Rules and questions

You press Mint and confirm one transaction in your wallet. When it lands, the contract draws one of the punks nobody has minted yet, at random, and sends it to your wallet. The page then generates that punk's voice from its traits and shows it to you. It takes about as long as the transaction does, usually a few seconds.

No. Every punk is picked at random from the ones still left. You find out which one you got, and hear its voice, after the mint.

The contract mixes the previous block's hash, the time, your address and how many voices have been minted so far, then takes a punk from the ones still left, so a punk can never come out twice. It's fair enough for a collection like this, but it isn't a lottery-grade random oracle: the network's block producer could, in theory, lean on it.

To stop the easy trick (a program that mints, looks at the result and cancels until it gets a rare one), only ordinary wallets can mint, not other contracts.

No. There are exactly 10,000 punks, each can be minted once, and the draw only picks from the ones still left. When all 10,000 are minted, minting ends for good.

Because of the rule above: only ordinary wallets can mint. Use MetaMask, Rabby or another browser wallet, then move the voice anywhere you like.

An ERC-721 token on Robinhood Chain, numbered 0 to 9999. Its metadata carries the picture in the NFS look, the voice as a lossless WAV and the traits behind it. You don't get a CryptoPunk, and you don't need to own one.

No. Anyone can mint. Non-Fungible Sound is an independent art project, not affiliated with Larva Labs, Yuga Labs or CryptoPunks.

Every punk gets a rarity score from two things: how rare its looks are (its type, each accessory, and how many accessories it has) and how rare its voice is (what it says, the world it speaks in, and its signature sound). For each of those, the fewer punks share it, the more it adds: something only 9 punks have counts for far more than something 4,000 have. All 10,000 are ranked by that score and split into six tiers:

Mythic top 100 · Legendary next 400 · Epic next 1,000 · Rare next 1,500 · Uncommon next 2,500 · Common the other 4,500

The tier sets the colour behind the punk in its picture, and it's part of the NFT's traits, along with its exact rank from 1 (rarest) to 10,000.

Yes. It's a standard NFT: send it from your wallet or list it on any marketplace that supports Robinhood Chain, OpenSea included.

A mint costs $1, paid in ETH: the contract asks for the ETH amount worth $1, and the mint page shows it before you confirm. On top of that comes the network fee (gas), which on Robinhood Chain is around a cent or less.

Any browser wallet that works with Ethereum-style chains, such as MetaMask or Rabby. When you press Mint, the site asks your wallet to add Robinhood Chain if it isn't there yet.

Robinhood Chain uses ETH for gas. Bridge a small amount from Ethereum or Arbitrum to Robinhood Chain. A tiny amount is enough for many mints.

The contract launches soon. Its address will appear here and in the footer.

The SHA-256 fingerprint of the program that makes every voice, stored in the contract when it was created and never changeable. This site's engine hashes to …. How the engine works.