Ecto — Phantasma-Ethereum Swap Tutorial

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PhantasticPhantasma

6 min readMar 12, 2021

Welcome to the Phantasma cross chain asset swapping tutorials. These tutorials will guide you step by step through every detail necessary to ensure a successful cross chain asset swap using our wallets Poltergeist and Ecto.

Mind that if you do not have a Phantasma wallet or wallet address yet, we recommend starting out by downloading the wallet of your choice — Poltergeist for a standalone desktop wallet application that’s also available for Android, or our browser extension wallet Ecto which has that familiar Metamask feeling for Ethereum users. For a quick guide on wallet creation, backing up private keys and other basic things, check out the Poltergeist Basics tutorial or the Ecto Basics tutorial.

Choose your guide

Poltergeist — Swapping between Phantasma and Neo
Poltergeist — Swapping between Phantasma and Ethereum
Ecto — Swapping between Phantasma and Neo
Ecto — Swapping between Phantasma and Ethereum (this article)

Before we start — warning: reduced speed ahead

If you receive a message saying your swap has failed when claiming tokens in your Ethereum wallet, this is usually because the transaction has been broadcast, but not mined on Ethereum yet. If this happens, give it some time (15–20 minutes) and then try again — remember that transactions on the Ethereum blockchain take longer than you will have become used to while using the Phantasma mainnet.

Ecto wallet: Phantasma — Ethereum Swaps

Getting your Ecto Ethereum wallet ready

There are three basic ways to do this:

Use your existing Phantasma wallet and send ETH to your freshly created Ethereum wallet in Ecto, or
Import your existing Ethereum wallet holding ETH into Ecto using your private key. This will give you corresponding Phantasma and NEO addresses using the same private key, or
Create a new wallet in Ecto and send ETH to the Ethereum wallet that is created

Import your existing Ethereum wallet or create a new one

Once you have done this, you are ready to start swapping!

1 — Swapping from Ethereum to Phantasma

NOTE: Swapping to and from Ethereum is contingent on the speed of the Ethereum blockchain — you may face delays if it is congested, and it will be far slower than you are used to on the Phantasma blockchain.

1.1 Click Swaps > Swap from Ethereum

1.2 Select an asset

In this step, you need to select which asset you want to swap. In this example we are swapping Ethereum ETH into Phantasma ETH. Click the swap button that correlates to ETH.

1.3 Enter the amount you wish to swap

Enter the amount that you want to swap and click on Next.

NOTE: Gwei is a small unit of the Ethereum network’s Ether (ETH) cryptocurrency. A gwei is defined as 1,000,000,000 wei, the smallest base unit of Ether. One gwei equals 0.000000001 or 10^–9 ETH. Conversely, 1 ETH represents 1 billion gwei!
Gwei is a useful denomination to calculate gas fees (paid to miners for transaction processing) in a convenient way. The higher gwei fee you choose to pay, the faster your transaction will be processed by Ethereum’s miners. You can check the latest Ethereum transaction costs at the ETH gas station.

1.4 Authorize transaction

You will need to authorize all transactions in the wallet with your password. Enter your password here and click Sign TX in order to proceed with the swap.

Input your password to authorize the transaction

1.5 Wait for the swap to complete.

Ethereum-Phantasma swaps require 12 Eth confirmations

1.6 Claim your pending swap

When you get the Pending Swaps notification, your Ethereum asset has been successfully swapped into the corresponding Phantasma asset in your Phantasma wallet! Click on the Claim button in order to receive the swapped asset that’s currently pending.

1.7 Check your updated asset balances

Congrats! You have now completed the swap from Ethereum to Phantasma! You can check the transaction in the Activity tab.

2 — Swapping from Phantasma to Ethereum

Note: to be able to swap assets from Phantasma to Ethereum you must swap some ETH from Ethereum to your Phantasma mainnet wallet. This is necessary to pay the Ethereum side gas fees when swapping SOUL or KCAL from Phantasma to Ethereum. Mind that this is not necessary if you are swapping SOUL, KCAL, ETH or other assets from Ethereum to the Phantasma mainnet.

2.1 Click Swaps > Swap to Ethereum

After ensuring you have some ETH in your Phantasma wallet for the gas fee, click Swaps > Swap to Ethereum

2.2 Select an asset

In this step you need to select which asset you want to swap, in this example we are swapping Phantasma SOUL into Ethereum SOUL. Click the swap button that correlates to SOUL.

2.3 Enter the amount you wish to swap

Enter the amount you wish to swap from Phantasma to Ethereum and click next.

2.4 Authorize transaction

You will need to authorize all transactions in the wallet with your password. Enter your password here and click Sign TX in order to proceed with the swap.

2.5 Claim your pending swap

When you get the Pending Swaps notification, your Phantasma asset has been successfully swapped into its corresponding Ethereum asset in your Ethereum wallet! Click the Claim button in order to receive the swapped asset that’s currently pending.