Replace rand with rand_core where possible

Turns out rand_core offers OsRng.

coins/ethereum/Cargo.toml

@@ -7,22 +7,25 @@ authors = ["Luke Parker <lukeparker5132@gmail.com>", "Elizabeth Binks <elizabeth
 edition = "2021"
 
 [dependencies]
+hex-literal = "0.3"
 thiserror = "1"
+rand_core = "0.6"
+
 serde_json = "1.0"
 serde = "1.0"
-hex-literal = "0.3"
 
-ethers = { version = "0.14", features = ["abigen", "ethers-solc"] }
-eyre = "0.6"
+sha3 = "0.10"
 
+group = "0.12"
 k256 = { version = "0.11", features = ["arithmetic", "keccak256", "ecdsa"] }
 frost = { package = "modular-frost", path = "../../crypto/frost", features = ["secp256k1"] }
-sha3 = "0.10"
-group = "0.12"
+
+eyre = "0.6"
+
+ethers = { version = "0.14", features = ["abigen", "ethers-solc"] }
 
 [dev-dependencies]
-rand = "0.8"
-tokio = { version = "1.19", features = ["macros"] }
+tokio = { version = "1", features = ["macros"] }
 
 [build-dependencies]
 ethers-solc = "0.14"

coins/ethereum/tests/contract.rs

@@ -24,7 +24,7 @@ async fn test_ecrecover_hack() {
   };
   use k256::elliptic_curve::bigint::ArrayEncoding;
   use k256::{Scalar, U256};
-  use rand::rngs::OsRng;
+  use rand_core::OsRng;
 
   let anvil = Anvil::new().spawn();
   let wallet: LocalWallet = anvil.keys()[0].clone().into();

coins/ethereum/tests/crypto.rs

@@ -12,7 +12,7 @@ fn test_ecrecover() {
     signature::{Signer, Verifier},
     SigningKey, VerifyingKey,
   };
-  use rand::rngs::OsRng;
+  use rand_core::OsRng;
 
   let private = SigningKey::random(&mut OsRng);
   let public = VerifyingKey::from(&private);
@@ -33,7 +33,7 @@ fn test_signing() {
     algorithm::Schnorr,
     tests::{algorithm_machines, key_gen, sign},
   };
-  use rand::rngs::OsRng;
+  use rand_core::OsRng;
 
   let keys = key_gen::<_, Secp256k1>(&mut OsRng);
   let _group_key = keys[&1].group_key();
@@ -53,7 +53,7 @@ fn test_ecrecover_hack() {
     algorithm::Schnorr,
     tests::{algorithm_machines, key_gen, sign},
   };
-  use rand::rngs::OsRng;
+  use rand_core::OsRng;
 
   let keys = key_gen::<_, Secp256k1>(&mut OsRng);
   let group_key = keys[&1].group_key();

coins/monero/src/tests/clsag.rs

@@ -1,7 +1,7 @@
 #[cfg(feature = "multisig")]
 use std::sync::{Arc, RwLock};
 
-use rand::{RngCore, rngs::OsRng};
+use rand_core::{RngCore, OsRng};
 
 use curve25519_dalek::{constants::ED25519_BASEPOINT_TABLE, scalar::Scalar};
 

coins/monero/tests/rpc.rs

@@ -1,4 +1,4 @@
-use rand::rngs::OsRng;
+use rand_core::OsRng;
 
 use curve25519_dalek::constants::ED25519_BASEPOINT_TABLE;
 

coins/monero/tests/send.rs

@@ -4,7 +4,7 @@ use std::collections::HashMap;
 
 use lazy_static::lazy_static;
 
-use rand::rngs::OsRng;
+use rand_core::OsRng;
 
 #[cfg(feature = "multisig")]
 use blake2::{digest::Update, Digest, Blake2b512};