Summary

Chainlink Decimals and Token Decimals over here are not taken care of in a right manner.
Due to different chainlink decimals for different conversions, results in invalid calculation of the variable costInEuros

Vulnerability Details

Due to not considering the chainlink decimals when conversion of tokens can result in inaccurate results and loss of tokens.
If the chainlink decimals for assetPriceUsd and priceEurUsd are different the result will be inaccurate and results in wrong calculation of costInEuros.

Impact

Token amount is calculated inaccurately.

Tools Used

Manual

Recommendations

Use chainlink decimals correctly