certora

Name: certora
Availability: InStock
Author: 0xinit

Verify smart contract correctness with Certora Prover and CVL specifications.

Updated Aug 27, 2026

Search Tags:#security #formal verification #smart contracts #solidity #certora #cvl

Ready to run

npx skills add https://github.com/0xinit/cryptoskills --skill certora

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: certora
Source: https://github.com/0xinit/cryptoskills/tree/main/skills/certora
Command: npx skills add https://github.com/0xinit/cryptoskills --skill certora

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill requires certora-cli, and includes scripts (resource) and references (resource) components.

What problem does it solve?

This Skill addresses the critical need for mathematical certainty in smart contract correctness, preventing costly bugs and exploits by formally verifying code logic.

Core Features & Use Cases

Formal Verification: Use Certora's Prover to mathematically prove properties about your smart contracts.
CVL Specifications: Write detailed specifications in Certora Verification Language (CVL) to define desired contract behavior.
Use Case: Ensure your DeFi protocol's core accounting logic (e.g., total supply always equals sum of balances) holds true for all possible inputs and states, providing a higher assurance than traditional testing.

Quick Start

Use the certora skill to verify the 'Token.sol' contract against the 'Token.spec' specification.

Frequently Asked Questions about certora

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I formally verify smart contract correctness in Solidity?▼

To formally verify smart contract correctness, you write Certora Verification Language (CVL) specifications defining desired behaviors, then use a prover to mathematically prove those properties hold for all possible inputs and states.

What is formal verification and how does it secure DeFi protocols?▼

Formal verification secures DeFi protocols by mathematically proving code properties and invariants, ensuring logic like total supply equaling the sum of balances holds true, providing higher assurance than traditional testing against costly bugs.

Do I need Certora CLI to run CVL specifications?▼

Yes, you need the Certora CLI installed to execute formal verification. The CLI interfaces with Certora's Prover to process your CVL specifications and mathematically verify complex state transitions in your smart contracts.

How do I prove state invariants for DeFi protocols using CVL?▼

You prove state invariants for DeFi protocols by writing detailed CVL specifications that define desired contract behavior, enabling the prover to mathematically verify these invariants hold true across all possible inputs and complex state transitions.

Why use formal verification instead of traditional testing for smart contracts?▼

Use formal verification instead of traditional testing to achieve mathematical certainty in smart contract correctness. It proves properties hold for all possible inputs and states, preventing costly bugs and exploits that random test cases might miss.

Can I verify complex state transitions in Solidity smart contracts?▼

Yes, you can verify complex state transitions in Solidity smart contracts by defining the expected behaviors in CVL specifications and running them through Certora's Prover to mathematically prove the transition logic is correct.