Private prediction markets · on Miden [ MIDEN ]

Bet without
being watched.

Public, trustworthy odds — but your position, size and P&L stay private. On every other chain, your bets are visible. Here, the network records only a commitment.

Public
Odds, prices & resolution
Private
Your side, size & P&L
0
Positions visible on-chain
Miden
Built on testnet

The privacy unlock

[ 01 ]

Public chains watch you.
Subrosa doesn't.

On a public market, everyone sees who holds what, how big, and their running P&L — which invites front-running and copy-trading. Miden makes accounts and notes private by default, so a position is confidential until you choose to reveal it. Odds stay public, because you want honest prices.

What's exposedPublic chainSubrosa
Holder identityvisibleprivate
Running P&Lvisibleprivate
Agent strategycopyableconfidential
Market oddspublicpublic

How it works

[ 02 ]

Three layers. One private position.

CLIENT

In-browser proving

A web app with client-side execution and STARK proving — plus a confidential agent runner. Your keys and state never leave the device.

PROTOCOL ON MIDEN

Public market, private notes

A public market account holds collateral and AMM odds. Position notes are private YES/NO shares; a constant-product (CPMM) curve keeps the odds liquid.

MIDEN BASE

Commitments only

STARK proofs; the network stores only cryptographic commitments. No positions, balances or identities on-chain.

THE FLOW › Spend collateral → the market mints a YES note into your private account → public odds move, but the position is just a commitment → nobody sees who bet, which side, or how much.

Confidential agents

[ 03 ]

A visible strategy is a copyable strategy.

Agents trade from private accounts — their book and edge can't be copied, so an edge doesn't decay the moment it's seen. Risk runs on Miden's programmable auth: autonomous up to a size cap, human co-sign above it.

0
Strategy bytes on-chain
2-of-N
Guardian co-sign above cap
Deploy an agent ›
Private account 0x9f3a…e201
delta-neutral-01
Delta-neutral basket
TRADING
Strategy & book ••••••
Programmable auth AUTONOMOUS
$3,180 deployedcap $5,000
14 markets · 12d P&L••••

Live markets

[ 04 ]

A market that can't watch you.

Open all markets ›
Coming to Miden · mainnet ~July 2026

Private positions.
Public odds.

Confidential markets. Confidential agents. Your edge stays yours.

Launch app › Read the brief