feature-gate blst

crates/precompile/Cargo.toml

@@ -42,14 +42,14 @@ secp256k1 = { version = "0.29.0", default-features = false, features = [
 ], optional = true }
 
 # BLS12-381 precompiles
-blst = "0.3.11"
+blst = { version = "0.3.11", optional = true }
 
 [dev-dependencies]
 criterion = { version = "0.5" }
 rand = { version = "0.8", features = ["std"] }
 
 [features]
-default = ["std", "c-kzg", "secp256k1", "portable"]
+default = ["std", "c-kzg", "secp256k1", "portable", "blst"]
 std = [
     "revm-primitives/std",
     "k256/std",
@@ -83,6 +83,9 @@ portable = ["revm-primitives/portable", "c-kzg?/portable"]
 # In Linux it passes. If you don't require to build wasm on win/mac, it is safe to use it and it is enabled by default.
 secp256k1 = ["dep:secp256k1"]
 
+# Enables the BLS12-381 precompiles.
+blst = ["dep:blst"]
+
 [[bench]]
 name = "bench"
 path = "benches/bench.rs"

crates/precompile/src/lib.rs

@@ -9,6 +9,7 @@
 extern crate alloc as std;
 
 pub mod blake2;
+#[cfg(feature = "blst")]
 pub mod bls12_381;
 pub mod bn128;
 pub mod hash;
@@ -160,9 +161,16 @@ impl Precompiles {
     pub fn prague() -> &'static Self {
         static INSTANCE: OnceBox<Precompiles> = OnceBox::new();
         INSTANCE.get_or_init(|| {
-            let mut precompiles = Self::cancun().clone();
-            // EIP-2537: Precompile for BLS12-381 curve operations
-            precompiles.extend(bls12_381::precompiles());
+            let precompiles = Self::berlin().clone();
+
+            // Don't include KZG point evaluation precompile in no_std builds.
+            #[cfg(feature = "blst")]
+            let precompiles = {
+                let mut precompiles = precompiles;
+                precompiles.extend(bls12_381::precompiles());
+                precompiles
+            };
+
             Box::new(precompiles)
         })
     }