Smart Contract Development
Explicit On-Chain Rules|Testable Contract Behaviour|.NET Application Integration
Sphere 10 builds smart contracts and the applications that use them. We translate an agreed business rule into a precise state machine, implement the chosen chain's contract code and connect it to .NET services. Delivery includes the deployment process, administration model and evidence that the complete interaction behaves as specified.
Make Authority and State Changes Explicit
We specify the contract's states, permitted transitions and authority for each action before implementation. This includes who may change configuration, move assets, pause an operation or upgrade code. The design identifies which rules must be enforced on-chain and which belong in the application, with clear handling for information supplied by external systems.
For EVM projects, Solidity and established OpenZeppelin components provide a practical starting point. We choose extensions deliberately and review the interaction between permissions, external calls and stored state. Upgradeability is a product decision with administrative and storage-layout consequences; it is defined in the specification rather than introduced as an undocumented convenience.
Connect Contract Events to the Business Application
Nethereum connects the compiled ABI to C# contract calls and event handling. ASP.NET Core services enforce application permissions, prepare requests and maintain a queryable view of relevant activity. Sphere10 Framework supplies reusable application, data and logging mechanisms for those services; the EVM contract remains implemented in its native environment.
Our BlockchainSQL Server work demonstrates the separate off-chain processing required to make blockchain data useful to a business. We apply that discipline to event checkpoints, confirmation status and reconciliation. Application records retain contract and network identity so a deployment change cannot silently redirect an existing workflow.
Review the Exact Build Proposed for Deployment
We test unauthorised calls, boundary values, repeated actions and external-call failure alongside normal behaviour. Where appropriate, invariant and fuzz tests challenge assumptions across many operation sequences. Integration acceptance verifies wallet rejection, transaction replacement, delayed confirmation and consistency between emitted events and application state.
You receive a reproducible build and a release checklist tied to the exact contract artefact. Independent security review can be scheduled before deployment, with remediation and retesting included in the agreed scope. After release, source, addresses, permissions and operational procedures remain available to your team for support and future changes.
Platforms & Tooling
.NET C# Solidity OpenZeppelin Nethereum ASP.NET Core Sphere10 Framework
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