VIP: Inject constants and structs into ABI output

[fubuloubu]

Simple Summary

Inject constants and structs into ABI output

Motivation

The ABI is a living document, and there is no specific reason why additional types can't be added to it, to help facilitate working with a specific contract. Two things in particular would be extremely helpful: defined constants, and structure definitions.

Specification

Since the ABI JSON format is an array of interface types, this makes it hard to work with. This approach will need specific handling by tools in order to function properly:

[
  {
    "name": "THIS_IS_MY_CONSTANT",
    "type": "uint256",
    "value": "100000"
  },
  {
    "name": "MyStruct",
    "type": [
      {"name": "memberA", "type": "address"},
      {"name": "memberB", "type": "bytes32"}
    ]
  },

  {
    "inputs": [{"name": "val", "type": "MyStruct"}]
  }
]

Backwards Compatibility

Not compatible with ABI v2

Dependencies

No dependencies

References

https://docs.soliditylang.org/en/latest/abi-spec.html

Copyright

Copyright and related rights waived via CC0

[charles-cooper]

related/dup: #2835