=== YUMO YUMO PRICE EPOCH v1 === # # Yumo Yumo — open price ledger # Product prices read from real receipts, published permanently. # # Publisher : Yumo Yumo Inc · https://yumoyumo.com # Sealed by : 32T9x5xGz6uaHtPnRhUhqHgJyWshbDJas7RYahEJjMjE (Solana mainnet) # One memo per epoch, no other authority: # yumoyumo:price-epoch:v1:::: # # Each observation below is identity-free: no buyer, no wallet, no receipt # id, and no time — merchant, city, date and price only. Receipt leaves are # opaque hashes; a receipt sealed with a wallet can be proven its owner's by # signing with that wallet's key, and reveals nothing to anyone else. # # Verify (needs nothing but this file and the memo above): # 1. keccak256(this file) === in the memo # 2. leaf = keccak256(utf8(line)) — the line IS the preimage # node = keccak256(concat(sort([l,r]))) — 32-byte pairs, sorted # leaves sorted ascending; an odd node is carried up unchanged # 3. fold every price-obs:v1| line + every receipt leaf # → must equal MERKLE_ROOT below and the root in the memo # # The chain proves this data was not altered. It does not prove we read # each receipt correctly: observations are validated before publication, # and whatever fails is withheld rather than published. # # When we get one wrong after publishing it, we say so here rather than # quietly. A === WITHDRAWN === section, when present, lists observations from # earlier epochs that this epoch retracts: # price-withdrawn:v1||| # is keccak256 of the published line, so you can find it in that # epoch's manifest yourself. Apply epochs in order and drop what is withdrawn; # a corrected value, where one exists, is republished here as a normal # observation. Withdrawals fold into the root below, so a retraction is sealed # as firmly as the mistake was. # # Row : price-obs:v1|||| # |||||| # |||| # kind = product | category (category = loose produce, id is a category) # discounted = 1 if the price was on offer, else 0 # Recipe : https://arweave.net/eabxr24slHrMbnZWIaKL3QiL7oitneL7y5sBHzK6EXQ # Licence : CC0-1.0 · https://creativecommons.org/publicdomain/zero/1.0/ # Public domain. Take it, republish it, build on it. # Attribution appreciated, never required. # EPOCH | 85 WINDOW_START | 2026-10-07T21:00:14.979Z WINDOW_END | 2026-10-08T21:00:15.096Z MERKLE_ROOT | aa88c39cd8da734ab6f866edefb81c4755249bdd813c51b711aab13eeb174909 OBSERVATION_COUNT | 0 RECEIPT_COUNT | 8 CATALOG_HASH | e6f919b250390e5a2df5fdbec8c168b3efd6c972679dc2b97f76231984a895e5 === OBSERVATIONS === === RECEIPT_LEAVES === 08a97a43067e3e6915dc7187793965c7a8f514af0dd57055d636cf02079f3892 89f91107b03ea8d352eadb46b36141e35e00f740c613e389768317a81a404b16 8ebdaf9eab42b272d5df8975c961d911afb9770a1e6a63db5a5c2e1d5cde05ca 948a1c444912cb1266c5858b63b09f1b67e8c7d81d1b41be40d91c3e67eca58f 9a117146e65806fcae63c66484badbfcbcfb0bae9e31c7cddbbfa95089578499 ca3438138606a955f71dfe50869f1832173ef1c77860ca578c42ed4319af19ee cf2014d1b7a540bdd91d4c937ecbbda8a546a05b6aef41f25f601c1c329ae2f9 dc251b748f615e39edac78237ac27ea2a3c890d49c16f349b193a50f782e463e