We architect and deploy custom smart contracts that form the foundation of your protocol. Our engineers, with backgrounds from top Web3 security firms, write in Solidity 0.8+ and Rust, adhering to OpenZeppelin standards and implementing gas-optimized patterns for mainnet readiness.
LABS
Services
StarkNet & zkSync Account Abstraction Multi-Sig
We build secure, scalable multi-signature wallets on StarkNet and zkSync Era. Leverage account abstraction for privacy-enhanced batch payments, social recovery, and enterprise-grade L2 transaction management.
Chainscore © 2026
overview
CORE SERVICE
Smart Contract Development
Secure, production-ready smart contracts built by engineers who have audited over 1 million lines of code.
- End-to-End Development: From initial design and
Foundry/Hardhattesting to deployment and verification onEVM/Solana/Starknet. - Security-First Process: Every contract undergoes internal review against known attack vectors before we recommend third-party audits.
- Measurable Outcomes: Achieve >95% test coverage, gas costs reduced by 15-40%, and a clear path from MVP to mainnet in as little as 3 weeks.
key-features-cards
ENTERPRISE-GRADE AA MULTI-SIG
Core Technical Capabilities We Implement
We build secure, scalable multi-signature smart accounts on StarkNet and zkSync, delivering production-ready infrastructure with audited security and measurable performance.
01
Custom Multi-Sig Smart Account Development
We architect and deploy bespoke multi-signature smart accounts using Cairo (StarkNet) and Solidity/Vyper (zkSync). Our modular design supports configurable signing thresholds, role-based permissions, and upgradability via transparent proxies.
ERC-4337 & native
Standards
OpenZeppelin
Security Patterns
02
Gas Abstraction & Sponsorship Systems
Implement gasless transaction flows and flexible sponsorship models. We enable paymasters for user onboarding and allow enterprises to define custom gas payment rules, significantly reducing user friction.
0 gas for users
Onboarding
< 0.01 ETH
Avg. Sponsor Cost
03
Batch Transaction Execution
Bundle multiple operations (transfers, swaps, approvals) into a single user transaction. This reduces gas costs by up to 40% and simplifies complex DeFi interactions for your end-users.
Up to 40%
Gas Savings
Atomic execution
Guarantee
05
Cross-Chain AA Wallet Infrastructure
Build unified account abstraction layers that operate across StarkNet and zkSync ecosystems. We implement secure bridging logic and state synchronization for seamless multi-chain user experiences.
StarkNet & zkSync
Supported L2s
LayerZero & Axelar
Bridge Protocols
06
Integration & Developer Tooling
We provide comprehensive SDKs, admin dashboards for key management, and real-time monitoring. Our tooling integrates seamlessly with existing backends and frontends (React/Next.js), accelerating your time-to-market.
< 2 weeks
Integration Time
Full API & SDK
Deliverables
benefits
DELIVERABLES
Business Outcomes for Your Team
Our StarkNet & zkSync Account Abstraction Multi-Sig service delivers concrete results that accelerate your product roadmap and secure your assets.
01
Secure Multi-Sig Wallet Deployment
Production-ready, audited multi-signature smart accounts deployed on StarkNet or zkSync Era. We implement best practices like social recovery, session keys, and role-based permissions to protect your treasury and operational funds.
100%
Audit Coverage
< 72 hrs
Deployment Time
02
Gas Fee Abstraction & Sponsorship
Implement gasless transactions for your users with customizable sponsorship logic. We build paymasters that allow you to subsidize, discount, or bill in ERC-20 tokens, removing a major UX barrier for mainstream adoption.
90%+
User Onboarding Uptick
Paymaster
Architecture
03
Batch Transaction Execution
Enable complex, multi-step DeFi operations (e.g., swap, bridge, stake) to be executed as a single, atomic transaction. This reduces failed states, improves UX, and optimizes gas costs for power users.
40-60%
Gas Savings
Atomic
Execution
04
Developer SDK & Integration
Receive a custom TypeScript/Python SDK and comprehensive documentation for seamless integration with your existing frontend and backend. We ensure your team can manage wallets, signers, and policies post-handover.
Full SDK
Delivery
2-4 weeks
Integration Support
05
Compliance & Audit Trail
Built-in event logging and off-chain indexing for all multi-sig actions. Provides a transparent, immutable record for internal governance, regulatory requirements, and security monitoring.
Immutable
Logs
Real-time
Monitoring
06
Ongoing Security & Upgrades
Post-deployment support including monitoring, incident response playbooks, and upgrade paths for new AA standards (ERC-4337, ERC-6900). We ensure your infrastructure evolves with the ecosystem.
24/7
Monitoring
SLA
Response Time
Choose Your Path to Production
Structured Development Tiers
Compare our service packages for StarkNet & zkSync Account Abstraction Multi-Sig development, from initial build to enterprise-grade deployment.
| Feature / Deliverable | Starter | Professional | Enterprise |
|---|---|---|---|
Custom Multi-Sig Smart Contracts | |||
StarkNet (Cairo) / zkSync (Solidity Vyper) Development | |||
Security Audit & Formal Verification | Basic Review | Full Audit Report | Audit + Bug Bounty Setup |
Gas Optimization Analysis | |||
Deployment & Mainnet Launch Support | |||
Post-Deployment Monitoring & Alerting | 7 days | 30 days | 12 months |
SLA for Critical Issue Response | Best Effort | < 24 hours | < 4 hours |
Integration Support (Wallets, dApps, APIs) | |||
Team Knowledge Transfer & Documentation | |||
Estimated Timeline | 3-4 weeks | 6-8 weeks | 8-12+ weeks |
Starting Project Investment | $25,000 | $75,000 | Custom Quote |
how-we-deliver
PROVEN METHODOLOGY
Our Development & Security Process
We deliver secure, production-ready multi-sig smart accounts on StarkNet and zkSync with a rigorous, multi-stage process designed for enterprise-grade reliability.
01
Architecture & Specification
We begin with a deep technical design session to define your multi-sig logic, signer roles, recovery flows, and gas optimization strategy for StarkNet (Cairo) or zkSync (Vyper/Solidity).
1-3 days
Design Sprint
100%
Requirement Clarity
02
Smart Contract Development
Our engineers write clean, auditable code using Cairo 1.0 for StarkNet or Solidity/Vyper for zkSync, implementing OpenZeppelin patterns and custom logic for your specific governance model.
2-4 weeks
Core Build Time
Zero
Critical Bugs Shipped
03
Comprehensive Security Audit
Every contract undergoes internal review followed by a formal audit. We provide a detailed report covering access control, reentrancy, and protocol-specific vulnerabilities before mainnet deployment.
100%
Audit Coverage
< 7 days
Remediation SLA
04
Testnet Deployment & Simulation
We deploy to Sepolia/Goerli testnets and conduct extensive simulation of multi-sig operations, failure scenarios, and gas usage to ensure robustness before your users interact.
200+
Test Cases
99.9%
Simulation Accuracy
05
Mainnet Launch & Monitoring
We handle the secure mainnet deployment on StarkNet or zkSync, configure real-time monitoring with alerting for suspicious activity, and provide post-launch support.
< 1 day
Deployment Window
24/7
Incident Monitoring
06
Documentation & Handoff
You receive complete technical documentation, admin guides for managing signers, and integration snippets for your frontend, ensuring your team has full ownership and operational knowledge.
100%
Code Ownership
O(1)
Integration Time
Account Abstraction Multi-Sig
Frequently Asked Questions
Get clear answers on our process, security, and delivery for StarkNet & zkSync multi-signature wallet development.
Standard deployments take 2-4 weeks from kickoff to mainnet launch. This includes smart contract development, integration with your dApp, and security review. Complex requirements like custom signature schemes or multi-chain logic can extend this to 6-8 weeks. We provide a detailed project plan within the first 3 days of engagement.
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