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Namoshi offers a flexible discount system that allows users to register domains at reduced costs. This system is modular and supports multiple types of validation logic.

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Discount Validators

Namoshi uses IDiscountValidator implementations to check if a user is eligible for a discount. The main validator types are:

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Referral System

The SecureReferralDiscountValidator allows users to register domains using a referral code.
  • Discount: Users get a % off the registration fee.
  • Security: The referral code is cryptographically verified to ensure authenticity.

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NFT Ownership

The ERC721DiscountValidator and MultipleNFTDiscountValidator grant discounts to holders of specific NFT collections.
  • Check: The contract verifies balanceOf(user) > 0 for the configured NFT contract.
  • Stacking: With MultipleNFTDiscountValidator, holding NFTs from multiple collections can stack discounts (up to a limit).

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Whitelists

The MerkleWhitelistDiscountValidator allows for efficient on-chain whitelist verification.
  • Merkle Proof: Users submit a Merkle proof along with their registration to prove they are in the whitelist.
  • Gas Efficient: Only the root hash is stored on-chain.

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Applying Discounts

To use a discount, pass the appropriate data to the registerWithDiscount function on the controller: 
function registerWithDiscount(
    string memory name,
    address owner,
    uint256 duration,
    address resolver,
    bytes[] memory data,
    bool reverseRecord,
    uint16 fuses,
    uint64 wrapperExpiry,
    bytes memory discountData
) public payable;
The discountData parameter contains the proof or signature required by the active DiscountValidator.