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LABS
Services
Account Abstraction Wallet-Card Fusion
We develop smart contract wallets using ERC-4337 to power your branded payment cards. Deliver gasless user onboarding, programmable spending controls, and social recovery in 6-8 weeks.
Chainscore © 2026
overview
FULL-STACK ENGINEERING
Custom Blockchain Development
End-to-end blockchain solutions built to your exact specifications, from protocol design to mainnet deployment.
- Protocol Design: Custom
EVMorSubstrate-based chains,zk-Rollups, andOptimistic Rollups. - Core Development: Smart contracts, validators, bridges, and RPC nodes.
- Deployment & DevOps: Mainnet launch with 99.9% uptime SLA, monitoring, and node orchestration.
Move from concept to a live, secure network in 8-12 weeks. We handle the entire stack so you can focus on your product.
key-features-cards
FULL-STACK WALLET-CARD FUSION
Core Technical Capabilities We Deliver
We architect and deploy the complete technical stack for your Account Abstraction-powered payment card, from smart account infrastructure to compliant card issuance. Our focus is on security, scalability, and a seamless user experience.
01
Smart Account Architecture
We design and deploy custom ERC-4337-compliant smart accounts with session keys, gas sponsorship, and batched transactions. This enables features like one-click approvals, automated payments, and social recovery.
ERC-4337
Standard
OpenZeppelin
Audited
02
Card Program Management
End-to-end integration with card networks and BIN sponsors for physical and virtual card issuance. We handle the complex compliance and technical integration, providing you with a ready-to-use card program API.
Visa/Mastercard
Network Ready
PCI DSS
Compliant
03
Gas Abstraction Engine
Build a seamless UX by removing gas friction. Our system manages gas sponsorship, fee estimation, and multi-chain payment routing, allowing end-users to transact without holding native tokens.
Paymaster
Integration
< 1 sec
Estimation
04
Real-Time On/Off-Ramp
Integrate secure, low-fiat-fee on-ramps and off-ramps directly into the wallet-card flow. We connect you with licensed providers for global card funding and crypto-to-bank withdrawals.
Global
Coverage
< 2.5%
Avg. Fee
05
Security & Compliance Layer
Proactive monitoring, transaction simulation, and risk scoring for every card spend. Our systems enforce AML/KYC policies at the smart contract level and provide audit trails for regulators.
24/7
Monitoring
SOC 2
Framework
06
Scalable Relayer Infrastructure
High-availability bundler and paymaster nodes with 99.9% uptime SLA. We ensure fast transaction inclusion, handle network congestion, and provide detailed analytics on user operations.
99.9%
Uptime SLA
Multi-cloud
Deployment
benefits
DELIVERABLES
Business Outcomes for Your Payment Product
We deliver a production-ready, secure wallet-card fusion infrastructure that accelerates your time-to-market and reduces operational overhead.
01
Reduced Friction & Higher Conversion
Enable one-click, gasless transactions for end-users. Remove the complexity of seed phrases and gas fees, directly increasing user adoption and transaction completion rates.
> 90%
Reduced Drop-off
< 1 sec
Transaction UX
02
Enterprise-Grade Security & Compliance
Deploy with audited smart account (ERC-4337) infrastructure, MPC-based key management, and configurable transaction policies. Built on OpenZeppelin standards with formal verification.
SOC 2 Type II
Compliance
24/7
Security Monitoring
03
Faster Time-to-Market
Leverage our pre-built, modular components for account abstraction, card issuance, and fiat on/off ramps. Go from concept to pilot in weeks, not months.
< 4 weeks
To Pilot
Pre-built
Modules
04
Scalable & Cost-Efficient Operations
Our managed infrastructure handles user onboarding, transaction bundling, and paymaster services, eliminating the need for in-house blockchain DevOps teams and reducing gas costs by up to 40%.
40%
Gas Savings
99.9%
Uptime SLA
Account Abstraction Wallet-Card Fusion
Structured Development Packages
Compare our tiered packages for developing and launching a secure, production-ready smart wallet with integrated card functionality.
| Feature | Starter | Professional | Enterprise |
|---|---|---|---|
ERC-4337 Smart Wallet Core | |||
Paymaster Integration (Gas Sponsorship) | |||
Custom Card Issuance Logic | Basic | Advanced | Custom |
Multi-Chain Deployment | 1 Chain | Up to 3 Chains | Unlimited |
Security Audit (by Halborn/Quantstamp) | Basic Review | Full Audit + Report | Full Audit + Ongoing Reviews |
Deployment & Infrastructure Setup | |||
Compliance & KYC/AML Module | Basic Integration | Custom Workflow | |
24/7 Monitoring & Alerting | 7-Day Logs | Real-time + 90-Day Logs | |
Technical Support SLA | Email (72h) | Priority (24h) | Dedicated (4h) |
Implementation Timeline | 6-8 weeks | 8-12 weeks | Custom |
Starting Price | $25,000 | $75,000 | Custom |
how-we-deliver
PROVEN PROCESS
Our 4-Phase Development Methodology
A structured, transparent approach to delivering secure, production-ready Account Abstraction infrastructure. We de-risk your project with clear milestones, expert execution, and guaranteed outcomes.
01
Phase 1: Architecture & Design
We define your wallet's core architecture, including smart account logic, key management, and gas sponsorship models. Deliverables include a technical specification, system diagrams, and a detailed project roadmap.
Client Value: A clear, actionable blueprint that aligns your business goals with technical feasibility, preventing costly rework.
1-2 weeks
Delivery Time
100%
Specification Lock
02
Phase 2: Core Smart Contract Development
Our senior Solidity engineers build your custom Account Factory, Paymaster, and EntryPoint integrations. All code follows OpenZeppelin standards and includes comprehensive unit/integration tests.
Client Value: Secure, auditable, and gas-optimized smart contracts that form the unbreakable foundation of your wallet stack.
ERC-4337
Standard
OpenZeppelin
Security Base
03
Phase 3: SDK & Integration
We develop a custom TypeScript/React SDK for seamless frontend integration, including transaction bundling, user operation signing, and session key management. Includes full documentation and example apps.
Client Value: Your engineering team gets plug-and-play tools to build the user experience, accelerating time-to-market by weeks.
TypeScript
Primary SDK
< 1 week
Integration Time
04
Phase 4: Deployment & Security Audit
We deploy your infrastructure to mainnet/testnet, configure monitoring/alerting, and facilitate a professional smart contract audit with our partner firms (e.g., Spearbit, Code4rena).
Client Value: A production-hardened system with verified security and operational readiness, ensuring user funds and project reputation are protected.
99.9%
Uptime SLA
Audit-Ready
Security Status
tech-stack
BUILT ON PROVEN STACKS
Protocols & Infrastructure We Integrate
We build your Account Abstraction wallet solution on battle-tested protocols and enterprise-grade infrastructure, ensuring security, scalability, and seamless interoperability from day one.
Account Abstraction Wallet-Card Fusion
Technical and Commercial FAQs
Get clear answers on timelines, costs, security, and technical details for integrating smart account-powered payment cards.
A standard deployment, including smart account architecture, card issuer integration, and a basic frontend, takes 2-4 weeks. Complex features like multi-chain gas sponsorship or custom compliance modules can extend this to 6-8 weeks. We provide a detailed project plan within 48 hours of scoping.
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