[stableswap] cfmm solver calculates incorrect value

[pysel]

While working on 2346 faced invalid output: greater than full pool reserves. I used pool with two assets both of 100_000 amount. An error occurred here:

out, err := test_pool.CalcOutAmtGivenIn(ctx, tc.tokenIn, tc.tokenOut, swapFee)

Amount of tokenIn here is 1000. However, an error which I mentioned at first occurred in cfmm solver. When debugging, these are variables from the solver:

a(result of solver) 68232581257346302.337765795431794666538236795097975586
xReserve(tokenIn amount) 10000000.000000000000000000000000000000000000

I made sure that all the parameters passed correctly into the cfmm solver function. My guess, there is something wrong with the function itself.

[AlpinYukseloglu]

This issue (and several others) is fixed by our new solvers in #2697 and #2816! Those changes still need to be merged in and wired up to our pool functions (e.g. CalcOutAmtGivenIn), but after we do that the issue you mentioned should be solved

Unfortunately #2346 is currently blocked on those two PRs (and their multi-asset versions), so if you'd like to pick up something that isn't blocked, anything that's tagged "Good First Issue" should be available to be worked on directly