SafeMath fixes

[christianbaroni]

What changed (plus any additional context for devs)

• Fixes handling of scientific notation in the SafeMath functions
• Fixes rounding of negative numbers (up = away from zero)
• Adds new test cases that failed previously, primarily due to the two issues above
• Fixes the divWithExp result which was previously incorrect
• Fixes the chart price formatting bug where numbers would be chopped at e.g., 0.000, as a result of these bugs

With the updated tests, but without the SafeMath fixes:

With the SafeMath fixes:

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(Have since fixed the grouping of tests in the logs — the test results are unchanged.)

Screen recordings / screenshots

What to test

[brunobar79]

Launch in simulator or device for 36da34f

[brunobar79]

Launch in simulator or device for ada00df

[sentry-io]

Suspect Issues

This pull request was deployed and Sentry observed the following issues:

• ‼️ React ErrorBoundary RangeError: Exponent must be positive toFixedWorklet(src/safe-math/SafeMath) View Issue

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