// Copyright 2020 Prysmatic Labs.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
syntax = "proto3";

package ethereum.eth.v1;

import "google/protobuf/descriptor.proto";

import "proto/eth/ext/options.proto";
import "proto/eth/v1/attestation.proto";
import "proto/eth/v1/beacon_block.proto";
import "proto/eth/v1/validator.proto";

option csharp_namespace = "Ethereum.Eth.V1";
option go_package = "github.com/prysmaticlabs/prysm/proto/eth/v1";
option java_multiple_files = true;
option java_outer_classname = "BeaconStateProto";
option java_package = "org.ethereum.eth.v1";
option php_namespace = "Ethereum\\Eth\\v1";

message BeaconState {
  // Versioning [1001-2000]
  uint64 genesis_time = 1001;
  bytes genesis_validators_root = 1002 [(ethereum.eth.ext.ssz_size) = "32"];
  uint64 slot = 1003 [(ethereum.eth.ext.cast_type) = "github.com/prysmaticlabs/eth2-types.Slot"];
  Fork fork = 1004;

  // History [2001-3000]
  BeaconBlockHeader latest_block_header = 2001;
  repeated bytes block_roots = 2002 [(ethereum.eth.ext.ssz_size) = "block_roots.size"];
  repeated bytes state_roots = 2003 [(ethereum.eth.ext.ssz_size) = "state_roots.size"];
  repeated bytes historical_roots = 2004 [(ethereum.eth.ext.ssz_size) = "?,32", (ethereum.eth.ext.ssz_max) = "16777216"];

  // Eth1 [3001-4000]
  Eth1Data eth1_data = 3001;
  repeated Eth1Data eth1_data_votes = 3002 [(ethereum.eth.ext.ssz_max) = "eth1_data_votes.size"];
  uint64 eth1_deposit_index = 3003;

  // Registry [4001-5000]
  repeated Validator validators = 4001 [(ethereum.eth.ext.ssz_max) = "1099511627776"];
  repeated uint64 balances = 4002 [(ethereum.eth.ext.ssz_max) = "1099511627776"];

  // Randomness [5001-6000]
  repeated bytes randao_mixes = 5001 [(ethereum.eth.ext.ssz_size) = "randao_mixes.size"];

  // Slashings [6001-7000]
  repeated uint64 slashings = 6001 [(ethereum.eth.ext.ssz_size) = "slashings.size"];

  // Attestations [7001-8000]
  repeated PendingAttestation previous_epoch_attestations = 7001 [(ethereum.eth.ext.ssz_max) = "previous_epoch_attestations.max"];
  repeated PendingAttestation current_epoch_attestations = 7002 [(ethereum.eth.ext.ssz_max) = "current_epoch_attestations.max"];

  // Finality [8001-9000]
  // Spec type [4]Bitvector which means this would be a fixed size of 4 bits.
  bytes justification_bits = 8001 [(ethereum.eth.ext.ssz_size) = "1", (ethereum.eth.ext.cast_type) = "github.com/prysmaticlabs/go-bitfield.Bitvector4"];
  Checkpoint previous_justified_checkpoint = 8002;
  Checkpoint current_justified_checkpoint = 8003;
  Checkpoint finalized_checkpoint = 8004;
}

message PendingAttestation {
  // Bitfield representation of validator indices that have voted exactly
  // the same vote and have been aggregated into this attestation.
  bytes aggregation_bits = 1 [(ethereum.eth.ext.ssz_max) = "2048", (ethereum.eth.ext.cast_type) = "github.com/prysmaticlabs/go-bitfield.Bitlist"];
  AttestationData data = 2;
  // The difference of when attestation gets created and get included on chain.
  uint64 inclusion_delay = 3 [(ethereum.eth.ext.cast_type) = "github.com/prysmaticlabs/eth2-types.Slot"];
  // The proposer who included the attestation in the block.
  uint64 proposer_index = 4 [(ethereum.eth.ext.cast_type) = "github.com/prysmaticlabs/eth2-types.ValidatorIndex"];
}

message Committee {
  uint64 index = 1 [(ethereum.eth.ext.cast_type) = "github.com/prysmaticlabs/eth2-types.CommitteeIndex"];
  uint64 slot = 2 [(ethereum.eth.ext.cast_type) = "github.com/prysmaticlabs/eth2-types.Slot"];
  repeated uint64 validators = 3 [(ethereum.eth.ext.cast_type) = "github.com/prysmaticlabs/eth2-types.ValidatorIndex"];
}

// Fork structure used for indicating beacon chain versioning and forks.
message Fork {
  bytes previous_version = 1 [(ethereum.eth.ext.ssz_size) = "4"];
  bytes current_version = 2 [(ethereum.eth.ext.ssz_size) = "4"];
  uint64 epoch = 3 [(ethereum.eth.ext.cast_type) = "github.com/prysmaticlabs/eth2-types.Epoch"];
}

message ForkChoiceHeadsResponse {
  repeated ForkChoiceHead data = 1;
}

message ForkChoiceHead {
  bytes root = 1 [(ethereum.eth.ext.ssz_size) = "32"];
  uint64 slot = 2 [(ethereum.eth.ext.cast_type) = "github.com/prysmaticlabs/eth2-types.Slot"];
}

message BeaconStateResponse {
  BeaconState data = 1;
}

message BeaconStateSSZResponse {
  bytes data = 1;
}
