Add Lesson 6 rounding issue

chronological-issues-from-video.md

@@ -94,6 +94,14 @@ Whenever the terms Network ID and Chain ID are used without distinction, it shou
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+## Lesson 6
+- [5:44:00](https://youtu.be/M576WGiDBdQ?t=20640)
+  - In the video, the getEntranceFee() function returns `(minimumUSD * precision) / price`
+  - Integer divisions are rounded towards 0 in Solidity, so this function will almost always return an amount worth slightly less than our minimum price. It makes it unusable with the fund() function because the transaction will revert everytime.
+  - To fix it we can round up the result
+  - getEntranceFee() function should return `((minimumUSD * precision) / price) + 1`
+  - This fix has been [merged](https://github.com/PatrickAlphaC/brownie_fund_me/pull/32/files) and you can read more explanation about the issue [here](https://github.com/PatrickAlphaC/brownie_fund_me/issues/10#issuecomment-1041602057)
+
 ## Lesson 7
 - [8:06:54ish](https://youtu.be/M576WGiDBdQ?t=29214)
   - In the video, we use events exclusivly to test our contracts, however, we could have also used `tx.return_value` to get the return value of a function.