Blockchain · Infrastructure
Settlement rails with on-chain certainty
On-chain settlement infrastructure with audited contracts and the off-chain services that make it usable.
In short
Blockchain build, in short
- Minimal, audit-ready smart contracts
- A test suite covering known attack classes
- Off-chain indexing and notification services
- Considered key management and signing flows
What made this hard.
On-chain code is unforgiving: it is public, immutable once deployed and holds value directly. A bug is not a patch, it is a loss.
The work was settlement infrastructure that is provably correct on-chain and genuinely usable off-chain, where most of the product actually lives.
Stack
- Solidity
- Foundry
- TypeScript
- Node.js
- The Graph
- Ethereum
The build, step by step.
Contracts written to be audited
Smart contracts are kept small, explicit and testable, with the assumption that every line will be reviewed by an adversary.
Tested against attacks
We test the failure cases — reentrancy, overflow, access control — not just the happy path, before anything touches value.
Off-chain where it belongs
Indexing, notifications and UX sit off-chain, so the contract stays minimal and the product stays responsive.
Keys handled seriously
Signing and key management follow established practice, because the strongest contract is undone by a careless key.
What you walk away with.
- Minimal, audit-ready smart contracts
- A test suite covering known attack classes
- Off-chain indexing and notification services
- Considered key management and signing flows
Services involved
Settlement rails with on-chain certainty questions, answered.
Still unsure if Settlement rails with on-chain certainty is right for your project? A senior engineer will tell you straight on a free call.
Contracts are kept small and explicit, and tested against known attack classes such as reentrancy and overflow before they touch value. The assumption throughout is that every line will be attacked.
Only what needs the chain's guarantees stays on-chain. Indexing, notifications and the interface sit off-chain, which keeps contracts minimal and the product responsive.
Signing and key management follow established practice, because even a correct contract can be undone by a careless key. It is treated as part of the security surface, not an afterthought.
Building something similar?
Book a free 30-minute consultation. We'll pressure-test your challenge and map a path forward, whether or not we end up working together.