Audits

Infrastructure & Audits

Shard is built on top of Polymarket's open-source infrastructure, with a custom application layer handling the workspace, privacy routing, wallet management, and widget system.

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How It Works

Shard connects directly to Polymarket's CLOB and data API. Orders are signed locally in your wallet and submitted through Shard's Privacy Layer — the platform acts as an interface, never a custodian.

All wallet interactions are handled via Gnosis Safe, giving users full self-custody with multi-wallet support. Deposits flow directly from your wallet to Polymarket — Shard has no access to funds at any point in the flow.

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Polymarket Infrastructure

All Polymarket contracts are deployed on Polygon mainnet (Chain ID: 137).

Core Trading Contracts

Contract	Address
CTF Exchange	0xE111...996B
Neg Risk CTF Exchange	0xe222...0F59
Neg Risk Adapter	0xd91E...5296
Conditional Tokens (CTF)	0x4D97...6045

Wallet Factory Contracts

Contract	Address
Deposit Wallet Factory	0x0000...3Cc07
Gnosis Safe Factory	0xaacf...541b
Polymarket Proxy Factory	0xaB45...4052

Resolution Contracts

Contract	Address
UMA Adapter	0x6A9D...F74
UMA Optimistic Oracle	0xCB18...5130

Open-Source Repositories

Repository	Description
clob-client	Central limit order book client
order-utils	Order signing and utilities
ctf-exchange	Conditional token framework exchange
ctf-contracts	Core smart contracts
Polymarket Docs	Official protocol documentation

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Polymarket Audits

CTF Exchange V2 has been audited by two independent firms. All critical issues identified were addressed before mainnet deployment.

Contract	Auditor	Date	Report
CTF Exchange V2	Quantstamp	March 2026	View
CTF Exchange V2	Cantina	March 2026	View
CTF Exchange V1	ChainSecurity	November 2022	View
Conditional Tokens	ChainSecurity	—	View
NegRiskAdapter	ChainSecurity	April 2024	View
Proxy Wallet Factories	ChainSecurity	—	View

Security vulnerabilities can be reported through Polymarket's Cantina bug bounty program.

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Shard Custom Stack

Component	Description
Workspace Engine	Modular widget system — layout, rendering, state management
Privacy Layer	Edge Layer + Privacy Router + Header Anonymiser
Wallet Connector	Gnosis Safe integration — multi-wallet, signer switching
Partner SDK	Widget integration framework for ecosystem builders
DeFi Module	Protocol routing for Aave, Compound, Yearn on Polygon

Shard Repositories

Repository	Description
github.com/shard	—

Repositories will be made public progressively. Builder SDK documentation coming soon.

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Shard Audits

Coming soon — infrastructure audits will be published here as they are completed.