Implement hash_to_point in Rust

Closes https://github.com/serai-dex/serai/issues/32.

coins/monero/src/tests/clsag.rs

@@ -12,9 +12,9 @@ use frost::curve::Ed25519;
 
 use crate::{
   Commitment,
-  random_scalar, generate_key_image,
+  random_scalar,
   wallet::Decoys,
-  ringct::clsag::{ClsagInput, Clsag}
+  ringct::{generate_key_image, clsag::{ClsagInput, Clsag}}
 };
 #[cfg(feature = "multisig")]
 use crate::{frost::MultisigError, ringct::clsag::{ClsagDetails, ClsagMultisig}};
@@ -48,7 +48,7 @@ fn clsag() {
       ring.push([&dest * &ED25519_BASEPOINT_TABLE, Commitment::new(mask, amount).calculate()]);
     }
 
-    let image = generate_key_image(&secrets[0]);
+    let image = generate_key_image(secrets[0]);
     let (clsag, pseudo_out) = Clsag::sign(
       &mut OsRng,
       &vec![(

coins/monero/src/tests/hash_to_point.rs

@@ -0,0 +1,13 @@
+use rand::rngs::OsRng;
+
+use curve25519_dalek::constants::ED25519_BASEPOINT_TABLE;
+
+use crate::{random_scalar, ringct::hash_to_point::{hash_to_point, rust_hash_to_point}};
+
+#[test]
+fn test_hash_to_point() {
+  for _ in 0 .. 200 {
+    let point = &random_scalar(&mut OsRng) * &ED25519_BASEPOINT_TABLE;
+    assert_eq!(rust_hash_to_point(point), hash_to_point(point));
+  }
+}

coins/monero/src/tests/mod.rs

@@ -1,2 +1,3 @@
+mod hash_to_point;
 mod clsag;
 mod address;