Solange Gueiros presents a Chainlink workshop on creating cross-chain tokens using the CCT (Cross-Chain Token) standard and CCIP (Cross-Chain Interoperability Protocol). She explains how Chainlink’s decentralized oracle network connects blockchains to external data and services, enabling secure interoperability. Key services discussed include data feeds, data streams, proof of reserves, Chainlink Functions (for integrating Web2 APIs), automation, and VRF (verifiable random functions).

The core focus is on CCIP, which allows secure token and message transfers across blockchains, supporting both lock/unlock and mint/burn models. The Token Manager interface simplifies deploying and managing cross-chain tokens, setting token pools, and configuring rate limits. Solange highlights the use of Chainlink Local for rapid prototyping without mainnet constraints, and encourages hackathon participants to leverage Chainlink’s services. She answers questions on supported networks, integrating DeFi protocols, and cost considerations, emphasizing documentation and community support.

00:00 Introduction
00:35 Speaker Introduction & Resources
01:14 What are Oracles?
02:21 Chainlink Services Overview
03:55 Chainlink Functions & Automation
05:20 CCIP & CCT Overview
06:47 Blockchain Interoperability Explained
08:33 Cross-Chain Token Workflow
09:39 Token Pools: Lock/Unlock vs Mint/Burn
10:08 CCIP Security Architecture
11:01 Deploying Cross-Chain Tokens with Token Manager
12:05 Token Pools & Rate Limits
12:47 Testnets & Chainlink Local
14:49 Developer Resources & Documentation
15:43 Q&A: Chainlink Functions vs CCIP
17:12 Q&A: Supported Networks & Token Manager
18:33 Q&A: Bridging Tokens & DeFi Integration
19:07 Q&A: Security, Trust, and Costs
20:30 Closing Remarks & Support

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🇺🇸 ETHGlobal New York
This workshop is specifically for ETHGlobal New York, a 3-day hackathon held August 15-17, bringing together the most skilled web3 developers, designers and product builders from all around the globe for a weekend-long adventure to advance the Ethereum ecosystem! Watch the full ETHGlobal New York 2025 playlist here:    • ETHGlobal New York 2025  

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