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Legacy architecture. Mellow-LRT is an earlier generation of Mellow vault infrastructure, documented for existing deployments. Core Vaults are Mellow’s current vault architecture.

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Overview

ChainlinkOracle contract integrates with Chainlink to provide accurate and real-time pricing data for various tokens. It manages base tokens and their associated Chainlink oracles (aggregators), ensuring reliable price conversions.

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Key Features

  • Chainlink Integration: Utilizes Chainlink Aggregators to fetch accurate pricing data.
  • Base Token Management: Supports setting and managing base tokens for price calculations.
  • Error Reporting: Raises specific errors for unsupported or stale data scenarios.

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Error Definitions

  • InvalidLength: Raised when the input arrays for tokens and oracles are not of equal length.
  • AddressZero: Raised when an address is expected but not provided.
  • StaleOracle: The data from the Chainlink oracle is older than the maximum allowable age (MAX_ORACLE_AGE).

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Constants

  • MAX_ORACLE_AGE: The maximum allowable age for Chainlink oracle data, set to 2 days.
  • Q96: A fixed-point scaling constant (2^96), used for ratio calculations.

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Core Methods

  1. Base Token Management
    • setBaseToken(address, address): Sets the base token for a specific vault.
      • vault: The address of the vault.
      • baseToken: The address of the base token.
  2. Chainlink Oracle Management
    • setChainlinkOracles(address, address[], address[]): Associates tokens with their Chainlink oracles for a given vault.
      • vault: The address of the vault.
      • tokens: An array of token addresses.
      • oracles: An array of oracle addresses matching the tokens.
  3. Pricing
    • getPrice(address, address): Retrieves the price and decimals of a token from its associated Chainlink oracle.
      • vault: The address of the vault.
      • token: The address of the token.
    • priceX96(address, address): Computes the price of a token in base token terms, using a 96-bit fixed-point representation.
      • vault: The address of the vault.
      • token: The address of the token.

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Events

  1. Base Token Events:
    • ChainlinkOracleSetBaseToken(address, address, uint256): Emitted when a base token is set for a specific vault.
      • vault: The address of the vault.
      • baseToken: The address of the base token.
      • timestamp: The timestamp when the base token was set.
  2. Oracle Setup Events:
    • ChainlinkOracleSetChainlinkOracles(address, address[], address[], uint256): Emitted when Chainlink oracles are set for tokens in a vault.
      • vault: The address of the vault.
      • tokens: Array of token addresses.
      • oracles: Array of oracle addresses.
      • timestamp: The timestamp when the oracles were set.