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ブロックチェーン・Web3・デジタル資産
スマートコントラクト開発
Solidity、Rust、Moveによるスマートコントラクトの設計、実装、テストを行います。可読性が高く、アップグレードを考慮し、第三者監査にすぐ対応できるコードを記述します。
概要
A deployed smart contract is public, adversarial and difficult to change. That reality shapes how we work: small surface areas, explicit access control, well-understood libraries, and a test suite that tries hard to break the code before anyone else does.
We write contracts for EVM chains in Solidity, for Solana in Rust with Anchor, and for Move-based networks such as Aptos and Sui. Every engagement ends with code an independent auditor can review efficiently: documented, tested and free of avoidable surprises.
ビジネスでの活用領域
- 01
Token contracts
Fungible and non-fungible tokens built on ERC-20, ERC-721 and ERC-1155, and permissioned tokens on ERC-3643 where transfers must respect identity and eligibility rules defined by the issuer and its counsel.
- 02
Business and protocol logic
Escrow, vesting, multi-party approval, registry and governance contracts that encode agreed rules, with role-based access control, pausability and timelocks applied wherever the risk profile calls for them.
- 03
Upgradeable systems
Transparent, UUPS or diamond proxy patterns when upgradeability is a genuine requirement, paired with storage layout checks and governance controls so that an upgrade path cannot quietly become a backdoor.
- 04
Smart accounts and account abstraction
ERC-4337 smart accounts, paymasters and session-key modules that let applications sponsor fees, batch actions and apply spending policies without forcing users to manage gas or raw transactions.
エンジニアリングアプローチ
- 01
Specification first
We write a plain-language specification of intended behavior, invariants and privileged roles. It becomes the reference for tests, audits and later changes, and it surfaces ambiguity early.
- 02
Library-first implementation
We build on audited OpenZeppelin or Solady components wherever possible and keep custom logic small, explicit and commented, following checks-effects-interactions and current compiler guidance.
- 03
Adversarial testing
Unit tests, stateful fuzzing and invariant testing in Foundry or Echidna, plus static analysis with Slither and Aderyn, target reentrancy, access control, rounding and oracle manipulation risks.
- 04
Formal methods where warranted
For high-value or tightly constrained logic, we identify properties suited to formal verification tools such as Certora Prover or Halmos and bring in specialists when that depth is justified.
- 05
Audit readiness and deployment
We assemble an audit package with specification, coverage and known limitations, support remediation, and run scripted, reproducible deployments with source code verified on block explorers.
技術とプラットフォーム
Languages
- Solidity
- Vyper
- Rust (Anchor)
- Move (Aptos and Sui)
Frameworks and libraries
- Foundry
- Hardhat
- OpenZeppelin Contracts
- Solady
- Anchor
Testing and analysis
- Foundry fuzz and invariant tests
- Echidna
- Slither
- Aderyn
- Halmos
- Certora Prover
Standards
- ERC-20
- ERC-721
- ERC-1155
- ERC-3643
- ERC-4337
- EIP-2612
記載の技術名は各社の商標であり、提携関係や推奨を意味するものではありません。
提供する成果物
- Contract specification with invariants and role definitions
- Source code with NatSpec documentation
- Unit, fuzz and invariant test suites with coverage reports
- Static analysis results and remediation log
- Audit-readiness package and auditor support
- Reproducible deployment scripts and verified contracts
経営層からのよくある質問
Do you audit the contracts you write?
No. We test rigorously and prepare code for audit, but an author cannot independently audit their own work. For contracts that will hold or move meaningful value, we recommend an independent audit firm and support the process through remediation and re-review.
Should our contracts be upgradeable?
It depends on the trust model. Upgradeability lets you fix defects, but it also creates an administrative authority that users must trust. We weigh both, and when upgrades are needed we pair them with timelocks, multisig control and published governance procedures.
Which chains can you deploy to?
We work across EVM-compatible networks, including Ethereum, Arbitrum, Optimism, Base and Polygon, as well as Solana and Move-based chains. Chain selection should follow your users, security requirements, fee profile and ecosystem tooling rather than trends.
スマートコントラクト開発の取り組みについて相談する
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