feat(minibf): add /governance/dreps - #1121
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Squash of PR #1121 rebased onto main after #1130 (governance singleton), with fold adjustments to remove the overlap between the two: - DRepState.first_seen_at moves from CBOR index 8 to 9 (8 is taken by the phase-3 expiry field on main) - DRepSeen is appended after GovDormancyReset in CardanoDelta so the WAL variant positions of the merged gov deltas stay untouched - the DRepRegistration prev_anchor/anchor-apply edit is dropped: the delta's released WAL shape is frozen, and main already persists the registration anchor via DRepAnchorUpdate on every RegDRepCert (#1128) - compat tests extended to prove index-9 decode behavior for legacy rows Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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Actionable comments posted: 1
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Inline comments:
In `@crates/cardano/src/model/dreps.rs`:
- Around line 377-380: Update the first_seen_at initialization logic to choose
the earlier reference between the existing registered_at value and the current
(self.slot, self.txorder) sighting, preserving existing first_seen_at values.
Add a regression test covering a legacy row with registered_at set and
first_seen_at unset, followed by a later certificate.
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📒 Files selected for processing (8)
CHANGELOG.mdcrates/cardano/src/model/dreps.rscrates/cardano/src/model/mod.rscrates/cardano/src/roll/dreps.rscrates/minibf/src/lib.rscrates/minibf/src/mapping.rscrates/minibf/src/test_support.rsdocs/content/apis/minibf.mdx
🚧 Files skipped from review as they are similar to previous changes (7)
- crates/minibf/src/mapping.rs
- crates/minibf/src/lib.rs
- docs/content/apis/minibf.mdx
- CHANGELOG.md
- crates/cardano/src/roll/dreps.rs
- crates/cardano/src/model/mod.rs
- crates/minibf/src/test_support.rs
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@copilot resolve the merge conflicts in this pull request |
Resolved the merge conflicts and merged |
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I tested this PR against live Blockfrost (preview and mainnet) and the official blockfrost-tests suite. Summary below; details in the inline comments.
Each inline comment carries a severity label: 🔴 high = fix before merge, 🟡 medium = BF-parity or spec divergence, 🟢 low = cleanup/nit.
What works well
- All 5 official by-id fixtures pass (CIP-129, legacy, script-hash, special IDs). All pagination-error cases pass.
- I diffed the full DRep population against live BF preview: 15,047 shared rows.
retired,expired,last_active_epoch, andhas_scriptshow zero mismatches. The expiry math (including the<boundary fix) is correct. DRepSeenmatches BF semantics. BF lists never-registered DReps (vote-delegation targets,active_epoch: null) and the special DReps. Materializing them is right.
Divergences found (live-verified)
| Case | dolos | BF (preview + mainnet) |
|---|---|---|
CIP-129 header 0x20/0x21/0x24 |
404 | 400 |
drep_vkh1… id |
200 | 400 |
?retired= / ?expired= / ?order_by=amount |
ignored | filtered/sorted |
amount |
live account fold | epoch-boundary drep_distr snapshot (164/15047 rows differ; one retired DRep: dolos 519640002, BF 0) |
7 of the official governance/dreps list-matrix tests fail on the missing query params.
Main concerns
- Every request to both routes scans the full accounts namespace. The by-id route regresses from an O(1)
voting_powerread to O(all accounts). See inline comment. - The list route live-fetches up to 100 attacker-controlled anchor URLs per request, uncached, with no private-IP guard (SSRF). backend-ryo serves this from db-sync's offchain store instead.
DRepSeenfires for certs in phase-2-invalid txs. Sibling cert handlers guard ontx.is_valid().
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Actionable comments posted: 3
🤖 Prompt for all review comments with AI agents
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only still-valid issues, skip the rest with a brief reason, keep changes
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Inline comments:
In `@crates/cardano/src/roll/dreps.rs`:
- Around line 227-233: Update the DRepSeen emission in the tx.is_valid() block
to skip DRep::Abstain and DRep::NoConfidence, emitting only credential-backed
DReps returned by pallas_extras::cert_as_vote_delegation. Preserve the existing
DRepSeen::new flow for credential-backed targets.
In `@crates/minibf/src/routes/governance/metadata.rs`:
- Around line 94-114: Update is_fetchable and the request path to validate the
resolved socket address, not only the URL hostname: resolve each target hostname
and reject any address where ip_is_public is false before connecting, while
preserving the existing scheme and localhost checks. Ensure redirect handling
applies the same resolved-address validation so DNS rebinding or redirected
private hosts cannot bypass the fetch restriction.
In `@crates/minibf/src/routes/governance/mod.rs`:
- Around line 135-149: The governance route’s page-building flow currently
performs unbounded concurrent fetch_drep_metadata calls and repeats immutable
anchor fetches on every request. Add a cache keyed by anchor URL and content
hash, reuse cached metadata without revalidation, and bound per-request
metadata-fetch concurrency while preserving the existing drep_list_item and
error-handling behavior.
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📒 Files selected for processing (18)
CHANGELOG.mdcrates/cardano/src/ewrap/loading.rscrates/cardano/src/model/dreps.rscrates/cardano/src/model/mod.rscrates/cardano/src/roll/dreps.rscrates/minibf/src/lib.rscrates/minibf/src/mapping.rscrates/minibf/src/routes/governance/dreps.rscrates/minibf/src/routes/governance/metadata.rscrates/minibf/src/routes/governance/mod.rscrates/minibf/src/test_support.rscrates/snapshot/src/namespaces.rscrates/snapshot/tests/export.rscrates/snapshot/tests/goldens.rscrates/snapshot/tests/registry/canaries.rscrates/snapshot/tests/registry/goldens/dreps.rev2.hexcrates/snapshot/tests/registry/mod.rsdocs/content/apis/minibf.mdx
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- crates/cardano/src/ewrap/loading.rs
🚧 Files skipped from review as they are similar to previous changes (1)
- docs/content/apis/minibf.mdx
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/governance/dreps
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🟡 Changes recommended
Expiry correctness, legacy ordering, SSRF protection, and unbounded disk-cache growth need resolution.
Once you've addressed the issues Copilot identified, you can request another Copilot review.
Review details
Suppressed comments (1)
crates/minibf/src/routes/governance/mod.rs:136
- Existing on-disk DRep rows decode
first_seen_atasNone, and there is no migration to populate it. Immediately after upgrading, all historical DReps therefore receive the same maximum sort key and are ordered by entity key rather than first appearance; only a future certificate happens to backfill a row. Backfill this field during upgrade/restore, or provide a lifecycle-stamp fallback for legacy rows before sorting.
let appeared_at = state.first_seen_at.unwrap_or((u64::MAX, usize::MAX));
- Files reviewed: 20/20 changed files
- Comments generated: 4
- Review effort level: Balanced
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| IpAddr::V6(ip) => { | ||
| let unique_local = (ip.segments()[0] & 0xfe00) == 0xfc00; | ||
| let link_local = (ip.segments()[0] & 0xffc0) == 0xfe80; | ||
|
|
||
| !(ip.is_loopback() || ip.is_unspecified() || unique_local || link_local) | ||
| } |
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| async fn write(&self, hash: Hash<32>, body: Vec<u8>) { | ||
| static SEQ: AtomicU64 = AtomicU64::new(0); | ||
|
|
||
| let dir = self.dir.clone(); | ||
| let path = self.path(&hash); |
Comment on lines
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| pub fn drep_is_expired( | ||
| state: &DRepState, | ||
| chain: &ChainSummary, | ||
| tip: BlockSlot, | ||
| pparams: &PParamsSet, | ||
| ) -> bool { | ||
| if drep_is_retired(state) { | ||
| return false; | ||
| } | ||
|
|
||
| let last_active_epoch = state.last_active_slot.map(|x| chain.slot_epoch(x).0); | ||
| let inactivity_period = pparams.drep_inactivity_period().unwrap_or_default(); | ||
| let expiring_epoch = last_active_epoch.map(|x| x + inactivity_period); | ||
| let (current_epoch, _) = chain.slot_epoch(tip); | ||
|
|
||
| expiring_epoch | ||
| .map(|expiration| expiration < current_epoch) | ||
| .unwrap_or(false) | ||
| } |
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| async fn governance_dreps_list_order_by_amount() { | ||
| let app = TestApp::new(); | ||
|
|
||
| let models = get_dreps_list(&app, "/governance/dreps?order_by=amount").await; | ||
| assert_eq!(models.len(), 1); | ||
|
|
||
| let models = get_dreps_list(&app, "/governance/dreps?order_by=amount&order=desc").await; | ||
| assert_eq!(models.len(), 1); |
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This PR resolves: #1086
offcahin metadata cahce example in the repo:
Summary by CodeRabbit
GET /governance/drepswith pagination, ordering, and retired/expired filters./governance/dreps/{drep_id}, supporting legacy, modern, and special identifiers.