feat(IIP-59): PR A — era-based genesis params + IsEraBoundary helper#4939
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Additive scaffolding for the era-based voter reward distribution
described in the design doc (IIP-59 §8):
- blockchain/genesis: three new Rewarding fields
- EpochsPerRewardEra (default 24): epochs per voter-reward era
- VoterBudgetPerBlock (default 2000): max voters credited per block
during the era-boundary chunked credit path
- CompoundBatchSize (default 500): max voters swept per block by the
background compound sweep
Not part of the genesis Hash proto — no consensus impact until a
subsequent PR wires them into a fork-gated code path.
- action/protocol: IsEraBoundary(epochNum, epochsPerEra) helper.
Epoch 0 is never a boundary; epochsPerEra=0 disables the cadence
entirely so existing tests are undisturbed.
Follow-up PRs (B/C/D) consume these; no behavioral change here.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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Summary
First PR in the IIP-59 v2 (era-based) implementation sequence — pure additive scaffolding, no behavior change. Follow-ups (PR B/C/D/F) will consume the fields and helper introduced here.
blockchain/genesis.Rewardinggains three fields with mainnet-target defaults:EpochsPerRewardEra(24) — voter reward era length in epochsVoterBudgetPerBlock(2000) — max voters credited per block during the era-boundary chunked credit path (Phase 2)CompoundBatchSize(500) — max voters swept per block by the deferred compound sweep (Phase 3)These are NOT added to the
iotextypes.GenesisRewardingproto used byGenesis.Hash(), so this PR does not change the genesis hash. Consensus impact only arrives when a subsequent PR gates behavior on them behind the existing IIP-59 fork.action/protocol.IsEraBoundary(epochNum, epochsPerEra) bool— small predicate the PR B/C sites will use to decide whether a given epoch is an era boundary. Epoch 0 is intentionally never a boundary;epochsPerEra == 0disables the cadence entirely so existing tests are undisturbed.docs/iip-59-distribution-architecture.md— design doc that scopes the era-based rework and enumerates the follow-up PRs. Included in this PR so reviewers of PR B/C/D can reference it.Motivation, three-phase decomposition, and per-era rationale live in the amended IIP-59 §8.
Test plan
go build ./...go vet ./blockchain/genesis/ ./action/protocol/go test ./blockchain/genesis/... ./action/protocol/...(828 tests, all passing)TestHashstill matches the previously-frozen hash — confirms the new fields are outside the consensus-relevant proto.TestIIP59EraDefaults— asserts default field values load through the yaml parser unchanged.TestIsEraBoundary— 11 subtests covering epoch 0,epochsPerEra == 0,epochsPerEra == 1, exact multiples, off-by-one on either side, and large multiples.Follow-ups (not in this PR)
SnapshotForEpochRewardwrites onIsEraBoundary.🤖 Generated with Claude Code