* draft: `op-proposer` `DisputeGameFactory` support

* Add `ProposalInterval` option

flag names

* add game type configuration

* @sebastianst: Use `errors.New` over `fmt.Errorf`

* @sebastianst: var name nit

* @sebastianst: l2oo addr ptr consistency

* @sebastianst: error bubble

* @sebastianst: break out nests

* @sebastianst: defer cancel

* lint

* Hide DGF flags

* fix service init