amaziopn
This is an automated marketplace built on IOPN, where the native currency, transaction fees, and deposits are all denominated in OPN. A sma
by poltoralice · submitted Jun 12, 2026
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Description
01/03
What the builder said.
Written by the team, rendered as the markdown they typed in the submission wizard.
What we built
FairBazaar — a digital goods marketplace where fairness is enforced by OPN Chain instead of a platform company. Sellers list license keys, vouchers, or files; buyers pay into escrow and receive the goods automatically within seconds; if something is wrong, an AI arbiter judges the dispute and publishes its verdict with full reasoning on-chain.
Live demo: https://style-printers-essex-victor.trycloudflare.com Code: https://github.com/Alicepoltora/fairbazaar
Why
Buying digital goods from a stranger is a trust deadlock: the buyer won't pay first, the seller won't deliver first. Platforms that solve this take 10–30% and own both your money and the dispute process. We replace the platform with a contract: escrow, proof of delivery, dispute court and seller reputation are all on OPN Chain. Remove the chain and nothing remains.
How it works
- List — the product is encrypted in the seller's browser (X25519/secretbox). Only ciphertext and the canonical description go out; the server stores ciphertext it cannot read.
- Buy — one click, funds lock in escrow, never sent to the seller directly.
- Deliver — the delivery agent re-encrypts the goods to the buyer's key and publishes them in a transaction. The tx hash IS the proof of delivery. Sales run 24/7 while the seller sleeps.
- No delivery? — after the delivery window the buyer claims a trustless refund.
- Dispute — the buyer stakes 10% and states a reason. The AI arbiter (LLM) judges the delivered goods against the description that was fixed on-chain BEFORE the sale, then publishes verdict + reasoning in a transaction — an auditable court anyone can review.
- Reputation — every sale and every lost dispute moves a soulbound seller score that cannot be bought or transferred.
Why OPN Chain is load-bearing (5×)
- Escrow & atomic settlement — the contract holds the money.
- Proof of delivery — key handover is a transaction, not a claim.
- Auditable AI court — every verdict is permanent public record.
- Soulbound reputation — sybil-resistant seller history.
- Trustless timeouts — refunds and payouts execute without anyone's permission.
Already live on testnet
Contract 0xd083d72298429CadF536F29278a06f7c0dC22391: real listings (including encrypted file products), purchases, automated deliveries in ~5s, disputes and published AI verdicts. Contracts covered by unit + e2e crypto tests. Try it: connect a wallet, buy a demo item, open a dispute — the verdict lands on-chain in ~30 seconds.
Roadmap
02/03
What ships next.
The builder's own next-quarter plan. Use it to gauge follow-through and ambition.
Now → Season 1 finale (Jun–Jul 2026)
- Harden the dispute court: adversarial test-suite of 50+ scripted dispute cases (fake goods, frivolous claims, ambiguous descriptions) with verdict-quality scoring.
- Refinement-window polish from Stage 2 feedback: seller storefront pages, listing search and categories.
- Explorer source verification + public dashboard of every verdict the court has ever issued.
Aug–Sep 2026 — kill the single point of trust
- Arbiter panel: three independent AI arbiters (different model vendors) vote on each dispute, majority rules, every vote a separate on-chain transaction. The court stops being one opinion.
- Arbiter staking & slashing: arbiters bond OPN; provably deviant verdicts get slashed. One-shot appeal flow with doubled stake.
- TEE delivery agent: decryption key sealed in a trusted enclave — even the operator can't read the goods. IPFS backend for product files.
Autumn 2026 — OPN mainnet
- External audit of the contracts, then mainnet deployment.
- Fee switch: the 2% marketplace fee partially funds the arbiter-staking reward pool — the court becomes self-sustaining.
Post-mainnet (from late 2026) — growth
- Seller acquisition: zero listing fees for the first 500 merchants, migration kits for sellers coming from Telegram/Discord shops and gig platforms, "verified merchant" soulbound badges minted from real trade history.
- Buyer acquisition: cashback in OPN on first purchases, referral links with on-chain attribution, co-marketing with OPN ecosystem projects and IOPn community campaigns.
- Creator partnerships: onboard digital-goods creators (templates, e-books, game keys, API access) with revenue-share spotlights on the storefront.
- Target for the first 6 months on mainnet: 100 active sellers, 1,000 completed escrow trades, dispute rate under 5% — all verifiable on-chain.
Season 2 bridge (Identity & Reputation)
The soulbound seller score becomes a portable on-chain credential other OPN dApps can read: reputation-gated limits, undercollateralized seller advances against proven sales history. Our Season 2 submission grows directly out of this contract's data.
On-chain proof
03/03
1 contract on OPN Chain.
The chain itself confirmed every deployment is valid, signed by the builder's wallet, and inside the season's window.