From e10aa1b5de2c111291cda9f82268b516dd721da3 Mon Sep 17 00:00:00 2001
From: t11s <greenfeatherhelp@gmail.com>
Date: Thu, 8 Sep 2022 00:33:55 -0700
Subject: [PATCH] =?UTF-8?q?=E2=9C=A8=20toDaysWadUnsafe/fromDaysWadUnsafe?=
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---
 src/utils/SignedWadMath.sol | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/src/utils/SignedWadMath.sol b/src/utils/SignedWadMath.sol
index c743a58f..b77e1db4 100644
--- a/src/utils/SignedWadMath.sol
+++ b/src/utils/SignedWadMath.sol
@@ -12,6 +12,26 @@ function toWadUnsafe(uint256 x) pure returns (int256 r) {
     }
 }
 
+/// @dev Takes an integer amount of seconds and converts it to a wad amount of days.
+/// @dev Will not revert on overflow, only use where overflow is not possible.
+/// @dev Not meant for negative second amounts, it assumes x is positive.
+function toDaysWadUnsafe(uint256 x) pure returns (int256 r) {
+    assembly {
+        // Multiply x by 1e18 and then divide it by 86400.
+        r := div(mul(x, 1000000000000000000), 86400)
+    }
+}
+
+/// @dev Takes a wad amount of days and converts it to an integer amount of seconds.
+/// @dev Will not revert on overflow, only use where overflow is not possible.
+/// @dev Not meant for negative day amounts, it assumes x is positive.
+function fromDaysWadUnsafe(int256 x) pure returns (uint256 r) {
+    assembly {
+        // Multiply x by 86400 and then divide it by 1e18.
+        r := div(mul(x, 86400), 1000000000000000000)
+    }
+}
+
 /// @dev Will not revert on overflow, only use where overflow is not possible.
 function unsafeWadMul(int256 x, int256 y) pure returns (int256 r) {
     assembly {