feat(billing): fund draining deployments as soon as credits are added - #3590
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baktun14 wants to merge 1 commit into
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feat(billing): fund draining deployments as soon as credits are added#3590baktun14 wants to merge 1 commit into
baktun14 wants to merge 1 commit into
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When credits land on a managed wallet, immediately fund that account's draining deployments instead of waiting up to an hour for the top-up cron. A manually paying user whose deployment is about to drain no longer risks it closing minutes after they paid to keep it alive. RefillService.topUpWallet publishes a FundDrainingDeploymentsCommand once credits land; a background handler reuses the cron's per-owner funding path (auto-top-up gate, partial-balance clamp, wallet-reload follow-up). Publishing goes through DomainEventsService, which swallows enqueue errors, so funding can never affect payment processing, and the hourly cron remains the safety net.
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📝 WalkthroughWalkthroughThe change adds wallet-specific draining deployment funding jobs. Wallet top-ups publish commands, deployment services resolve and fund draining deployments with fresh balances, and the application registers a concurrent job handler. ChangesDraining deployment funding
Estimated code review effort: 4 (Complex) | ~45 minutes Mergeability Score: 🟠 High · up to This change adds immediate deployment funding after credits arrive, but the current implementation can both report a failed payment flow after credits are already applied and overfund deployments when funding jobs overlap. These correctness risks should be fixed before merge. Possibly related PRs
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🧪 Generate unit tests (beta)
Warning There were issues while running some tools. Please review the errors and either fix the tool's configuration or disable the tool if it's a critical failure. 🔧 ESLint
apps/api/src/app/providers/jobs.provider.tsESLint skipped: missing config or dependency (missing-dependency). The ESLint configuration references a package that is not available in the sandbox. apps/api/src/app/services/fund-draining-deployments/fund-draining-deployments.handler.spec.tsESLint skipped: the ESLint configuration for this file references a package that is not available in the sandbox. apps/api/src/app/services/fund-draining-deployments/fund-draining-deployments.handler.tsESLint skipped: the ESLint configuration for this file references a package that is not available in the sandbox.
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Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## main #3590 +/- ##
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- Coverage 76.65% 75.96% -0.70%
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Files 1142 1054 -88
Lines 29810 27500 -2310
Branches 7431 6969 -462
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- Hits 22850 20889 -1961
+ Misses 6129 5812 -317
+ Partials 831 799 -32
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Inline comments:
In `@apps/api/src/billing/services/refill/refill.service.ts`:
- Around line 81-83: Update topUpWallet around the DomainEventsService.publish
call for FundDrainingDeploymentsCommand so enqueue failures are caught and
logged without rethrowing, allowing the already-completed top-up to succeed.
Keep the publish operation outside the transaction and preserve the existing
hourly funding pass as the fallback.
In
`@apps/api/src/deployment/services/top-up-managed-deployments/top-up-managed-deployments.service.ts`:
- Around line 65-73: Serialize top-up processing per wallet in
topUpDrainingDeploymentsForOwner by acquiring a distributed lock or keyed
single-flight guard before deployment lookup and holding it through balance
retrieval and `#fundOwnerDeployments` transaction submission, then always
releasing it. Add a test that runs concurrent same-owner calls and verifies
funding is submitted only once.
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📒 Files selected for processing (12)
apps/api/src/app/providers/jobs.provider.tsapps/api/src/app/services/fund-draining-deployments/fund-draining-deployments.handler.spec.tsapps/api/src/app/services/fund-draining-deployments/fund-draining-deployments.handler.tsapps/api/src/billing/commands/fund-draining-deployments.command.tsapps/api/src/billing/services/refill/refill.service.spec.tsapps/api/src/billing/services/refill/refill.service.tsapps/api/src/deployment/services/cached-balance/cached-balance.service.spec.tsapps/api/src/deployment/services/cached-balance/cached-balance.service.tsapps/api/src/deployment/services/draining-deployment/draining-deployment.service.spec.tsapps/api/src/deployment/services/draining-deployment/draining-deployment.service.tsapps/api/src/deployment/services/top-up-managed-deployments/top-up-managed-deployments.service.spec.tsapps/api/src/deployment/services/top-up-managed-deployments/top-up-managed-deployments.service.ts
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stalniy
approved these changes
Aug 14, 2026
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Why
Fixes CON-761
When a wallet has no credits, the hourly top-up pass skips its draining deployments. If the user then buys credits, nothing funds those deployments until the next hourly pass, so a deployment with under an hour of runway can be closed by the provider minutes after the user paid to keep it alive. Auto-reload users rarely reach this state; manually-paying users are the exposed group.
What
When credits land on a managed wallet (card purchase, auto-reload charge, admin manual credit, or coupon),
RefillService.topUpWalletpublishes aFundDrainingDeploymentsCommand. A background handler funds that account's draining deployments right away, reusing the per-owner path the hourly cron already runs. This is the same event-driven shape as CON-735 (fund on lease start).RefillService.topUpWalletpublishes the command viaDomainEventsServiceonce credits land. Publishing swallows enqueue errors and the enqueue is transactional with the credit, so it can never affect payment processing, and the hourly cron stays the safety net.TopUpManagedDeploymentsService.topUpDrainingDeploymentsForOwnerfunds one owner's draining deployments. The cron loop body is extracted into a shared private method so both paths behave identically (auto-top-up gate, partial-balance clamp, wallet-reload follow-up).DrainingDeploymentService.findDrainingDeploymentsForOwnerreturns a single owner's active draining deployments using the same look-ahead window and closed-marking as the cron sweep.CachedBalanceService.getFreshreads a fresh balance for the immediate path. The existinggetmemoizes per address for the process lifetime, which suits the short-lived cron CLI but would serve stale balances to the long-running background worker across successive credit landings.Acceptance criteria are covered by the reused logic: auto-top-up-disabled deployments are excluded by the existing SQL gate, partial coverage falls out of
reserveSufficientAmount, and trials keep the cron's existing clamped behavior (a purchase ends the trial anyway).No new env vars, migrations, or breaking contract changes.
Tests
Full
apps/apiunit suite passes (1357 tests). New coverage: the publish payload and singleton key, handler delegation and retry, the per-owner draining query (active, closed-marking, empty), the immediate funding path (single tx, fresh balance, no-op when nothing drains), andgetFresh.Follow-ups
Refs CON-837. Two concurrency gaps raised in review were deferred to keep this PR focused: a bounded duplicate-deposit race when immediate funding overlaps the hourly cron (or a retry), and concurrency-safe instrumentation for the immediate path. Both come from reusing the single-threaded cron internals under the always-on handler, and neither changes funding correctness beyond over-funding the user's own escrow from their own authorized limit, which self-corrects when the deployment closes.
Summary by CodeRabbit
New Features
Bug Fixes
Tests