Update ERC-7730: Remove embedded ABI; keys-as-schema (#1289)
* Document ABI sourcing guidance for ERC-7730
* Make display formats the single source of contract typing
* Add Kaan Uzdogan as ERC-7730 contributor
* Update ERCS/erc-7730.md
Co-authored-by: Kaan Uzdoğan <kaanuzdogan@hotmail.com>
* Remove the abi from ERC7730 json schema and examples
* savepoint
* savepoint
* Restore token formatting guidance and update contract paths
* Align examples with underscore-free parameter naming
* mention abi deprecation
* Validate format keys as function signatures
* Enforce format key syntax and clarify schema indexing
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Co-authored-by: Kaan Uzdoğan <kaanuzdogan@hotmail.com>
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