// adapted from https://github.com/ipfs/boxo/blob/main/bitswap/message/pb/message.proto
syntax = "proto3";

enum WantType {
  WantBlock = 0;                        // send me the block for the CID
  WantHave = 1;                         // just tell me if you have the block for the CID or send it if it's really small
}

message WantlistEntry {
  bytes cid = 1;                        // the block cid (cidV0 in bitswap 1.0.0, cidV1 in bitswap 1.1.0)
  int32 priority = 2;                   // the priority (normalized). default to 1
  optional bool cancel = 3;             // whether this revokes an entry
  optional WantType wantType = 4;       // Note: defaults to enum 0, ie Block
  optional bool sendDontHave = 5;       // Note: defaults to false
}

message Wantlist {
  repeated WantlistEntry entries = 1;  // a list of wantlist entries
  optional bool full = 2;              // whether this is the full wantlist. default to false
}

message Block {
  bytes prefix = 1;                    // CID prefix (cid version, multicodec and multihash prefix (type + length)
  bytes data = 2;
}

enum BlockPresenceType {
  HaveBlock = 0;
  DontHaveBlock = 1;
}

message BlockPresence {
  bytes cid = 1;
  BlockPresenceType type = 2;
}

message BitswapMessage {
  Wantlist wantlist = 1;
  repeated Block blocks = 3;            // used to send Blocks in bitswap 1.1.0
  repeated BlockPresence blockPresences = 4;
  int32 pendingBytes = 5;
}