ERA File Test Vectors

Minimal preset test vectors for ERA file import/export testing.

Network Configuration

Preset: minimal (SLOTS_PER_EPOCH=8, SLOTS_PER_HISTORICAL_ROOT=64)
One ERA file = 64 slots = 8 epochs
Validators: 1024
Fork schedule: All forks active from genesis (Electra), Fulu at epoch 100000

config.yaml — Network configuration (CL fork schedule + parameters)
genesis.ssz — Genesis state (SSZ encoded)
era/ — 13 ERA files (minimal-00000 through minimal-00012)
- 832 slots total (epochs 0-103)
- ~2.4MB compressed

Generation

Generated using Nimbus launch_local_testnet.sh with --preset minimal --nodes 2 --stop-at-epoch 100 --run-geth --run-spamoor, then exported via ncli_db exportEra.

ERA files contain real blocks with execution payloads (transactions generated by spamoor).

Test Coverage

Consumer Tests (4 tests)

era_consumer_imports_all_files — Imports all 13 ERA files into a fresh store, verifies 768 block root index entries
era_consumer_blocks_are_readable — Verifies all 767 unique blocks are loadable from the store
era_consumer_genesis_state_intact — Verifies genesis state with 1024 validators
era_files_are_parseable — Verifies all ERA files can be parsed by reth_era library

Producer Test (1 test)

era_producer_generates_identical_files — Re-exports ERA files from imported data and verifies byte-for-byte match with original Nimbus-generated files

All tests passing ✅

README.md