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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

The ManagedRatiosOracle contract provides ratio management for underlying tokens within a vault. It allows updating and retrieving target ratios for the vault’s assets using a 96-bit fixed-point precision system.

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Key Features

  • Ratio Management: Sets and retrieves target ratios for vault tokens.

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Error Definitions

  • InvalidLength: Raised if the number of ratios doesn’t match the number of underlying tokens or if data is absent.
  • InvalidToken: The token hash does not match the stored ratios data hash.
  • InvalidCumulativeRatio: The cumulative sum of ratios does not match the expected value.

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Constants

  • Q96: Fixed-point scaling constant (2^96) used for precise ratio calculations.

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Methods:

  1. Ratio Management
    • updateRatios(address, bool, uint128[]): Updates the target ratios for a specific vault.
      • vault: The address of the vault.
      • isDeposit: A boolean indicating whether the ratios are for a deposit or a withdrawal.
      • ratiosX96: An array of ratios, each with 96-bit precision.
      • Errors:
        • InvalidLength: The number of ratios does not match the number of tokens.
        • InvalidCumulativeRatio: Cumulative ratio sum does not match Q96.
    • getTargetRatiosX96(address, bool): Retrieves the target ratios for a given vault.
      • vault: The address of the vault.
      • isDeposit: A boolean indicating whether the ratios are for a deposit or a withdrawal.
      • Errors:
        • InvalidLength: Data is missing.
        • InvalidToken: The stored token hash does not match the current hash.
Data Structures
  • Data
    • tokensHash (bytes32): Keccak256 hash of the tokens array to ensure consistency.
    • ratiosX96 (uint128[]): An array of ratios with 96-bit precision.

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Event

  • ManagedRatiosOracleUpdateRatios(address, bool, uint128[]): Emitted when the target ratios are updated for a vault.
    • vault: The address of the vault.
    • isDeposit: A boolean indicating whether the ratios are for a deposit or a withdrawal.
    • ratiosX96: An array of updated target ratios.