Forwarder Contract

Mayan Forwarder serves as the entry point for interacting with our set of smart contracts, providing a unified interface to all three cross-chain swap methods: WH Swap, MCTP, and Swift.

The Forwarder maintains a whitelist of protocol addresses that user can interact with to ensure safetey of user in case of receiving a comporomised quote from API.

The Forwarder smart contract is deployed on the following EVM networks with address: 0x0654874eb7F59C6f5b39931FC45dC45337c967c3

• Ethereum

• Arbitrum

• Base

• Optimism

• Avalanche

• Polygon

• BSC

Swap From EVM

To initiate a swap with an ERC20 token as input token you should first approve the required allowance to the forwarder contract or alternatively pass permit object to the contract.

tokenContract.approve(forwarderContract, amountIn);

Once you approved the spending amount, you can get the complete transaction payload by using getSwapFromEvmTxPayload from SDK and then pass it to the Forwarder contract.

If you need to build the payload manually and use Mayan Forwarder, you should choose the right method based on your input token:

• forwardERC20: Your input token is ERC20

Parameter	Type	Descrption
tokenIn	address	Input token address
amountIn	uint256	Input amount
permitParams	PermitParams	Signed permission (eip-2612) Pass zero for all values if you don't want to use
mayanProtocol	address	Address of Mayan final contract
protocolData	bytes	Bytes data for Mayan final contract

• swapAndForwardERC20: Similar to forwardERC20 but you also need a swap in source chain before the actual bridging.

Parameter	Type	Description
tokenIn	address	Input token address
amountIn	uint256	Input amount
permitParams	PermitParams	Signed permission (eip-2612) Pass zero for all values if you don't want to use
swapProtocol	address	Contract address of swap protocol (e.g 1inch)
swapData	bytes	Bytes data that is needed by swap protocol
middleToken	address	The output token of swap protocol
minMiddleAmount	uint256	Minimum output of swap step or the transaction will revert
mayanProtocol	address	Address of Mayan final contract
mayanData	bytes	Bytes data for Mayan final contract

• forwardEth: Your input token is the native token of chain

Parameter	Type	Description
mayanProtocol	address	Address of Mayan final contract
mayanData	bytes	Bytes data for Mayan final contract

• swapAndForwardEth: Similar to forwardEth but you need a swap before the actual bridging.

Parameter	Type	Description
amountIn	unit256	Input amount of native token
swapProtocol	address	Contract address of swap protocol (e.g 1inch)
swapData	bytes	Data that is needed by swap protocol
middleToken	address	The output token of swap protocol
minMiddleAmount	uint256	Minimum output of swap step or the transaction will revert
mayanProtocol	address	Address of Mayan final contract
mayanData	address	Bytes data for Mayan final contract