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WalkthroughThis PR introduces an immutable audit trail system for fee distributions in the order book. It adds new migration files that create audit tables ( Changes
Sequence DiagramsequenceDiagram
participant Client
participant DistributeFees as distribute_fees<br/>(Migration 033)
participant Vault
participant AuditTables as Audit Tables<br/>(Migration 036)
participant QueryAPI as Public Query<br/>Actions
Client->>DistributeFees: Trigger fee distribution<br/>(with LP reward samples)
DistributeFees->>Vault: Execute vault transfers<br/>(Step 1-5)
Vault-->>DistributeFees: Transfers complete
alt Wallets to distribute to
DistributeFees->>AuditTables: Step 5.5: Create distribution<br/>record in ob_fee_distributions
AuditTables-->>DistributeFees: distribution_id generated
DistributeFees->>AuditTables: Insert per-LP details<br/>in ob_fee_distribution_details
AuditTables-->>DistributeFees: Detail records inserted
DistributeFees->>DistributeFees: Delete ob_rewards
else No wallets
DistributeFees->>DistributeFees: Skip audit record creation
end
Client->>QueryAPI: Query distribution history
QueryAPI->>AuditTables: Select from audit tables
AuditTables-->>QueryAPI: Return audit records
QueryAPI-->>Client: Distribution summary &<br/>per-LP reward details
Estimated code review effort🎯 3 (Moderate) | ⏱️ ~20 minutes Areas requiring extra attention:
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Pre-merge checks and finishing touches✅ Passed checks (3 passed)
✨ Finishing touches
🧪 Generate unit tests (beta)
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Actionable comments posted: 0
🧹 Nitpick comments (2)
internal/migrations/036-order-book-audit.sql (1)
104-126: Consider adding a composite index for market timeline queries.The current indexes cover single-column queries well. For queries like "show distribution history for market X over time", a composite index would be more efficient:
+/** + * Composite index for market timeline queries + * Query pattern: "Show distribution history for Market #123 ordered by time" + */ +CREATE INDEX IF NOT EXISTS idx_fee_dist_query_time + ON ob_fee_distributions(query_id, distributed_at DESC);internal/migrations/033-order-book-settlement.sql (1)
187-277: Consider optimizing audit record creation for better performance.The current implementation uses a nested loop pattern with
LIMIT/OFFSET(line 230) to pair wallet addresses with reward amounts, resulting in O(n²) complexity. While correct and acceptable for typical LP counts (<100), this could be optimized.Current pattern:
for $w_row in SELECT wallet FROM UNNEST($wallet_addresses) AS w(wallet) { -- Use LIMIT 1 OFFSET ($idx - 1) to get corresponding amount for $a_row in SELECT amount FROM UNNEST($amounts) LIMIT 1 OFFSET ($idx - 1) { $reward_amount := $a_row.amount; } $idx := $idx + 1; }Suggested refactor using UNNEST with multiple arrays:
for $lp_data in SELECT wallet, amount, ROW_NUMBER() OVER () as row_num FROM UNNEST($wallet_addresses, $amounts) AS u(wallet, amount) { -- Direct access to paired values, no LIMIT/OFFSET needed -- Fetch participant info once per LP ... }This eliminates the O(n²) array access pattern and simplifies the code. However, given typical LP counts are small, the current implementation is acceptable.
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📒 Files selected for processing (5)
internal/migrations/032-order-book-actions.sql(5 hunks)internal/migrations/033-order-book-settlement.sql(5 hunks)internal/migrations/034-order-book-rewards.sql(1 hunks)internal/migrations/036-order-book-audit.sql(1 hunks)tests/streams/order_book/fee_distribution_audit_test.go(1 hunks)
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🧬 Code graph analysis (1)
tests/streams/order_book/fee_distribution_audit_test.go (1)
internal/migrations/migration.go (1)
GetSeedScriptStatements(60-109)
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🔇 Additional comments (8)
internal/migrations/032-order-book-actions.sql (1)
314-314: LGTM! Documentation cleanup.The removal of historical issue references from comments improves readability and removes internal tracking details from the codebase.
Also applies to: 1274-1294, 1868-1870, 2117-2118, 2143-2143
internal/migrations/036-order-book-audit.sql (2)
150-261: LGTM! Well-designed query actions with consistent wallet handling.The three public actions provide comprehensive audit trail querying capabilities:
- Market-based summaries
- Distribution-level details
- Participant reward history
The wallet address normalization (lines 243-245) and case-insensitive comparison (line 256) correctly handle variations in input format.
49-94: The CASCADE DELETE behavior is explicitly documented as intentional in the migration file.The migration header states the purpose is to "Create immutable audit tables to track fee distribution history. Ensures compliance, user transparency, and data preservation." The comment in lines 51-53 explicitly documents: "CASCADE deleted when market (ob_queries) is deleted" as part of the intended lifecycle. This design ensures audit records remain permanently for each market's lifetime but are cleaned up when the market itself is deleted, preventing orphaned records. The CASCADE behavior is correct and aligns with the documented design.
internal/migrations/034-order-book-rewards.sql (1)
2-2: LGTM! Documentation cleanup.Consistent with the cleanup in other migration files, removing internal issue tracking references.
internal/migrations/033-order-book-settlement.sql (1)
9-9: LGTM! Clear documentation of audit trail integration.The updated documentation clearly explains:
- The audit trail creation process
- Edge cases (no samples → no audit record)
- Dependencies on new migration 036
- Data preservation guarantees
The comment on line 280 correctly notes that audit records now preserve distribution history before cleanup.
Also applies to: 58-102, 280-280
tests/streams/order_book/fee_distribution_audit_test.go (3)
1-43: LGTM! Well-structured test suite.The test suite follows kwil-db testing conventions:
- Proper build tag isolation (
//go:build kwiltest)- Uses platform testing framework
- Seeds with migration scripts for consistency
- Organized into focused test scenarios
480-551: LGTM! Well-designed helper functions.Both helper functions follow good practices:
setupLPScenario (lines 480-503):
- Creates realistic LP positions with paired orders
- Proper error checking with
require.NoErrorfundVaultAndDistributeFees (lines 505-551):
- Correctly converts
big.InttoNUMERIC(78,0)usingParseDecimalExplicit(line 523)- Proper TxContext construction with test overrides
- Comprehensive error handling (checks both
errandres.Error)
45-478: Test structure uses sequential execution; global state reset pattern is intentional.The
lastBalancePointglobal variable is intentionally reset at the start of each test function. These tests run sequentially withinRunSchemaTest(not.Parallel()calls), so the explicit resets prevent cross-test contamination while relying on sequential execution order. This pattern is acceptable for the test framework being used, though it would be problematic if tests were ever parallelized.Test coverage is comprehensive:
- ✅ Basic audit record creation with zero-loss verification
- ✅ Multi-block sampling (3 blocks)
- ✅ Edge case: no LPs → no audit
- ✅ Edge case: zero fees → no audit
- ✅ Data integrity: audit matches actual balance changes
Callback-based result handling correctly uses
*kwilTypes.DecimalforNUMERIC(78,0)fields.
1 participant
resolves: https://github.com/truflation/website/issues/2923
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