Initial update conditions checking

package.json

@@ -19,7 +19,7 @@
     "eslint:fix": "pnpm run eslint:check --fix",
     "prettier:check": "prettier --check \"./**/*.{js,ts,md,json}\"",
     "prettier:fix": "prettier --write \"./**/*.{js,ts,md,json}\"",
-    "test": "jest --verbose --runInBand --bail --detectOpenHandles --silent",
+    "test": "jest --verbose --runInBand --bail --detectOpenHandles",
     "test:e2e": "jest --selectProjects e2e --runInBand",
     "tsc": "tsc --project .",
     "docker:build": "docker build -t api3/airseekerv2:latest -f docker/Dockerfile .",

src/condition-check/condition-check.test.ts

@@ -38,10 +38,10 @@ describe('checkUpdateCondition', () => {
   it('checks all update conditions | heartbeat exceeded', () => {
     const result = checkUpdateConditions(
       BigNumber.from(10),
-      Date.now() / 1000,
+      Date.now() / 1000 - 60 * 60 * 24,
       BigNumber.from(10),
-      Date.now() + 60 * 60 * 25,
-      86_400,
+      Date.now() / 1000,
+      60 * 60 * 23,
       2
     );
 

src/condition-check/condition-check.ts

@@ -14,21 +14,29 @@ export const calculateUpdateInPercentage = (initialValue: ethers.BigNumber, upda
 
 export const calculateMedian = (arr: ethers.BigNumber[]) => {
   const mid = Math.floor(arr.length / 2);
+
   const nums = [...arr].sort((a, b) => {
     if (a.lt(b)) return -1;
     else if (a.gt(b)) return 1;
     else return 0;
   });
 
-  if (arr.length % 2 !== 0) {
-    return nums[mid];
-  }
+  const midNumber = nums[mid];
+  if (arr.length % 2 === 0) {
+    const baseNumber = nums[mid - 1];
+
+    if (!baseNumber) {
+      throw new Error('Invalid base number');
+    }
+
+    if (!midNumber) {
+      throw new Error('Invalid mid number');
+    }
 
-  if (mid - 1 > 0) {
-    return nums[mid - 1]!.add(nums[mid]!).div(2);
+    return baseNumber.add(midNumber).div(2);
   }
 
-  throw new Error('Invalid scenario');
+  return midNumber;
 };
 
 export const checkDeviationThresholdExceeded = (