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Hub20 is a very-early stage open source, self-hosted online payment solution that can be considered as the Ethereum equivalent of BTCPayServer payment gateway, allowing users to collect payments in Ethereum and any ERC20 token.

Hub20 also provides integration with Raiden, so that if you have a node running you should be able to accept and send payments of ERC20 tokens with near-zero fees.

The possiblity of having low-fee payments, irreversibility of transactions and the usage of stablecoins such as DAI make hub20 a very compelling offer for anyone that wants to receive payments online.

Hub20 also allows users sending their tokens to either other users of the hub as well as to any ethereum address, effectively turning any deployment of a hub20 server into an exclusive Paypal/Venmo/cryptobank for its users.

This works because hub20 offers the possibility of using custodial wallets for managing its funds. While this is not ideal for large deployments such as companies and crypto exchanges, for a self-hosted service this is more acceptable because the node operator is the one effectively controlling the wallets and therefore its keys.

This also opens the possibility for, e.g, enthusiasts to set up a hub20 node for their non-technical friends and family (i.e, people that are within their circle of trust) so that they can have an easy way to do transactions in cryptocurrency without ever having to deal with anything that hinders adoption: nothing to learn about wallets, no access to exchanges needed, no KYC, etc.

Hub20 is designed to work as a bridge between the "traditional" web and the growing-but-still-challenging web3 and decentralized apps based on the Ethereum blockchain. Hub Administrators can choose how much they want to pick from each "side" of the tech stack that is more suited to their needs. Want to create a hub that can authenticate with your company's LDAP or do you prefer to use ethereum account ownership for authentication? They are both just a configuration setting away.

• Documentation
• Frontend application is available and can connect to any backend server available on the internet. Use https://demo.hub20.io as a test instance that we provide, connected to Goerli testnet.

If you are a developer and would like to contribute, don't hesitate to get in touch. Any contribution is more than welcome. We are using Zenhub to keep track of ongoing work and plan milestones.

The project is made up of different components:

• The backend code provides an API and does all the interfacing with the blockchain and the underlying Raiden node. This is available under the Affero GNU Public License v3
• The web application that works as the frontend and the base javascript library are MIT-licensed

Hub20 development started thanks to a grant awarded by the Raiden Trust. If you'd like to support the project, please visit our sponsors page