Rename the coins folder to networks (#583)

* Rename the coins folder to networks

Ethereum isn't a coin. It's a network.

Resolves #357.

* More renames of coins -> networks in orchestration

* Correct paths in tests/

* cargo fmt

networks/monero/ringct/bulletproofs/build.rs

@@ -0,0 +1,88 @@
+use std::{
+  io::Write,
+  env,
+  path::Path,
+  fs::{File, remove_file},
+};
+
+#[cfg(feature = "compile-time-generators")]
+fn generators(prefix: &'static str, path: &str) {
+  use curve25519_dalek::EdwardsPoint;
+
+  use monero_generators::bulletproofs_generators;
+
+  fn serialize(generators_string: &mut String, points: &[EdwardsPoint]) {
+    for generator in points {
+      generators_string.extend(
+        format!(
+          "
+          curve25519_dalek::edwards::CompressedEdwardsY({:?}).decompress().unwrap(),
+        ",
+          generator.compress().to_bytes()
+        )
+        .chars(),
+      );
+    }
+  }
+
+  let generators = bulletproofs_generators(prefix.as_bytes());
+  #[allow(non_snake_case)]
+  let mut G_str = String::new();
+  serialize(&mut G_str, &generators.G);
+  #[allow(non_snake_case)]
+  let mut H_str = String::new();
+  serialize(&mut H_str, &generators.H);
+
+  let path = Path::new(&env::var("OUT_DIR").unwrap()).join(path);
+  let _ = remove_file(&path);
+  File::create(&path)
+    .unwrap()
+    .write_all(
+      format!(
+        "
+          static GENERATORS_CELL: OnceLock<Generators> = OnceLock::new();
+          pub(crate) fn GENERATORS() -> &'static Generators {{
+            GENERATORS_CELL.get_or_init(|| Generators {{
+              G: std_shims::vec![
+                {G_str}
+              ],
+              H: std_shims::vec![
+                {H_str}
+              ],
+            }})
+          }}
+        ",
+      )
+      .as_bytes(),
+    )
+    .unwrap();
+}
+
+#[cfg(not(feature = "compile-time-generators"))]
+fn generators(prefix: &'static str, path: &str) {
+  let path = Path::new(&env::var("OUT_DIR").unwrap()).join(path);
+  let _ = remove_file(&path);
+  File::create(&path)
+    .unwrap()
+    .write_all(
+      format!(
+        r#"
+        static GENERATORS_CELL: OnceLock<Generators> = OnceLock::new();
+        pub(crate) fn GENERATORS() -> &'static Generators {{
+          GENERATORS_CELL.get_or_init(|| {{
+            monero_generators::bulletproofs_generators(b"{prefix}")
+          }})
+        }}
+      "#,
+      )
+      .as_bytes(),
+    )
+    .unwrap();
+}
+
+fn main() {
+  println!("cargo:rerun-if-changed=build.rs");
+
+  generators("bulletproof", "generators.rs");
+  generators("bulletproof_plus", "generators_plus.rs");
+}