Guide to install Roller - Dymension

Dymension is a vertical scaling Cosmos ecosystem by Rollapps

VNB Solutions

Jul 13, 2023

Minimum hardware requirements:

CPU: 2 cores.

Disk: 500 GB SSD (recommend NVME or SSD).

Ram: 16GB.

Access your local server or VPS from terminal. If you are completely newbies, visit here.

Step 1: Update libraries:

sudo apt update && sudo apt upgrade -y

Step 2: Install Roller (changed to version 1.03):

curl -L https://dymensionxyz.github.io/roller/install.sh | bash

Step 3: Check version of Roller

roller version

Result should be like this:

Step 4: Initiate Roller

roller config init --interactive

Enter your RollApp ID

Using this format to name your RollApp:
- Name: Lowercase English letters
- EIP155: 1 to 5 digit number representing the EIP155 rollapp ID
- Version: 1 to 5 digit number representing the version
Example: vnbnodesrollapp_8668-1
Specify your RollApp denom:
Name your native token as you want:
Example: RAX, TIA, DYM, BTC or ETH…
Set the genesis token supply:
This is the initial token supply in the RollApp (default: 1,000,000,000).
It’s up to you to define the quantity.
Select Data Availability layer
As default there are 2 DA layers: Celestia and Avail to select.

Select your execution environment:
As default is EVM or custom (RDK).

One you finished, it will return to you 3 address as below:

Copy 3 addresses and go to Discord devnet to claim faucets as below:

For Celestia address go to celestia-faucet:

After that check the balance in your wallets:

Step 5: Register for Roller

roller register

Result should be:

Step 6: Run the Roller

run command:

tmux

and then

roller run

Result should be:

Wait for about 10-15 minutes to active the Relayer. Once it’s active, you will see like this:

to escape : press combination: ctrl+b, then d.

Step 7: Do the interact via IBC transfer

rollapp_evm tx ibc-transfer transfer transfer channel-0 dym12ad4lux36lta7d75v2w6je2y386y9s5xp658pz 1000000000000000000uDYM --from rollapp_sequencer --keyring-backend test --home ~/.roller/rollapp --broadcast-mode block

Note: uDYM should inline with your native token that you created in item 2, Step 4. As default 18 additional decimal places, mean 1 DYM = 1000,000,000,000,000,000 uDYM.

You will be asked to confirm as below: Just type Y and go ahead.

The result will return the hash of transaction as below:

Step 8: Export keys

roller keys list

The result should be like this:

To export private keys, use the following commands (one by one):

roller keys export hub_sequencer

Then:

roller keys export rollapp_sequencer

and:

roller keys export my_celes_key

The results should be like:

Save these private keys in your private location (do not let someone see it).

Step 9: Import to Metamask

Copy and paste your roller-sequencer private key (from step 8) here:

Step 10: Add Roller network

Network name: Your Rollapp ID

New RPC URL: Your_IP_address : 8545

Chain ID: The EIP155 number in your Rollapp ID.

Currency symbol: Your RollApp denom

Example: For Rollapp ID: vnbnodep_1234-1

Once finished, you will see it like this:

Step 11: Create a NFT smart contract

Access to Remix.

Then you will see a page like this:

click on the contract folder to create new file:

Name it as: NFT.sol

in the content of NFT.sol, just copy and paste as below:

Note: in constructor: replace _name; _symbol as you want for NFT.

// SPDX-License-Identifier: UNLICENSED

pragma solidity 0.8.19;

import "https://github.com/transmissions11/solmate/blob/main/src/tokens/ERC721.sol";
import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/Strings.sol";

contract NFT is ERC721 {
    uint256 public currentTokenId;

    constructor(
        string memory _name,
        string memory _symbol
    ) ERC721(_name, _symbol) {}

    function mintTo(address recipient) public payable returns (uint256) {
        uint256 newItemId = ++currentTokenId;
        _safeMint(recipient, newItemId);
        return newItemId;
    }

    function tokenURI(uint256 id) public view virtual override returns (string memory) {
        return Strings.toString(id);
    }
}

Example: _name = vnbnode