Cosmos
May 1, 2025
Union V2 Guide: Complete Cross-Chain Transfers & Earn XP with Leap Wallet
Learn how to interact with Union V2 using Leap Wallet. Follow our step-by-step guide to complete cross-chain transfers across Xion, Sepolia, Holesky, Corn, and Babylon networks to earn XP rewards.
Union has just launched their V2 app, and it's a significant milestone for cross-chain interoperability. As they describe themselves, Union is "the blockchain of blockchains that's connecting Web3" - linking L1s, L2s, rollups, and appchains together.
By completing cross-chain transfers on their testnet, you can earn XP and achievements that may position you well for future opportunities when Union launches their mainnet.
What is Union?
Union is building infrastructure to connect various blockchain networks, enabling seamless asset transfers between different chains. Their V2 app update represents a major step toward their public mainnet launch.
The project currently supports five active chains on their V2 testnet:
Xion
Sepolia
Holesky
Corn
Babylon
This suggests they're building for the long term and focusing on reliability.
Recent developments include:
Launch of App V2 with a refreshed UX
Performance improvements for smoother transfers
Live network graph to track transfers in real-time
History tab to find your past transfers
Reintroduction of onchain quests to earn XP
Step-by-Step Guide to Interact with Union V2
1. Set Up Leap Wallet for Xion Testnet
Download Leap Wallet if you haven't already
Open Leap Wallet
Navigate to "Networks"
Search for "Xion Testnet" and enable it
2. Claim XION Testnet Tokens
Copy your Xion address from Leap Wallet
Paste it into the faucet and claim your tokens
3. Transfer from Xion to Other Networks
Go to https://app.union.build
Connect your wallet
Select Xion as the source chain
Choose Babylon or Holesky as the destination chain
Enter the amount of XION or USDC you want to transfer
Complete the transfer
4. Transfer WETH from Holesky
First, get Holesky ETH:
Visit https://alchemy.com/faucets/ethereum-holesky or https://cloud.google.com/application/web3/faucet/ethereum/holesky
Claim your Holesky ETH
Then wrap your ETH to WETH:
Follow the guide at Union's Twitter post
Finally, transfer WETH:
Go back to https://app.union.build
Select Holesky as source chain
Choose Xion, Sepolia, or Babylon as destination
Complete the transfer
5. Transfer BTCN from Corn Network to Babylon
Connect your wallet and claim BTCN
Bridge BTCN to Corn Network using this link
Go to Union app, select Corn Network as source and Babylon as destination
Choose WBTCN and complete the transfer
6. Transfer LINK from Testnet Networks
For Holesky:
Claim LINK at https://faucets.chain.link (Select Ethereum Holesky)
Go to Union dApp and transfer to Xion, Sepolia, or Babylon
For Sepolia:
Claim LINK at https://faucets.chain.link (Select Ethereum Sepolia)
Go to Union dApp and transfer to Holesky or Babylon
7. Track Your Progress and Earn XP
Connect your wallet
Check your completed quests and XP
Socials & Resources
Union App: https://app.union.build
Union Dashboard: http://dashboard.union.build
Union Twitter: @union_build
Leap Wallet Twitter: @leap_wallet
FAQs
What is Union?
Union is a cross-chain interoperability protocol that connects different blockchain networks, allowing for seamless asset transfers between them.
Why should I participate in the Union V2 testnet?
Participating allows you to earn XP and achievements that may position you well for future opportunities when Union launches their mainnet.
Do I need real crypto to participate?
No, you'll be using testnet tokens that can be claimed from various faucets at no cost.
Which wallet should I use?
Leap Wallet is ideal as it supports 200+ chains natively, including the Cosmos ecosystem that Xion is part of, making it perfect for cross-chain interactions.
Will my testnet activity count toward anything?
Yes, transfers on the testnet will count toward Testnet 9 achievements and XP on the Union dashboard.
How do I know if my transfers are successful?
You can track your transfers in real-time using the live network graph and check your history in the History tab of the Union app.
Will more chains be added to Union V2?
Yes, according to Union, more chains will be added to the testnet in the future.
