Conversation.v1 constructor

*[<Null safety>](https://dart.dev/null-safety)*

Conversation.v1(DateTime createdAt, {required EthereumAddress me, required EthereumAddress peer})

Implementation

Conversation.v1(
  this.createdAt, {
  required this.me,
  required this.peer,
})  : version = xmtp.Message_Version.v1,
      topic = Topic.directMessageV1(me.hex, peer.hex),
      conversationId = "",
      metadata = <String, String>{},
      invite = xmtp.InvitationV1();