[TZIP-012] Fail to parse Token Metadata located in tezos-storage URI about taquito HOT 3 CLOSED

Hey team! Please add your planning poker estimate with Zenhub @hui-an-yang @roxaneletourneau @zainen

from taquito.

Hello @pewulfman, thanks for writing this ticket. I looked a bit further into your contract at KT1FzbvvG8Y6GE4VU7iyGqT7M5TLWzKkDC5X.

And I found a few things that explain why parsing failed in Taquito. Taquito follows the Tzip12 format as stated here https://gitlab.com/tezos/tzip/-/blob/master/proposals/tzip-12/tzip-12.md#token-metadata.

Taquito expects what we call a MichelsonMap object, and specifically for token metadata, this form:

{
  name: "",
  symbol: "",
  decimals: "",
}

The error that you are receiving, as you have already stated above, is due to Taquito not being able to find the decimals key in your object (specifically Token 0 and 2).

And looking into the contract in tzkt, Token 0 metadata looks like this:

While we can physically see the Tzip12 metadata format correctly nested inside data, it's not expected for Taquito to receive extended forms of the metadata, or do any parsing for non-standard forms of it. The correct example of metadata would be in the direct map as you have written for Token 1 and 3.

Having said that, I don't think we can support the format you are using. While it is reasonable request, we would like to keep Taquito to be as in-line and compliant with Tzip12 as possible. Please let us know if you have any other concerns.

from taquito.

We have suggested an approach that Taquito supports and that is compliant with tzip-12. Closing

from taquito.