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
NFT OmniBridge extension
ERC20-to-ERC20 extension linked with a particular token
Transfers with covered gas fees
BSC-xDai AMB
About the BSC-xDai AMB
OmniBridge Extension
Manual tokens transfer (No UI)
Transfer WBNB on xDai to BNB on BSC
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
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OmniBridge Extension
Full duplex bridge for ERC20-based tokens between BSC and xDai
The OmniBridge multi-token extension for the Arbitrary Message Bridge between the Binance Smart Chain and the xDai chain is the simplest way to transfer ANY ERC20/ERC677/ERC827 token to and from the xDai chain.
By using this extension any user (not only the token contract owner) can transfer tokens in both directions: from BSC to xDai and from the xDai chain to BSC with fast, inexpensive transactions and without deploying any additional contracts.
The specified token amount is locked in the mediator contract, a new token contract is deployed automatically on the BSC/xDai chain, and the requested token amount is minted on the xDai/BSC chain. The reverse operation burns bridged tokens on the xDai/BSC chain and unlocks the tokens from the token contract on another side of the bridge.
Note that tokens are appended with the name of the originating chain "from Ethereum" or "from xDai" when bridging. This can result in names such as "STAKE on xDai on BSC" if tokens have been bridged from Ethereum to xDai and then to BSC for example.

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: 10'000'000'001 tokens
  • Maximum per transaction: 10'000'000'000 tokens
  • Minimum per transaction: 0.0001 token
Default limits to transfer assets from the xDai chain to Ethereum
  • Daily limit: 10'000'000'001 tokens
  • Maximum per transaction: 10'000'000'000 tokens
  • Minimum per transaction: 0.0001 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 BSC to the xDai chain.
  • The fee to transfer assets (besides gas fees for the originating transaction) from the xDai chain to BSC is 0.1%.
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Contents
OmniBridge technical information and extension parameters
Transfer limits
Bridge operation fees