// SPDX-License-Identifier: MIT
pragma solidity ^0.8.8;

type RequestId is bytes32;
type SlotId is bytes32;

struct Request {
  address client;
  Ask ask;
  Content content;
  uint256 expiry; // time at which this request expires
  bytes32 nonce; // random nonce to differentiate between similar requests
}

struct Ask {
  uint64 slots; // the number of requested slots
  uint256 slotSize; // amount of storage per slot (in number of bytes)
  uint256 duration; // how long content should be stored (in seconds)
  uint256 proofProbability; // how often storage proofs are required
  uint256 reward; // amount of tokens paid per second per slot to hosts
  uint64 maxSlotLoss; // Max slots that can be lost without data considered to be lost
}

struct Content {
  string cid; // content id (if part of a larger set, the chunk cid)
  Erasure erasure; // Erasure coding attributes
  PoR por; // Proof of Retrievability parameters
}

struct Erasure {
  uint64 totalChunks; // the total number of chunks in the larger data set
}

struct PoR {
  bytes u; // parameters u_1..u_s
  bytes publicKey; // public key
  bytes name; // random name
}