import chronos, results

import logos_delivery/api/types as api_types
import logos_delivery/channels/types as channel_types

export api_types, channel_types

# Structural API contract for the reliable-channel surface (ops in `channels/api/*`).
type ReliableChannelApi* = concept c
  createReliableChannel(
    c, channelId = ChannelId, contentTopic = ContentTopic, senderId = SdsParticipantID
  ) is Result[ChannelId, string]
  channelExists(c, channelId = ChannelId) is bool
  closeChannel(c, channelId = ChannelId) is Future[Result[void, string]]
  send(c, channelId = ChannelId, appPayload = seq[byte]) is
    Future[Result[RequestId, string]]