upkeepCreator.sol

// SPDX-License-Identifier: GPL-3.0

pragma solidity >=0.7.0 <0.9.0;

import "@chainlink/contracts/src/v0.8/interfaces/KeeperCompatibleInterface.sol";

interface ILinkToken {
    function transferAndCall(address receiver, uint amount, bytes calldata data) external returns (bool success);
    function balanceOf(address user) external view returns(uint);
    function approve(address spender, uint amount) external;
    function transfer(address _to, uint _amount) external;
}

interface KeepersRegistry {
    function getRegistrar() external view returns(address);
}

contract UpkeepCreator {
    address public REGISTRY_ADDRESS = 0x4Cb093f226983713164A62138C3F718A5b595F73; //Kovan testnet 
    address public ERC677_LINK_ADDRESS = 0xa36085F69e2889c224210F603D836748e7dC0088; //Kovan testnet (LINK addresses: https://docs.chain.link/docs/link-token-contracts/)
    /*
    register(
        string memory name,
        bytes calldata encryptedEmail,
        address upkeepContract,
        uint32 gasLimit,
        address adminAddress,
        bytes calldata checkData,
        uint96 amount,
        uint8 source
    )
    */
    bytes4 private constant FUNC_SELECTOR = bytes4(keccak256("register(string,bytes,address,uint32,address,bytes,uint96,uint8)"));
    uint public minFundingAmount = 5000000000000000000; //5 LINK
    uint8 public SOURCE = 110;

    ILinkToken ERC677Link = ILinkToken(ERC677_LINK_ADDRESS);

    //Note: make sure to fund this contract with LINK before calling createUpkeep
    function createUpkeep(address contractAddressToAutomate, string memory upkeepName, uint32 gasLimit) external {
        address registarAddress = KeepersRegistry(REGISTRY_ADDRESS).getRegistrar();
        uint96 amount = uint96(minFundingAmount);
        bytes memory data = abi.encodeWithSelector(FUNC_SELECTOR, upkeepName, hex"", contractAddressToAutomate, gasLimit, msg.sender, hex"", amount, SOURCE);
        ERC677Link.transferAndCall(registarAddress, minFundingAmount, data);
    }

}