Smart contracts written to be tested, verified and trusted.
BitAzure writes, tests and deploys smart contracts for Ethereum, EVM networks and Solana: token standards, staking and vesting logic, governance, multisig and upgradeable architectures, delivered through a pipeline of unit, fuzz and static analysis with third-party audit coordination.
- Solidity, Rust (Solana, Anchor) and Move
- ERC-20, ERC-721, ERC-1155, BEP-20 and SPL tokens
- Staking, vesting, governance and multisig contracts
- Fuzz, invariant and static analysis before testnet
What is smart contract development?
Smart contract development is the design, implementation, testing and deployment of programs that execute on a blockchain, holding assets and enforcing rules without an intermediary once they are deployed.
Because deployed code is public, immutable by default and directly attached to value, the engineering discipline differs from ordinary software: specifications are written as invariants, tests include fuzzing and property checks, dependencies are pinned and reviewed, and deployment uses staged environments, proxies and timelocks so that changes stay controlled.
BitAzure builds contracts in Solidity for EVM networks, Rust for Solana and other Rust-based runtimes, and Move where a project targets Move-based chains. Every engagement includes the test suites, deployment scripts and documentation an independent auditor needs to review the code efficiently.
Smart contract development services
Every contract we deliver goes through the same pipeline of specification, testing, analysis and staged deployment, regardless of size.
Languages & Runtimes
- Solidity for EVM networks with Foundry and Hardhat toolchains
- Rust programs for Solana using Anchor and the native runtime
- Move modules for Move-based chains where a project requires them
- Vyper and Yul for gas-critical components
- Assembly-level optimisation where profiling justifies it
Networks
- Ethereum mainnet and Layer 2s: Arbitrum, Optimism and Base
- BNB Chain, Polygon and Avalanche deployments
- Solana programs and SPL token integrations
- Multi-chain deployment with deterministic addresses
- Testnet environments per network for staging
Token Contracts
- ERC-20 and BEP-20 fungible tokens with permit, votes and pausable extensions
- ERC-721 and ERC-1155 NFT contracts with royalties and metadata standards
- SPL tokens and token extensions on Solana
- Mint, burn, cap and role-based supply controls
- Transfer restriction and compliance hooks
Protocol Components
- Staking contracts with reward schedules and lockups
- Vesting contracts with cliffs, linear release and revocation
- Governance: governor, vote escrow and timelock
- Multisig wallets and role-based access control
- Upgradeable contracts with transparent or UUPS proxies and storage layout checks
- Escrow, payment splitting and streaming contracts
Testing & Analysis
- Unit testing with branch coverage tracked in CI
- Integration testing against forked mainnet state
- Fuzz testing and invariant testing with Foundry and Echidna
- Static analysis with Slither and custom Semgrep rules
- Gas profiling and regression benchmarks
Deployment & Assurance
- Testnet deployment with scripted, reproducible migrations
- Third-party audit coordination: scoping, documentation and remediation
- Mainnet deployment behind timelocks and multisig ownership
- Source verification and public documentation
- Post-deployment monitoring and incident support
Smart contract delivery pipeline
Rather than a runtime topology, the reference diagram shows the pipeline every contract passes through: from specification and invariants, through automated testing and analysis, to testnet, external review and a governed mainnet deployment.
Hover or focus a component to see its role in the architecture.
- Specification (Threat model · invariants): Functional behaviour, roles, invariants and attacker scenarios written before code.
- Contract Code (Solidity · Rust · Move): Implementation against the specification with pinned, reviewed dependencies.
- Unit & Integration Tests (Foundry · Hardhat · Anchor): Function-level tests and fork-based integration tests with coverage enforced in CI.
- Fuzz & Invariant Tests (Stateful fuzzing): Random call sequences check that accounting and access invariants always hold.
- Static Analysis (Slither · custom rules): Automated detectors and project-specific rules run on every commit.
- Testnet Deployment (Scripted migrations): Reproducible deployment to public testnets for end-to-end validation.
- Audit Coordination (Third-party review): Scoping, documentation and remediation with an independent auditor when required.
- Mainnet Deployment (Proxy · timelock · multisig): Governed deployment with ownership transferred to multisig and timelocked admin functions.
- Monitoring (Events · alerts): Event indexing, anomaly alerts and incident runbooks after launch.
Specification
- Functional spec
- Threat model
- Invariants
Verification
- Unit & integration tests
- Fuzz & invariant tests
- Static analysis
Review
- Internal review
- Testnet staging
- Audit coordination
Deployment
- Proxy & timelock
- Multisig ownership
- Monitoring
Contracts we build
Token launches
Fungible tokens with vesting, allocation and distribution contracts.
NFT collections and marketplaces
Minting, royalties, lazy minting and marketplace settlement.
Staking and rewards
Reward distribution with lockups, boosts and emission schedules.
DAO governance
Proposal, voting and timelocked execution for protocol control.
Escrow and settlement
Conditional payments, milestone escrow and revenue splitting.
Protocol upgrades
Migrating legacy contracts to upgradeable, reviewed architectures.
Why teams choose BitAzure for smart contracts
Specification-driven
Invariants written first become the tests and the audit brief.
Deep test coverage
Unit, integration, fuzz and invariant suites run on every commit.
Multi-language
Solidity, Rust and Move by engineers who work in each of them daily.
Audit-ready delivery
Documentation, threat model and clean diffs that reduce auditor time.
Gas discipline
Profiling and benchmarks keep transaction costs predictable.
Governed deployment
Timelocks, multisig ownership and rehearsed upgrade procedures.
Technologies we use for smart contract development
Solidity
BlockchainEVM smart contracts: tokens, DeFi protocols, governance, vesting.
Rust
BackendMemory-safe, low-latency engines, on-chain programs and tooling.
Foundry / Hardhat
BlockchainTesting, fuzzing, gas profiling and deployment pipelines.
EVM
BlockchainEthereum, BNB Chain, Polygon, Arbitrum, Optimism, Base, Avalanche.
Ethereum
BlockchainMainnet and L2 deployments, account abstraction, indexing.
Solana
BlockchainRust programs with Anchor, SPL tokens and high-throughput dApps.
Arbitrum
Base
Polygon
TypeScript
FrontendStrict typing across the entire stack, client to contracts tooling.
Node.js
BackendEvent-driven APIs, gateways and real-time WebSocket services.
Docker
InfrastructureReproducible builds and images across every environment.
How we deliver smart contracts
Every engagement follows a documented, milestone-driven path from discovery to continuous development.
- 01
Specification & threat model
Behaviour, roles, invariants and attacker scenarios are written down and agreed.
- 02
Architecture & standards
Contract layout, inheritance, upgrade strategy and applicable standards are chosen.
- 03
Implementation with tests
Contracts are written alongside unit and integration tests, with coverage enforced in CI.
- 04
Fuzzing & static analysis
Invariant fuzzing, static analysers and manual review catch what unit tests miss.
- 05
Testnet & audit coordination
Staged deployment on testnets, then scoping and support for an independent audit when required.
- 06
Mainnet deployment & monitoring
Scripted deployment behind timelocks, source verification and event monitoring.
Security practices in smart contract development
Threat modelling
Roles, privileges and attacker capabilities are mapped before the first line of code.
Invariant fuzzing
Stateful fuzzing checks that accounting and access invariants hold under random sequences.
Static analysis
Automated analysers and custom rules run in CI on every change.
Dependency control
Pinned, reviewed libraries and reproducible builds.
Upgrade safety
Storage layout checks, initialiser guards and timelocked upgrades.
Honest audit status
We coordinate third-party audits and never describe code as audited unless an external audit has actually been completed.
We coordinate independent third-party audits on request and never claim an audit, certification or compliance status unless it has actually been obtained.
What to decide before writing contracts
Immutable versus upgradeable
Upgradeability adds flexibility and a trusted admin; immutability adds trust and removes the fix path.
Standard versus custom
Standard implementations are well understood by auditors and integrators; customisation should be minimal and justified.
Gas and chain fit
Logic that is affordable on a Layer 2 may be unusable on mainnet.
Access control design
Owner keys are the most common compromise vector; use multisig and role separation from the start.
Audit budget and timing
Independent audits take weeks and should be scheduled before the launch date is fixed.
Post-launch ownership
Monitoring, key custody and upgrade procedures need a named owner after delivery.
Smart Contract Development questions
Solidity for Ethereum, BNB Chain, Polygon, Arbitrum, Optimism, Base and Avalanche; Rust for Solana; and Move where a project targets a Move-based chain. Other runtimes are evaluated case by case.
Need contracts built or reviewed?
Send us a specification or an existing repository. We will return a scoped plan for development, testing and audit coordination.