Skip to main content

​
Polymarket CTF Exchange

The Polymarket CTF Exchange is an exchange protocol that facilitates atomic swaps between Conditional Tokens Framework (CTF) ERC1155 assets and an ERC20 collateral asset.
The CTF Exchange has been audited by Chainsecurity. The audit report is available in the source repository.

​
Key Features

Hybrid-Decentralized Model

Combines offchain order matching with on-chain, non-custodial settlement for optimal performance and security

Atomic Swaps

Facilitates trustless atomic swaps between binary outcome tokens (ERC1155) and collateral assets (ERC20)

Advanced Matching

Supports three matching scenarios: Normal, Mint, and Merge operations for complementary outcome tokens

Symmetric Fees

Implements symmetric fee structure that preserves market integrity for complementary binary options

EIP-712 Signatures

Orders represented as signed typed structured data following the EIP-712 standard

Operator Model

Designated operators provide matching and execution services while settlement remains on-chain

​
How It Works

The exchange operates on a hybrid model:
  1. Offchain Matching: An operator provides matching, ordering, and execution services
  2. Onchain Settlement: All settlements happen on-chain, non-custodially according to signed order messages
  3. Maker-Taker Model: Orders are matched in either one-to-one or many-to-one (maker to taker) relationships
Price improvement from matched orders is captured by the taking agent, ensuring efficient market dynamics.

​
Get Started

How It Works

Understand the hybrid-decentralized exchange model and matching scenarios

Deployments

View production deployments on Polygon and Amoy testnet

Core Concepts

Learn about matching scenarios, fees, and order structure

API Reference

Explore the CTFExchange contract and trading functions

​
Contract Architecture

The CTFExchange contract inherits from multiple mixins that define core functionality:
  • Auth: Access control for admin and operator roles
  • Assets: Management of collateral and CTF tokens
  • Fees: Symmetric fee calculation and distribution
  • Trading: Core matching and execution logic
  • Signatures: EIP-712 signature validation with ERC-1271 support
  • NonceManager: Order nonce tracking and cancellation
  • Pausable: Emergency pause functionality
  • Registry: Registered token management
  • AssetOperations: Mint and merge operations for complementary tokens
The exchange requires operator privileges to execute trades. Only authorized operators can call trading functions.

Build docs developers (and LLMs) love

Get started for freeTalk to us