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#599 Fixed-Point-Math | Constant Product Invariants via U256 High-Precision Engine - #3
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…igh-precision engine Core AMM swap math maintaining x*y=k without precision loss: - U256 struct for 256-bit intermediate products of two u128 values - mul_div with full precision, always rounding down (favors pool reserves) - compute_swap_out, compute_lp_shares, compute_remove_liquidity - assert_invariant_stable checks k is non-decreasing - Unit tests covering basic ops, max bounds, high volume scenarios
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Oct 18, 2026
…or-warning-monitor feat: add dynamic vault health warning monitor
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Description
Core AMM swap module maintaining constant product (x * y = k) invariants without precision loss or rounding vulnerabilities.
Changes
src/amm/invariant.rswithU256struct (two u128 words) for 256-bit intermediate productscompute_swap_out:out = reserve_out * amount_in / (reserve_in + amount_in)with floor roundingcompute_lp_shares:min(a * total / reserve_a, b * total / reserve_b)with floor roundingcompute_remove_liquidity: proportional withdrawals with floor roundingassert_invariant_stable: verifies k is non-decreasing after swapsCloses StellarFlow-Network#599