Warungs pool orders. Grosirs bid for them.
Small neighbourhood shops pool their orders, wholesalers bid in a sealed auction, and a NEAR contract holds the money. Reference prices: PIHPS Nasional, 2026-11-11.
The four staples
Medium rice (type II)
per kg
- PIHPS
- Rp16,650
- Last price
- Rp11,924
- Below PIHPS
- 28.4%
PIHPS is 23.3% above the HET ceiling
Local granulated sugar
per kg
- PIHPS
- Rp19,950
- Last price
- Rp15,683
- Below PIHPS
- 21.4%
PIHPS is 14.0% above the HET ceiling
Chicken eggs
per kg
- PIHPS
- Rp28,350
- Last price
- Rp26,898
- Below PIHPS
- 5.1%
Bulk cooking oil
per kg
- PIHPS
- Rp20,800
- Last price
- Rp14,801
- Below PIHPS
- 28.8%
Savings per round
20.3% below PIHPS on average across 41 settled rounds
Last 12 settled
| Round | Item | Below PIHPS | Saved |
|---|---|---|---|
| #33 | Oil | 28.8% | Rp569,905 |
| #34 | Eggs | 5.1% | Rp188,760 |
| #35 | Rice | 28.4% | Rp392,258 |
| #36 | Sugar | 21.4% | Rp657,118 |
| #37 | Oil | 28.4% | Rp975,150 |
| #38 | Eggs | 1.3% | Rp47,614 |
| #39 | Rice | 28.4% | Rp576,572 |
| #40 | Sugar | 21.4% | Rp593,113 |
| #41 | Oil | 28.8% | Rp641,893 |
| #42 | Eggs | 5.1% | Rp201,828 |
| #43 | Rice | 28.4% | Rp680,544 |
| #44 | Sugar | 21.4% | Rp614,448 |
Latest rounds
Recent rounds
All rounds- Local granulated sugar #449 warungs · 144 kg · Rp15,683/kgSaved Rp614,448, 21.4% below PIHPS
- Medium rice (type II) #4310 warungs · 144 kg · Rp11,924/kgSaved Rp680,544, 28.4% below PIHPS
- Chicken eggs #4211 warungs · 139 kg · Rp26,898/kgSaved Rp201,828, 5.1% below PIHPS
- Bulk cooking oil #419 warungs · 107 kg · Rp14,801/kgSaved Rp641,893, 28.8% below PIHPS
- Local granulated sugar #409 warungs · 139 kg · Rp15,683/kgSaved Rp593,113, 21.4% below PIHPS
How it works
1Pool orders
Every warung has an agent. The agent locks balance for the quantity needed and never goes past the owner's price limit or budget.
2Sealed-bid auction
Each grosir (wholesaler) submits a price hash plus a 5% bond, then reveals the price in the next phase. The lowest valid price wins.
3Difference refunded
Warungs get back the gap between the max price and the winning price. The bond of a grosir that never reveals is split among buyers.
4Deliver and pay
Payment stays in the contract until the owner confirms receipt, or counts as received automatically if the owner stays silent until the deadline.
What is real and what is assumed. The PIHPS reference prices (11 Nov 2026) and HET (government ceiling price) are official data, stored on-chain; no round's max price can exceed the PIHPS price. The costs of the grosirs we run ourselves are assumptions (0.85 to 0.97 times HET), not real wholesale prices. tIDR is testnet test rupiah. Warungs named warung-NN are seeded test accounts with fictional owner names; any other account was created outside our seeded set.