Solidity is a statically typed programming language used to write smart-contract source code. A Solidity language wiki can explain its terminology and concepts and show how they fit into development, while keeping the language distinct from compiled output, deployed contracts, and the applications that use them. source

What is Solidity?

Solidity is a programming language with a type system: it includes value types, reference types, mappings, arrays, structs, enums, function types, and contract types. Those categories describe language constructs that developers can use when writing programs. They do not, by themselves, describe a complete application or protocol. source

A Solidity contract is a program expressed in that language. A source file is not the same thing as compiled output or a deployed instance. Solidity documentation describes language rules and conventions; it should not be treated as a description of every system that may be built with the language.

This distinction helps readers identify what a reference entry can answer. A language entry can explain what a term means in Solidity and how the language describes it. It cannot, merely by defining a term, establish how a particular application or deployment is configured.

What a Solidity language wiki should explain

A wiki-style reference should make language concepts easy to find and relate. It can define terms, group concepts, and help readers understand how the language’s type categories and source-file conventions fit together. Its purpose is to orient readers and clarify vocabulary, not to replace the documentation that governs a specific compiler context.

Version context matters. Solidity source files should declare an SPDX license identifier and a compiler-version pragma. The pragma constrains which compiler versions are acceptable; it does not choose the compiler that will be run. source

A reference should make this difference clear rather than inviting readers to assume that a pragma records the exact compiler used. An exact version pin can prevent a source file from being compiled automatically with a different compiler version that may introduce breaking behavior. However, pinning a version does not establish that the program is correct or secure, and dependencies and build tools also need to be recorded. source

A concise wiki can therefore serve as a map to language documentation: it can introduce terminology and point readers toward version-aware explanations. When a question depends on precise compiler behavior, readers should check documentation for the relevant version instead of treating a broad summary as a universal rule.

How Solidity fits into smart-contract development

Solidity belongs at the source-code stage of smart-contract development: it is used to express program behavior in a language that developers can read and maintain. That does not make writing source code identical to compiling it, deploying it, connecting an application to it, or operating the resulting system. Those are separate activities, and this overview does not provide procedures for carrying them out.

One relevant boundary is the contract ABI, or application binary interface. The Solidity ABI specification defines how function selectors, arguments, return values, errors, and events are encoded between applications and EVM contracts. An application needs an ABI that matches the deployed contract interface and network address. The reference can explain what the ABI is, but the matching of a particular application to a particular deployed contract is a separate integration matter. source

That distinction also helps keep a language wiki within scope. It can explain the terms involved in source code and interfaces without claiming that a specific application has selected the right contract, address, or interface. It can describe the role of Solidity without becoming a general guide to applications or deployment.

What a language reference does not establish

Reading Solidity documentation does not establish that a particular program is correct, secure, or suitable for a particular purpose. A compiler-version constraint helps make the intended compiler range clearer, but a version pin is not a correctness or security guarantee. Recording dependencies and build tools is also relevant to version context. source

Likewise, an ABI definition explains an encoding interface; it does not prove that an application uses an ABI matching the deployed contract interface and network address. That match must be considered separately when evaluating an integration. source

A language description alone also does not establish interoperability, compliance, legal status, tax treatment, availability, fees, yield, recovery options, or successful deployment. This article makes no conclusions in those areas. Each is a separate question that requires evidence appropriate to the specific context. Detailed treatment of individual language features, vulnerabilities, and deployment procedures is outside this overview’s scope.

How to use the reference responsibly

Begin by identifying the documentation version and compiler context relevant to the question. Read a source-file pragma as a constraint on acceptable compiler versions, not as proof of which compiler was used. If behavior could depend on the compiler version, consult version-specific documentation and project records rather than relying on an unqualified summary. source source

Next, distinguish language definitions from integration facts. For example, an ABI reference can explain how applications and EVM contracts encode calls and results, while checking that a particular application’s ABI matches its target contract and network address remains a separate verification step. source

Finally, treat claims about correctness, security, legal or regulatory status, costs, availability, or recovery as questions beyond what a language definition can answer. Solidity tells readers what language is being used; it does not, by itself, settle those broader questions.

A Solidity language wiki is most useful as a reference to the language’s vocabulary, types, and source conventions. It can clarify where Solidity fits in contract development while leaving compiler-specific behavior, integration, deployment, and system-level judgments to their own documentation and evidence.

Sources and references