Migrate BLAKE3 to BLAKE2 for easier cross-compilation

Author: aumetra

Cargo.lock

@@ -10,7 +10,7 @@ license = "Apache-2.0"
 proc-macro = true
 
 [dependencies]
-blake3 = "1.5"
+blake2 = "0.10.6"
 proc-macro2 = "1.0.86"
 quote = "1.0.37"
 syn = { version = "2.0.77", features = ["extra-traits", "full"] }

packages/vm-derive/Cargo.toml

@@ -1,5 +1,6 @@
 use std::hash::{Hash, Hasher};
 
+use blake2::{Blake2b512, Digest};
 use proc_macro2::TokenStream;
 use quote::{quote, ToTokens};
 use syn::{punctuated::Punctuated, Token};
@@ -36,18 +37,18 @@ impl syn::parse::Parse for Options {
 }
 
 struct Blake3Hasher {
-    hasher: blake3::Hasher,
+    hasher: Blake2b512,
 }
 
 impl Blake3Hasher {
     fn new() -> Self {
         Self {
-            hasher: blake3::Hasher::new(),
+            hasher: Blake2b512::new(),
         }
     }
 
-    fn consume(self) -> blake3::Hash {
-        self.hasher.finalize()
+    fn consume(self) -> [u8; 64] {
+        self.hasher.finalize().into()
     }
 }
 
@@ -72,7 +73,7 @@ pub fn hash_function_impl(attr: TokenStream, input: TokenStream) -> TokenStream
     let hash = hasher.consume();
 
     let hash_variable_name = &options.const_name;
-    let hash_bytes = hash.as_bytes();
+    let hash_bytes = hash.as_slice();
 
     quote! {
         pub const #hash_variable_name: &[u8] = &[#(#hash_bytes),*];

packages/vm-derive/src/hash_function.rs

@@ -44,7 +44,7 @@ bytes = "1.4.0"     # need a higher version than the one required by Wasmer for
 clru = "0.6.1"
 crc32fast = "1.3.2"
 bech32 = "0.11.0"
-blake3 = "1.5"
+blake2 = "0.10.6"
 # Uses the path when built locally; uses the given version from crates.io when published
 cosmwasm-core = { version = "2.2.0-rc.1", path = "../core" }
 cosmwasm-std = { version = "2.2.0-rc.1", path = "../std", default-features = false, features = [

packages/vm/Cargo.toml

@@ -1,3 +1,4 @@
+use blake2::{digest::consts::U5, Blake2b, Digest};
 use std::fs;
 use std::hash::Hash;
 use std::io;
@@ -75,7 +76,7 @@ const MODULE_SERIALIZATION_VERSION: &str = "v20";
 fn raw_module_version_discriminator() -> String {
     let hashes = [COST_FUNCTION_HASH];
 
-    let mut hasher = blake3::Hasher::new();
+    let mut hasher = Blake2b::<U5>::new();
 
     hasher.update(MODULE_SERIALIZATION_VERSION.as_bytes());
     hasher.update(wasmer::VERSION.as_bytes());
@@ -84,7 +85,7 @@ fn raw_module_version_discriminator() -> String {
         hasher.update(hash);
     }
 
-    hasher.finalize().to_hex().to_string()
+    hex::encode(hasher.finalize())
 }
 
 /// This version __MUST__ change whenever the module system changes in a way
@@ -481,7 +482,7 @@ mod tests {
         let version = raw_module_version_discriminator();
         assert_eq!(
             version,
-            "b2a230627e6fd9c14c45aabcf781b58d873dd251fcb004d30e081c8407cad5af"
+            "5b35f8ce52"
         );
     }
 }