"You did awesome, but don't let it go to your head."
"Research shows" (I read long ago) that the happiest men are those take their wives' advice — that's certainly been true for my own N=1, for coming up on four decades now. I'd imagine we could replace "wives" with "spouses" and get comparable results.
Haven’t you just risked an infinite loop in your code?
But.. I met someone at the gym who's been struggling with an esoteric problem on an ancient piece of software for over a decade, and they approached me to ask if I could solve it. I said "maybe", sat on it for a few days, and then replicated the issue on my machine and solved their problem in about an hour. I asked for $50 and they gave me double, which was wildly more rewarding than being paid $100k to write react all year, not that that salary is on the table any longer.
Is the job market so bad right now? I‘m in a privileged position (and not in the US), so have no clue of the state of things.
But in business, you need to charge an honest / fair amount. (sure, sometimes that 1 hour bug fix had $100K of 'value', but we could argue about honest / fair).
You mention being an employee at $100K a year. Double that, gives you a contractor rate of $100 an hour. That is the floor of what you should be asking floor; as in the absolute lowest. Another $50 or $100 an hour is still fair and honest in todays economy.