VIP: @delegate decorator

[charles-cooper]

Simple Summary

add a @delegate decorator which automatically moves code into external contracts

Motivation

because of the EIP-170 codesize limit, developers often end up splitting logical contracts into multiple physical contracts, delegatecalling into them as necessary. we could abstract this away by providing a @delegate decorator, which specifies for the given function to be inserted into an external contract, and then delegatecalling into the external contract.

Specification

add a @delegate decorator, which is only valid on @external functions. during contract initialization, the auxiliary contract is also created and saved in the main contract's bytecode. in the selector table, if the function is called, the calldata is forwarded to the auxiliary contract using delegatecall.

depending on how many delegate'd functions there are, multiple external contracts can be created, thus not requiring any given logical contract to be required to be split over multiple files.

Copyright

Copyright and related rights waived via CC0