CAKE 跨链

PancakeSwap uses LayerZero OFT for Cross Chain CAKE Bridging

Contract info

CAKE Bridging Contract

Contract name: CakeProxyOFT Contract address: 0xb274202daBA6AE180c665B4fbE59857b7c3a8091

View on BscScan

Example of CAKE bridging to Aptos

sendFrom

    function sendFrom(address _from, uint16 _dstChainId, bytes32 _toAddress, uint _amount, uint _minAmount, LzCallParams calldata _callParams) external payable;

Name	Type	Description
_from	address	From address. This should be the address calling the CakeProxyOFT
_dstChainId	uint16	108 for Aptos mainnet
_toAddress	bytes32	The destination address on Aptos
_amount	uint256	Amount of CAKE in WEI. Please note that amounts less than 1e-8 will get dusted
_minAmount	uint256	Minimum receiving amount. We do not charge any fee in CAKE. But this should not be larger than _amount after being rounded down to 8 decimals.
_callParams	tuple	A set of call parameters used to define bridging behaviours. Continue reading for more detail.

sendFrom is a payable function. You will need to pay around 0.005-0.01 in BNB for destination airdrop gas fees. This value will vary based on the price of BNB/APT.

Please note that if you define extra gas being airdropped to your destination address, you will need to increase this number or tx will revert with not enough natives for fees

How to form `_callParams`

{
    refundAddress,
    zroPaymentAddress,
    adapterParams
}

Name	Type	Description
refundAddress	address	Excess fee (BNB) will be returned to this address
zroPaymentAddress	address	0x0000000000000000000000000000000000000000
adapterParams	bytes	A set of parameters to define destination gas airdropping. Continue reading for more detail.

How to form `adapterParams`

{
    version,
    dstGasLimit,
    dstNativeGasTransferAmount,
    dstNativeGasTransferAddress
}

Name	Type	Description
version	uint16	Default is 2
dstGasLimit	uint	Default is 200000
dstNativeGasTransferAmount	uint	Amount destination native gas token to airdrop. Use 0 if you don't need the bridge to convert BNB and airdrop you APT
dstNativeGasTransferAddress	bytes	The destination address that receives native gas tokens on destination chain

const adapterParams = utils.solidityPack(
    ["uint16", "uint", "uint", "bytes"],
    [2, 200000, 0, "0xYourAptosAddress"]
)

Utilities

• GUI - CAKE - Aptos PancakeBridge

• LayerZeroScan - track your crosschain txs

• LayerZero Docs

Audits

OtterSec's PancakeSwap CAKE OFT (Bridging) security audit