Hush lite wallet
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107 lines
3.1 KiB
107 lines
3.1 KiB
#[macro_use]
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extern crate lazy_static;
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use libc::{c_char};
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use std::ffi::{CStr, CString};
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use std::sync::{Mutex};
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use std::cell::RefCell;
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use silentdragonlitelib::{commands, lightclient::{LightClient, LightClientConfig}};
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// We'll use a MUTEX to store a global lightclient instance,
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// so we don't have to keep creating it. We need to store it here, in rust
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// because we can't return such a complex structure back to C++
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lazy_static! {
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static ref LIGHTCLIENT: Mutex<RefCell<Option<LightClient>>> = Mutex::new(RefCell::new(None));
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}
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// Check if there is an existing wallet
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#[no_mangle]
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pub extern fn litelib_wallet_exists(chain_name: *const c_char) -> bool {
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let chain_name_str = unsafe {
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assert!(!chain_name.is_null());
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CStr::from_ptr(chain_name).to_string_lossy().into_owned()
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};
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let config = LightClientConfig::create_unconnected(chain_name_str);
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config.wallet_exists()
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}
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// Initialize a new lightclient and store its value
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#[no_mangle]
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pub extern fn litelib_initialze_existing(dangerous: bool, server: *const c_char) -> *mut c_char {
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let server_str = unsafe {
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assert!(!server.is_null());
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CStr::from_ptr(server).to_string_lossy().into_owned()
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};
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let server = LightClientConfig::get_server_or_default(Some(server_str));
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let (config, latest_block_height) = match LightClientConfig::create(server, dangerous) {
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Ok((c, h)) => (c, h),
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Err(e) => {
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let e_str = CString::new(format!("Error: {}", e)).unwrap();
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return e_str.into_raw();
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}
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};
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let lightclient = match LightClient::read_from_disk(&config) {
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Ok(l) => l,
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Err(e) => {
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let e_str = CString::new(format!("Error: {}", e)).unwrap();
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return e_str.into_raw();
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}
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};
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LIGHTCLIENT.lock().unwrap().replace(Some(lightclient));
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let c_str = CString::new("OK").unwrap();
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return c_str.into_raw();
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}
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#[no_mangle]
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pub extern fn litelib_execute(cmd: *const c_char, args: *const c_char) -> *mut c_char {
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let cmd_str = unsafe {
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assert!(!cmd.is_null());
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CStr::from_ptr(cmd).to_string_lossy().into_owned()
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};
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let arg_str = unsafe {
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assert!(!args.is_null());
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CStr::from_ptr(args).to_string_lossy().into_owned()
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};
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let resp: String;
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{
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let lc = LIGHTCLIENT.lock().unwrap();
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if lc.borrow().is_none() {
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let e_str = CString::new("Error: Light Client is not initialized").unwrap();
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return e_str.into_raw();
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}
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let args = if arg_str.is_empty() { vec![] } else { vec![arg_str.as_ref()] };
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resp = commands::do_user_command(&cmd_str, &args, lc.borrow().as_ref().unwrap()).clone();
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};
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let c_str = CString::new(resp.as_bytes()).unwrap();
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return c_str.into_raw();
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}
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/**
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* Callers that receive string return values from other functions should call this to return the string
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* back to rust, so it can be freed. Failure to call this function will result in a memory leak
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*/
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#[no_mangle]
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pub extern fn litelib_rust_free_string(s: *mut c_char) {
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unsafe {
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if s.is_null() { return }
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CString::from_raw(s)
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};
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}
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