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Contracts Overview

Three main contracts compose the IFA Oracle Price Feed System.

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Contract Architecture

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Contracts

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1. IIfaPriceFeed (Interface)

  • Purpose: Standard interface and data structures
  • Location: src/IIfaPriceFeed.sol
Key Structures: 
struct PriceFeed {
    int256 decimal;          // Precision (-30 to 30)
    uint256 lastUpdateTime;  // Last update timestamp
    uint256 price;           // Price with decimal scaling
    uint256 roundId;         // Round tracking
}

enum PairDirection { Forward, Backward }

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2. IfaPriceFeed (Main Contract)

  • Purpose: Price storage and exchange rate calculations
  • Location: src/IfaPriceFeed.sol
Key Features:
  • 30-decimal precision price storage
  • Real-time exchange rate calculations
  • Batch operations support
  • Access control for updates
Core Functions: 
function setAssetInfo(bytes32 assetId, PriceFeed memory priceFeed)
function getAssetInfo(bytes32 assetId) returns (PriceFeed memory, bool)
function getPairById(bytes32 asset0, bytes32 asset1) returns (DerivedPair memory)

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3. IfaPriceFeedVerifier (Validation Contract)

  • Purpose: Price data validation and routing
  • Location: src/IfaPriceFeedVerifier.sol
Key Features:
  • Relayer permission management
  • Price data validation
  • Secure routing to main contract
Core Functions: 
function submitPriceFeed(bytes32[] calldata assetIds, PriceFeed[] calldata priceFeeds)
function setRelayerNode(address relayerNode)

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Contract Interaction Flow

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Deployment Order

  1. Deploy IfaPriceFeed
  2. Deploy IfaPriceFeedVerifier with relayer address
  3. Connect verifier to price feed: priceFeed.setVerifier(verifier)

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Access Control

  • Owner: Full administrative control
  • Verifier Contract: Can update prices in main contract
  • Relayer Node: Can submit data through verifier
  • Public: Read-only access to price data