Crate confium_coordinator 

Distributed threshold signing coordinator.

The coordinator orchestrates threshold signing sessions across distributed signers. It provides:

• TCP server + client for network communication
• Multi-round protocol state machine
• Policy enforcement (time windows, rate limits, thresholds)
• Rate limiting, backpressure, circuit breaker
• Prometheus metrics, Grafana dashboards, OTLP tracing
• Health checks, graceful shutdown
• Persistent session store, WAL, event sourcing
• Admin API, diagnostics
• DKG coordination, share refresh

Modules

async_event_store

Async event-sourced store with batch writes and crash recovery.

async_session_manager

Async session manager — non-blocking session lifecycle.

chaos_testing

Chaos testing harness — random failure injection.

circuit_breaker

Circuit breaker pattern — fail fast on downstream failures.

config_validator

Configuration validator — pre-flight checks for coordinator/daemon configs.

coordinator

Async session coordinator for distributed threshold signing.

coordinator_factory

Coordinator factory — builder pattern with dependency injection.

coordinator_proptest

Property-based tests for the coordinator state machine.

di_container

Dependency injection container for coordinator components.

distributed_lock

Distributed lock manager — TTL-based leases with fencing tokens.

dkg_coordinator

DKG coordinator protocol — distributed key generation.

event_sourced

Event-sourced session store.

marketplace

Plugin marketplace schema — discovery and registry format.

noise_transport

Noise Protocol transport implementation.

perf_baseline

Performance baseline manager — save/load/compare Criterion baselines.

plugin_manifest

Plugin manifest schema — typed metadata for Confium plugins.

refresh_coordinator

Proactive share refresh coordinator.

request_coalescing

Request coalescing — merge duplicate concurrent requests.

resilience_and_circuits

Connection pool — TCP connection reuse. Health-check load balancer — route to healthy instances. Retry with jitter — improved backoff. Graceful degradation — serve stale data. WebSocket coordinator — real-time updates. Garbled circuits — secure 2PC. Efficient range proof — bulletproof-style. Bulk signing pipeline — high-throughput batching.

retry

Retry queue — exponential backoff for failed operations.

round_coordinator

Multi-round signing state machine.

saga

Saga pattern for multi-step ceremony management.

shutdown

Graceful shutdown — signal handling and session draining.

wal

Session write-ahead log — crash recovery via append-only log.