Wen Open Lab · open integration

Wen Open Lab: Open IntegrationStage 0 · Roadmap

• 0 · Roadmap
• 1 · Receipts & warranty
• 2 · Creator royalties
• 3 · B2B invoices
• 4 · Payments bridge
• 5 · Simulator
• 6 · Devnet: repeat it
• ✓ · Trust chain
• ★ · Benefits & use

Knowing what Wen is was the first step. The Lab is the second: we take the open tools behind Wen — the WNS token layout, Solana Token-2022 and Solana Pay — and build free, working models that a developer, a shop, a fintech team or a bank can study, test and reuse. Everything is open, step by step, in public.

Why this exists

The almanac explains Wen in depth: the poem, the airdrop, the WNS standard, the link with Jupiter and Solana. But description alone is not utility. Utility starts when someone can take a model, run it, check it and build on it. The Lab does exactly that, and does it in the open, so that the value of Wen's technical heritage is shared freely rather than locked away.

Where it applies

The roadmap, built in the open

1. 0 · Roadmap and rules. This page: purpose, spheres, open use policy, verification log. live
2. 1 · Receipts and warranty. A Token-2022 NFT with the WNS layout: proof of purchase without personal data, optional soulbound warranty. 12 checks passed
3. 2 · Creator royalties. Read which program enforces royalties on an NFT and transfer it so the hook runs. hook read verified
4. 3 · B2B invoices. Transfer fee, approved counterparties, mandatory invoice memo. 9 checks passed
5. 4 · Payments bridge. Solana Pay link, payment watcher, validation, webhook to the shop. link verified
6. 5 · Simulator. Compare card acquiring and on-chain payments with your own numbers. interactive
7. ★ · Benefits and use. Who gains what, where it fits, and where it does not. live
8. 6 · Devnet: repeat it yourself. A published script runs Models 1 and 3 on public devnet and prints explorer links. Anyone can repeat it with a new, empty wallet. ready to run
9. ✓ · Trust chain. Every key claim with its status and sources: verified, reported, opinion, unverified or conflicting. live
10. 6b · Public devnet run. Run the script in public and publish the addresses on the devnet page. next
11. 7 · Pay in WEN, the shop receives USDC. The buyer pays in WEN, a Jupiter swap in the same transaction converts it, the shop receives a stablecoin. Builds on Stage 4. next model
12. 8 · WNS group registration. Add receipts to a WNS collection through the official program, built from the official repository's IDL. planned
13. 9 · Royalty hook program sample. An Anchor transfer-hook program with tests, compared line by line with WNS royalty distribution. planned
14. 10 · Threat model and audit checklist. Compute limits, account substitution, zero-price transfers, key management. planned
15. 11 · Merchant plugin sketch. How an online store connects the payments bridge to its order system through a webhook. planned

Verification log

Models 1–4 are executed inside LiteSVM, a local Solana virtual machine that runs the real SPL Token-2022 and Memo programs, without network access and without real funds. The negative cases matter as much as the positive ones: a soulbound receipt must refuse to move, a payment without an invoice number must fail. Output of the last run (October 10, 2026):

PASS  M1 receipt minted (soulbound=true)
PASS  M1 supply is exactly 1, decimals 0, mint authority removed
PASS  M1 metadata inside the mint: name, order hash, warranty date  — warranty_until=2027-10-10
PASS  M1 buyer holds the receipt
PASS  M1 soulbound receipt cannot be transferred  — rejected by Token-2022
PASS  M1 nobody can mint a second copy
PASS  M1 receipt minted (soulbound=false)
PASS  M1 supply is exactly 1, decimals 0, mint authority removed
PASS  M1 metadata inside the mint: name, order hash, warranty date  — warranty_until=2027-10-10
PASS  M1 buyer holds the receipt
PASS  M1 transferable receipt can be resold or gifted
PASS  M1 nobody can mint a second copy
PASS  M3 settlement mint created (fee 0.25% cap 50, frozen by default)
PASS  M3 seller account requires an invoice memo
PASS  M3 issuer funds the buyer account
PASS  M3 payment WITHOUT invoice number is rejected  — Program log: Error: No memo in previous instruction required for recipient to receive a transfer
PASS  M3 payment to a NOT approved company is rejected (account frozen)  — Program log: Error: Account is frozen
PASS  M3 invoice INV-2026-0042 paid with memo to approved company
PASS  M3 invoice number is recorded on-chain (memo in logs)
PASS  M3 seller received amount minus fee; fee withheld for the platform  — received 997.5, fee 2.5
PASS  M3 fee cap works (fee on 100,000 is 50, not 250)
PASS  M2 NFT mint created with a transfer hook
PASS  M2 hook program read from the mint = WNS royalty distribution  — diste3nXmK7ddDTs1zb6uday6j4etCa9RChD8fJ1xay
PASS  M4 payment link round-trips: recipient, amount, token, reference, memo  — solana:WENWENvqqNya429ubCdR81ZmD69brwQaaBYY6p3LCpk?amount=10…
PASS  M4 every order gets a unique reference

ALL CHECKS PASSED

Two real pitfalls were found while building, which is exactly why the rule is "verify your own model": the npm package @wen-community/wen-new-standard has been removed as malicious, and recent versions of @solana/spl-memo point to a different memo program than the canonical one Token-2022 checks. Both are handled in the code.

Run it yourself

# get the files from lab/code/ (package.json, tsconfig.json, src/, test/)
npm install
npm run typecheck   # TypeScript, strict mode
npm test            # local Solana VM, no network, no real funds

For devnet: create a wallet with the Solana CLI, request devnet SOL, then set KEYPAIR and optionally RPC_URL before calling the send functions in each file. Start with a fresh, empty wallet.

Background reading

• Wen Open Lab review — the whole section in one story, with the devnet plan and the next model
• Wen Program Library review — the code behind WNS, section by section
• SPL, Token-2022 and WNS explained
• Solana Token-2022 and WEN: compliance and testing
• WNS 0.0, explained — the January 2024 proposal every Lab model builds on
• The launch-day stress test — how the WEN airdrop tested Solana and gave birth to WNS adoption
• More than a meme — mint, authorities and supply: what to verify in any token
• On-chain numbers, explained — public data as a public service
• Most integrated programs — usefulness counted in Solana programs
• The WNS standard, Wen by Solana 2024–2026 (PDF)

Wen in pictures

Wen Open Lab · roadmap · all code · Wen Program Library on GitHub