: 5184000,

contracts/market/RepayFacet.sol

@@ -59,6 +59,12 @@ contract RepayFacet is RolesMods, ReentryMods, PausableMods, EscrowClaimTokens {
         uint256 totalOwed
     );
 
+    event ProfitFeeClaimed(
+        uint256 indexed loanID,
+        uint256 amount,
+        address sender
+    );
+
     /**
      * @notice This event is emitted when a loan has been successfully liquidated
      * @param loanID ID of loan from which collateral was withdrawn
@@ -216,6 +222,47 @@ contract RepayFacet is RolesMods, ReentryMods, PausableMods, EscrowClaimTokens {
                     );
                 }
 
+                //MGMT Profit Fee
+                address lendingToken = LibLoans.loan(loanID).lendingToken;
+
+                uint256 lendingTokenBalance = LibEscrow.balanceOf(
+                    loanID,
+                    lendingToken
+                );
+
+                uint256 excessProfits;
+
+                if (
+                    lendingTokenBalance > LibLoans.loan(loanID).borrowedAmount
+                ) {
+                    //Determine how much excess profit the borrower has earned (look at amt of borrowed $$)
+                    excessProfits =
+                        lendingTokenBalance -
+                        LibLoans.loan(loanID).borrowedAmount;
+                }
+
+                // Multiply excess profits by the profit fee (5%)
+                uint256 amountForProfitFee = NumbersLib.percent(
+                    excessProfits,
+                    uint16(PlatformSettingsLib.getProfitFeePercent())
+                );
+
+                //If excess profit should be claimed for profit fee, send that amount to the tToken liq pool
+                if (amountForProfitFee > 0) {
+                    LibEscrow.e(loanID).claimToken(
+                        lendingToken,
+                        address(tToken),
+                        amountForProfitFee
+                    );
+
+                    emit ProfitFeeClaimed(
+                        loanID,
+                        amountForProfitFee,
+                        msg.sender
+                    );
+                }
+                //End MGMT profit fee
+
                 // Claim tokens in the escrow for the loan if any
                 __claimEscrowTokens(loanID);
 
@@ -353,7 +400,8 @@ library RepayLib {
 
         // Calculate available collateral for reward
         if (collateralAmount > 0) {
-            collateralValue_ = AppStorageLib.store()
+            collateralValue_ = AppStorageLib
+                .store()
                 .priceAggregator
                 .getValueFor(
                     LibLoans.loan(loanID).collateralToken,
@@ -399,7 +447,8 @@ library RepayLib {
         // if the lending reward is less than the collateral lending tokens, then aggregate
         // the value for the lending token with the collateral token and send it to the liquidator
         if (rewardInLending <= collateralInLending) {
-            uint256 rewardInCollateral = AppStorageLib.store()
+            uint256 rewardInCollateral = AppStorageLib
+                .store()
                 .priceAggregator
                 .getValueFor(
                     LibLoans.loan(loanID).lendingToken,
@@ -432,7 +481,8 @@ library RepayLib {
         address recipient,
         uint256 value
     ) private {
-        EnumerableSet.AddressSet storage tokens = MarketStorageLib.store()
+        EnumerableSet.AddressSet storage tokens = MarketStorageLib
+            .store()
             .escrowTokens[loanID];
         uint256 valueLeftToTransfer = value;
 
@@ -482,7 +532,8 @@ library RepayLib {
             if (token == LibLoans.loan(loanID).lendingToken) {
                 balanceInLending = balance;
             } else {
-                balanceInLending = AppStorageLib.store()
+                balanceInLending = AppStorageLib
+                    .store()
                     .priceAggregator
                     .getValueFor(
                         token,

contracts/settings/platform/libraries/PlatformSettingsLib.sol

@@ -95,6 +95,14 @@ library PlatformSettingsLib {
         value_ = s(NAMES.LIQUIDATE_REWARD_PERCENT).value;
     }
 
+    /**
+     * @notice It gets the current "ProfitFeePercent" setting's value
+     * @return value_ the current value.
+     */
+    function getProfitFeePercent() internal view returns (uint16 value_) {
+        value_ = uint16(s(NAMES.PROFIT_FEE_PERCENT).value);
+    }
+
     /**
      * @notice It gets the current "MaximumLoanDuration" setting's value
      * @return value_ the current value.

contracts/settings/platform/names.sol

@@ -52,6 +52,13 @@ bytes32 constant TERMS_EXPIRY_TIME = keccak256("TermsExpiryTime");
      */
 bytes32 constant LIQUIDATE_REWARD_PERCENT = keccak256("LiquidateRewardPercent");
 
+/**
+        @dev The setting name for the profit fee percent setting.
+        @dev It represents the percentage value (with 2 decimal places) for the percent of excess profit on borrowed money that will be collected by the protocol.
+            i.e. A fee of 5% is stored as 500
+     */
+bytes32 constant PROFIT_FEE_PERCENT = keccak256("ProfitFeePercent");
+
 /**
         @dev The setting name for the maximum loan duration settings.
         @dev The maximum loan duration setting is defined in seconds. Loans will not be given for timespans larger than the one specified here.

tasks/test.ts

@@ -22,7 +22,7 @@ task('test').setAction(async (args, hre, runSuper) => {
   })
 
   // Disable logging
-  process.env.DISABLE_LOGS = 'true'
+  process.env.DISABLE_LOGS = 'false'
 
   // Run the actual test task
   await runSuper({

test/fixtures/markets.ts

@@ -38,6 +38,7 @@ export const fundedMarket = async (
   })
 
   tags.push('markets')
+  tags.push('platform-settings')
   await deployments.fixture(tags, {
     keepExistingDeployments,
   })