NFT Rewards can be attached to a project's funding cycles, allowing any payment made to the project to also qualify for the minting of an NFT along any number of tiers.
Each project can deploy NFT rewards with customizable parameters. Each tier can be specified to have:
Contribution floor specified in ETH or USD, the minimum contribution necessary to mint an NFT from the tier.
Reserved rate, specifying the number of NFTs from the tier that can be minted to a predefined beneficiary address as a proportion of NFTs minted to contributors.
Voting units, specifying a number to associate with NFTs from each tier that can be used in on-chain or off-chain governance.
A URI, overridable by a URI resolver that can return dynamic values for each unit with the tier.
A flag specifying if the contract's owner can manually mint from the tier on-demand.
A lock date, before which the tier must remain accessible.
The NFT Rewards contract's owner can add and remove tiers on demand, subject to flags passed in at the time of its creation:
If the contract is set to lock reserved token changes, new tiers cannot have a reserved rate.
If the contract is set to lock voting unit changes, new tiers cannot have voting units.
If the contract is set to lock manual minting changes, new tiers cannot allow manual minting.
If the contract is set to have transfers pausable, a funding cycle metadata flag will determine if NFTs are transferable while the cycle is active.
Incoming payments can directly specify any number of tiers to mint from within their JBDidPayData.metadata.
If a payment received does not meet a minting threshold or is in excess of the minted tiers, the balance is stored as a credit which will be added to future payments and applied to mints at that time. A flag can also be passed alongside a payment to avoid accepting payments that aren't applied to mints in full.
The NFT Rewards contract can be used for on-chain governance. At the time of the contract's creation, the deployer must specify if vote delegation should be accounted for across all tiers (compatible with Governor contracts), on a per-tier basis, or if there should not be any extra governance accounting affordances.