We architect, develop, and audit custom Solidity/Rust smart contracts for DeFi, NFTs, and enterprise protocols. Our team follows formal verification practices and OpenZeppelin security patterns to eliminate vulnerabilities before deployment.
LABS
Services
Cross-Rollup Wallet Bridge API
An API-first service that abstracts the complexity of bridging and network switching across ZK and Optimistic rollups, delivering a seamless multi-chain wallet experience for your users.
Chainscore © 2026
overview
CORE SERVICE
Smart Contract Development
Secure, production-ready smart contracts built by engineers who have deployed over $1B+ in on-chain value.
- From 0 to 1: We deliver a fully audited MVP in 2-4 weeks, including token standards (
ERC-20,ERC-721,ERC-1155), staking pools, or custom DeFi logic. - Security First: Every contract undergoes internal review + third-party audit readiness. We provide a vulnerability assessment report with every delivery.
- Gas Optimization: We write efficient code that reduces user transaction costs by 15-40% versus industry averages.
key-features-cards
ENTERPRISE-GRADE INFRASTRUCTURE
Core API Capabilities
Our Cross-Rollup Wallet Bridge API delivers the robust, secure, and scalable connectivity layer required for production-grade applications. Each capability is engineered to reduce your development overhead and accelerate time-to-market.
01
Unified Wallet Abstraction
A single API endpoint to manage user assets and transactions across Arbitrum, Optimism, Base, and zkSync. Eliminates the need for developers to write and maintain separate integration logic for each rollup.
6+
Supported Rollups
1 API
Unified Interface
02
Gasless Transaction Relaying
Sponsor user transactions with configurable policies. Our meta-transaction infrastructure handles gas fee complexity, removing a major UX barrier for onboarding new users to your dApp.
0 Gwei
User Gas Cost
< 2s
Relay Latency
03
Real-Time Bridge Status & Tracking
Monitor cross-chain message passing and asset transfers in real-time with webhook notifications and detailed status APIs. Provides full visibility for users and your support team.
99.9%
Status Accuracy
24/7
Monitoring
04
Security & Compliance Layer
Built-in risk screening, rate limiting, and transaction simulation. Every cross-chain action is validated against our security policies before submission to the network.
Audited
Code & Infrastructure
0
Security Incidents
05
Automated Fee Optimization
Dynamic fee estimation and routing that selects the most cost-effective bridge path and L2 gas price moment. Reduces user costs by up to 40% compared to manual estimation.
~40%
Cost Reduction
Real-time
Fee Routing
benefits
TANGIBLE RESULTS
Business Outcomes for Your Product
Our Cross-Rollup Wallet Bridge API delivers measurable infrastructure improvements, directly impacting your product's performance and your team's velocity.
01
Accelerated Time-to-Market
Launch cross-chain features in weeks, not months. We provide a production-ready API with comprehensive documentation, eliminating the need for in-house bridge R&D.
< 2 weeks
Integration Time
0 lines
Bridge R&D
02
Enterprise-Grade Reliability
Maintain user trust with a 99.9% uptime SLA and sub-5-second finality for cross-rollup transactions. Our infrastructure is monitored 24/7 with automated failover.
99.9%
Uptime SLA
< 5 sec
Avg. Finality
03
Reduced Operational Overhead
Eliminate the cost and complexity of managing validator nodes, liquidity pools, and security audits for bridge infrastructure. We handle all backend operations.
$0
Node Opex
100%
Ops Offloaded
05
Future-Proof Scalability
Seamlessly support new L2s and rollups as they emerge. Our architecture abstracts away chain-specific complexity, ensuring your product stays ahead of ecosystem fragmentation.
10+
Supported Chains
Auto
New Chain Support
Cross-Rollup Wallet Bridge API
Build vs. Buy: The Infrastructure Trade-Off
A detailed comparison of the time, cost, and risk involved in developing a cross-rollup bridge in-house versus using Chainscore's production-ready API.
| Key Factor | Build In-House | Buy with Chainscore |
|---|---|---|
Time to Production | 6-12+ months | 2-4 weeks |
Initial Development Cost | $250K - $600K+ | From $25K |
Security Audit & Risk | High (custom, unaudited code) | Low (audited, battle-tested core) |
Ongoing Maintenance | Dedicated 3-5 person team | Fully managed service |
Supported Rollups & L2s | Limited to your team's expertise | Ethereum, Arbitrum, Optimism, Base, zkSync, Starknet, Scroll |
Developer Experience | Build SDK, docs, and tooling from scratch | Production-ready SDK, comprehensive docs, 24/7 support |
Time to First Transaction | Months of R&D | Minutes after API key generation |
Total Cost of Ownership (Year 1) | $500K - $1.2M+ | $50K - $200K |
how-we-deliver
PROVEN FRAMEWORK
Our Delivery Methodology
We deliver production-ready cross-rollup bridge APIs using a structured, security-first process that ensures reliability, speed, and seamless integration for your application.
01
Architecture & Design Review
We begin with a comprehensive analysis of your use case, token standards, and target rollups (Arbitrum, Optimism, zkSync, etc.) to design a secure, gas-optimized bridge architecture.
3-5 days
Design Phase
100%
Custom Architecture
02
Secure Smart Contract Development
Our engineers write and test bridge contracts in Solidity/Vyper using OpenZeppelin libraries. Every contract undergoes static analysis and internal review before deployment.
OpenZeppelin
Security Standard
2-3 weeks
Core Dev Time
03
REST & SDK API Layer
We build the critical API layer that abstracts bridge complexity. Includes endpoints for balance checks, transaction initiation, status polling, and event listening with full TypeScript/Go SDKs.
< 100ms
API Latency
Full SDK
TypeScript & Go
05
Staged Deployment & Monitoring
We deploy to testnet, run a bug bounty program, and then execute a phased mainnet rollout. 24/7 monitoring with alerts for bridge health, liquidity, and security events is established.
4-6 weeks
Total Timeline
24/7
Monitoring SLA
security
CORE SERVICES
Smart Contract Development
Secure, production-ready smart contracts built by Web3 experts for your protocol.
We architect and deploy battle-tested smart contracts that form the foundation of your on-chain application. Our development process is built for security-first deployment and long-term maintainability.
Deliver a secure, auditable, and gas-optimized protocol in weeks, not months.
- Custom Logic: Tailored
Solidity/Rustcontracts for DeFi, NFTs, DAOs, and enterprise use cases. - Security by Design: Implementation of
OpenZeppelinstandards, formal verification, and comprehensive unit/integration testing. - Full Lifecycle: From architecture and development to deployment, verification, and ongoing upgrade management via
Proxypatterns. - Key Deliverables: Production-ready source code, technical documentation, and a deployment roadmap.
Cross-Rollup Wallet Bridge API
Frequently Asked Questions
Get specific answers about our API for seamless, secure asset transfers across rollups and L2s.
Typical integration takes 2-3 weeks from kickoff to production. For a standard EVM-based wallet or dApp, we provide a production-ready SDK and comprehensive documentation. The timeline includes setup, custom configuration for your target rollups (e.g., Arbitrum, Optimism, zkSync), security review, and a staged deployment to testnet and mainnet.
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