chore(wasm): spelling fixes

Signed-off-by: Xe Iaso <me@xeiaso.net>

wasm/anubis/src/lib.rs

@@ -38,9 +38,21 @@ mod hostimport {
 
 #[cfg(not(target_arch = "wasm32"))]
 mod hostimport {
+    use crate::{DATA_BUFFER, DATA_LENGTH};
+
     pub fn update_nonce(_nonce: u32) {
         // This is intentionally blank
     }
+
+    pub fn data_ptr() -> *const u8 {
+        let challenge = &DATA_BUFFER;
+        challenge.as_ptr()
+    }
+
+    pub fn set_data_length(len: u32) {
+        let mut data_length = DATA_LENGTH.lock().unwrap();
+        *data_length = len as usize;
+    }
 }
 
 /// The data buffer is a bit weird in that it doesn't have an explicit length as it can
@@ -57,4 +69,4 @@ mod hostimport {
 pub static DATA_BUFFER: LazyLock<[u8; 4096]> = LazyLock::new(|| [0; 4096]);
 pub static DATA_LENGTH: LazyLock<Mutex<usize>> = LazyLock::new(|| Mutex::new(0));
 
-pub use hostimport::update_nonce;
+pub use hostimport::{data_ptr, set_data_length, update_nonce};

wasm/pow/hashx/src/lib.rs

@@ -55,10 +55,12 @@ fn anubis_work_inner(
     let data = &DATA_BUFFER;
     let data_len = *DATA_LENGTH.lock().unwrap();
     let data_slice = &data[..data_len];
+    let mut i = 0;
 
     let h = HashX::new(data_slice)?;
 
     loop {
+        i += 1;
         let hash = h.hash_to_bytes(nonce as u64);
 
         if validate(&hash, difficulty) {
@@ -69,24 +71,18 @@ fn anubis_work_inner(
             return Ok(nonce);
         }
 
-        let old_nonce = nonce;
         nonce = nonce.wrapping_add(iterand);
 
-        // send a progress update every 1024 iterations. since each thread checks
-        // separate values, one simple way to do this is by bit masking the
-        // nonce for multiples of 1024. unfortunately, if the number of threads
-        // is not prime, only some of the threads will be sending the status
-        // update and they will get behind the others. this is slightly more
-        // complicated but ensures an even distribution between threads.
-        if nonce > old_nonce | 1023 && (nonce >> 10) % iterand == initial_nonce {
+        if i == 1024 {
             update_nonce(nonce);
+            i = 0;
         }
     }
 }
 
 /// This function is the main entrypoint for the Anubis proof of work implementation.
 ///
-/// This expects `DATA_BUFFER` to be pre-populated with the challenge value as "raw bytes".
+/// This expects `DATA_BUFFER` to be prepopulated with the challenge value as "raw bytes".
 /// The definition of what goes in the data buffer is an exercise for the implementor, but
 /// for SHA-256 we store the hash as "raw bytes". The data buffer is intentionally oversized
 /// so that the challenge value can be expanded in the future.

wasm/pow/sha256/src/lib.rs

@@ -62,7 +62,6 @@ fn compute_hash(nonce: u32) -> [u8; 32] {
     let data = &DATA_BUFFER;
     let data_len = *DATA_LENGTH.lock().unwrap();
     let use_le = data[data_len - 1] >= 128;
-
     let data_slice = &data[..data_len];
 
     let mut hasher = Sha256::new();
@@ -77,7 +76,7 @@ fn compute_hash(nonce: u32) -> [u8; 32] {
 
 /// This function is the main entrypoint for the Anubis proof of work implementation.
 ///
-/// This expects `DATA_BUFFER` to be pre-populated with the challenge value as "raw bytes".
+/// This expects `DATA_BUFFER` to be prepopulated with the challenge value as "raw bytes".
 /// The definition of what goes in the data buffer is an exercise for the implementor, but
 /// for SHA-256 we store the hash as "raw bytes". The data buffer is intentionally oversized
 /// so that the challenge value can be expanded in the future.
@@ -96,8 +95,10 @@ fn compute_hash(nonce: u32) -> [u8; 32] {
 #[unsafe(no_mangle)]
 pub extern "C" fn anubis_work(difficulty: u32, initial_nonce: u32, iterand: u32) -> u32 {
     let mut nonce = initial_nonce;
+    let mut i = 0;
 
     loop {
+        i += 1;
         let hash = compute_hash(nonce);
 
         if validate(&hash, difficulty) {
@@ -108,17 +109,11 @@ pub extern "C" fn anubis_work(difficulty: u32, initial_nonce: u32, iterand: u32)
             return nonce;
         }
 
-        let old_nonce = nonce;
         nonce = nonce.wrapping_add(iterand);
 
-        // send a progress update every 1024 iterations. since each thread checks
-        // separate values, one simple way to do this is by bit masking the
-        // nonce for multiples of 1024. unfortunately, if the number of threads
-        // is not prime, only some of the threads will be sending the status
-        // update and they will get behind the others. this is slightly more
-        // complicated but ensures an even distribution between threads.
-        if nonce > old_nonce | 1023 && (nonce >> 10) % iterand == initial_nonce {
+        if i == 1024 {
             update_nonce(nonce);
+            i = 0;
         }
     }
 }