Escrow Contract

The Escrow Contract manages the tokenized representations of both collateral and bonds. It ensures proper collateralization of hTokens through a combination of open wrapping/unwrapping functions and access-controlled minting and burning. It also facilitates settlement and redemption workflows through integration with the Harbor market contract (hook).

Key Responsibilities

• Token Wrapping: Convert underlying collateral into wrapped forms (e.g., UNI → hUNI) and back
• Bond Collateralization: Lock and release bond NFTs as collateral
• Access Control: Only market contracts can deposit and withdraw bond NFTs
• (Planned): Manage redemption and settlement of matured bond positions

Core Functions

interface IEscrow is ERC20 {
    // Corresponding token
    address public immutable underlying;
 
    // Public: wrapping/unwrapping collateral
    function wrapToken(uint256 amount) external;
    function unwrapToken(uint256 amount) external;
 
    // Role-restricted: bond management
    function depositBond(address issuer, uint256 tokenId, address from) external;
    function withdrawBond(address issuer, uint256 tokenId, address to) external;
 
    // TODO:
    function redeemBond(address issuer, uint256 tokenId) internal;
}