add build script of wasm

Cargo.lock

@@ -375,6 +375,7 @@ dependencies = [
  "serde_json",
  "shamir_secret_sharing",
  "tiny-keccak",
+ "wasm-bindgen",
 ]
 
 [[package]]

Cargo.toml

@@ -24,4 +24,6 @@ shamir_secret_sharing = "0.1.1"
 tiny-keccak = "1.5"
 primitive-types = "0.12.1"
 getrandom = { version = "0.2.7", features = ["js"]}
+[target.'cfg(target_arch = "wasm32")'.dependencies]
+wasm-bindgen = "0.2.83"
 

scripts/wasm_build.sh

@@ -0,0 +1 @@
+AR=/opt/homebrew/opt/llvm/bin/llvm-ar CC=/opt/homebrew/opt/llvm/bin/clang wasm-pack build --target web

src/lib.rs

@@ -7,6 +7,7 @@
 
 use std::ffi::{CStr, CString};
 use std::os::raw::c_char;
+use wasm_bindgen::prelude::*;
 
 mod wallet;
 use wallet_impl::Wallet;
@@ -112,6 +113,7 @@ pub unsafe extern "C" fn free_cwallet(cw: CWallet) {
 }
 
 #[no_mangle]
+#[wasm_bindgen]
 pub unsafe extern "C" fn get_address(
     msg_key: *const c_char,
     master_key: *const c_char,