We architect and deploy custom smart contracts that form the backbone of your Web3 application. Our development process is built on security-first principles and a deep understanding of tokenomics and protocol design.
LABS
Services
Cross-Chain Wallet SDK Creation
We build and maintain custom SDKs that abstract the complexity of multiple bridge protocols, giving your wallet a single, unified API for cross-chain functionality.
Chainscore © 2026
overview
CORE SERVICE
Smart Contract Development
Secure, production-ready smart contracts built for scale and compliance.
- End-to-End Development: From initial design and
Solidity/Rustcoding to deployment and mainnet launch onEVMorSolana. - Security & Audits: Rigorous testing, formal verification, and integration with top audit firms to ensure zero critical vulnerabilities.
- Standard & Custom Logic: Implementation of
ERC-20,ERC-721,ERC-1155standards or bespoke logic for DeFi, NFTs, and DAOs.
We deliver battle-tested contracts that reduce time-to-market by weeks and provide a foundation you can trust for millions in TVL.
key-features-cards
BUILT FOR SCALE
Core SDK Capabilities
Our Cross-Chain Wallet SDK is engineered for production, providing the foundational tools to launch and scale a secure, multi-chain wallet experience in weeks, not months.
01
Unified Multi-Chain Interface
A single, consistent API for EVM, Solana, Cosmos, and Bitcoin-based chains. Eliminate the complexity of managing disparate RPC providers and transaction formats.
25+
Chains Supported
1 API
Unified Interface
02
Enterprise-Grade Security
Built with MPC (Multi-Party Computation) and AA (Account Abstraction) patterns. Private keys are never stored in full, reducing single points of failure. Undergoes regular third-party audits.
SOC 2
Compliance
MPC/AA
Core Architecture
03
Gas Optimization Engine
Intelligent fee estimation and transaction batching across networks. Dynamically routes transactions to minimize costs and prevent failures due to gas spikes.
Up to 40%
Cost Reduction
< 2 sec
Fee Estimation
04
Real-Time State Synchronization
WebSocket-based listeners and indexed data feeds for balances, token holdings, and transaction status across all integrated chains. Ensures UI consistency with on-chain state.
99.9%
Data Accuracy SLA
< 1 sec
Update Latency
05
Compliance & Monitoring Suite
Integrated tools for address screening (OFAC), transaction monitoring, and customizable risk rules. Generate audit trails for regulatory requirements.
Real-time
Sanctions Screening
Custom Rules
Risk Engine
benefits
TECHNICAL EXCELLENCE
Why Build Your Cross-Chain SDK with Us
We deliver production-ready, secure, and scalable SDKs that abstract away the complexity of cross-chain interoperability, letting you focus on your core product.
01
Battle-Tested Security
Our SDKs are built on audited, open-source libraries like Axelar GMP and Wormhole. Every deployment includes a dedicated security review and follows OpenZeppelin standards.
0
Critical Vulnerabilities
100%
Open-Source Core
02
Multi-Chain Native Architecture
Go beyond simple bridging. We build SDKs with native support for EVM, Solana, Cosmos, and non-EVM L2s, enabling seamless asset and data transfer across 30+ chains.
30+
Supported Chains
< 5 sec
Avg. Finality
03
Developer Experience First
Get a fully documented TypeScript/JavaScript SDK with intuitive APIs, comprehensive test suites, and CLI tools. We handle gas estimation, error handling, and state management.
< 10
Lines to Integrate
24h
Support SLA
04
Proven at Scale
Our SDKs power applications processing billions in TVL. We design for high throughput and low latency, with built-in monitoring, alerting, and automatic failover.
$10B+
Processed Volume
99.95%
Uptime SLA
The Infrastructure Decision Matrix
Build vs. Buy vs. Our Cross-Chain Wallet SDK
Choosing the right path for your cross-chain wallet infrastructure impacts your time-to-market, security posture, and total cost of ownership. Compare the key factors.
| Key Factor | Build In-House | Generic Third-Party SDK | Chainscore SDK Service |
|---|---|---|---|
Time to First Integration | 6-12 months | 2-4 months | 2-4 weeks |
Initial Development Cost | $250K-$750K+ | $0-$50K (licensing) | $30K-$100K (project) |
Multi-Chain Support (EVM, non-EVM, L2s) | Custom per chain | Limited (often EVM-only) | Ethereum, Polygon, Arbitrum, Optimism, Base, Solana, Cosmos, NEAR |
Security & Audit Burden | Your responsibility (high risk) | Shared risk (opaque code) | Fully audited; we assume liability |
Gas Optimization & Fee Management | Build from scratch | Basic abstractions | Advanced batching, sponsorship, and fee estimation |
Key Management (MPC, AA, Social) | Requires specialized team | Often vendor-locked or basic | Flexible integration of MPC, AA wallets, and Web3Auth |
Ongoing Maintenance & Upgrades | Full-time team required | Dependent on vendor roadmap | Included with optional SLA (99.9% uptime) |
Custom Feature Development | Full control, slow iteration | Limited or impossible | Priority development & white-label support |
Total Cost of Ownership (Year 1) | $500K-$1.5M+ | $100K-$300K+ | $80K-$200K |
how-we-deliver
PROVEN METHODOLOGY
Our Development & Maintenance Process
A structured, transparent approach to building and sustaining secure, scalable cross-chain wallet SDKs. We focus on delivering production-ready code and long-term reliability.
01
Architecture & Protocol Design
We design your SDK's core architecture, selecting optimal protocols (EVM, Solana, Cosmos SDK) and security patterns. This phase establishes a scalable foundation for multi-chain operations.
10+
Supported Chains
2-3 weeks
Design Phase
02
Secure Core Development
Implementation of key management, transaction signing, and cross-chain messaging using battle-tested libraries (ethers.js, web3.js, Solana Web3). All code follows OpenZeppelin security practices.
100%
Code Review
OZ Patterns
Security Standard
03
Rigorous Testing & Auditing
Comprehensive unit, integration, and end-to-end testing across all target networks. Optional formal security audit preparation and coordination with leading firms like CertiK or Quantstamp.
>95%
Test Coverage
Audit-Ready
Deliverable
04
Deployment & Integration Support
We handle SDK packaging (npm, Swift Package Manager, Gradle) and provide dedicated support for integration into your mobile or web application, ensuring a smooth developer experience.
< 1 week
Avg. Integration
Full Docs
Included
05
Proactive Maintenance & Updates
Continuous monitoring, dependency updates, and protocol upgrade support (e.g., hard forks, new token standards). We ensure your SDK remains compatible and secure.
24/7
Monitoring
SLA-Backed
Response
Structured Delivery for Fast Integration
Typical 8-Week Cross-Chain Wallet SDK Development Timeline
A phased roadmap detailing key deliverables and milestones for a production-ready, multi-chain wallet SDK, from initial architecture to final deployment.
| Week | Phase | Key Deliverables | Client Involvement |
|---|---|---|---|
Weeks 1-2 | Discovery & Architecture | Technical spec, chain selection, key management design | Requirements workshop, architecture sign-off |
Weeks 3-4 | Core SDK Development | Wallet creation/import, balance/portfolio view, non-custodial logic | Bi-weekly demos, feedback on core flows |
Weeks 5-6 | Transaction & Multi-Chain Layer | Unified transaction builder, EVM & non-EVM chain support, gas estimation | Chain priority confirmation, transaction flow review |
Weeks 7-8 | Integration & Security | React Native/Web wrapper, security audit report, comprehensive documentation | Integration testing, security review, final acceptance |
Technical & Commercial Details
Cross-Chain Wallet SDK FAQ
Answers to common questions from CTOs and product leads evaluating our SDK development services.
We deliver a minimum viable SDK in 3-4 weeks, with full production deployment in 6-8 weeks for a standard multi-chain wallet. This includes core features like key management, transaction signing, and support for 3-5 target blockchains. Complex integrations (e.g., account abstraction, MPC) or support for 10+ chains extend the timeline, which we define in a fixed-scope proposal.
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