Original link:Continued Path to Decentralization: Bridging Tokens into Arbitrum | by Offchain Labs | Sep, 2021 | Medium

Compilation: Eigen Labs (Eigen Network is the first tool to provide privacy protection on Arbitrum)

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in last week'stweetsIn 2019, we announced that Arbitrum One was officially launched, and the development and interactive functions based on Arbitrum were also launched simultaneously. However, matters related to Token cross-chain are still in progress. As of now (2021.9.11), we are still discussing with some project party friends, which Tokens can be cross-chained to Arbitrum.

Image Source:https://offchain.medium.com/mainnet-for-everyone-27ce0f67c85e

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The reason for this is to allow each project to obtain the type of Token that meets their needs. Currently, we divide the ERC-20 Token that cross-chains to Arbitrum into two types: standard type and customized type. Standard ERC-20 tokens that support basic ERC-20 functions and mutual transfer between Layer1 and Layer2. Custom ERC-20 tokens refer to tokens with auxiliary functions, such as governance coins and stable coins.

If a standard ERC-20 token has been cross-chained to Arbitrum, but later another project creates a new address, we will merge the two addresses representing the same Token, so as not to cause confusion to users or developers. Although this situation will not cause a security risk (user funds will not be lost and can be withdrawn to Layer1 normally), this situation is very inconvenient for users, and we will do our best to prevent this from happening.

Having said that, we do not want and will not always use the form of whitelist, we prefer the Token cross-chain method without permission. So we put forward a plan (not the final conclusion), and the plan will be iterated based on everyone's feedback.

We plan to maintain the whitelist for the next six weeks (until October 22nd), after which it will open and default any unbridged assets to standard ERC-20 tokens. Previously, we had spent several months communicating with various projects during the stage of developers developing the mainnet. Now, we hope that the extra six weeks will allow the project to determine if Custom Functionality is needed and implement all necessary operations. Again, we actively accept community feedback.

As for whether the project needs customized tokens, we need to understand the necessity of tokens such as governance tokens and anchor tokens on Arbitrum. It should be noted that standard ERC-20 contracts cannot be upgraded, and it is very complicated to convert Token from standard ERC-20 to custom ERC-20. Therefore, it makes sense to define the currency classification now.

Please note: If your project Token needs to customize the contract on Arbitrum, please complete the application before October 22, you can click this link (https://developer.offchainlabs.com/docs/bridging_assets#setting-up -your-token-with-the-generic-custom-gateway) To view the documentation on custom Token, click this link (https://github.com/OffchainLabs/arbitrum/blob/master/packages/arb-bridge-peripherals /contracts/tokenbridge/arbitrum/StandardArbERC20.sol) View documents about standard Token. Alternatively, you are more than welcome to contact us directly via the form (https://docs.google.com/forms/d/e/1FAIpQLSdXUaQeICSD3ulakR2JL0gz0SUGQMU9vxDi8kNCiMFJ9JFYEw/viewform).

If your Token needs to be implemented on Arbitrum, it can be directly deployed after October 22 through the bridging function. If you don't want to wait until October 22, you can also apply for a whitelist through the registration form.