Nicolás Venturo 8204f6a71f Improved some ERC721 internal shenanigans (#1450) ...

* Made _clearApproval private, added clarifying comments in _addTokenTo and _removeTokenFrom.

* Added approval information.

2018-10-18 19:07:34 -03:00

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ERC20

Deleted unnecessary import. (#1437)

2018-10-18 18:43:44 -03:00

ERC721

Improved some ERC721 internal shenanigans (#1450)

2018-10-18 19:07:34 -03:00