Cross-Chain Transfer Guide — Polkadex Testnet

This guide explains how to get testnet tokens and transfer them between Polkadex and Sepolia (Ethereum testnet).

What you can do

• Get free testnet tokens directly from the Polkadex Exchange UI
• Transfer tokens from Sepolia to Polkadex
• Transfer tokens from Polkadex back to Sepolia

The same set of tokens is available on both chains: PDEX, WETH, WBTC, USDC, USDT, LINK, UNI, AAVE, wstETH.

Recommended wallet — Enkrypt

We recommend using Enkrypt as your wallet for testing. Enkrypt is a multi-chain browser extension that supports both Ethereum (Sepolia) and Polkadex in a single extension — so you don't need to juggle two separate wallets.

Setup:

1. Install the Enkrypt extension for your browser
2. Create a new wallet or import an existing one
3. Switch to the Sepolia network for your Ethereum address
4. Switch to the Polkadex network for your Polkadex address

MetaMask (Ethereum only) and the Polkadot.js extension (Polkadex only) also work if you prefer to use them separately.

Step 1 — Get testnet tokens from the faucet

Open the Polkadex Exchange UI and navigate to the Faucet section. You can request tokens for both chains from there:

• Polkadex tokens — enter your Polkadex wallet address to receive PDEX and other assets directly on-chain
• Sepolia tokens — enter your Ethereum wallet address to receive ERC-20 tokens on Sepolia

Each token has a daily limit of 1 drip per address. Wait 24 hours before requesting again.

Step 2 — Cross-chain transfers

Once you have tokens, you can bridge them in either direction through the Exchange UI.

Sepolia → Polkadex

1. Connect your Ethereum wallet (MetaMask or Enkrypt) to the Exchange UI
2. Select the token and amount you want to transfer
3. Enter your Polkadex wallet address as the destination
4. Confirm the transactions in your wallet — your wallet will prompt you twice (once to approve the token, once to send)
5. Wait a few minutes for the transfer to arrive on Polkadex

Note: Transfers from Sepolia require a small amount of Sepolia ETH for gas fees. Get free Sepolia ETH from the Google Sepolia faucet.

Polkadex → Sepolia

1. Connect your Polkadex wallet (Enkrypt or Polkadot.js extension) to the Exchange UI
2. Select the token and amount
3. Enter your Ethereum wallet address as the destination
4. Sign the transaction
5. Wait a few minutes for the transfer to arrive on Sepolia

Transfers from Polkadex do not require ETH — only a small amount of PDEX for the Polkadex network fee.

Sepolia token contracts

To see your Sepolia token balances in MetaMask or Enkrypt, import the following contract addresses:

How to import a token in MetaMask / Enkrypt:

1. Open the wallet extension and switch to the Sepolia network
2. Scroll down and click Import tokens
3. Paste the contract address — the token symbol and decimals will fill in automatically
4. Click Add custom token

Transfer times

Transfers typically complete around 20 minutes after the transaction is confirmed. Timing depends on the Ethereum Sepolia chain and the cross-chain testnet.