Smart contracts
Solidity, audited, gas-optimised, upgradeable patterns (UUPS / Transparent / Diamond) with EIP-712 signatures.
Service · Web3
Blockchain Development with auditable
security.
Smart contracts, wallets, NFT marketplaces and DeFi protocols — engineered with tests, formal review and an audit-ready paper trail.
Typical timeline: 10 – 24 weeks. Engagement: fixed scope, with optional third-party audit.
contracts.smartdesizns.com · mainnet
Deploy · GenesisPass.sol
Verified
Contract
0x4a72…8c1b
Chain
Base Mainnet
Solc
0.8.24 · viaIR
Pattern
UUPS Upgradeable
Gas est.
0.0021 ETH
~$5.20 · cheap
Tx volume 24h
8,412
+18% wow
Audit checks
8 / 8 passed
- Slither · 0 findings
- Mythril · clean
- Echidna · invariants hold
Token standards
ERC-20
ERC-721
ERC-1155
ERC-2981
EIP-712
Mint progress
3,284
/ 10,000
33% sold · floor 0.08 ETH
Last tx
MINT
0xab12…
12s ago
TRANSFER
0xcd34…
48s ago
ROYALTY
0xef56…
2m ago
Web3 DNA
Audit-ready
Gas-optimised contracts
-30 to -60%
Unchecked math (safe), assembly hot-paths, EIP-1167 minimal proxies.
Real-time indexing
<2s lag
The Graph subgraphs, Substreams or Goldsky. Reorg-safe.
Multi-chain by design
L1 · L2 · zkEVM
Ethereum, Optimism, Arbitrum, Base, Polygon. One source of truth.
Coverage
90%+
Audits
3rd-party
Bounty
Immunefi
What we ship in Web3
Four pillars under every dApp we deploy.
dApps & wallets
React + wagmi + viem + RainbowKit, embedded wallets, social login — one connect button, every chain.
Indexing & analytics
The Graph, Goldsky, custom RPC mirrors and Dune queries — with backfill, reorgs handled and uptime SLA.
Security
Audits, formal verification, bug-bounty integration (Immunefi) and post-mortem playbooks — assume breach, plan response.
What you get
On-chain code is forever. We treat it that way.
Every contract ships with 90%+ test coverage, Slither / Mythril runs, fuzzing and a deployment runbook.
Smart contracts
Solidity contracts for tokens, marketplaces, vaults, staking and governance — with reentrancy and overflow checks.
Wallets & integrations
WalletConnect, MetaMask, Rainbow, social-login (smart wallets) and embedded wallet flows.
Audits & fuzzing
Slither, Mythril, Echidna, Foundry invariants and external audit prep with a structured remediation log.
Indexers & subgraphs
The Graph, Goldsky or custom Postgres indexers for fast, structured on-chain data queries.
Frontends
Wagmi, Viem, Ethers and modern React UIs — with transaction states, gas estimation and error recovery.
NFT & DeFi platforms
Mint engines, royalty splits, AMMs, staking and treasury — with admin tools your ops team can use.
How we work
Five phases. Weekly demos. No surprises.
A predictable path from brief to launch — with documented hand-offs at every milestone.
-
1
Discover
Goals, users, constraints, success metrics — locked in writing.
-
2
Design
User journeys, wireframes, hi-fi UI, prototype, design system.
-
3
Build
Sprint cadence, weekly demos, code review, automated tests.
-
4
Launch
Staging UAT, security review, CI/CD, monitored go-live.
-
5
Scale
SLA support, observability, feature roadmap, optimisation.
Transaction flow
From wallet connect to on-chain settlement.
A live dApp on top — the contracts and infra that make it boring underneath.
01
wallet_connect
WalletConnect v2, MetaMask, Coinbase and embedded social-login wallets — one JS API.
02
sign_tx
EIP-712 typed signatures with pre-flight simulation — users see exactly what they approve.
03
broadcast
Gas estimation, price negotiation and Flashbots Protect — MEV-aware submission avoids sandwich attacks.
04
confirm
Reorg-safe confirmation tracking — indexers reflect on-chain events in the UI in under 2 seconds.
05
settled
Etherscan-verified contracts, metadata on IPFS / Arweave and a permanent, auditable settlement record.
Tech we use
A modern EVM stack, with safety first.
We default to audited libraries and battle-tested patterns — not novelty.
Solidity
Hardhat
Foundry
Ethers
Viem
Wagmi
OpenZeppelin
The Graph
IPFS
Pinata
MetaMask
WalletConnect
Polygon
Arbitrum
Optimism
Base
Slither
Mythril
Echidna
FAQ
Common questions, answered.
Do you arrange external audits?
Yes. We prepare the contracts, documentation and tests, then coordinate with audit firms like OpenZeppelin, Trail of Bits, ConsenSys Diligence or Halborn. Audit fees are paid directly to the firm.
Which chain should we deploy on?
For most consumer apps, an L2 (Base, Arbitrum, Polygon) gives you Ethereum security with sub-cent gas. We help you pick based on user base, ecosystem and bridge UX.
Can you build a hybrid on-chain + off-chain product?
Yes — most production apps are hybrid. Critical state on-chain, everything else (auth, search, content, analytics) in a normal backend. We design the boundary carefully.
How do you handle private keys for ops?
Hardware wallets for owner keys, multisig (Safe) for treasury and admin actions, KMS-backed signers for automated ops, and a written key recovery procedure.
What about regulatory risk?
We work with your legal counsel from day one — product structure, KYC requirements, jurisdiction analysis and licensing all feed into architecture before code is written.
Track record
Numbers we stand behind.
Experience
0
years shipping since 2011
In production
0
products live in production
Offices
0
offices — India & USA
Ready to start?
Tell us about the project. We will reply within one business day with a proposal and timeline.