Non Fungible Apes (or NFAs) are a cryptographically generated set of 1,000 unique, rare, and immutable apes forked from the original CryptoPunks codebase.
Find the official Non Fungible Apes smart contract deployment at this address: 0x0A3eDC4af385eEC12311EC29a95F573Bb4B0ACB4
Each ape was created by processing a string (such as "Strong Ape"), resulting in a hash that is used to randomly select a set of 6 characteristics: Base Color, Face Color, Frame, Mouth, Eyes, and Top. These 6 characteristics are layered on top of each other to generate a unique NFA. Accounting for all permutations, there are a total of over 125,000 potential options, but only a very scarce set of 1,000 apes were created. See a list of all attributes in the info folder.
Each ape has a cummulative score generated based on the combined rarity of its characteristics. Basically the rarity of each individual charactistic is multipled to create an overall "Rarity Score" for the ape. The closer that score is to 0, the more rare the ape.
We then categorize that score into one of five different tiers to determine overall rarity. The rarity tiers are as follows:
- Common Chimps: Tier 1 (500 NFAs) - Most common
- Original Orangutans: Tier 2 (250 NFAs)
- Alluring Apes: Tier 3 (150 NFAs)
- Prime Primates: Tier 4 (70 NFAs)
- Magic Monkeys: Tier 5 (30 NFAs) - Most rare
Each characteristic has a different likelihood of occurring in each ape generation, making some characteristics much more rare than others. For instance, only 32 apes have lazer eyes and only 107 apes have sunglasses. You can see the full breakdown of how many occurances each characteristic has in the apesAttributeStats.json file.
The original collage of all Non Fungibles Apes (images/apes.png) has been hashed into the official smart contract deployment as the imageHash variable directly in the solidity code (value of 51c1ff5e026a655aa4cef7980525d4518bf21dcfc241be530e26d549d1cf5908).
If you'd ever like to verify a hash for yourself, you can take a SHA256 hash of the apes.png file in the images folder (e.g., openssl sha256 apes.png) and ensure it matches the value in the official smart contract deployment.