Collateral manager

Address:0x0239d1ecde6e651a45a103a367557e1b69306c6a206e5df3fa4982320dd64e54

Summary of the Collateral Manager Code

The provided code defines a Collateral Manager for a StarkNet-based decentralized application. This manager handles the collateralization of assets by interacting with vault contracts. Below is a detailed summary of the code:

Purpose

The Collateral Manager's primary function is to manage and calculate the collateralization ratio for assets deposited by users. It interacts with vault contracts to get the total value of assets and the collateral value of individual users.

Key Components

1. Interfaces:

   • IVault Interface:

     • Defines methods to get the total value of assets in the vault and the collateral value for a specific user.

     • Methods:

       • getTotalValue(ref self: TContractState) -> u128: Returns the total value of assets in the vault.

       • getAccountCollateralValue(ref self: TContractState, user: ContractAddress) -> u128: Returns the collateral value for a specific user.

   • ICollateralManager Interface:

     • Defines the method for calculating the dynamic collateralization ratio.

     • Method:

       • dynamic_collateralization_ratio(ref self:T, contract_address:ContractAddress, amount:u128) -> u128: Calculates the dynamic collateralization ratio.

2. CollateralManager Contract:

   • The main contract module implementing the Collateral Manager.

   • Storage Structure:

     • totalValue: u128: Stores the total collateral deposited.

     • collateralDeposited: LegacyMap<(ContractAddress,ContractAddress),u128>: Maps each asset's collateral deposited.

   • Function:

     • dynamic_collateralization_ratio(ref self: ContractState, contract_address: ContractAddress, amount: u128) -> u128:

       • Retrieves the caller's address.

       • Gets the total value of assets from the vault and the collateral value for the user.

       • Calculates the user's contribution to the total collateral.

       • Returns the user's contribution value, which is used in the frontend for calculating the collateralization ratio.

Calculation Process

• The function dynamic_collateralization_ratio calculates a user's contribution to the total collateral. This contribution is used to determine the collateralization ratio, but due to the limitations of StarkNet (integer-only calculations), the actual ratio calculation involving decimal operations is performed in the frontend JavaScript code.

• The JavaScript frontend uses the expression 150×(1+x+x22)/ex150 \times \left(1 + x + \frac{x^2}{2}\right) / e^x150×(1+x+2x2​)/ex, where xxx is the difference between the average collateralization ratio and the user's contribution, to calculate the final collateralization ratio.

Key Points

• The code ensures secure and efficient collateral management by interacting with vault contracts.

• The calculation of the collateralization ratio is partially offloaded to the frontend due to StarkNet's integer-only arithmetic capabilities.

• This approach provides a dynamic and responsive way to manage and assess collateral requirements for users.

By following this design, the Collateral Manager ensures that assets are securely managed and collateralization ratios are dynamically calculated to reflect the current state of the platform.