Chainlink Keepers and VRF now live on Fantom

Chainlink Keepers and VRF now live on Fantom

Fantom remains committed to bringing best-in-class smart contract infrastructure to our developer community. This is why we natively integrated Chainlink Price Feeds, giving developers access to high-quality price data to power a variety of DeFi applications. To enable developers to further improve the security and functionality of decentralized applications on Fantom, we’re excited to announce that Chainlink Keepers and Chainlink VRF are now live on Fantom mainnet.

Chainlink Keepers is a decentralized transaction automation service and allows developers to automate any smart contract function using custom triggers. Developers can specify predefined conditions that Chainlink Keepers continuously check, and when those conditions are met, Chainlink Keepers issue on-chain transactions that trigger the smart contract’s functions to execute autonomously. By outsourcing DevOps tasks to Chainlink Keepers, smart contract developers in the Fantom ecosystem can build more advanced, feature-rich dApps that are fully automated and decentralized end to end.

Chainlink VRF is a powerful solution for Fantom developers needing a highly secure and transparent RNG. Fantom developers can now start using Chainlink VRF to build decentralized applications that leverage verifiable randomness to help secure NFT minting, generate fair in-game outcomes in blockchain games, randomly select governance participants for specific tasks, and a wide range of additional use cases across, DeFi, NFTs, DAOs, and more.

Smart contracts can’t trigger themselves—they need an external entity to trigger on-chain transactions to wake them up. While certain applications such as automated market makers (AMMs) can rely on user transactions to run their embedded logic, many smart contracts need an external entity called a “keeper” to make a transaction when predefined conditions occur. These conditions can include the passage of time, a specific event occurring, complex calculations, and more. One way to do this is for the development team to manually monitor these conditions through a centralized server. However, this introduces a central point of failure and consumes precious developer resources that could otherwise be spent improving the dApp. In addition, using manual and centralized processes raises the risk that the contract will be triggered late or won't be triggered at all. Instead of taking on this security and reliability risk, developers can outsource their on-chain DevOps tasks to Chainlink Keepers. For inspiration on what you can do with Keepers, see Smart Contract Automation Use Cases Unlocked by Chainlink Keepers.

Some of the specific benefits that Chainlink Keepers provide to development teams include:

  • Decentralized Execution — Chainlink Keepers provide reliable, trust-minimized automation with no single point of failure, mitigating risks around manual processes and centralized servers.
  • Increased Efficiency — Projects that use Chainlink Keepers can reduce time spent on DevOps, minimize operational overhead, and streamline development workflows.
  • Enhanced Security — Tamper-proof, Sybil-resistant Chainlink Keepers sign on-chain transactions themselves, enabling automated smart contract execution without exposing private keys.
  • Reduced Costs — Chainlink Keepers perform efficient off-chain computation for smart contracts, allowing developers to build feature-rich dApps at lower costs.

Ultimately, this integration means that Fantom developers are now able to bolster the security of their smart contract DevOps tasks, minimize workload, provide enhanced uptime guarantees, add advanced features, decrease the go-to-market time for their dApp, and ultimately simplify the user experience for the Fantom community. If you’d like to get started building with Chainlink Keepers, refer to the developer documentation and start submitting jobs.

“RoboVault’s delta-neutral strategies require the highest degree of reliability and security possible. During times of heightened market volatility, positions must be rebalanced in a timely manner to ensure that strategies stay with their predefined parameters and minimize exposure to market movements. The best-in-class smart contract automation services of Chainlink Keepers help ensure that the encoded functions will be performed with higher assurances.” ‒ smoothBot, Robovault Co-founder

With a wide range of new features based on extensive research and user feedback, Chainlink VRF offers developers a randomness solution that is highly configurable, scalable, and cost-efficient. For an in-depth exploration of what’s possible with Chainlink VRF, check out 35+ Blockchain RNG Use Cases Enabled by Chainlink VRF.

Integrating Chainlink VRF provides developers with a range of benefits, including:

  • Cost-Efficient Randomness Requests — Chainlink VRF includes a subscription management app that lets smart contract applications fund multiple requests for random values using a single token balance managed by the subscription owner. Users only need to fill up their subscription balance once, reducing the cost of using VRF significantly.
  • Variable Callback Gas Limit — Chainlink VRF allows users to adjust the callback gas limit to a 2.5M gas maximum. This enhancement enables smart contracts to execute more sophisticated smart contract logic in the same transaction that delivers verifiable randomness, making the execution of critical tasks involving randomness reliable even during times of network congestion.
  • Multiple Random Outputs in a Single Request — Chainlink VRF leverages a VRF Coordinator contract that lets users request multiple random numbers in a single transaction. In addition, the fulfillment of randomness is also delivered with a single transaction, lowering costs and reducing response latency.
  • Subscription Delegation Between Multiple Addresses — Chainlink VRF allows up to 100 smart contract addresses to fund their randomness requests from a single subscription balance managed by the subscription owner. This upgrade saves on gas costs and simplifies funds management for developer teams who operate multiple smart contracts needing verifiable randomness.

“To build our novel multi-chain prediction market protocol, we needed to integrate a full set of decentralized tools to bring fairness and transparency to our platform. The combination of Chainlink Price Feeds, VRF, and Keepers unlocks a secure prediction market protocol featuring high-quality market data, tamper-proof randomness, and hyper-reliable smart contract automation.” ‒ Kmz, UltiBets Founder

“The native launch of Chainlink Keepers and Chainlink VRF on Fantom is an exciting moment for our ecosystem as these services enable developers to increase the utility and security guarantees of their applications Chainlink VRF empowers developers to incorporate fair random outcomes in their dApps.” ‒ Michael Kong, Fantom CEO

“We’re excited to support the Fantom ecosystem with the native integration of Chainlink Keepers and Chainlink VRF. With access to a secure source of automation and randomness, Fantom developers can now develop more advanced hybrid smart contract applications that further drive innovation in the Web3 space.”‒ Sergey Nazarov, Chainlink Co-founder.

Chainlink is the industry standard for building, accessing, and selling oracle services needed to power hybrid smart contracts on any blockchain. Chainlink oracle networks provide smart contracts with a way to reliably connect to any external API and leverage secure off-chain computations for enabling feature-rich applications. Chainlink currently secures tens of billions of dollars across DeFi, insurance, gaming, and other major industries, and offers global enterprises and leading data providers a universal gateway to all blockchains.

Learn more about Chainlink by visiting or reading the developer documentation at To discuss an integration, reach out to an expert.

About Fantom

Fantom is a fast, scalable, and secure layer-1 EVM-compatible platform built on a permissionless aBFT consensus protocol. On Fantom, transactions are confirmed in about 1 second and cost just a few cents. Speed, low transaction costs, and high throughput make Fantom ideal for DeFi applications and real-world use-cases.

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