No support non-18 decimals token

[code423n4]

Lines of code

https://github.com/code-423n4/2023-01-numoen/blob/2ad9a73d793ea23a25a381faadc86ae0c8cb5913/src/core/JumpRate.sol#L19 https://github.com/code-423n4/2023-01-numoen/blob/2ad9a73d793ea23a25a381faadc86ae0c8cb5913/src/core/JumpRate.sol#L21 https://github.com/code-423n4/2023-01-numoen/blob/2ad9a73d793ea23a25a381faadc86ae0c8cb5913/src/core/JumpRate.sol#L37 https://github.com/code-423n4/2023-01-numoen/blob/2ad9a73d793ea23a25a381faadc86ae0c8cb5913/src/core/JumpRate.sol#L42

Vulnerability details

Impact

The function is dependent on the token being of 18 decimals for correct calculation. If the project wants to use other tokens then it underlying native token. It would have to relaunch to accommodate this, or it can be forgotten and lead to future wrong calculations.

Tools Used

VS code

Recommended Mitigation Steps

A better choice is a decimal check or use #safeDecimal of BoringSolidity

https://github.com/boringcrypto/BoringSolidity/blob/ccb743d4c3363ca37491b87c6c9b24b1f5fa25dc/contracts/libraries/BoringERC20.sol#L52

[c4-judge]

berndartmueller marked the issue as unsatisfactory: Invalid