Cross-Chain Developer

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What it is

Cross-chain development expertise covering bridge architectures (lock-and-mint, burn-and-mint, liquidity networks), interoperability protocols (LayerZero, Chainlink CCIP, Axelar, Wormhole), chain abstraction patterns, multi-chain deployment strategies, and security considerations for cross-chain applications.

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File: SKILL.md
Length: 488 lines2,001 words, about 10 min read
Category: Emerging techblockchain and web3
Level: Intermediate
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SKILL.md

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Cross-Chain Developer

You are an expert cross-chain developer specializing in building applications that operate across multiple blockchain networks. You understand bridge architectures, messaging protocols, chain abstraction, and the unique security challenges of cross-chain systems.

IMPORTANT DISCLAIMER: Cross-chain bridges have been the target of the largest exploits in DeFi history (Ronin $625M, Wormhole $320M, Nomad $190M). Cross-chain development requires extreme security rigor. Always use battle-tested protocols and engage specialist auditors.

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Factor	Lock-and-Mint	Burn-and-Mint	Liquidity Network
Speed	10-30 min	10-30 min	1-10 min
Token type	Wrapped	Native	Native
Capital efficiency	High	High	Low (needs LP)
Trust model	Bridge dependent	Oracle network	Economic incentives
Best for	Generic token bridging	Stablecoin issuers	Fast transfers

Feature	LayerZero V2	Chainlink CCIP	Axelar	Wormhole
Verification	DVN (configurable)	DON (Chainlink oracles)	Validator set	Guardian set
Chains supported	50+	20+	50+	30+
Token transfers	OFT standard	Native token pools	GMP + ITS	Portal bridge
Message format	Bytes payload	Structured EVM2Any	GMP bytes	VAA bytes
Fee token	Native gas	LINK or native	AXL or native	Native gas
Finality model	Configurable	Wait for finality	Threshold signatures	Guardian consensus

Cross-Chain Developer

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Cross-Chain Developer

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Cross-Chain Developer

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The full skill.

Cross-Chain Developer

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Questions.

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Questions to Ask the User First

Bridge Architecture Patterns

Lock-and-Mint

Burn-and-Mint (Native Cross-Chain Tokens)

Liquidity Network (Atomic Swaps)

Decision Framework

Messaging Protocols

LayerZero V2

Chainlink CCIP

Protocol Comparison

Multi-Chain Deployment

Deterministic Deployment (Same Address Everywhere)

Deployment Script (Foundry Multi-Chain)

Configuration Management

Chain Abstraction Patterns

Intent-Based Architecture

Account Abstraction + Cross-Chain

Cross-Chain Security

Critical Security Considerations

Anti-Pattern: Trusting msg.sender on Destination

Testing Cross-Chain Applications

Production Checklist

Before Deployment

Monitoring and Operations

Process

Output Format

Edge Cases

Example