I know about token registry, which is off-chain, but I noticed that some tokens such as HOSKY are not in token registry and yet they have logo, description, URL and coin name visible on pool.pm.
Is it possible to add extra metadata when minting the coin, such as it's done with NFTs? Also https://developers.cardano.org/docs/native-tokens/minting describes only most basic policy:
vi minting-policy
{
"keyHash": "your_key_hash",
"type": "sig"
}
What other keys are accepted and how do they affect the policy? Is this described anywhere in detail?