syntax = "proto3";

package bc;

message Hash {
  fixed64 v0 = 1;
  fixed64 v1 = 2;
  fixed64 v2 = 3;
  fixed64 v3 = 4;
}

message Program {
  uint64 vm_version = 1;
  bytes  code       = 2;
}

// This message type duplicates Hash, above. One alternative is to
// embed a Hash inside an AssetID. But it's useful for AssetID to be
// plain old data (without pointers). Another alternative is use Hash
// in any protobuf types where an AssetID is called for, but it's
// preferable to have type safety.
message AssetID {
  fixed64 v0 = 1;
  fixed64 v1 = 2;
  fixed64 v2 = 3;
  fixed64 v3 = 4;
}

message AssetAmount {
  AssetID asset_id = 1;
  uint64  amount   = 2;
}

message AssetDefinition {
  Hash    initial_block_id = 1;
  Program issuance_program = 2;
  Hash    data             = 3;
}

message ValueSource {
  Hash        ref      = 1;
  AssetAmount value    = 2;
  uint64      position = 3;
}

message ValueDestination {
  Hash        ref      = 1;
  AssetAmount value    = 2;
  uint64      position = 3;
}

message BlockHeader {
  uint64 version                   = 1;
  uint64 serialized_size           = 2;
  uint64 height                    = 3;
  Hash   previous_block_id         = 4;
  uint64 timestamp_ms              = 5;
  Hash   transactions_root         = 6;
  Hash   assets_root               = 7;
  uint64 nonce                     = 8;
  uint64 bits                      = 9;
}

message TxHeader {
  uint64        version         = 1;
  uint64        serialized_size = 2;
  repeated Hash result_ids      = 3;
  Hash          data            = 4;
  uint64        min_time_ms.    = 5;
  uint64        max_time_ms.    = 6;
  Hash          ext_hash        = 7;
}

message Mux {
  repeated ValueSource      sources              = 1; // issuances, spends, and muxes
  Program                   program              = 2;
  Hash                      ext_hash             = 3;
  repeated ValueDestination witness_destinations = 4; // outputs, retirements, and muxes
  repeated bytes            witness_arguments    = 5;
}

message Nonce {
  Program        program             = 1;
  Hash           ext_hash            = 2;
  repeated bytes witness_arguments   = 3;
  Hash           witness_anchored_id = 4;
}

message Coinbase {
  ValueDestination witness_destination = 1;
}

message Output {
  ValueSource source          = 1;
  Program     control_program = 2;
  Hash        data            = 3;
  Hash        ext_hash        = 4;
  uint64      ordinal         = 5;
}

message Retirement {
  ValueSource source   = 1;
  Hash        data     = 2;
  Hash        ext_hash = 3;
  uint64      ordinal  = 4;
}

message Issuance {
  Hash             anchor_id                = 1;
  AssetAmount      value                    = 2;
  Hash             data                     = 3;
  Hash             ext_hash                 = 4;
  ValueDestination witness_destination      = 5;
  AssetDefinition  witness_asset_definition = 6;
  repeated bytes   witness_arguments        = 7;
  Hash             witness_anchored_id      = 8;
  uint64           ordinal                  = 9;
}

message Spend {
  Hash             spent_output_id     = 1;
  Hash             data                = 2;
  Hash             ext_hash            = 3;
  ValueDestination witness_destination = 4;
  repeated bytes   witness_arguments   = 5;
  Hash             witness_anchored_id = 6;
  uint64           ordinal             = 7;
}