We architect and deploy custom smart contracts that form the backbone of your Web3 product. Our development process is built on security-first principles, utilizing battle-tested libraries like OpenZeppelin and rigorous internal audits to mitigate risk before deployment.
LABS
Services
Account Abstraction UserOp Bundlers
We develop and deploy high-performance ERC-4337 bundler services that aggregate UserOperations, manage gas sponsorship, and guarantee transaction inclusion for smart accounts.
Chainscore © 2026
overview
CORE SERVICE
Smart Contract Development
Secure, production-ready smart contracts built for scale and compliance.
- Token Standards:
ERC-20,ERC-721,ERC-1155, and custom implementations. - DeFi Protocols: DEXs, lending/borrowing pools, staking, and yield aggregators.
- Enterprise Logic: Multi-signature wallets, vesting schedules, and governance modules.
- Delivery: Full test suites, deployment scripts, and comprehensive documentation included.
From initial concept to mainnet launch, we ensure your contracts are gas-optimized, upgradeable, and secure, reducing time-to-market from months to weeks.
key-features-cards
PRODUCTION-READY INFRASTRUCTURE
Core Bundler Capabilities We Deliver
Our managed bundler service provides the critical infrastructure layer for Account Abstraction, handling UserOperation execution with enterprise-grade reliability, security, and performance.
01
High-Performance Bundler Node
Deploy a dedicated, high-availability bundler node with sub-second UserOperation processing and 99.9% uptime SLA. Built for high-volume dApps requiring predictable performance.
99.9%
Uptime SLA
< 500ms
Avg. Processing
02
Multi-Chain & Paymaster Integration
Seamless support for Ethereum, Polygon, Arbitrum, and other major EVM chains. Pre-integrated with flexible paymaster solutions for gas sponsorship and ERC-20 fee payment.
10+
Supported Chains
Pre-built
Paymaster API
03
Enterprise Security & Monitoring
Bundler infrastructure secured with SOC 2 principles, real-time threat detection, and comprehensive monitoring dashboards. Includes audit logs and alerting for all UserOperation activity.
24/7
Security Monitoring
SOC 2
Compliance Ready
04
Scalable Mempool Management
Intelligent UserOperation mempool with configurable policies for ordering, fee prioritization, and spam protection. Ensures reliable transaction inclusion under peak load.
10k+
Ops/Second Capacity
Dynamic
Fee Optimization
06
Dedicated Support & SLAs
Guaranteed response times, dedicated technical account management, and architecture reviews. We provide the operational certainty required for mission-critical applications.
< 15 min
P1 Response
Architecture Review
Included
benefits
MEASURABLE RESULTS
Business Outcomes of a Custom Bundler
A custom UserOp bundler is more than infrastructure; it's a strategic asset. We build bundlers that deliver tangible improvements to your user experience, operational efficiency, and bottom line.
01
Superior User Experience
We implement sponsored transactions and gasless onboarding to remove Web3 friction. Users sign with social logins and never see a gas fee, driving adoption and retention.
0 GAS
For End Users
> 40%
Higher Onboarding
02
Operational Cost Control
Our custom bundlers provide predictable, auditable gas spending. Set policies, whitelist operations, and batch transactions to reduce your aggregate gas costs by up to 30% versus public alternatives.
~30%
Gas Savings
Real-time
Cost Dashboard
04
Unmatched Reliability & Uptime
Deploy a dedicated bundler with a 99.9% uptime SLA, multi-chain redundancy, and 24/7 monitoring. Eliminate dependency on public RPC bottlenecks and ensure your app is always live.
99.9%
Uptime SLA
< 2 sec
P95 Latency
05
Faster Time-to-Market
Leverage our pre-built modules for common AA patterns. We deliver a production-ready, custom bundler tailored to your stack in under 3 weeks, not months.
< 3 weeks
To Production
Pre-audited
Core Modules
Infrastructure Decision Matrix
Build vs. Buy: Dedicated Bundler vs. Public Service
Compare the strategic, technical, and financial implications of building your own ERC-4337 bundler versus using a managed service. This analysis is critical for CTOs and technical founders planning scalable, secure account abstraction infrastructure.
| Critical Factor | Build In-House | Public Bundler Service | Chainscore Dedicated Bundler |
|---|---|---|---|
Time to Production | 6-9+ months | 1-2 days | 2-4 weeks |
Initial Development Cost | $150K - $400K+ | $0 (usage fees) | $25K - $75K |
Security Posture | High Risk (custom, unaudited code) | Shared Risk (public mempool) | Low Risk (audited, isolated deployment) |
Performance & Reliability | Your responsibility (variable) | Shared, unpredictable latency | Guaranteed 99.9% SLA, <1s p95 latency |
Customization & Control | Full control | None (standard API only) | Full control over rules, RPCs, and fee logic |
Ongoing Maintenance | Full-time DevOps/SRE team | Vendor-managed | Fully managed with optional 24/7 support |
MEV & Censorship Resistance | You define policy | Subject to provider policy | Fully customizable transaction ordering & inclusion policies |
Total Cost of Ownership (Year 1) | $300K - $700K+ | $10K - $50K+ (scales with volume) | $50K - $150K (predictable pricing) |
Best For | Teams with extensive blockchain infra expertise | Prototypes, very low-volume apps | Production applications requiring scale, security, and control |
how-we-deliver
PROVEN METHODOLOGY
Our Development & Deployment Process
A streamlined, security-first approach to deploying high-performance UserOp bundlers. We deliver production-ready infrastructure, not just code.
01
Architecture & Design Review
We analyze your use case to design a bundler architecture optimized for your specific needs—gas sponsorship, paymasters, or custom validation logic.
1-3 days
Design Sprint
3+ Options
Architecture Reviewed
02
Secure Smart Contract Development
Development of custom EntryPoint extensions, paymaster logic, and wallet factories using audited OpenZeppelin patterns and Solidity 0.8+.
100%
Coverage Target
Certik
Audit Partner
03
Bundler Node Implementation
Deployment of a high-availability bundler node (Rust or TypeScript) with mempool management, fee optimization, and multi-chain relay support.
99.9%
Uptime SLA
< 500ms
P95 Latency
04
Integration & Testing
End-to-end integration with your dApp frontend, including comprehensive test suites for UserOp validation, gas estimation, and failure scenarios.
2 weeks
Typical Timeline
E2E Tests
Full Coverage
05
Production Deployment & Monitoring
Secure cloud deployment (AWS/GCP) with real-time dashboards for transaction success rates, gas costs, and system health.
24/7
Monitoring
SLA Backed
Performance
06
Ongoing Support & Scaling
Dedicated technical support, regular performance reviews, and scaling guidance as your transaction volume grows across new chains.
< 1 hour
Response SLA
Multi-chain
Scalability
security-reliability
CORE SERVICE
Smart Contract Development
Secure, production-ready smart contracts built for scale and compliance.
We architect and deploy custom smart contracts that form the backbone of your Web3 product. Our development process is built on audited security patterns and gas-optimized code to ensure reliability and cost-efficiency from day one.
- Full-Stack Expertise:
Solidity,Rust (Solana),Vyper,Move (Aptos/Sui) - Security-First: Integration with OpenZeppelin, formal verification, and pre-audit reviews.
- Deployment & Management: Automated deployment pipelines, upgradeable proxy patterns, and on-chain monitoring.
Reduce your time-to-market with battle-tested contract templates and a 2-week MVP delivery guarantee for standard token or NFT projects.
Our engineers specialize in complex DeFi primitives, cross-chain bridges, and compliant tokenomics, delivering contracts that are secure by design and ready for mainnet.
Technical & Commercial Insights
ERC-4337 Bundler Development FAQs
Get clear, specific answers to the most common questions CTOs and technical founders ask when evaluating a bundler development partner.
For a standard, production-grade ERC-4337 bundler with core features (UserOp validation, mempool management, paymaster integration), we deliver in 3-4 weeks. Complex deployments with custom paymaster logic, multi-chain support, or advanced monitoring add 1-2 weeks. We provide a detailed project plan with weekly milestones after the initial scoping call.
ENQUIRY
Get In Touch
today.
Our experts will offer a free quote and a 30min call to discuss your project.
NDA Protected
Confidentiality24h Response
Time to ValueDirectly to Engineering Team
No Sales Fluff10+
Protocols Shipped
$20M+
TVL Overall