Publish an alpha version of the Monero crate (#123)

* Label the version as an alpha

* Add versions to Cargo.tomls

* Update to Zeroize 1.5

* Drop patch versions from monero-serai Cargo.toml

* Add a repository field

* Move generators to OUT_DIR

IIRC, I didn't do this originally as it constantly re-generated them. 
Unfortunately, since cargo is complaining about .generators, we have to.

* Remove Timelock::fee_weight

Transaction::fee_weight's has a comment, "Assumes Timelock::None since 
this library won't let you create a TX with a timelock". Accordingly, 
this is dead code.

coins/monero/.gitignore

@@ -1 +0,0 @@
-.generators

coins/monero/Cargo.toml

@@ -1,8 +1,9 @@
 [package]
 name = "monero-serai"
-version = "0.1.0"
+version = "0.1.0-alpha"
 description = "A modern Monero transaction library"
 license = "MIT"
+repository = "https://github.com/serai-dex/serai"
 authors = ["Luke Parker <lukeparker5132@gmail.com>"]
 edition = "2021"
 
@@ -19,7 +20,7 @@ rand_chacha = { version = "0.3", optional = true }
 rand = "0.8"
 rand_distr = "0.4"
 
-zeroize = { version = "1.3", features = ["zeroize_derive"] }
+zeroize = { version = "1.5", features = ["zeroize_derive"] }
 subtle = "2.4"
 
 sha3 = "0.10"
@@ -28,14 +29,14 @@ blake2 = { version = "0.10", optional = true }
 curve25519-dalek = { version = "3", features = ["std"] }
 
 group = { version = "0.12" }
-dalek-ff-group = { path = "../../crypto/dalek-ff-group" }
-multiexp = { path = "../../crypto/multiexp", features = ["batch"] }
+dalek-ff-group = { path = "../../crypto/dalek-ff-group", version = "0.1" }
+multiexp = { path = "../../crypto/multiexp", version = "0.2", features = ["batch"] }
 
-transcript = { package = "flexible-transcript", path = "../../crypto/transcript", features = ["recommended"], optional = true }
-frost = { package = "modular-frost", path = "../../crypto/frost", features = ["ed25519"], optional = true }
-dleq = { path = "../../crypto/dleq", features = ["serialize"], optional = true }
+transcript = { package = "flexible-transcript", path = "../../crypto/transcript", version = "0.1", features = ["recommended"], optional = true }
+frost = { package = "modular-frost", path = "../../crypto/frost", version = "0.2", features = ["ed25519"], optional = true }
+dleq = { path = "../../crypto/dleq", version = "0.1", features = ["serialize"], optional = true }
 
-monero-generators = { path = "generators" }
+monero-generators = { path = "generators", version = "0.1" }
 
 hex = "0.4"
 serde = { version = "1.0", features = ["derive"] }
@@ -50,8 +51,8 @@ reqwest = { version = "0.11", features = ["json"] }
 multisig = ["rand_chacha", "blake2", "transcript", "frost", "dleq"]
 
 [build-dependencies]
-dalek-ff-group = { path = "../../crypto/dalek-ff-group" }
-monero-generators = { path = "generators" }
+dalek-ff-group = { path = "../../crypto/dalek-ff-group", version = "0.1" }
+monero-generators = { path = "generators", version = "0.1" }
 
 [dev-dependencies]
 tokio = { version = "1", features = ["full"] }

coins/monero/build.rs

@@ -1,7 +1,8 @@
 use std::{
   io::Write,
+  env,
   path::Path,
-  fs::{File, DirBuilder, remove_file},
+  fs::{File, remove_file},
 };
 
 use dalek_ff_group::EdwardsPoint;
@@ -33,8 +34,7 @@ fn generators(prefix: &'static str, path: &str) {
   let mut H_str = "".to_string();
   serialize(&mut H_str, &generators.H);
 
-  DirBuilder::new().recursive(true).create(".generators").unwrap();
-  let path = Path::new(".generators").join(path);
+  let path = Path::new(&env::var("OUT_DIR").unwrap()).join(path);
   let _ = remove_file(&path);
   File::create(&path)
     .unwrap()
@@ -60,7 +60,6 @@ fn generators(prefix: &'static str, path: &str) {
 }
 
 fn main() {
-  // For some reason, filtering off .generators does not work. This prevents re-building overall
   println!("cargo:rerun-if-changed=build.rs");
 
   generators("bulletproof", "generators.rs");

coins/monero/generators/Cargo.toml

@@ -18,5 +18,5 @@ tiny-keccak = { version = "2", features = ["keccak"] }
 
 curve25519-dalek = { version = "3", features = ["std"] }
 
-group = { version = "0.12" }
-dalek-ff-group = { path = "../../../crypto/dalek-ff-group" }
+group = "0.12"
+dalek-ff-group = { path = "../../../crypto/dalek-ff-group", version = "0.1.4" }

coins/monero/src/ringct/bulletproofs/original.rs

@@ -12,7 +12,7 @@ use multiexp::BatchVerifier;
 
 use crate::{Commitment, ringct::bulletproofs::core::*};
 
-include!("../../../.generators/generators.rs");
+include!(concat!(env!("OUT_DIR"), "/generators.rs"));
 
 lazy_static! {
   static ref ONE_N: ScalarVector = ScalarVector(vec![Scalar::one(); N]);

coins/monero/src/ringct/bulletproofs/plus.rs

@@ -15,7 +15,7 @@ use crate::{
   ringct::{hash_to_point::raw_hash_to_point, bulletproofs::core::*},
 };
 
-include!("../../../.generators/generators_plus.rs");
+include!(concat!(env!("OUT_DIR"), "/generators_plus.rs"));
 
 lazy_static! {
   static ref TRANSCRIPT: [u8; 32] =

coins/monero/src/transaction.rs

@@ -119,10 +119,6 @@ impl Timelock {
     }
   }
 
-  pub(crate) fn fee_weight() -> usize {
-    8
-  }
-
   fn serialize<W: std::io::Write>(&self, w: &mut W) -> std::io::Result<()> {
     write_varint(
       &match self {

coins/monero/src/wallet/mod.rs

@@ -167,6 +167,7 @@ impl Scanner {
   /// When a new scanner is created, ALL saved output keys must be passed in to be secure.
   /// If None is passed, a modified shared key derivation is used which is immune to the burning
   /// bug (specifically the Guaranteed feature from Featured Addresses).
+  // TODO: Should this take in a DB access handle to ensure output keys are saved?
   pub fn from_view(
     pair: ViewPair,
     network: Network,

coins/monero/src/wallet/scan.rs

@@ -196,8 +196,7 @@ impl SpendableOutput {
 pub struct Timelocked<O: Clone + Zeroize>(Timelock, Vec<O>);
 impl<O: Clone + Zeroize> Drop for Timelocked<O> {
   fn drop(&mut self) {
-    self.0.zeroize();
-    self.1.zeroize();
+    self.zeroize();
   }
 }
 impl<O: Clone + Zeroize> ZeroizeOnDrop for Timelocked<O> {}