3

The uniqueness of an NFT comes from its minting policy, not the metadata. If you create a script that can only mint one token, then you know any token with that address as its currency symbol is unique, and thus non-fungible. One possible solution to your problem is a smart contract that holds the proof-of-ownership NFT for you. When the watch maker ...


2

Yes - this is an example of an unlocked policy. Tokens can be minted and burned under this policy forever with no limits. Here would be an example of a time-locked policy: { "type": "all", "scripts": [ { "type": "before", "slot": 28515365 }, { "type": &...


2

Official documentation unambiguously says about it: The minting parameter is now called with a negative value, therefore destroying one token. cardano-cli transaction build --mainnet --alonzo-era --tx-in $txhash#$txix --tx-out $address+$burnoutput --mint="-1 $...


2

@Mitchell Turner is right. I want to add this. In Cardano you can mint NFTs using: Native scripts: using this option you're the owner of the policy keys (files) to mint a NFT with that policy Id. Unless your keys are stolen, then nobody else could use them to mint a NFT using the same policy Id. That means, nobody can update the metadata of your NFTs. ...


1

Nope. The contents of the script itself are used to actual generate the Policy ID. Once you mint something under that policy ID it's impossible to make a change.


1

Yes, this is an example of a "one-time minting policy" referred to in the Cardano documentation. The policy ensures that only one NFT is minted by a combination of i) being parametrised with a specific UTxO that needs to be consumed by the transaction (checked by hasUTxO) and ii) checking that the total mint quantity is 1. As all UTxOs are unique, ...


1

Also you can fetch them all from blockFrost with this end point https://cardano-mainnet.blockfrost.io/api/v0/assets For a detailed explanation here is the Link https://docs.blockfrost.io/#tag/Cardano-Assets/paths/~1assets/get


1

Check https://pool.pm/tokens which seems to provide the total at the top of the page.


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