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IERC165 OFT Interface Ids

Use these interface ids to determine which version of OFT is deployed.

OFT(v1): 0x14e4ceea
OFTV2: 0x1f7ecdf7
OFTWithFee: 0x6984a9e8
interface ERC165 {
    /// @notice Query if a contract implements an interface
    /// @param interfaceID The interface identifier, as specified in ERC-165
    /// @dev Interface identification is specified in ERC-165. This function
    ///  uses less than 30,000 gas.
    /// @return `true` if the contract implements `interfaceID` and
    ///  `interfaceID` is not 0xffffffff, `false` otherwise
    function supportsInterface(bytes4 interfaceID) external view returns (bool);
}
Example Hardhat Task
module.exports = async function (taskArgs) {
    const OFTInterfaceId = 0x14e4ceea;
    const OFTV2InterfaceId = 0x1f7ecdf7;
    const OFTWithFeeInterfaceId = 0x6984a9e8;
​
    const ERC165ABI = [
        "function supportsInterface(bytes4) public view returns (bool)"
    ];
​
    try {
        const contract = await ethers.getContractAt(ERC165ABI, taskArgs.address);
        const isOFT = await contract.supportsInterface(OFTInterfaceId);
        const isOFTV2 = await contract.supportsInterface(OFTV2InterfaceId);
        const isOFTWithFee = await contract.supportsInterface(OFTWithFeeInterfaceId);
​
        if(isOFT) {
            console.log(`address: ${taskArgs.address} is OFT(v1)`)
        } else if(isOFTV2) {
            console.log(`address: ${taskArgs.address} is OFTV2`)
        } else if(isOFTWithFee) {
            console.log(`address: ${taskArgs.address} is OFTWithFee`)
        } else {
            console.log(`address: ${taskArgs.address} is not an OFT`)
        }
    } catch (e) {
        console.log("supportsInterface not implemented")
    }
}

OFT (V1) vs OFTV2 - Which should I use?

ONFT

Last modified 3d ago

IERC165 OFT Interface Ids

OFT(v1): `0x14e4ceea`

OFTV2: `0x1f7ecdf7`

OFTWithFee: `0x6984a9e8`

Example Hardhat Task