feat: dex math native port

.gitignore

@@ -14,3 +14,10 @@ local-scripts
 tests/debug-price-route.json
 .husky/.git-secrets-installed
 .claude/worktrees/
+
+# Rust / NAPI-RS native addon
+native/target/
+native/node_modules/
+native/*.node
+native/index.js
+native/index.d.ts

.npmignore

@@ -1,5 +1,12 @@
 **/*
 !/build/**
+!/native/**
+# Exclude native build artifacts (rebuilt from source on install)
+native/target/**
+native/node_modules/**
+native/*.node
+native/index.js
+native/index.d.ts
 !LICENSE
 !package.json
 !README.md

native/Cargo.toml

@@ -0,0 +1,22 @@
+[package]
+name = "v3-math-native"
+version = "0.1.0"
+edition = "2021"
+
+[lib]
+crate-type = ["cdylib"]
+
+[dependencies]
+napi = { version = "2", features = ["napi6", "serde-json"] }
+napi-derive = "2"
+ethnum = "1"
+rayon = "1"
+serde = { version = "1", features = ["derive"] }
+serde_json = "1"
+
+[build-dependencies]
+napi-build = "2"
+
+[profile.release]
+lto = true
+strip = "symbols"

native/build.rs

@@ -0,0 +1,5 @@
+extern crate napi_build;
+
+fn main() {
+    napi_build::setup();
+}