Define all coordinator transaction types

coordinator/tributary/Cargo.toml

@@ -10,9 +10,17 @@ edition = "2021"
 [dependencies]
 thiserror = "1"
 
+rand_core = { version = "0.6", optional = true }
+
 blake2 = "0.10"
 
 ciphersuite = { package = "ciphersuite", path = "../../crypto/ciphersuite", features = ["ristretto"] }
 schnorr = { package = "schnorr-signatures", path = "../../crypto/schnorr" }
 
 tendermint = { package = "tendermint-machine", path = "./tendermint" }
+
+[dev-dependencies]
+rand_core = "0.6"
+
+[features]
+tests = ["rand_core"]

coordinator/tributary/src/lib.rs

@@ -9,6 +9,9 @@ pub use transaction::*;
 mod block;
 pub use block::*;
 
+#[cfg(any(test, feature = "tests"))]
+pub mod tests;
+
 /// An item which can be read and written.
 pub trait ReadWrite: Sized {
   fn read<R: io::Read>(reader: &mut R) -> io::Result<Self>;

coordinator/tributary/src/tests/mod.rs

@@ -0,0 +1,2 @@
+mod transaction;
+pub use transaction::*;

coordinator/tributary/src/tests/transaction.rs

@@ -0,0 +1,27 @@
+use rand_core::RngCore;
+
+use ciphersuite::{
+  group::{ff::Field, Group},
+  Ciphersuite, Ristretto,
+};
+use schnorr::SchnorrSignature;
+
+use crate::Signed;
+
+pub fn random_signed<R: RngCore>(rng: &mut R) -> Signed {
+  Signed {
+    signer: <Ristretto as Ciphersuite>::G::random(&mut *rng),
+    nonce: u32::try_from(rng.next_u64() >> 32).unwrap(),
+    signature: SchnorrSignature::<Ristretto> {
+      R: <Ristretto as Ciphersuite>::G::random(&mut *rng),
+      s: <Ristretto as Ciphersuite>::F::random(rng),
+    },
+  }
+}
+
+#[test]
+fn serialize_signed() {
+  use crate::ReadWrite;
+  let signed = signed(&mut rand_core::OsRng);
+  assert_eq!(Signed::read::<&[u8]>(&mut signed.serialize().as_ref()).unwrap(), signed);
+}