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feat: Add support for buy token affiliate fees #310
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moodlezoup
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dekz
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dorothy-zbornak
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Aug 7, 2020
| @@ -479,10 +492,13 @@ export class SwapService { | |||
| assetSwapperOpts, | |||
| ); | |||
| } else if (buyAmount !== undefined) { | |||
| const buyAmountScaled = buyAmount | |||
| .times(affiliateFee.buyTokenPercentageFee + 1) | |||
| .integerValue(BigNumber.ROUND_DOWN); | |||
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I feel like this should be ROUND_UP.
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I believe the rounding mode needs to be the same between this and getAffiliateFeeAmounts
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Isn't it possible we'll be under by 1 wei after the affiliate fee is taken out by the transformer?
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I tried to work out the math but gave up
for (let i = 0; i < 100000; i++) {
it(`Test ${i}`, () => {
const buyAmount = getRandomInteger(0, constants.ONE_ETHER);
const buyTokenPercentageFee = getRandomFloat(0, 1);
const buyAmountScaled = buyAmount.times(buyTokenPercentageFee.plus(1)).integerValue(BigNumber.ROUND_DOWN);
const buyTokenFeeAmount = buyAmountScaled
.times(buyTokenPercentageFee)
.dividedBy(buyTokenPercentageFee.plus(1))
.integerValue(BigNumber.ROUND_DOWN);
expect(buyAmountScaled.minus(buyTokenFeeAmount)).to.bignumber.equal(buyAmount);
});
}
100000 passing (26s)
Comment on lines
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| const buyTokenFeeAmount = quote.worstCaseQuoteInfo.makerAssetAmount | ||
| .times(fee.buyTokenPercentageFee) | ||
| .dividedBy(fee.buyTokenPercentageFee + 1) | ||
| .integerValue(BigNumber.ROUND_DOWN); |
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I like that the the fee is only off the guaranteed price.
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# [1.14.0](v1.13.0...v1.14.0) (2020-08-10) ### Bug Fixes * handle addresses in depth ([#313](#313)) ([ce6978b](ce6978b)) * return input in depth-chart ([#307](#307)) ([a3fa961](a3fa961)) * source regression ([#306](#306)) ([cdcfc78](cdcfc78)) * update asset-swapper optimizer for splits ([#311](#311)) ([5b212c9](5b212c9)) ### Features * Add support for buy token affiliate fees ([#310](#310)) ([2866253](2866253)) * ethToInputRate cost routing ([#315](#315)) ([e542c98](e542c98))
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🎉 This PR is included in version 1.14.0 🎉 The release is available on:
Your semantic-release bot 📦🚀 |
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Description
Testing Instructions
Checklist
[WIP]if necessary.