# Programming Meter Passport

Meter Passport shares the same programming interface as [Sygma (Chainsafe) Bridge.](https://buildwithsygma.com/)

#### Adding ERC20 token support in existing supported chains:

For adding standard ERC20 tokens to Meter Passport, please submit a Pull Request in Meter Passports token repo: 

{% embed url="<https://github.com/meterio/token-list>" %}
ERC20 Token List Repo
{% endembed %}

ERC20 tokens with special features like transfer tax and burning, please reach out to our team through telegram or discord channel.

#### Generic Message Passing

Meter Passport is the first bridge that supports generic cross chain messaging in production.  [Ampleforth](https://ampleforth.org) team uses Meter Passport for both AMPL token transfers and crosschain rebasing.  Meter Passport is a fork of ChainSafe's Sygma bridge v2.  The generic message-passing interface is the same as the Sygma Bridge.  The details of the generic messaging passing can be found in the Sygma bridge documents.

{% embed url="<https://docs.buildwithsygma.com/architecture/generic>" %}
Sygma Generic Message Passing Docs
{% endembed %}


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