Create unique 'seller_key' when user pushes an offer to the Marketplace about zano

[cryptozoidberg]

@kekzploit thanks for the valuable proposal, we'll work on it as soon as we finish with delivering main net for Zarcanum, hope it's not tool late, so far i would suggest as workaround use one of the fields ("cnt" for example) and keep there alias, of course it's not validated, but at least to build some codebase around. When we get to this point we'll add field that will hold alias and be validated that it actually belong to it.

[zAnonKekz]

For further clarification, each wallet has a unique "vendor_key" which is cryptographically unique and derived from the wallet. This key should then be visible within the json response of the offers created by that wallet; for example:

{
  "id": 0,
  "jsonrpc": "2.0",
  "result": {
    "offers": [
      {
        ...
        "vendor_key": "3hg56uyk2g456k35g62h4il56uh2i35yugyi53g62iu53hb..etc"
      }
    ],
    "status": "",
    "total_offers": 0
  }
}

[zAnonKekz]

yes, the alias is good!

[zAnonKekz]

I thought, there should still be something unique returned in the event a user doesnt have an alias!