🌉 OmniBridge Extension

Using OmniBridge to bridge ANY ERC20-type token to the xDai chain

The OmniBridge multi-token extension for the Arbitrary Message Bridge between Ethereum and the xDai chain is the simplest way to transfer ANY ERC20/ERC677/ERC827 token to the xDai chain.

An AMB bridge extension is a pair of mediator contracts associated with a specific pair of Arbitrary Message Bridge contracts.

The list of the tokens already bridged through the extension is available here.

A UI is in process. For now you can follow the How to transfer tokens section to perform operations.

By using this extension any user (not only the token contract owner) can transfer tokens from Ethereum to a chain with fast, inexpensive transactions (in this case the xDai chain) without deploying any additional contracts. The specified token amount is locked in the mediator contract, a new token contract is deployed automatically on the xDai chain, and the requested token amount is minted on the xDai chain. The reverse operation burns bridgeable tokens on the xDai chain and unlocks the tokens from the token contract on Ethereum.

More details for the operations to deposit and withdraw tokens are available here.

Lead Architect Alexander Kolotov speaks at EdCon on the Multi-token tool

OmniBridge technical information and extension parameters

Transfer limits

Transfer limits are configured per a particular pair of tokens.

Default limits:

Default limits to transfer assets from Ethereum to the xDai chain:

  • Daily limit: 1'000'000'000'000'000'000 tokens

  • Maximum per transaction: 1'000'000'000 tokens

  • Minimum per transaction: 0.0001 token

Default limits to transfer assets from the xDai chain to Ethereum

  • Daily limit: 1'000'000'000'000'000'000 tokens

  • Maximum per transaction: 1'000'000'000 tokens

  • Minimum per transaction: 1 token

Bridge operation fees

Fees are also configurable per a particular pair of tokens.

Default fees:

  • There are no fees (except gas fees for the originating transaction) to transfer assets from the Ethereum to the xDai chain.

  • The fee to transfer assets (besides gas fees for the originating transaction) from the xDai chain to Ethereum is 0.05%.