I made two datapacks today from my 1.13 command blocks that I originally had converted from my 1.12.2 command blocks, lot of work the last 2 weeks looking things up and troubleshooting. Just place the *.zip file at \AppData\Roaming\.minecraft\saves\*world*\datapacks\ don't extract them from the zip file (not needed). The datapacks are:
Minecraft v1.13 Portable Ender Chest Data Pack - Summon an ender chest at your feet if standing on redstone while right clicking with a carrot on a stick named "Ender Chest Spawner."
Minecraft v1.13 Grapple Hook Multiplayer Data Pack - While holding one of 4 custom fishing rod grappling hooks. Casting the bobber will teleport you where it lands. Fishing rod grappling hooks are named by colors (Red, Blue, Green, Yellow) for use with multiplayer to prevent cross teleportation if used with in 35 blocks of other players casting the Grappling Hooks with in the same time frame.
Instructions on how to use/get items are in each datapack in a *.txt file within the *.zip