Bonds

Harbor considers a bond to be any Non-Fungible Token that represents ownership of locked tokens that will become unlocked in the future (also called a vesting NTF, etc). Bonds are only accepted from whitelisted issuers to ensure that all bonds in the system will work correctly. All bonds must either implement the IHarbor.sol interface, or utilize an adapter which presents the required information in the correct format.

interface IHarbor is IERC721Enumerable {
    /**
     * @notice Reference data postion needed to calculate offers.
     *
     * @param underlying Address of the underlying token 
     * @param faceValue Face value of the bond
     * @param duration Total duration of the lock in seconds
     * @param created Timestamp of when the lock was created
     * @param maturity Timestamp of when the lock matures
     * @param redeemed Flag indicating whether the locked tokens have been redeemed
     */
    struct ReferenceData {
        address underlying;
        uint256 faceValue;
        uint256 duration;
        uint256 created;
        uint256 maturity;
        bool redeemed;
    }
}