feat: add SSZ encoding/decoding support for parsigex (#322)

* feat: add deadline.rs

* feat: deadline tests

* fix: remove comments

* wip: add parasig db and some tests

* refactor: remove old app/deadline

* feat: add rust docs

* feat: add clone box and clone eq

* feat: finish tests

* feat: add parsigex [wip]

* fix: typo

* fix: parsigex

* refactor: parsigex

* fix: linter

* feat: add subscribe

* feat: add SSZ encoding/decoding support for parsigex

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix: update yanked fastrand and ignore pre-existing rand advisory

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix: linter

* fix: remove binary

* chore: remove Go sszfixtures generator from repo

The SSZ test fixtures have already been generated and committed under
crates/core/testdata/ssz/. The Go generator code is no longer needed
in-tree; the binary is already gitignored.

Co-authored-by: Bohdan Ohorodnii <varex83@users.noreply.github.com>

* fix: review comments

* fix: claude review

---------

Co-authored-by: Bohdan Ohorodnii <35969035+varex83@users.noreply.github.com>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
Co-authored-by: claude[bot] <41898282+claude[bot]@users.noreply.github.com>
Co-authored-by: Bohdan Ohorodnii <varex83@users.noreply.github.com>

Author: 4 people

.gitignore

@@ -24,5 +24,8 @@ lcov.info
 coverage.json
 
 .charon*
+.omx
 
 .peerinfo*
+
+test-infra/sszfixtures/sszfixtures

Cargo.lock

@@ -94,6 +94,8 @@ oas3-gen-support = "0.24"
 bon = "3.8"
 testcontainers = "0.27"
 test-case = "3.3"
+ethereum_ssz = { version = "0.10" }
+ethereum_ssz_derive = { version = "0.10" }
 tree_hash = "0.12"
 tree_hash_derive = "0.12"
 tar = "0.4"

Cargo.toml

@@ -8,10 +8,12 @@ publish.workspace = true
 
 [dependencies]
 async-trait.workspace = true
+ethereum_ssz.workspace = true
 cancellation.workspace = true
 chrono.workspace = true
 crossbeam.workspace = true
 futures.workspace = true
+futures-timer.workspace = true
 dyn-clone.workspace = true
 dyn-eq.workspace = true
 hex.workspace = true
@@ -30,23 +32,29 @@ tokio.workspace = true
 tokio-util.workspace = true
 tracing.workspace = true
 pluto-eth2util.workspace = true
+pluto-ssz.workspace = true
 tree_hash.workspace = true
+unsigned-varint.workspace = true
 
 [dev-dependencies]
+anyhow.workspace = true
 alloy.workspace = true
+clap.workspace = true
 rand.workspace = true
 libp2p.workspace = true
+k256.workspace = true
 prost.workspace = true
 prost-types.workspace = true
 hex.workspace = true
 chrono.workspace = true
 test-case.workspace = true
 pluto-eth2util.workspace = true
+pluto-cluster.workspace = true
 pluto-p2p.workspace = true
 pluto-testutil.workspace = true
+pluto-tracing.workspace = true
 tokio = { workspace = true, features = ["test-util"] }
 wiremock.workspace = true
-pluto-ssz.workspace = true
 
 [build-dependencies]
 pluto-build-proto.workspace = true

crates/core/Cargo.toml

@@ -27,6 +27,11 @@ pub mod deadline;
 pub mod parsigdb;
 
 mod parsigex_codec;
+// SSZ codec operates on compile-time-constant byte sizes and offsets.
+// Arithmetic is bounded and casts from `usize` to `u32` are safe because all
+// sizes are well below `u32::MAX`.
+#[allow(clippy::arithmetic_side_effects, clippy::cast_possible_truncation)]
+pub(crate) mod ssz_codec;
 
 pub use parsigex_codec::ParSigExCodecError;