Cowswap Trades not working on TallyHo!

[MBMaria]

Overview

When trying to complete a TallyHo! trade, the transaction fails when using Cowswap. When turning flag off, initial trade looks like its trying to use Cowswap but after selecting Preview Trade it shows correct figures and trade completes on 0x as expected.

References and additional details

1. Log into app.shapeshift.com and connect to TallyHo!
2. Populate trade, select preview trade and then confirm and trade
3. Notice the trade fails with a Something went wrong error
4. Turn Cowswap flag off and replicate trade
5. Notice when initially populating trade, the fees look off
6. Preview trade and notice the fees look accurate
7. Confirm and Trade and note the trade executes as expected

Acceptance Criteria

Trades should work without having to turn flags off

Need By Date

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Screenshots/Mockups

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Ownership

• [X] If my bounty needs engineering or needs product I have added the respective labels on the right
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Estimated effort

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Sponsor / Stakeholder

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