Setup the dynamic "current epoch" calculation in action

.github/workflows/calculate-epoch.js

@@ -0,0 +1,7 @@
+const startDate = new Date(1658430005000)
+
+const diffInMs = new Date() - startDate
+const diff = (diffInMs / 1000 / 60 / 60) / 84
+//           (      diff in hours      )    `- epoch increases every 84 hours
+const currentEpoch = Math.floor(diff)
+console.log(currentEpoch)

.github/workflows/scheduled.yaml

@@ -7,7 +7,7 @@ on:
   - cron:  '0 6 * * 5' # Every Friday at 08:00 +2
   workflow_dispatch:
     inputs:
-      name:
+      first_reward_epoch:
         description: "First reward epoch"
         type: number
 
@@ -23,6 +23,17 @@ jobs:
       run: yarn install --frozen-lockfile
     - name: Run process-staking-rewards
       run: yarn run process-staking-rewards
+    - name: Calculate current epoch
+      if: "${{ github.event.inputs.first_reward_epoch == '' }}"
+      run: |
+        export FIRST_REWARD_EPOCH="$(node .github/workflows/calculate-epoch.js)"
+        jq --arg epoch "$FIRST_REWARD_EPOCH" '.FIRST_REWARD_EPOCH = $epoch' configs/networks/flare.json > configs/networks/flare.json
+    - name: Replace FIRST_REWARD_EPOCH
+      if: "${{ github.event.inputs.first_reward_epoch != '' }}"
+      run: |
+        jq --arg epoch "${{ github.event.inputs.first_reward_epoch }}" '.FIRST_REWARD_EPOCH = $epoch' configs/networks/flare.json > configs/networks/flare.json
+    - name: Print out flare.json
+      run: cat configs/networks/flare.json
     - name: Archive code coverage results
       uses: actions/upload-artifact@v3
       with: