added exchange rate and cpi getters on policy

Author: aalavandhan

contracts/UFragmentsPolicy.sol

@@ -124,22 +124,17 @@ contract UFragmentsPolicy is Ownable {
 
         epoch = epoch.add(1);
 
-        uint256 targetRate;
-        bool targetRateValid;
-        (targetRate, targetRateValid) = cpiOracle.getData();
+        (uint256 targetRate, bool targetRateValid) = getTargetRate();
         require(targetRateValid);
 
-        uint256 exchangeRate;
-        bool rateValid;
-        (exchangeRate, rateValid) = marketOracle.getData();
+        (uint256 exchangeRate, bool rateValid) = getExchangeRate();
         require(rateValid);
 
         if (exchangeRate > MAX_RATE) {
             exchangeRate = MAX_RATE;
         }
 
         int256 supplyDelta = computeSupplyDelta(exchangeRate, targetRate);
-
         if (supplyDelta > 0 && uFrags.totalSupply().add(uint256(supplyDelta)) > MAX_SUPPLY) {
             supplyDelta = (MAX_SUPPLY.sub(uFrags.totalSupply())).toInt256Safe();
         }
@@ -267,6 +262,20 @@ contract UFragmentsPolicy is Ownable {
         uFrags = uFrags_;
     }
 
+    /**
+     * @return The current price target and validity from the cpi oracle.
+     */
+    function getTargetRate() public returns (uint256, bool) {
+        return cpiOracle.getData();
+    }
+
+    /**
+     * @return The current exchange rate and validity from the market oracle.
+     */
+    function getExchangeRate() public returns (uint256, bool) {
+        return marketOracle.getData();
+    }
+
     /**
      * @return If the latest block timestamp is within the rebase time window it, returns true.
      *         Otherwise, returns false.
@@ -333,7 +342,6 @@ contract UFragmentsPolicy is Ownable {
             rebaseFunctionUpperPercentage,
             rebaseFunctionGrowth
         );
-
         return uFrags.totalSupply().toInt256Safe().mul(rebasePercentage).div(ONE);
     }
 

test/unit/UFragmentsPolicy.ts

@@ -20,8 +20,8 @@ const INITIAL_TARGET_RATE_25P_LESS = imul(INITIAL_TARGET_RATE, '0.75', 1)
 const INITIAL_RATE = ethers.utils.parseUnits('1.05', 18)
 const INITIAL_RATE_30P_MORE = imul(INITIAL_RATE, '1.3', 1)
 const INITIAL_RATE_30P_LESS = imul(INITIAL_RATE, '0.7', 1)
-const INITIAL_RATE_5P_MORE = imul(INITIAL_RATE, '1.05', 1)
-const INITIAL_RATE_5P_LESS = imul(INITIAL_RATE, '0.95', 1)
+const INITIAL_RATE_2P_MORE = imul(INITIAL_RATE, '1.02', 1)
+const INITIAL_RATE_2P_LESS = imul(INITIAL_RATE, '0.98', 1)
 const INITIAL_RATE_60P_MORE = imul(INITIAL_RATE, '1.6', 1)
 const INITIAL_RATE_50P_LESS = imul(INITIAL_RATE, '0.5', 1)
 const INITIAL_RATE_2X = INITIAL_RATE.mul(2)
@@ -702,7 +702,7 @@ describe('UFragmentsPolicy:Rebase', async function () {
       await increaseTime(60)
 
       await mockExternalData(
-        INITIAL_RATE_5P_MORE.sub(2),
+        INITIAL_RATE_2P_MORE.sub(2),
         INITIAL_TARGET_RATE,
         1000,
       )
@@ -716,7 +716,7 @@ describe('UFragmentsPolicy:Rebase', async function () {
       await increaseTime(60)
 
       await mockExternalData(
-        INITIAL_RATE_5P_LESS.add(2),
+        INITIAL_RATE_2P_LESS.add(2),
         INITIAL_TARGET_RATE,
         1000,
       )