Medalla Testnet: Lighthouse Client - macOS - Ethereum 2.0 Knowledge Base

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Medalla Testnet: Lighthouse Client - macOS

Altona Testnet

​Official Lighthouse docs
​Lighthouse Discord server​
Requirements: 
A synced Goerli node (Guide till step 3.)
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1. Step 
Installing Rust
Open a terminal window and paste the following in:
curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
"Current installation options"
Press "1" and confirm with Enter.
"Next time you log in this will be done automatically"
Close this terminal window and open a new one.
2. Downloading and building Lighthouse
git clone https://github.com/sigp/lighthouse.git
cd lighthouse
and then run make
Wait a few minutes
Once the process is done it will look like the following
3. Find the binary file
Open Finder and head over to ~/.cargo/bin/
Copy the Lighthouse file to a more convenient folder.
4. Start the beaconnode
Make sure the goerli node (ETH1) is running as mentioned in the requirements.
Drag and drop the Lighthouse file and add --testnet medalla beacon --eth1 --http --graffiti "beaconcha.in<3" 
5. Create ETH2 Wallet
Lighthouse allows you to create an ETH2 wallet and attach your validator keys.
Open a new Terminal window, drag and drop the Lighthouse file and add
account wallet create --name my-validators --passphrase-file my-validators.pass
The 12 word mnemonic phrase can restore the ETH2 wallet - write the words down.
The wallet is located in $HOME/lighthouse
6. Create ETH2 Keys
Use the same Terminal window, drag and drop the Lighthouse file and add 
lighthouse account validator create --wallet-name my-validators --wallet-passphrase my-validators.pass --count 1
7. Depositing to Ethereum 2.0
First, find the deposit data of the newly created ETH2 Key , which is located in .lighthouse/validators/ 

There are two lighthouse folders, .lighthouse is a hidden folder.
Enable hidden folders with CMD + Shift + .
Open the eth1-deposit-data.rlp file with a text editor. 
Copy the 842 long text sequence and follow these steps.

Medalla Deposit contract address: 0x07b39F4fDE4A38bACe212b546dAc87C58DfE3fDC
The deposit will be recognised by the beacon-chain in 8.5 hours.
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8. Starting the validator
Open a new terminal window, drag and drop the Lighthouse file and add validator --auto-register
In total there are three terminal windows running simultaneously! 
Track your validator performance.
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