ChainLinkDataConsumer

Introduction

The ChainLinkDataConsumer contract is a utility component within the protocol, designed to provide real-time, reliable token price data using Chainlink’s decentralized oracle network. Its primary purpose is to normalize and convert the yield generated from different staking tokens (e.g., stETH, wBTC, cbETH) into a common base currency, such as USD. This normalization is crucial for accurately aggregating yield across various DepositPools and ensuring fair distribution of MOR rewards, regardless of the asset type contributed by users.

The contract supports the composition of multiple Chainlink feeds into a single price path (e.g., cbETH/ETH/USD), which allows for flexible and accurate multi-hop price resolution. These paths are referenced via unique string identifiers and stored as a hash in the contract’s mapping structure. Though the contract does not calculate MOR rewards directly, it provides the foundational price data necessary for consistent yield evaluation.

Key Responsibilities

1. Composable price path resolution: supports multi-step Chainlink feed composition using stored feed sequences.

2. Accurate yield normalization: normalizes yield values to a unified base unit (18 decimals, typically USD), enabling consistent reward calculations.

3. Dynamic feed configuration: allows the owner to register or update Chainlink data feeds by providing token path identifiers and feed arrays.

4. Chainlink oracle integration: queries live Chainlink aggregators and computes composite price outputs with correct decimal adjustment and error handling.

Storage

dataFeeds

The Chainlink data feed addresses. dataFeeds[<pathId>]

mapping(bytes32 => address[]) public dataFeeds;

Write functions for the contract owner

updateDataFeeds

Updates the list of Chainlink price feed contracts for specified paths. Only callable by the contract owner.

function updateDataFeeds(
  string[] calldata paths_,
  address[][] calldata feeds_
) external onlyOwner

Name	Description
paths_	Array of unique feed path strings (e.g., ["ETH/USD"])
feeds_	Array of feed address chains, each corresponding to a path. Can include multiple hops (e.g., [ETH/USD, USD/DAI])

Read functions

getPathId

Returns a bytes32 hash of a feed path string. Used to access stored feeds in the mapping.

function getPathId(string memory path_) public pure returns (bytes32)

Name	Description
path_	The string representing the feed path.

decimals

Returns the standard number of decimals used for price normalization. Returns 18 as standard

function decimals() public pure returns (uint8)

getChainLinkDataFeedLatestAnswer

Fetches the latest value from the Chainlink feeds assigned to a specific path ID. Handles multi-hop price feeds (e.g., ETH → USD → EUR).

function getChainLinkDataFeedLatestAnswer(
  bytes32 pathId_
) external view returns (uint256)

Name	Description
pathId_	The hashed identifier of a feed path.

supportsInterface

Used for interface detection (ERC165). Returns true if the contract supports a specific interfaceId_. Supports IChainLinkDataConsumer, IERC165.

function supportsInterface(bytes4 interfaceId_) external pure returns (bool)

version

Returns the current version of the contract.

function version() external pure returns (uint256)