Aditya Kulkarni
5 years ago
5 changed files with 2588 additions and 0 deletions
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/target/ |
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[package] |
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name = "qtlib" |
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version = "0.1.0" |
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authors = ["ZecWallet"] |
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edition = "2018" |
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[lib] |
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name = "zecwalletlite" |
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crate-type = ["staticlib"] |
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[dependencies] |
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libc = "0.2.58" |
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lazy_static = "1.4.0" |
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zecwalletlitelib = { git = "https://github.com/adityapk00/zecwallet-lite-lib" } |
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#[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 zecwalletlitelib::{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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// Initialize a new lightclient and store its value
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#[no_mangle] |
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pub extern fn initialze(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::new(None, &config, latest_block_height) { |
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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 execute(cmd: *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 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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resp = commands::do_user_command(&cmd_str, &vec![], 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 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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#ifndef _ZEC_PAPER_RUST_H |
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#define _ZEC_PAPER_RUST_H |
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#ifdef __cplusplus |
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extern "C"{ |
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#endif |
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extern char * initialze (bool dangerous, const char* server); |
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extern char * execute (char* s); |
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extern void rust_free_string (char* s); |
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#ifdef __cplusplus |
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} |
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#endif |
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#endif |
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