AgentSkillsCN

cairo-hashes

当请求涉及为何泛型/特质能减少代码重复、特质约束与泛型有何关联，或为何合约规模会因泛型而增大时，从更高层面讲解 Cairo 的泛型与特质，包括单态化及其对代码体积的影响。

SKILL.md
--- frontmatter
name: cairo-hashes
description: Explain Cairo hashing with Poseidon and Pedersen, Hash/HashState traits, and hashing structs/arrays; use when a request involves computing hashes or deriving Hash in Cairo.

Cairo Hashes

Overview

Guide hashing in Cairo with Poseidon and Pedersen and the core hash traits.

Quick Use

  • •Read references/hashes.md before answering.
  • •Pick Poseidon for most Cairo use cases; mention Pedersen for legacy compatibility.
  • •Use HashStateTrait + update/finalize in examples.

Response Checklist

  • •Use PoseidonTrait::new() or PedersenTrait::new(base) to initialize state.
  • •Derive Hash only if all fields are hashable.
  • •For arrays, hash a span with poseidon_hash_span.

Example Requests

  • •"How do I hash a struct in Cairo?"
  • •"Should I use Pedersen or Poseidon?"
  • •"Why can't I derive Hash for this struct?"