Four-Cell Clocked Piglin Bartering Bank in Minecraft

Use zero-based coordinates. Build the 27x14 stone-brick base at y=0 in a safe, cleared Nether area. Cover every otherwise empty y=1 cell with black carpet.

💡 Leave modeled circuit and support positions clear of carpet. The carpet prevents wild mobs from spawning on the base. Build in the Nether below the bedrock ceiling so both editions can use the footprint. Bring four adult piglins from Nether wastes or a crimson forest; never transport them to the Overworld. Leave access around all four outputs. Normal farm operation also requires the entire clock and every cage to remain simulated.

For x=3, 9, 15 and 21, place a solid block at (x, 1, 5), south-facing hoppers at (x, 2, 5..6), and a chest at (x, 2, 7).

💡 The first hopper is the cell floor; its block immediately below is a redstone lock input. Its outlet feeds the second hopper and chest. Leave every chest lid unobstructed. Keep the front faces accessible from the base.

At each x, surround (x, 2..4, 5) with glass walls and place the bottom-slab ceiling at (x, 5, 5).

💡 Each cage has a one-block-square interior, a hopper floor and about 2.375 blocks of vertical space above the hopper bowl. Glass goes at x-1 and x+1, z=5 and at z=4 and z=6. The y=2 south hopper replaces the lower wall there. The later dropper replaces the north glass at y=4; close every other opening.

Replace the north wall at (x, 4, 4) with a south-facing dropper. Put a downward hopper at (x, 5, 4) and an input chest at (x, 6, 4).

💡 There are four separate input chests: split the starting 256 ingots evenly, 64 per chest. The downward hopper fills its dropper. Do not load nuggets, blocks of gold or other items. The dropper ejects at adult head height into the enclosed cell, and the locked floor gives the adult time to pick the gold up.

At y=1, build a clockwise loop around x=0..24, z=8..12. Use dust at its four corners and at x=3, 9, 15, 21 on z=8; set all 48 repeaters to delay 4.

💡 North edge z=8 points east, east edge x=24 south, south edge z=12 west, and west edge x=0 north. The four north dust taps are essential: repeaters do not output sideways. Corner dust connects each incoming repeater to the outgoing one. This is 19.2 seconds of repeater delay per circulation; do not shorten it to a fast comparator clock.

Run each tap north to dust at (x, 1, 7), then a north-facing one-tick repeater at (x, 1, 6). Build its west stair branch to a south-facing four-tick repeater at (x, 4, 3).

💡 The lower repeater strongly powers the block below the floor hopper, locking pickup. From (x, 1, 7), the separate offer wire goes west through x-1 and x-2, then north via (x-2, 1, 6), (x-2, 2, 5), (x-2, 3, 4), (x-2, 4, 3), (x-2, 4, 2), (x-1, 4, 2), and (x, 4, 2). Put solid supports under the raised dust and repeater. The upper repeater faces south into the dropper; its delay makes the offer start 0.3 seconds after the lock. Keep the spaces above each lower stair wire clear so it can climb.

Build the bottom-slab catwalk at x=0..24, y=5, z=2..3. Build the support column at (26, 1..6, 3), with west-facing ladder segments at (25, 1..5, 3).

💡 The ladder reaches the slab deck beside the upper gold chests. The ceiling slab at (26, 7, 3) caps the column. Do not replace the catwalk with full blocks at y=4: those coordinates contain the delayed offer wiring.

Capture one adult in each cage, name every piglin and reseal the cells. Add the floor-mounted oak button at (0, 1, 13), then press it once.

💡 Wear the gold helmet while moving and naming piglins, and use temporary openings only while the timer is stopped. Baby piglins consume gold without bartering; brutes never barter. Use an anvil to rename all four tags first. An oak button supplies a nominal 1.5-second pulse; do not use a stone button or hold a lever on the ring. mobGriefing must permit item pickup. Watch one complete offer cycle in every cell: the floor hopper must lock first, the ingot must enter the adult's hand, and later barter loot must drain into that cell's chest.