From b5264a7c66758341c42d32e91a747d34f0c18f31 Mon Sep 17 00:00:00 2001
From: emilio <emilio@ethlend.io>
Date: Tue, 11 Aug 2020 12:32:34 +0200
Subject: [PATCH] Removed rayPow

---
 contracts/libraries/WadRayMath.sol | 16 ----------------
 test/helpers/utils/math.ts         | 15 ---------------
 2 files changed, 31 deletions(-)

diff --git a/contracts/libraries/WadRayMath.sol b/contracts/libraries/WadRayMath.sol
index bf3495b3..0dc29657 100644
--- a/contracts/libraries/WadRayMath.sol
+++ b/contracts/libraries/WadRayMath.sol
@@ -113,20 +113,4 @@ library WadRayMath {
     return a.mul(WAD_RAY_RATIO);
   }
 
-  /**
-   * @dev calculates base^exp. The code uses the ModExp precompile
-   * @return z base^exp, in ray
-   */
-  //solium-disable-next-line
-  function rayPow(uint256 x, uint256 n) internal pure returns (uint256 z) {
-    z = n % 2 != 0 ? x : RAY;
-
-    for (n /= 2; n != 0; n /= 2) {
-      x = rayMul(x, x);
-
-      if (n % 2 != 0) {
-        z = rayMul(z, x);
-      }
-    }
-  }
 }
diff --git a/test/helpers/utils/math.ts b/test/helpers/utils/math.ts
index a56de5e0..df6165d2 100644
--- a/test/helpers/utils/math.ts
+++ b/test/helpers/utils/math.ts
@@ -13,7 +13,6 @@ declare module 'bignumber.js' {
     rayDiv: (a: BigNumber) => BigNumber;
     rayToWad: () => BigNumber;
     wadToRay: () => BigNumber;
-    rayPow: (n: BigNumber) => BigNumber;
   }
 }
 
@@ -65,17 +64,3 @@ BigNumber.prototype.rayToWad = function (): BigNumber {
 BigNumber.prototype.wadToRay = function (): BigNumber {
   return this.multipliedBy(WAD_RAY_RATIO).decimalPlaces(0, BigNumber.ROUND_DOWN);
 };
-
-BigNumber.prototype.rayPow = function (n: BigNumber): BigNumber {
-  let z = !n.modulo(2).eq(0) ? this : new BigNumber(RAY);
-  let x = new BigNumber(this);
-
-  for (n = n.div(2); !n.eq(0); n = n.div(2)) {
-    x = x.rayMul(x);
-
-    if (!n.modulo(2).eq(0)) {
-      z = z.rayMul(x);
-    }
-  }
-  return z;
-};