The problem Omni-FI solves

OmniFi — Automated Cross-Chain RWA Vault

Built for the Chainlink Chromion 2025 Hackathon

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I. Overview

OmniFi is a cross-chain, automated vault protocol that brings real-world assets (RWAs) such as carbon credits into the decentralized finance (DeFi) ecosystem. It uses Chainlink services to enable:

• Real-time valuation through price feeds
• Risk-aware rebalancing using automation
• Secure cross-chain transfers through a mint-and-burn coordination process powered by Chainlink Functions

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II. Key Features

• RWA Tokenization:
  Users can mint dynamic ERC-20 tokens representing RWAs like carbon credits directly on Avalanche Fuji.

• Live Price Valuation:
  Chainlink Data Feeds fetch up-to-date ETH/USD prices to value deposits accurately.

• Volatility-Aware Automation:
  A custom volatility index monitors market shifts. If it exceeds a 5% threshold, Chainlink Automation triggers vault rebalancing.

• Cross-Chain Transfers:
  Manual transfers are handled via a secure mint-and-burn mechanism. Execution is coordinated using Chainlink Functions.

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III. Chainlink Services Used

• Chainlink Data Feeds
  Used for real-time ETH/USD pricing to ensure accurate RWA token valuation.

• Chainlink Automation
  Automatically rebalances vaults across chains if volatility exceeds 5%.

• Chainlink Functions
  Coordinates mint-and-burn logic for safe manual transfers across chains.

• Simulated CCIP Functionality
  Due to technical limitations (CCIP requiring verified tokens), we used Chainlink Functions to simulate cross-chain execution logic securely.

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IV. Architecture Flow

• Users connect MetaMask and mint RWA-backed ERC-20 tokens on Avalanche Fuji.
• Vaults use Chainlink Data Feeds to track asset value.
• A custom volatility index is continuously monitored.
• If volatility exceeds 5%, Chainlink Automation rebalances assets across chains.
• Manual transfers burn tokens on one chain and mint on another, triggered through Chainlink Functions.
• Yield-aware routing and logic handled onchain.

View Architecture Diagram

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V. Tech Stack

• Frontend: Next.js, Tailwind CSS
• Smart Contracts: Solidity (ERC-20)
• Vault Engine: Chainlink Automation
• Cross-Chain Logic: Chainlink Functions
• Price Feeds: Chainlink Data Feeds (ETH/USD)
• Supported Chains: Avalanche Fuji, Base Sepolia
• Wallet Integration: MetaMask
• Blockchain Explorer: Snowtrace

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VI. Smart Contracts

Smart Contracts Overview

Vault.sol

• View Vault.sol
• Chainlink Integration: Automation, Data Feeds
• Description: Handles deposits, tracks ETH/USD prices using Chainlink Data Feeds, and automates rebalancing if volatility exceeds 5%.

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TransferCoordinator.sol

• View TransferCoordinator.sol
• Chainlink Integration: Functions
• Description: Uses Chainlink Functions to fetch external yield data (via off-chain JavaScript) and coordinates secure cross-chain transfers.

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Chainlink Data Feeds —

Vault.sol

• import "@chainlink/contracts/src/v0.8/shared/interfaces/AggregatorV3Interface.sol";

• Uses

  AggregatorV3Interface

  for

  priceFeed

  .

• getLatestPrice()

  fetches

  latestRoundData()

  .
• Dynamically adjusts deposit limits and calculates volatility.

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Chainlink Automation —

Vault.sol

• import "@chainlink/contracts/src/v0.8/automation/AutomationCompatible.sol";

• Implements

  AutomationCompatibleInterface

  .

• checkUpkeep()

  monitors conditions.

• performUpkeep()

  executes automated rebalancing.

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Chainlink Functions —

TransferCoordinator.sol

• import "@chainlink/contracts/src/v0.8/functions/v1_0_0/FunctionsClient.sol";

• import "@chainlink/contracts/src/v0.8/functions/v1_0_0/libraries/FunctionsRequest.sol";

• Extends `FunctionsCli

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VII. Resources

• Live Demo: https://omni-fi-ruxn.vercel.app
• GitHub: https://github.com/chrsnikhil/OmniFi

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VIII. Built By

• Chris Nikhil — @chrsnikhil
• Aditya — @alienworld1
• UX & Testing — Team OmniFi
• Project submitted for Chainlink Chromion 2025 Hackathon

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Tagline

Tokenize. Rebalance. Transfer.
OmniFi brings real-world assets onchain with intelligent, automated cross-chain execution.

Challenges we ran into

Challenges I Ran Into

One of the core challenges we encountered was implementing seamless cross-chain token transfers while dealing with the constraints of verified tokens. Chainlink CCIP, while powerful, requires token contracts to be pre-verified, which posed a limitation for our architecture — OmniFi mints custom ERC-20 tokens dynamically based on user-submitted asset metadata (e.g., carbon credits).

Since token verification isn’t feasible for on-the-fly minting, we architected an alternative solution: using Chainlink Functions to coordinate mint-and-burn operations across chains. This allowed us to maintain secure, verifiable token state transitions without needing native CCIP integration — all while preserving flexibility for dynamic asset generation.

Designing and testing this orchestration layer to mimic CCIP-like behavior using Chainlink Functions took careful planning and debugging. In the end, this workaround allowed us to retain the cross-chain guarantees we envisioned without compromising technical feasibility or security.