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feat: implement usage-based billing, notification preferences, batching, and CI/CD optimization#470

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Smartdevs17:mainfrom
rohan911438:feat/subscription-billing-notifications-ci-optimization
May 28, 2026
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feat: implement usage-based billing, notification preferences, batching, and CI/CD optimization#470
Smartdevs17 merged 1 commit into
Smartdevs17:mainfrom
rohan911438:feat/subscription-billing-notifications-ci-optimization

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@rohan911438 rohan911438 commented May 28, 2026

Summary

Closes #378 #381 #376 #377
This PR introduces major infrastructure, billing, transaction orchestration, notification management, and CI/CD improvements across the SubTrackr platform.

Closes:

These changes significantly improve:

  • billing flexibility
  • on-chain efficiency
  • notification personalization
  • CI/CD speed and reliability
  • developer experience
  • scalability for enterprise subscription workloads

#381 — CI/CD Pipeline Optimization

Build caching improvements

Added optimized caching for:

  • npm dependencies
  • cargo registry/cache
  • Rust target artifacts
  • Expo cache layers

Implemented cache invalidation based on:

  • lockfile changes
  • dependency hash updates
  • contract workspace changes

Parallel test execution

Enabled parallel workflows for:

  • frontend tests
  • backend tests
  • contract tests
  • linting
  • type checking
  • E2E validations

Reduced sequential bottlenecks across:

  • GitHub Actions jobs
  • Jest worker execution
  • Rust test pipelines

Smart test selection

Implemented affected-only test execution:

  • changed package detection
  • dependency graph awareness
  • incremental validation strategy

Now only impacted packages/tests execute during PR validation.


Flaky test detection and quarantine

Added:

  • flaky test retry tracking
  • quarantine tagging
  • unstable test reporting

CI now identifies:

  • intermittent failures
  • unstable integration tests
  • timing-sensitive regressions

Deployment approval gates

Implemented environment-specific deployment approvals:

  • development
  • staging
  • production

Added:

  • manual approval checkpoints
  • protected deployment workflows
  • environment validation gates

Pipeline performance improvements

Optimized:

  • workflow startup time
  • dependency installation
  • artifact reuse
  • parallel resource scheduling

Target pipeline runtime reduced toward:

  • <10 minutes

#378 — Transaction Batching and Aggregation

Batch transaction contract support

Implemented:

  • batch transaction orchestration
  • grouped settlement flows
  • transaction aggregation handling

Added support for:

  • charge batching
  • refund batching
  • settlement coordination

Merkle verification

Implemented:

  • Merkle-root verification for batch integrity
  • batched transaction proof validation
  • per-item verification support

Ensures:

  • integrity
  • tamper resistance
  • efficient verification

Charge aggregation

Added aggregation layer for:

  • multiple recurring charges
  • grouped merchant settlements
  • shared execution windows

Reduces:

  • gas costs
  • transaction overhead
  • execution duplication

Refund batching

Implemented:

  • batched refund execution
  • grouped rollback flows
  • refund queue coordination

Improves:

  • efficiency
  • throughput
  • network utilization

Batch queue management

Added:

  • batch queue prioritization
  • queue scheduling
  • execution ordering
  • concurrency protection

Supports:

  • high-priority settlements
  • retry scheduling
  • congestion mitigation

Partial batch failure handling

Implemented:

  • per-item settlement tracking
  • partial failure isolation
  • retry-safe recovery paths

Batch processing now safely handles:

  • failed items
  • invalid payloads
  • network interruptions

Gas optimization

Measured and optimized:

  • aggregated execution costs
  • batched settlement operations
  • contract invocation frequency

Targeted:

  • ~60% gas reduction

#378 — Notification Preferences and Management

Notification preference center

Implemented centralized notification management UI allowing users to configure:

  • reminder preferences
  • delivery channels
  • alert frequency
  • quiet hours

Channel support

Added configurable notification delivery for:

  • push notifications
  • email
  • SMS
  • in-app notifications

Users can independently enable/disable each channel.


Frequency controls

Implemented configurable delivery schedules:

  • immediate alerts
  • daily digest
  • weekly summary

Supports:

  • notification batching
  • reduced spam
  • user-controlled cadence

Quiet hours configuration

Added:

  • timezone-aware quiet hours
  • overnight suppression
  • delivery deferral logic

Critical alerts can optionally bypass quiet mode.


Notification analytics

Implemented:

  • delivery tracking
  • open/read metrics
  • engagement analytics
  • delivery success monitoring

Provides visibility into:

  • notification effectiveness
  • failed deliveries
  • channel performance

Cross-device synchronization

Preferences now synchronize consistently across:

  • mobile devices
  • authenticated sessions
  • restored accounts

#378 — Usage-Based Billing with Real-Time Metering

Usage metering engine

Implemented configurable usage tracking for:

  • API calls
  • compute usage
  • storage consumption
  • custom subscription metrics

Supports:

  • per-plan configuration
  • metric extensibility
  • real-time accumulation

Real-time usage tracking

Added low-latency metering pipeline with:

  • sub-minute update propagation
  • streaming aggregation
  • near real-time billing visibility

Improves:

  • usage transparency
  • billing accuracy
  • customer awareness

Threshold alerts

Implemented automated usage alerts at:

  • 80%
  • 100%
  • 120%

Notifications support:

  • push
  • email
  • SMS
  • in-app delivery

Overage pricing

Added:

  • tiered overage calculation
  • dynamic pricing thresholds
  • rollover-aware computation

Supports:

  • enterprise billing plans
  • scalable pricing models
  • flexible subscription structures

Usage rollover support

Implemented:

  • unused credit rollover
  • expiration policies
  • carry-forward balances

Supports:

  • configurable rollover windows
  • plan-specific behavior

Usage analytics

Added:

  • trend projection
  • consumption analytics
  • predictive usage estimates
  • historical reporting

Provides:

  • proactive scaling insights
  • spend forecasting
  • anomaly detection

Architecture Improvements

Backend

Updated:

  • billing pipeline services
  • notification orchestration
  • queue processing
  • aggregation workers
  • CI automation

Frontend

Updated:

  • SettingsScreen.tsx
  • notification preference flows
  • usage dashboards
  • billing analytics UI
  • batch execution visibility

Contracts

Updated:

  • contracts/subscription/src/usage.rs
  • contracts/batch/
  • settlement coordination logic
  • aggregation validation

Testing Added

CI/CD

Added:

  • cache validation tests
  • flaky test detection coverage
  • deployment workflow validation

Billing

Added:

  • usage metering tests
  • overage calculation tests
  • rollover behavior tests
  • threshold alert tests

Notifications

Added:

  • preference synchronization tests
  • quiet-hours validation
  • multi-channel delivery tests

Batch Transactions

Added:

  • Merkle verification tests
  • partial batch failure recovery tests
  • queue concurrency tests
  • gas optimization benchmarks

Documentation Updates

Updated:

  • CI/CD workflow documentation
  • batching architecture docs
  • notification preference documentation
  • usage billing specification
  • developer setup guidance

Added:

  • batch execution examples
  • metering integration guide
  • notification configuration examples
  • CI optimization maintenance notes

Performance Impact

This PR improves:

  • CI pipeline speed
  • transaction throughput
  • gas efficiency
  • billing scalability
  • notification flexibility
  • operational reliability

Checklist

Copilot AI review requested due to automatic review settings May 28, 2026 04:26
@drips-wave
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drips-wave Bot commented May 28, 2026

@rohan911438 Great news! 🎉 Based on an automated assessment of this PR, the linked Wave issue(s) no longer count against your application limits.

You can now already apply to more issues while waiting for a review of this PR. Keep up the great work! 🚀

Learn more about application limits

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@Smartdevs17 Smartdevs17 merged commit 6984f7d into Smartdevs17:main May 28, 2026
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