Testnet-Details

curl --location 'https://testnet-rpc.plasma.to' --header 'Content-Type: application/json' --data '{"method":"eth_blockNumber","params":[],"id":1,"jsonrpc":"2.0"}'

{"jsonrpc":"2.0","id":1,"result":"0x9f61b"}

// hardhat.config.js
module.exports = {
  networks: {
    plasmaTestnet: {
      url: "https://testnet-rpc.plasma.to",
      chainId: 9746,
      accounts: [process.env.PRIVATE_KEY]
    }
  }
};

// truffle-config.js
module.exports = {
  networks: {
    plasmaTestnet: {
      provider: () => new HDWalletProvider(MNEMONIC,
        "https://testnet-rpc.plasma.to"),
      network_id: 9746,
      gas: 5500000,
      confirmations: 2,
      timeoutBlocks: 200,
      skipDryRun: true
    }
  }
};