Dynamic msg TL-B - JSON decoding + chainlink-ton-extras pkg

[krebernisak]

This PR simplifies and makes TL-B - JSON decoding dynamic, and adds a new chainlink-ton-extras Nix pkg to host the explorer bin and other extras (tools) we'd want to package.

nix shell .#chainlink-ton-extras \
  -c explorer https://testnet.tonscan.org/tx/<TXID>

Try this branch directly:

nix shell 'github:smartcontractkit/chainlink-ton?ref=feat/json-decode'#chainlink-ton-extras \
  -c explorer https://testnet.tonscan.org/tx/<TXID> --max-pages 1000

[github-actions]

👋 krebernisak, thanks for creating this pull request!

To help reviewers, please consider creating future PRs as drafts first. This allows you to self-review and make any final changes before notifying the team.

Once you're ready, you can mark it as "Ready for review" to request feedback. Thanks!

[patricios-space]

Awesome work you did here. The only mistake I noticed is what Nico already pointed out about the error message.

[krebernisak]

We'll rethink the lib.ContractDecoder as the decoding becomes more dynamic, for now keeping it in this PR to match existing infra.

[krebernisak]

The lib.ContractDecoder implementations are now simplified and made dynamic from bindings TLB types and error code definitions. It's now a thin layer that can potentially be removed in a followup.

I've left it in this PR as the explorer util depends on it - to not introduce more breaking changes.

There's still some custom event decoding left in specific lib.ContractDecoder implementations, but this can also be generalized and removed in a followup.

cc @patricios-space

[jadepark-dev]

Looks awesome, I wonder if we'll need a diff check for generated files

[patricios-space]

I would like some documentation on how to update the generated code, and we need to get rid of the binary. Otherwise, looks good! Explorer decoding is working again 🚀

[patricios-space]

LGTM