Dfyn Integrates Chainlink Price Feeds To Settle Predictions Market

Dfyn Network
4 min readSep 2, 2021


After announcing the recent launch of our predictions market, we are happy to announce an integration with Chainlink Price Feeds on Polygon mainnet, with Chainlink acting as the go-to oracle solution for the Dfyn Network.

To start, we have added the MATIC/USD Price Feed as a secure and reliable source of price data to settle our predictions market. The Dyfn prediction platform allows users to take positions on short-term price movements, with 5-minute windows acting as individual “rounds”. Users can choose either “bull” or “bear” to indicate whether they think the asset price will go up or down by the end of the round. Payouts are given out to those who chose the correct option, with a portion of the winnings used to burn our native DFYN token.

Understanding the Importance of Oracles

An oracle is a data service provider that allows smart contracts to access data and computation not native to the blockchain. Oracles are needed because blockchains cannot inherently call external APIs or easily validate external data — a limiting feature frequently known as the blockchain oracle problem. For example, a smart contract offering crop insurance would not know a drought has occurred without reliable inputs like weather data.

An oracle provider solves this problem by providing all types of outside data to smart contracts, from real-time price feeds to real-world data like regional rainfall and sporting event outcomes. Importantly, oracles aim to fetch, validate, and transmit data on-chain in a highly secure and reliable manner to bring the same trust assumptions to external data that exist for the underlying execution of the smart contract’s logic.

Why Chainlink?

Chainlink is the most widely-used and time-tested decentralized oracle network, already helping secure tens of billions of dollars in value for top DeFi protocols. Aside from providing premium quality data and robust backend infrastructure, Chainlink’s flexibility enabled the creation of a custom feed that queries every 30 seconds, helping ensure that market prices are consistently up to date.

As you can see, accurate and reliable price feeds are critical to proper functioning of any prediction market — especially considering the fast pace of our 5-minute rounds. After searching through a wide range of oracle solutions, Chainlink stood out as the best option due to key design features like:

  • High-Quality Data — Chainlink Price Feeds source data from numerous premium data aggregators, leading to price data that’s aggregated from hundreds of exchanges, weighted by volume, and cleaned from outliers and suspicious volumes. Chainlink’s data aggregation model generates accurate global market prices that are resistant to API downtime, flash crash outliers, and data manipulation attacks like flash loans.
  • Secure Node Operators — Chainlink Price Feeds are secured by independent, security-reviewed, and Sybil-resistant oracle nodes run by leading blockchain DevOps teams, data providers, and traditional enterprises. Chainlink nodes have a strong track record for reliability, even during high gas prices and extreme network congestion.
  • Decentralized Network — Chainlink Price Feeds are decentralized at the data source, oracle node, and oracle network levels, generating strong protections against downtime and tampering by either the data provider or the oracle network.
  • Reputation — Chainlink provides a robust reputation framework and set of on-chain monitoring tools that allow users to independently verify the historical performance of node operators and oracle networks, as well as check the real-time prices being offered.

Future Plans

We will soon be adding additional prediction markets secured by Chainlink Price Feeds, including LUNA, DFYN, and ROUTE! We plan to keep adding more markets as demand grows and our platform advances.

About Chainlink

Chainlink is the industry standard oracle network for powering hybrid smart contracts. Chainlink Decentralized Oracle Networks provide developers with the largest collection of high-quality data sources and secure off-chain computations to expand the capabilities of smart contracts on any blockchain. Managed by a global, decentralized community, Chainlink currently secures billions of dollars in value for smart contracts across decentralized finance (DeFi), insurance, gaming, and other major industries.

Chainlink is trusted by hundreds of organizations, from global enterprises to projects at the forefront of the blockchain economy, to deliver definitive truth via secure, reliable oracle networks. To learn more about Chainlink, visit chain.link and subscribe to the Chainlink newsletter. To understand the full vision of the Chainlink Network, read the Chainlink 2.0 whitepaper. Want to discuss an integration? Talk to an expert.

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About Dfyn

Dfyn is a multi-chain AMM DEX currently functional on the Polygon network. Dfyn nodes on various chains act as liquidity entry and exit points into the cross-chain liquidity super mesh that is being enabled by Router Protocol.

Website: https://www.dfyn.network/

Telegram: https://t.me/Dfyn_HQ

Discord : https://discord.gg/yjM2fUUHvN

Twitter: https://twitter.com/_DFyn

Telegram Announcements: https://t.me/dfynofficial

Docs: https://docs.dfyn.network/



Dfyn Network

Dfyn is the world’s first on-chain limit order DEX. It combines the power of an RFQ matching engine with a concentrated liquidity AMM.