Wallet setup
You need one wallet to use LinkiSwap. It doesn't matter which brand — as long as it supports Ethereum-style chains and can connect to a website, it works.
If you already have a wallet you're happy with, you can skip most of this page. Just make sure it has:
- Some testnet gas on the chains you want to swap between.
- Some testnet USDC to swap.
1. Pick a wallet
Recommended for first-timers: MetaMask — install it as a browser extension. Takes two minutes.
Also works out of the box:
- Rabby
- Coinbase Wallet
- Rainbow
- Trust Wallet
- Any WalletConnect-compatible wallet (mobile wallets like Zerion, MetaMask Mobile, etc. connect by QR code)
LinkiSwap uses RainbowKit under the hood, so anything RainbowKit supports, LinkiSwap supports.
2. Save your recovery phrase
When you create a new wallet, it will show you a 12- or 24-word recovery phrase. This is the only way to recover your wallet if you lose your device.
- Write it down on paper.
- Store it somewhere safe.
- Never type it into a website. Never photograph it. Never paste it into a chat.
Even on testnet, get into this habit now — the mainnet version of this mistake is expensive.
3. Add the testnet networks
Some wallets ship with the testnets already enabled; some don't. If a chain doesn't show up when you connect to LinkiSwap, add it manually. Full RPC details are on Supported networks — or use chainlist.org to add them with one click.
The four you'll want:
- Optimism Sepolia
- Base Sepolia
- Polygon Amoy
- Ethereum Sepolia
You don't need to switch networks manually — LinkiSwap will prompt you to switch to the source chain when you confirm an intent.
4. Get testnet gas
Every swap needs a tiny amount of gas on the source chain. On testnet, gas is free — you request it from a faucet (a page that sends you a small amount).
| Chain | Faucet |
|---|---|
| Optimism Sepolia | https://console.optimism.io/faucet |
| Base Sepolia | https://faucet.quicknode.com/base/sepolia |
| Polygon Amoy | https://faucet.polygon.technology (Amoy + POL) |
| Ethereum Sepolia | https://cloud.google.com/application/web3/faucet/ethereum/sepolia |
Some faucets ask you to sign in with GitHub or a Google account — this is a spam prevention measure, not a wallet permission.
One faucet request per chain is enough for dozens of swaps.
5. Get testnet USDC
See Supported networks → Where to get testnet USDC for the contract addresses. The team can mint you a batch on request.
6. Connect to LinkiSwap
Go to linkiswap.app and click Connect Wallet in the top right.
- Pick your wallet from the list.
- Approve the connection prompt in your wallet (this only grants permission for the site to see your address — it can't move funds).
You're ready. Head to the Quickstart to do your first swap.
Do I need one wallet per chain?
No. One wallet holds the same address on every EVM chain. Your OP Sepolia address, your Base Sepolia address, and your Polygon Amoy address are all the same string — the network is just a switch.
That's why you can swap across chains without juggling accounts.
Can LinkiSwap access my funds?
No.
- LinkiSwap never sees your recovery phrase.
- LinkiSwap never sees your private key.
- Every action that moves funds requires an explicit signature in your wallet — you see exactly what you're signing before you approve.
- You can disconnect the site from your wallet at any time (in most wallets, under Connected sites or similar).
The one thing you do grant is a Permit2 approval the first time you swap a given token on a given chain. That's a standard, revocable permission for LinkiSwap to move the specific token you're swapping. You can revoke it at any time via a tool like revoke.cash.