v1-contracts
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Doesn’t woks with ᴇʀᴄ20 tokens which always returns nothing.
Not that Vyper uses RETURNDATASIZE, but the used memory location for returning data always contains nothing…
This results in the same as https://medium.com/coinmonks/missing-return-value-bug-at-least-130-tokens-affected-d67bf08521ca
If it returns nothing it is not erc20. ERC20 requires that transferFrom and transfer return bool.