Update docs can be found here: https://docs.snowbridge.network/rococo-testnet/rococo-sepolia-token-transfers

Disclaimer.

• Transfer times may vary.
• Only ERC20 token transfers are supported.

Sending ERC20 tokens from Ethereum to Polkadot

Sending tokens

Snowbridge has initially only activated support for the sending of ERC20 tokens to Polkadot. To send Ether to Polkadot you can use WETH (Wrapped ETH). To register your own ERC20 tokens see Registering Tokens.

1. Deposit ETH

If you already have WETH you can skip this step. If not go to the WETH contract and make a deposit.

Weth Contract Address: 0xfFf9976782d46CC05630D1f6eBAb18b2324d6B14

1. Click on the Contracts tab.
2. Click on the Write Contract tab.
3. Connect your wallet.
4. Enter 5 Gwei (0.000000005 Ether).
5. Click the write button and sign the transaction using your wallet.

2. Approve Snowbridge as a spender for your WETH

Snowbridge needs to be an approved spender for you to send tokens to Polkadot.