TokenBridge
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Welcome
About TokenBridge
Features, Definitions and Modes
Components
Use Cases
Security Audits
Roadmap
Arbitrary Message Bridge (AMB)
About the AMB
Arbitrary Message Bridge Deployment
Development of a cross-chain application
ERC677 to ERC677 AMB bridge extension
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CryptoKitties AMB bridge extension Demo
Create a Burner Wallet plugin for your AMB bridge extension
xDai Bridge
About the xDai Bridge
Using the xDai Bridge
xDai Bridge Contracts Management
xDai Bridge oracle maintenance
Trial bridge
ETH-XDAI AMB
About the ETH-xDai AMB
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OmniBridge Extension
OmniBridge UI
Transfer tokens manually
Transfer WETH from xDai to ETH on Mainnet
New token contract verification in BlockScout
Corresponding token contract addresses (ETH - XDAI)
Get status of the OmniBridge deposit
OmniBridge Extension internals & diagrams
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Bridged Tokens List
NFT OmniBridge extension
ERC20-to-ERC20 extension linked with a particular token
BSC-xDai AMB
About the BSC-xDai AMB
OmniBridge Extension
RINKEBY-XDAI AMB
About the Rinkeby-xDai AMB
AMB Live Monitoring application
MOON bridge extension
BRICK bridge extension
NFT OmniBridge extension
POA-XDAI AMB
About the POA-xDai AMB
OmniBridge Extension
Kovan-Sokol AMB
About the Kovan-Sokol AMB
OmniBridge extension (testing)
NFT extension (testing)
Native-to-ERC20 bridge extension
ETH-BSC AMB
About the ETH-BSC AMB
OmniBridge Extension
ETH-POA AMB
About the ETH-POA AMB
ETH-ETC AMB
About the ETH-ETC AMB
WETC AMB extension
ETH-QDAI AMB
About the qDai chain
About the ETH-qDai AMB
qDai bridge extension
Using the qDai Bridge
ETH-BNC Bridge
About ETH-BNC bridge
Demo: ETH-BNC bridge
Creating a Local Binance DEX Testnet
Media
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Media Kit
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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.
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.​
General FAQs are located here: https://www.xdaichain.com/about-xdai/faqs/bridges-xdai-bridge-and-omnibridge​
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 0.1%.
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Contents
OmniBridge technical information and extension parameters
Transfer limits
Bridge operation fees