docs: update allowances blurb (#160)

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Lawrence Forman 2021-02-25 17:11:44 -05:00 committed by GitHub
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Allowances Allowances
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.. _Allowance Target Address: https://github.com/0xProject/protocol/blob/development/packages/contract-addresses/addresses.json#L40 Both maker and taker allowance should be be set directly on the `Exchange Proxy contract <./addresses.html#exchange-v4>`_.
After the official release, allowances will be set directly on the Exchange V4 Proxy contract. For takers, legacy allowances set on the `Allowance Target <./addresses.html#exchange-v4>`_ will continue to work during this transition period but will suffer a gas penalty. It's highly encouraged to migrate allowances over to the Exchange Proxy as soon as possible to avoid interruption.
Presently, while we are in beta, allowances should be set on the `Allowance Target <./addresses.html#exchange-v4>`_.
The motivation for eliminating the separate Allowance Target in the official release is
to reduce transaction costs. Depending on the operational overhead for our integrators,
we may support allowances on both the Exchange V4 & the Allowance Target after the official release, which is slated for January, 2021.