validate method

Chain validate()

asserts that ethRpcUrl and bundlerUrl is provided

Implementation

Chain validate() {
  require(ethRpcUrl != null && ethRpcUrl!.isNotEmpty,
      "Chain: please provide a valid eth rpc url");
  require(bundlerUrl != null && bundlerUrl!.isNotEmpty,
      "Chain: please provide a valid bundler url");
  return this;
}