UPAY3FOODInstall
08-proofs/2026-10-11-transparency-anchor

Proof · methodology and calculation code anchored on Solana mainnet

tags
#proof#proofs
date
2026-10-11
reading
1 min · 266 words
links
0 out · 2 in

Status: CONFIRMED (reported by the site after signing; re-check with "Verify" on /transparencia or on Solscan)

On 2026-10-11, the founder signed one SPL Memo transaction from Phantom on /transparencia. The memo carries the SHA-256 of the public methodology and of the code that computes every number UPAY3FOOD shows. It moves no funds; it costs only the network fee.

Receipt

Field Value
Network Solana mainnet-beta
Program SPL Memo MemoSq4gqABAXKb96qnH8TysNcWxMyWCqXgDLGmfcHr
Signature 3NcV2SHoB2cvcg15goPEVxk3crjrAjbntXhC5bhc8SAr8uiaQm5f1axFxRzyNLfQr8Vh7BzUGVaPJQaB1u5QaRaK
Slot 455501588
Wallet Phantom
Provider RPC Fast through the same-origin server proxy

Explorer: https://solscan.io/tx/3NcV2SHoB2cvcg15goPEVxk3crjrAjbntXhC5bhc8SAr8uiaQm5f1axFxRzyNLfQr8Vh7BzUGVaPJQaB1u5QaRaK

Memo

UPAY3FOOD transparency v1 | methodology sha256:8fde83dd3d912d2c18d4da2af1fbe814d1be43a08c5349f9d0a1c3cb0acacc66 | engine sha256:0b0a87495a679debf0c01017039a6f01b92b172a4015229d5193e751b0b341fa | commit 3d2843c

Check it yourself

From a clone of the repository, at commit 3d2843c or any later commit that has not changed these files:

sha256sum docs/05-architecture/price-calculations.md
# 8fde83dd3d912d2c18d4da2af1fbe814d1be43a08c5349f9d0a1c3cb0acacc66
cat packages/domain/src/insights.ts packages/domain/src/liquids.ts packages/domain/src/burger.ts \
    packages/domain/src/volume.ts packages/domain/src/text-readers.ts packages/agent/src/menu-advisor.ts | sha256sum
# 0b0a87495a679debf0c01017039a6f01b92b172a4015229d5193e751b0b341fa

If a later version changes the methodology or the engine, its hashes change and a new anchor is needed; the site shows which version each anchor matches.

What this proves, and what it does not

  • It proves these exact rules existed, unchanged, at slot 455501588.
  • It does not prove that every number on the site is right; it makes any later change to the rules visible.
  • No price, user data, address or personal data is on-chain: only hashes and a commit id.

Linked mentions 2