The function of the Bancor Vortex remains unchanged in Bancor 3, however its specific behavior is modified to be more efficient. Rather than collecting a wide variety of token types, the Vortex on Bancor 3 will collect BNT exclusively; fees earned in TKN are swapped immediately for BNT. Therefore, triggering the Vortex results in a single swap of BNT for vBNT directly, rather than a myriad of swaps across numerous TKN pools for BNT as a first step. This simplified arrangement has consequences both for the effective value burned, and an improved gas efficiency overall.
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