multiversx-protocol-experts_skill

Overview

This skill provides deep protocol-level expertise for MultiversX, covering sharding, consensus, ESDT token mechanics, cross-shard transaction semantics, and sovereign chain interactions. Use it when reviewing protocol changes, designing cross-shard dApp architectures, or troubleshooting asynchronous and cross-chain behaviors. It focuses on concrete checks, failure modes, and operational guidance for secure, efficient designs.

How this skill works

The skill inspects protocol semantics and runtime behaviors: shard assignment, metachain responsibilities, cross-shard SCR flow, and SPoS finality characteristics. It analyzes ESDT properties and built-in operations to validate token flows, permissions, and gas budgeting across shards. It also outlines sovereign chain gateway flows, proof handling, and mitigation patterns for bridge risks and reorgs.

When to use it

• Reviewing protocol-level code or proposed MIPs
• Designing dApps with cross-shard smart contract interactions
• Debugging async cross-shard callbacks and atomicity issues
• Implementing or auditing ESDT token logic and roles
• Planning sovereign chain integrations and gateway flows

Best practices

• Model cross-shard calls as atomic but asynchronous; always implement explicit callbacks and rollback paths
• Reserve gas on both sender and receiver shards; include extra gas for callbacks
• Wait for finality before acting on on-chain events to avoid reorg-induced inconsistencies
• Use protocol ESDT roles and properties rather than custom contract token logic when possible
• Design gateway flows with multi-sig, time locks, and cryptographic proof verification

Example use cases

• Code review checklist for a protocol patch affecting shard notarization or metachain behavior
• Architecting a marketplace that transfers NFTs and triggers cross-shard settlement with reliable callbacks
• Auditing a bridge implementation between MultiversX and a sovereign chain for proof and reorg handling
• Estimating gas budgets and failure modes for multi-token cross-shard contract calls
• Implementing user-facing services that wait for finality before crediting off-chain balances