Contract

Data Contracts

How WCF uses [DataContract] and [DataMember] to define the exact wire shape of types exchanged between services and clients.

Operation Contracts

How [OperationContract] defines individual callable methods on a WCF service, including one-way calls, faults, and async patterns.

Securing WCF Endpoints

Practical, end-to-end guidance for locking down a WCF service endpoint — binding choice, behaviors, authorization, and operational hardening.

Service Contracts

How the ServiceContract and OperationContract attributes define the public interface of a WCF service, and the rules that govern them.

The Reduce Phase

How reducers consume grouped intermediate data, apply the reduce() contract, and commit final output, including reducer count tuning and fault tolerance.

Auditing Smart Contracts

What a smart contract audit is and is not: the common vulnerability classes auditors hunt, the static, symbolic, and fuzzing tools that assist them, and why ma…

Building a Simple Token Contract

A hands-on walkthrough of writing an ERC-20 token in Solidity, from the standard's required interface to a minimal from-scratch implementation and the safer Op…

Your First Smart Contract

Write, compile, and deploy a complete storage contract, learning about the constructor, functions, events, access control, and the payable keyword along the wa…

Testing Microservices

How the test pyramid, contract testing, and chaos experiments combine to give confidence in a system made of many independently deployed services.

Contract Testing Explained

Understand how contract testing verifies that independently-deployed services agree on the shape of their API, catching integration breakage without full end-t…