We architect and deploy custom smart contracts for DeFi, NFTs, DAOs, and enterprise applications. Our code is built on Solidity 0.8+ with OpenZeppelin security patterns and undergoes rigorous internal audits before delivery.
LABS
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Interoperable Payment Smart Contract Library
A secure, production-ready library of audited smart contracts for building custom cross-chain payment systems on protocols like XCM, IBC, and Wormhole. Accelerate your time-to-market.
Chainscore © 2026
overview
CORE ENGINEERING
Smart Contract Development
Secure, production-ready smart contracts built to your exact specifications.
Deliver a secure, auditable, and gas-optimized foundation for your Web3 product in 2-4 weeks.
- Token Standards:
ERC-20,ERC-721,ERC-1155, and custom implementations. - DeFi Primitives: Automated Market Makers (AMMs), staking pools, yield aggregators.
- Security First: Formal verification, comprehensive test suites, and audit preparation packages.
key-features-cards
ENGINEERED FOR SCALE
A Modular, Protocol-Agnostic Foundation
Our library provides a future-proof core for payment systems, decoupling business logic from underlying protocols to ensure long-term adaptability and reduced technical debt.
01
Multi-Chain Payment Abstraction
Deploy payment logic once and connect to EVM, Solana, or Cosmos SDK chains via a unified interface. Eliminate the need for separate codebases per blockchain.
10+
Supported Chains
90%
Code Reuse
02
Audited Security Primitives
Pre-built, formally verified modules for escrow, recurring billing, and multi-signature wallets. Built on OpenZeppelin with zero critical vulnerabilities in audits.
0
Critical Bugs
100%
Test Coverage
03
Gas-Optimized Core Logic
Payment settlement and fee calculation modules engineered for minimal gas consumption, reducing end-user transaction costs by up to 40% versus custom implementations.
40%
Avg. Gas Savings
< 100k
Base Gas
04
Standard-Compliant Interfaces
Implements ERC-20, ERC-777, and emerging token standards out-of-the-box, ensuring compatibility with major wallets, DEXs, and DeFi protocols.
15+
ERC Standards
100%
EIP Compliance
05
Upgradeable Architecture
Modular design with proxy patterns allows for seamless, secure upgrades to payment logic without migrating user funds or breaking integrations.
0
Migration Downtime
< 1 hr
Safe Upgrade Time
benefits
ENTERPRISE-GRADE INFRASTRUCTURE
Why FinTechs Choose Our Payment Library
Our battle-tested smart contract library provides the secure, scalable foundation for next-generation payment rails. Built for production from day one.
05
Enterprise-Grade Support
Get direct access to our engineering team with 99.9% SLA on response times. We provide white-glove integration support and 24/7 monitoring.
99.9%
Uptime SLA
< 15 min
Critical Response
06
Proven in Production
Our library processes $500M+ in monthly transaction volume for live fintech applications. You deploy with confidence on a proven system.
$500M+
Monthly Volume
100K+
Daily Users
Why our Interoperable Payment Library is the strategic choice
Build vs. Buy: The Time & Risk Trade-off
Compare the total cost of ownership and risk profile of developing a cross-chain payment system from scratch versus leveraging our battle-tested, audited library.
| Factor | Build In-House | Chainscore Library |
|---|---|---|
Time to Initial Deployment | 6-12 months | 4-8 weeks |
Upfront Development Cost | $150K - $400K+ | $25K - $75K |
Security Audit Requirement | High Risk (Unaudited) | Low Risk (Pre-Audited by Spearbit) |
Cross-Chain Protocol Coverage | Limited (1-2 chains) | Comprehensive (EVM, Solana, Cosmos SDK) |
Ongoing Maintenance & Upgrades | Full-time 2-3 engineers | Optional SLA from $15K/year |
Integration Complexity | High (Bridge APIs, Oracles) | Low (Single SDK Interface) |
Time to Add New Chain | 3-6 months per chain | 2-4 weeks per chain |
Total Cost of Ownership (Year 1) | $200K - $500K+ | $50K - $150K |
how-we-deliver
PREDICTABLE DELIVERY
Our Delivery Process: From Audit to Integration
A structured, transparent workflow designed for technical leaders. We deliver a production-ready, interoperable payment library with clear milestones, from initial security review to final deployment support.
01
1. Architecture & Security Audit
We begin with a comprehensive review of your existing payment logic and target chains. Our team identifies security vulnerabilities and architectural bottlenecks, delivering a formal audit report with prioritized recommendations.
100%
Code Coverage Audit
< 72 hrs
Initial Report
02
2. Library Customization & Development
Our engineers extend our core payment library with your specific business logic—supporting cross-chain swaps, subscription billing, or escrow. Built with Solidity 0.8+ and OpenZeppelin standards.
ERC-20/721/1155
Standards Supported
2-4 weeks
Typical Timeline
03
3. Rigorous Testing & Simulation
Every module undergoes unit, integration, and fork-testing on live testnets. We simulate mainnet conditions, including gas spikes and congestion, to ensure reliability under load.
> 95%
Branch Coverage
5+ Testnets
Deployed & Verified
04
4. Final Security Review & Sign-off
Before delivery, the finalized library undergoes a final internal audit against the initial report. You receive a completion certificate and all artifacts: source code, audit trails, and deployment scripts.
Zero Critical
Issues at Sign-off
Full Artifacts
Delivered
05
5. Deployment & Integration Support
We provide hands-on support for deploying to your mainnet environments (Ethereum, Polygon, Arbitrum, etc.) and integrate the library with your existing front-end and backend systems.
24/7
Go-Live Support
< 1 week
Integration Window
06
6. Ongoing Maintenance & Updates
Receive proactive updates for protocol upgrades (EIPs) and security patches. Optional SLA includes monitoring, incident response, and quarterly performance reviews.
99.9%
Uptime SLA Option
48-hr
Patch Response
Technical & Commercial FAQs
Common Questions About Our Payment Library
Get clear, specific answers to the most common questions from CTOs and product leads evaluating our Interoperable Payment Smart Contract Library.
Typical integration takes 2-4 weeks from kickoff to mainnet deployment. For a standard EVM-based project, we deliver the audited library and integration guide in week 1, complete your team's technical onboarding in week 2, and support testnet deployment and final security review in weeks 3-4. Complex multi-chain deployments may extend to 6-8 weeks.
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