ReadMeFeed / Community knowledge
Real questions. Useful conversations. Find the people who know your stack.
Clarity’s read‑only functions let you query contract state without paying gas. This blog explains when to use them, how to declare and call them, and the trade‑offs you need to know before adding them to your smart contract.
Clarity’s optional type lets contracts safely represent nullable values. Learn how to declare, pattern‑match, and verify optional data in smart contracts, plus trade‑offs and a concrete example.
Clarity view functions let you read contract storage without gas. Learn how to declare, call, and verify them, plus common pitfalls and limits.
Clarity post-conditions are mandatory safety rails that constrain which asset movements a contract may perform. This guide shows how to declare them, a worked STX-token swap example, common mistakes, and how to verify enforcement on Stacks.
Clarity's decidable, interpreted design means contract cost and termination are knowable before execution. Here's what that buys you — and where bounded iteration pushes back.
Clarity enforces deterministic smart contract execution on Stacks through a decidable stack machine, enforced read/write boundaries, and statically known gas costs — here's how that works and what it costs you.
How Clarity's define-read-only functions let you inspect contract state with zero STX fees, with examples, composition patterns, and verification steps.
Learn when to use Clarity view versus public functions, see a side‑by‑side comparison, and validate the choice with a sample contract and CLI commands.
Keep Git as the source of truth for Docker Compose in Portainer 2.x by deploying stacks via the Repository method, redeploying with ref changes or webhooks, and rolling back through Git history.
clarity