Settings.cs

using MaticNetwork.Net;

public static class Settings
{
    public static string MATIC_PROVIDER = "https://testnet2.matic.network"; // This is the MATIC testnet RPC
    public static string PARENT_PROVIDER = "https://ropsten.infura.io/v3/70645f042c3a409599c60f96f6dd9fbc"; // This is the Ropsten testnet RPC
    public static string ROOTCHAIN_ADDRESS = "0x60e2b19b9a87a3f37827f2c8c8306be718a5f9b4"; // The address for the main Plasma contract in  Ropsten testnet
    public static string WITHDRAWMANAGER_ADDRESS = "0x4ef2b60cdd4611fa0bc815792acc14de4c158d22"; // An address for the WithdrawManager contract on Ropsten testnet
    public static string DEPOSITMANAGER_ADDRESS = "0x4072fab2a132bf98207cbfcd2c341adb904a67e9";  // An address for a DepositManager contract in Ropsten testnet
    public static string SYNCER_URL = "https://matic-syncer2.api.matic.network/api/v1"; // Backend service which syncs the Matic sidechain state to a MySQL database which we use for faster querying. This comes in handy especially for constructing withdrawal proofs while exiting assets from Plasma.
    public static string WATCHER_URL = "https://ropsten-watcher2.api.matic.network/api/v1"; // Backend service which syncs the Matic Plasma contract events on Ethereum mainchain to a MySQL database which we use for faster querying. This comes in handy especially for listening to asset deposits on the Plasma contract.
    public static string ROOTWETH_ADDRESS = "0x421dc9053cb4b51a7ec07b60c2bbb3ec3cfe050b";  // This is a wrapped ETH ERC20 contract address so that we can support ETH deposits to the sidechain
    public static string MATICWETH_ADDRESS = "0x31074c34a757a4b9FC45169C58068F43B717b2D0"; // The corresponding wrapped ETH ERC20 contract address on the Matic chain
    public static string PRIVATE_KEY = "<paste your private key here>"; // A sample private key prefix with `0x`
    public static string FROM_ADDRESS = "<paste address belonging to private key here>";// Your address
    public static string TO_ADDRESS = "<paste address to transfer tokens>";// receipent address
    public static string ROPSTEN_TEST_TOKEN = "0x70459e550254b9d3520a56ee95b78ee4f2dbd846"; // Contract for ERC20 in Ropsten
    public static string MATIC_TEST_TOKEN = "0xc82c13004c06E4c627cF2518612A55CE7a3Db699"; // Contract for ERC20 in Matic testnet
    public static string ROPSTEN_ERC721_TOKEN = "0x07d799252cf13c01f602779b4dce24f4e5b08bbd"; // Contract for ERC721 in Ropsten testnet
    public static string MATIC_ERC721_TOKEN = "0x9f289a264b6db56d69ad53f363d06326b984e637"; // Contract for ERC721 in matic testnet

    public static IMatic matic = null;

    public static IMatic GetMatic()
    {
        if (matic == null) {
            matic = new Matic(Settings.MATIC_PROVIDER, Settings.PARENT_PROVIDER, Settings.SYNCER_URL, Settings.WATCHER_URL, Settings.ROOTCHAIN_ADDRESS, Settings.MATICWETH_ADDRESS, Settings.WITHDRAWMANAGER_ADDRESS, Settings.DEPOSITMANAGER_ADDRESS);
                    matic.SetPrivateKey(Settings.PRIVATE_KEY);
        }
        return matic;
    }

}