# The re.al blockchain

This page will present in a very condensed way what the re.al blockchain is, what tech it uses, why it's been created to support the new RWA ecosystem created by the Tangible and Pearl teams, and some additional technical aspects surrounding the chain. The goal isn't to provide a fully detailed and technical analysis, if you want to read more about the different features, you can find everything on [the official re.al documentation](https://docs.re.al/).

## The tech

The re.al blockchain is what is known as an Ethereum L2 that is using the Arbitrum Orbit technology. As a L2, re.al is settling blocks directly on Ethereum Mainnet using rollups to ensure maximum security and decentralization.

Arbitrum Orbit also enables the use of custom gas token. On re.al the gas token is reETH, a wrapped version of staked ETH locked on Ethereum Mainnet. Currently, reETH is using LIDO and its stETH token to generate yields which is then distributed to all reETH on re.al using a value rebase mechanism. This means that, over time, 1 reETH will be worth more ETH.

Additionally, Arbitrum Orbit comes with native bridging from Ethereum Mainnet, allowing some specific tokens to be bridged from/to re.al. This will be detailed in the [Native bridges](#native-bridges) section.

## Chain information

#### re.al Network Details <a href="#re.al-network-details" id="re.al-network-details"></a>

| Network Attribute | Value                                           |
| ----------------- | ----------------------------------------------- |
| chainID           | 111188                                          |
| Settlement Layer  | Ethereum                                        |
| Currency          | reETH                                           |
| RPC Url           | [https://real.drpc.org](https://real.drpc.org/) |
| Explorer          | <https://explorer.re.al/>                       |

## The explorer

re.al is using the [Blockscout explorer](https://explorer.re.al/) which is designed to be user friendly for non-developers. If you head to the explorer, you will be able to find many features like

* Account details: if you search for your wallet address, you will get the list of all transactions you made on the blockchain, as well as the list of ERC-20 tokens you hold in your wallet, list of NFTs, or your coin balance history. This is a relatively solid solution while we wait for a full DeBank support.
* List of [verified contracts](https://explorer.re.al/verified-contracts): easy way to see what the devs are shipping.
* List of [all tokens on re.al](https://explorer.re.al/tokens): easy way to get the address of a specific token and list of its holders.
* [Charts and stats](https://explorer.re.al/stats): see what's the average gas price, number of transactions, new accounts etc ...

## Layer Zero OFTs

Most tokens you will find on re.al are Layer Zero OFTs. LayerZero is a messaging protocol that allows transfers of tokens from one blockchain to another pretty seamlessly:

* The token from the source chain is burnt (destroyed)
* The token on the destination chain is minted (created)

This makes sure that the total balance of tokens across many chains remains constant without the need of liquidity pools on both the source and the destination chains. In order to make sure a token can be transferred between chains using LayerZero technology, the ERC-20 contract needs to have some specific functions that respect the [LayerZero specs for Omnichain Fungible Tokens](https://docs.layerzero.network/v2/developers/evm/oft/quickstart). Tokens that respect these standards can then be transferred to all the chains supported by LayerZero.

## Native bridges

Arbitrum Orbit comes with native bridging features from Ethereum Mainnet to re.al. This means that one can transfer some specific assets from Ethereum Mainet to the re.al L2 using the Arbitrum Orbit technology instead of the LayerZero OFT one.

A few things to note for these tokens though

* bridging from Ethereum to re.al usually takes 20 to 30 minutes
* bridging from re.al to Ethereum is taking at least 7 days due to the [security design of Arbitrum technology](https://docs.arbitrum.io/arbitrum-bridge/quickstart#withdraw-eth-or-erc-20-tokens-from-child-chain-to-parent-chain).
* the list of tokens that can be transferred using the native bridge is
  * reETH (wrapped version of stETH from LIDO, and used as gas token on re.al)
  * DAI (wrapped version of sDAI from Maker using Dai Saving Rate to generate yields)
  * USDC, USDT and WBTC

Please note that if you can theoretically bridge the tokens from the list above to re.al, not all tokens have use cases on re.al. Make sure that you do some preliminary researches on what to do with the tokens you want to bridge before doing it.


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