Skill 06 cross chain bridge

Skill vaquarkhan/web3-agent-skills/skills/skill-06-cross-chain-bridge

Production-grade Agent Skills for Web3 AI agents: 15 workflows, 6 MCP servers, DeFi/NFT/compliance guardrails, and VS Code/JetBrains installers.

Install

npx -y skills add vaquarkhan/web3-agent-skills --skill skill-06-cross-chain-bridge

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Handles cross-chain operations including token bridging, cross-chain messaging, and intent-based routing. Use when moving assets or data between blockchains.

SKILL.md

2.6 KB, as published. Nobody here has run it

Cross-Chain Bridge

When to Use

Bridging tokens between L1 and L2 or across L2s
Sending cross-chain messages (LayerZero, Wormhole, CCIP)
Intent-based cross-chain swaps (Across, Stargate)
Validating bridge security before large transfers

Prerequisites

MCP: blockchain-rpc-server, price-feed-server, compliance-screening-server
Skills: skill-08 (bridge contract verification), skill-09 (screen recipient)

Workflow

1. Bridge Selection

Bridge	Type	Security Model
Native (Arbitrum, Optimism)	Canonical	L1 contract + fraud/validity proof
Stargate (LayerZero)	Liquidity	Oracle + relayer (configurable)
Across	Intent	Optimistic with bonded relayers
Wormhole	Messaging	Guardian multisig
CCIP (Chainlink)	Messaging	DON + Risk Management Network

For transfers > $10,000: prefer canonical bridges or CCIP over pure liquidity bridges.

2. Bridge Security Checklist

Bridge TVL and audit history reviewed
Contract verified on both source and destination chains
No active exploit warnings (check Rekt, bridge status pages)
Estimated time and fees acceptable
Destination address correct for target chain format

3. Execution

Approve token on source chain (exact amount)
Call bridge deposit/send function
Monitor source tx confirmation
Track message delivery (LayerZero scan, Wormhole explorer)
Claim on destination if manual claim required
Verify received amount matches expected (minus fees)

4. Cross-Chain Messaging

For dApp cross-chain calls:

Encode payload with target function selector
Set gas limit on destination via quote
Pay messaging fee in native token or LINK
Handle lzReceive / ccipReceive on destination

5. Intent-Based Routing

Across and similar protocols:

User expresses intent (source token → destination token)
Relayers compete to fill at best rate
Refund on source if not filled within deadline

Risk Warnings

Bridge hacks historically largest DeFi losses — verify before large transfers
Always test with small amount first on new routes
Never bridge to unverified recipient contracts

References

knowledge-base/chains/ — per-chain bridge addresses
references/bridge-security-matrix.md