ink! V4 Metadata JSON schema

[XY-Wang]

Hi,

We're currently working on our W3F grant to decode verified ink! contract messages and events for our contracts explorer. Since verification is only possible for contracts written with ink! v4.0.0-alpha.3 onward, we would need a ink-v4-schema.json to validate metadata prior to decoding.

We are currently using a manually-patched version on top of the ink-v3-schema.json provided in this repo but ideally we would want to use the officially generated version.

Is there any plan to provide the V4 schema or a tool to generate it?

Thanks!

[HCastano]

Yes, there are plans but it probably won't happen until some of the other 4.0 related issues get sorted (as mentioned here).

The 4.0 metadata format has been finalized, so there's nothing blocking this other than developer time. Is this something you'd be interesting in picking up?

[XY-Wang]

So, I did a quick-and-dirty patch across the three repos ink, cargo-contract and scale-info, following mostly the changes in your branch, and generated the new V4 schema.

I validated the schema against example contracts Flipper, Incrementer and our own Crowdfund contract built with cargo-contract2.0.0-beta and against the example contracts ERC20 and Payment-Channel built with cargo-contract2.0.0-beta.1.

You can find the V4 schema here: https://gist.github.com/XY-Wang/b54d3b4a14d12df7e273c5eece274682

Please let us know if it works for you 😺

[SkymanOne]

Formal definition has been updated on master. And some groundwork has been done to automatically generate the definition in #1765

We are now just left with use-ink/cargo-contract#1090

[SkymanOne]

Closed via use-ink/cargo-contract#1090