// 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.service;

import "google/api/annotations.proto";
import "google/protobuf/descriptor.proto";
import "google/protobuf/empty.proto";

import "proto/eth/v1/beacon_block.proto";
import "proto/eth/v1/beacon_chain.proto";
import "proto/eth/v2/beacon_block.proto";
import "proto/eth/v2/sync_committee.proto";

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

// Beacon Chain API
//
// The config API endpoints can be used to query the beacon chain state and information. Such as spec, current fork,
// blocks, and the validator spec.
//
// This service is defined in the upstream Ethereum consensus APIs repository (beacon-apis/apis/).
service BeaconChain {
  // Beacon state API related endpoints.

  // GetGenesis retrieves details of the chain's genesis which can be used to identify chain.
  rpc GetGenesis(google.protobuf.Empty) returns (v1.GenesisResponse) {
    option (google.api.http) = { get: "/eth/v1/beacon/genesis" };
  }

  // GetStateRoot calculates HashTreeRoot for state with given 'stateId'. If stateId is root, same value will be returned.
  rpc GetStateRoot(v1.StateRequest) returns (v1.StateRootResponse) {
    option (google.api.http) = {
      get: "/eth/v1/beacon/states/{state_id}/root"
    };
  }

  // GetStateFork returns Fork object for state with given 'stateId'.
  rpc GetStateFork(v1.StateRequest) returns (v1.StateForkResponse) {
    option (google.api.http) = {
      get: "/eth/v1/beacon/states/{state_id}/fork"
    };
  }

  // GetFinalityCheckpoints returns finality checkpoints for state with given 'stateId'. In case finality is
  // not yet achieved, checkpoint should return epoch 0 and ZERO_HASH as root.
  rpc GetFinalityCheckpoints(v1.StateRequest) returns (v1.StateFinalityCheckpointResponse) {
    option (google.api.http) = {
      get: "/eth/v1/beacon/states/{state_id}/finality_checkpoints"
    };
  }

  // ListValidators returns a filterable list of validators with their balance, status and index.
  rpc ListValidators(v1.StateValidatorsRequest) returns (v1.StateValidatorsResponse) {
    option (google.api.http) = {
      get: "/eth/v1/beacon/states/{state_id}/validators"
    };
  }

  // GetValidator returns a validator specified by state and id or public key along with status and balance.
  rpc GetValidator(v1.StateValidatorRequest) returns (v1.StateValidatorResponse) {
    option (google.api.http) = {
      get: "/eth/v1/beacon/states/{state_id}/validators/{validator_id}"
    };
  }

  // ListValidators returns a filterable list of validator balances.
  rpc ListValidatorBalances(v1.ValidatorBalancesRequest) returns (v1.ValidatorBalancesResponse) {
    option (google.api.http) = {
      get: "/eth/v1/beacon/states/{state_id}/validator_balances"
    };
  }

  // ListCommittees retrieves the committees for the given state at the given epoch.
  rpc ListCommittees(v1.StateCommitteesRequest) returns (v1.StateCommitteesResponse) {
    option (google.api.http) = {
      get: "/eth/v1/beacon/states/{state_id}/committees"
    };
  }

  // ListSyncCommittees retrieves the sync committees for the given state at the given epoch.
  rpc ListSyncCommittees(v2.StateSyncCommitteesRequest) returns (v2.StateSyncCommitteesResponse) {
    option (google.api.http) = {
      get: "/eth/v1/beacon/states/{state_id}/sync_committees"
    };
  }

  // Beacon blocks API related endpoints.

  // ListBlockHeaders retrieves block headers matching given query. By default it will fetch current head slot blocks.
  rpc ListBlockHeaders(v1.BlockHeadersRequest) returns (v1.BlockHeadersResponse) {
    option (google.api.http) = {
      get: "/eth/v1/beacon/headers"
    };
  }

  // GetBlockHeader retrieves block header for given block id.
  rpc GetBlockHeader(v1.BlockRequest) returns (v1.BlockHeaderResponse) {
    option (google.api.http) = {
      get: "/eth/v1/beacon/headers/{block_id}"
    };
  }

  // SubmitBlock instructs the beacon node to broadcast a newly signed beacon block to the beacon network, to be
  // included in the beacon chain. The beacon node is not required to validate the signed BeaconBlock, and a successful
  // response (20X) only indicates that the broadcast has been successful. The beacon node is expected to integrate the
  // new block into its state, and therefore validate the block internally, however blocks which fail the validation are
  // still broadcast but a different status code is returned (202).
  rpc SubmitBlock(v1.BeaconBlockContainer) returns (google.protobuf.Empty) {
    option (google.api.http) = {
      post: "/eth/v1/beacon/blocks"
      body: "*"
    };
  }

  // GetBlockRoot retrieves hashTreeRoot of BeaconBlock/BeaconBlockHeader.
  rpc GetBlockRoot(v1.BlockRequest) returns (v1.BlockRootResponse) {
    option (google.api.http) = {
      get: "/eth/v1/beacon/blocks/{block_id}/root"
    };
  }

  // GetBlock retrieves block details for given block id.
  rpc GetBlock(v1.BlockRequest) returns (v1.BlockResponse) {
    option (google.api.http) = {
      get: "/eth/v1/beacon/blocks/{block_id}"
    };
  }

  // GetBlockSSZ returns the SSZ-serialized version of block details for given block id.
  rpc GetBlockSSZ(v1.BlockRequest) returns (v1.BlockSSZResponse) {
    option (google.api.http) = {
      get: "/eth/v1/beacon/blocks/{block_id}/ssz"
    };
  }

  // GetBlockV2 retrieves block details for given block id.
  rpc GetBlockV2(v2.BlockRequestV2) returns (v2.BlockResponseV2) {
    option (google.api.http) = {
      get: "/eth/v2/beacon/blocks/{block_id}"
    };
  }

  // GetBlockSSZV2 returns the SSZ-serialized version of block details for given block id.
  rpc GetBlockSSZV2(v2.BlockRequestV2) returns (v2.BlockSSZResponseV2) {
    option (google.api.http) = {
      get: "/eth/v2/beacon/blocks/{block_id}/ssz"
    };
  }

  // ListBlockAttestations retrieves attestation included in requested block.
  rpc ListBlockAttestations(v1.BlockRequest) returns (v1.BlockAttestationsResponse) {
    option (google.api.http) = {
      get: "/eth/v1/beacon/blocks/{block_id}/attestations"
    };
  }

  // Beacon pools API related endpoints.

  // ListPoolAttestations retrieves attestations known by the node but
  // not necessarily incorporated into any block.
  rpc ListPoolAttestations(v1.AttestationsPoolRequest) returns (v1.AttestationsPoolResponse) {
    option (google.api.http) = {
      get: "/eth/v1/beacon/pool/attestations"
    };
  }

  // SubmitAttestations submits Attestation objects to node. If attestation passes all validation
  // constraints, node MUST publish attestation on appropriate subnet.
  rpc SubmitAttestations(v1.SubmitAttestationsRequest) returns (google.protobuf.Empty) {
    option (google.api.http) = {
      post: "/eth/v1/beacon/pool/attestations"
      body: "*"
    };
  }

  // ListPoolAttesterSlashings retrieves attester slashings known by the node but
  // not necessarily incorporated into any block.
  rpc ListPoolAttesterSlashings(google.protobuf.Empty) returns (v1.AttesterSlashingsPoolResponse) {
    option (google.api.http) = {
      get: "/eth/v1/beacon/pool/attester_slashings"
    };
  }

  // SubmitAttesterSlashing submits AttesterSlashing object to node's pool and
  // if passes validation node MUST broadcast it to network.
  rpc SubmitAttesterSlashing(v1.AttesterSlashing) returns (google.protobuf.Empty) {
    option (google.api.http) = {
      post: "/eth/v1/beacon/pool/attester_slashings"
      body: "*"
    };
  }

  // ListPoolProposerSlashings retrieves proposer slashings known by the node
  // but not necessarily incorporated into any block.
  rpc ListPoolProposerSlashings(google.protobuf.Empty) returns (v1.ProposerSlashingPoolResponse) {
    option (google.api.http) = {
      get: "/eth/v1/beacon/pool/proposer_slashings"
    };
  }

  // SubmitProposerSlashing submits AttesterSlashing object to node's pool and if
  // passes validation node MUST broadcast it to network.
  rpc SubmitProposerSlashing(v1.ProposerSlashing) returns (google.protobuf.Empty) {
    option (google.api.http) = {
      post: "/eth/v1/beacon/pool/proposer_slashings"
      body: "*"
    };
  }

  // ListPoolVoluntaryExits retrieves voluntary exits known by the node but
  // not necessarily incorporated into any block.
  rpc ListPoolVoluntaryExits(google.protobuf.Empty) returns (v1.VoluntaryExitsPoolResponse) {
    option (google.api.http) = {
      get: "/eth/v1/beacon/pool/voluntary_exits"
    };
  }

  // SubmitVoluntaryExit submits SignedVoluntaryExit object to node's pool
  // and if passes validation node MUST broadcast it to network.
  rpc SubmitVoluntaryExit(v1.SignedVoluntaryExit) returns (google.protobuf.Empty) {
    option (google.api.http) = {
      post: "/eth/v1/beacon/pool/voluntary_exits"
      body: "*"
    };
  }

  // Submits sync committee signature objects to the node.
  rpc SubmitPoolSyncCommitteeSignatures(v2.SubmitPoolSyncCommitteeSignatures) returns (google.protobuf.Empty) {
    option (google.api.http) = {
      post: "/eth/v1/beacon/pool/sync_committees"
      body: "*"
    };
  }

  // Beacon config API related endpoints.

  // GetForkSchedule retrieve all scheduled upcoming forks this node is aware of.
  rpc GetForkSchedule(google.protobuf.Empty) returns (v1.ForkScheduleResponse) {
    option (google.api.http) = {get: "/eth/v1/config/fork_schedule"};
  }

  // Spec retrieves specification configuration (without Phase 1 params) used on this node. Specification params list
  // Values are returned with following format:
  // - any value starting with 0x in the spec is returned as a hex string
  // - all other values are returned as number
  rpc GetSpec(google.protobuf.Empty) returns (v1.SpecResponse) {
    option (google.api.http) = {get: "/eth/v1/config/spec"};
  }

  // GetDepositContract retrieves deposit contract address and genesis fork version.
  rpc GetDepositContract(google.protobuf.Empty) returns (v1.DepositContractResponse) {
    option (google.api.http) = {get: "/eth/v1/config/deposit_contract"};
  }
}