ASVSIWeb3 Studio
Blockchain DevelopmentSmart Contract SecurityPayments & Wallets

Ship secure Web3 products—faster.

I help startups and enterprises integrate wallets, accept crypto payments, deploy and optimize smart contracts, and pass pre-audit checks with confidence.

Trusted stack:wagmiRainbowKitHardhatFoundrySlitherEchidnaChainlink
Wallet Connect
Automated Testing
Deployment
Gas Optimization
Pre-Audit
Crypto Payments

Services

Everything you need to launch and scale secure Web3 products.

Wallet Connect + Interaction

Integrate RainbowKit/Wagmi with custom UX. Multi-wallet support, account handling, network switching, balance & NFT reads, and tx signing.

  • MetaMask, WalletConnect, Coinbase, more
  • Auto-reconnect, errors, network guard
  • Token & NFT display, custom hooks
Automated Testing & Security Reports

Static + dynamic analysis with Slither, Echidna, Mythril/Foundry. Severity-ranked issues, fixes, and gas reports.

  • CI-ready HTML/PDF reports
  • Coverage & invariant testing
  • Actionable remediation plan
Smart Contract Deployment & Verification

Hardhat/Foundry pipelines for multi-chain deploys with Etherscan/Polygonscan verification and env-safety.

  • Safe deploys & rollbacks
  • Multi-chain configs (ETH, Polygon, L2s)
  • Proxy/upgradeable support
Gas Optimization

Profiling + micro-optimizations: storage packing, unchecked math, calldata patterns, and loop refactors.

  • Foundry gas snapshots
  • Hardhat gas reporter
  • Before/after benchmarks
Crypto Payment Gateway Integration

Accept ETH/MATIC/USDT/USDC with third‑party APIs or custom on-chain processors with price oracles & escrow.

  • Chainlink price feeds
  • Multi-token, multi-chain
  • Webhooks & on-chain events
Oracles & Indexing

Chainlink/API3 or custom indexing with The Graph/Alchemy for real-time data and dashboards.

  • Price feeds & VRF
  • Subgraphs & webhooks
  • Analytics dashboards
DAO & Multisig Treasury

Governance contracts, proposal flows, and Gnosis Safe setups for secure ops.

  • Role-based access
  • Votes & timelocks
  • Treasury policies
Maintenance & Monitoring

Ongoing scans, dependency updates, alerting (EPNS), and hotfix deploys.

  • Monthly reports
  • Alerting & runbooks
  • SLA options

Pricing

Simple tiers. Custom quotes for complex builds.

Starter
$799

For MVPs and pilots

  • Wallet connect (1 chain)
  • Basic crypto payments (1 token)
  • Automated Slither report
  • Single-network deploy
Growth
Most Popular
$2,499

Scale confidently

  • Multi-wallet + custom UI
  • Payments: multi-token + escrow
  • Automated + manual pre-audit
  • Multi-chain deployments
  • Gas optimization pass
Enterprise
Custom

Security-first at scale

  • SOC-like monitoring & SLAs
  • Upgradeable architectures
  • Oracles + indexing + dashboards
  • Dedicated support & training

Case Studies

Selected results from audits, payments, and deployments.

Multi-wallet dApp
Integrated RainbowKit/Wagmi with custom guards and auto-reconnect. Reduced drop-off by 18% and support tickets by 40%.
NFT Dashboard
Indexed NFTs with The Graph; live balances and activity in 2 s . Pagination + caching for 10k+ items.

Process

Clear steps. Predictable outcomes.

1Discover
Goals, risks, and scope
2Design
Architecture & specs
3Build
Iterative sprints
4Secure & Ship
Audits, hardening, deploy

Tooling

Battle‑tested frameworks, libraries, and infra.

Solidity
Foundry
Hardhat
Slither
Echidna
Chainlink
The Graph
wagmi
RainbowKit
EPNS

FAQ

Answers to common questions.

Which chains do you support?
Ethereum, Polygon, BSC, Base, Arbitrum, Optimism, and testnets. Others on request.
What do I get in a pre-audit report?
A severity-ranked list of issues from Slither/Echidna/Mythril + manual review, remediation guidance, and a re-test.
How do crypto payments settle?
Either via trusted providers (Coinbase/NOWPayments) or custom contracts with price oracles and escrow.
Can you work with our in-house team?
Yes—code reviews, CI/CD, and shared runbooks are included in Growth/Enterprise tiers.

Let’s build.

Tell me about your project—get a roadmap and a quote in 24 hours.

Project Brief
WalletsPaymentsSmart ContractsSecurity
Why ASVSI?

Security-first workflows with automated + manual checks before anything hits mainnet.

Fast iterations, clean UX, and production-ready pipelines for multi-chain shipping.

Measurable outcomes: gas savings, fewer bugs, smoother onboarding, higher conversions.