🍬Rarities

DeadRare has its own method of calculating the rarity of a collection. This document details the standardised equation used to provide consistency across the site.

DeadRare Rarity Calculation

DeadRare scrapes metadata from the Alephium API and uses the following formula to determine the rarity score of an NFT:

$$Score = (\sum_{i=1}^{n} \frac{1}{x_{i}} + ... \frac{1}{x_{n}}) *100$$

Where x is the percentage of that trait's availability.

Example

Figure 1 - ElrondApes#3500 index card.

$$Score = (\sum_{i=1}^{n} \frac{1}{100} + \frac{1}{6.5}+ \frac{1}{11}+\frac{1}{42}+\frac{1}{0.93}+\frac{1}{1.9}+\frac{1}{99}) * 100$$

$$Score = 191$$

​NFTs ranks are the whole collection sorted by score in descending order.

Rarity Weightings

DeadRare allows project owners to alter the significance of a rarity on a specific layer. This is done through rarity weighting. For instance, perhaps, as a project owner, you want skin variation to display higher in the rankings than any other layer. You can set a rarity weighting, which acts as a multiplier on the layer score, referring to the example using figure 1. Let’s say the project owner wants the ‘special’ layer to contribute more to the overall score.

$$Score = (\sum_{i=1}^{n} \frac{l_{i}}{x_{i}} + ... \frac{l_{n}}{x_{n}}) *100$$

$$Score = (\sum_{i=1}^{n} \frac{1}{100} + \frac{1}{6.5}+ \frac{1}{11}+\frac{1}{42}+\frac{1}{0.93}+\frac{1}{1.9}+\frac{3}{99}) * 100$$

​With the multiplier, the ‘special layer’ is now a more significant fraction and thus contributes more to the Score than other traits. By default, the weights are all set to 1. The project owner has the scope to alter the weights of all traits to any actual number.

Rarities during a mint

The rankings on DeadRare are based on NFTs in circulation at that given point, i.e. the rarest NFTs of the collection that has been minted so far.

Until a project is fully minted, the rarities are bound to change as the pool of NFTs in the collection grows, with rarer and more common ones being minted over time.