// 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.v1alpha1;

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

import "proto/eth/ext/options.proto";

option csharp_namespace = "Ethereum.Eth.v1alpha1";
option go_package = "github.com/prysmaticlabs/prysm/proto/prysm/v1alpha1;eth";
option java_multiple_files = true;
option java_outer_classname = "NodeProto";
option java_package = "org.ethereum.eth.v1alpha1";
option php_namespace = "Ethereum\\Eth\\v1alpha1";

// Node service API
//
// Node service provides general information about the node itself, the services
// it supports, chain information and node version.
service Node {
    // Retrieve the current network sync status of the node.
	rpc GetSyncStatus(google.protobuf.Empty) returns (SyncStatus) {
        option (google.api.http) = {
            get: "/eth/v1alpha1/node/syncing"
        };
    }

    // Retrieve information about the genesis of Ethereum proof of stake.
    rpc GetGenesis(google.protobuf.Empty) returns (Genesis) {
        option (google.api.http) = {
            get: "/eth/v1alpha1/node/genesis"
        };
    }

    // Retrieve information about the running Ethereum Beacon Node.
    rpc GetVersion(google.protobuf.Empty) returns (Version) {
        option (google.api.http) = {
            get: "/eth/v1alpha1/node/version"
        };
    }

    // Retrieve the list of services implemented and enabled by this node.
    //
    // Any service not present in this list may return UNIMPLEMENTED or
    // PERMISSION_DENIED. The server may also support fetching services by grpc
    // reflection.
    rpc ListImplementedServices(google.protobuf.Empty) returns (ImplementedServices) {
        option (google.api.http) = {
            get: "/eth/v1alpha1/node/services"
        };
    }

    // Retrieves the peer data of the local peer.
    rpc GetHost(google.protobuf.Empty) returns (HostData) {
        option (google.api.http) = {
            get: "/eth/v1alpha1/node/p2p"
        };
    }

    // Retrieve the peer corresponding to the provided peer id.
    rpc GetPeer(PeerRequest) returns (Peer) {
        option (google.api.http) = {
            get: "/eth/v1alpha1/node/peer"
        };
    }

    // Retrieve the list of peers currently connected to this node.
    rpc ListPeers(google.protobuf.Empty) returns (Peers) {
        option (google.api.http) = {
            get: "/eth/v1alpha1/node/peers"
        };
    }

    // // Retrieve the status of the ETH1 connections.
    rpc GetETH1ConnectionStatus(google.protobuf.Empty) returns (ETH1ConnectionStatus) {
        option (google.api.http) = {
            get: "/eth/v1alpha1/node/eth1/connections"
        };
    }
}

// Information about the current network sync status of the node.
message SyncStatus {
    // Whether or not the node is currently syncing.
    bool syncing = 1;
}

// Information about the genesis of Ethereum proof of stake.
message Genesis {
    // UTC time specified in the chain start event in the deposit contract.
    google.protobuf.Timestamp genesis_time = 1;

    // Address of the deposit contract in the Ethereum 1 chain.
    bytes deposit_contract_address = 2;

    // Root of the genesis validators deposits; used for domain separation
    // when signing data structures for this chain.
    bytes genesis_validators_root = 3 [(ethereum.eth.ext.ssz_size) = "32"];
}

// Information about the node version.
message Version {
    // A string that uniquely identifies the node and its version.
    string version = 1;

    // Additional metadata that the node would like to provide. This field may
    // be used to list any meaningful data to the client.
    string metadata = 2;
}

message ImplementedServices {
    repeated string services = 1;
}

message PeerRequest {
    // Peer id of the peer requested.
    string peer_id = 1;
}

// Peers is a list of peer messages.
message Peers {
    repeated Peer peers = 1;
}

// Peer provides details of a peer on the network.
message Peer {
    // The address of the peer, as a full multiaddr, for example:
    // /ip4/37.221.192.134/tcp/13000/p2p/16Uiu2HAm8maLMjag1TAUM52zPfmLbVMGFdwUAWgoHu1HDQLR6e17
    string address = 1;
    // The direction of the connection (inbound/outbound).
    PeerDirection direction = 2;
    // The connection state of the peer at the moment of the request. (e.g. Connecting)
    ConnectionState connection_state = 3;
    // The peer id of the peer.
    string peer_id = 4;
    // The latest ENR of the peer that's in the record.
    string enr = 5;
}

// P2P Data on the local host.
message HostData {
    // All the  multiaddress of the peer, specified as a full multiaddr, for example:
    // /ip4/37.221.192.134/tcp/13000/p2p/16Uiu2HAm8maLMjag1TAUM52zPfmLbVMGFdwUAWgoHu1HDQLR6e17
    repeated string addresses = 1;
    // The peer id of the peer.
    string peer_id = 2;
    // The latest ENR of the local peer.
    string enr = 3;
}

// PeerDirection states the direction of the connection to a peer.
enum PeerDirection {
  UNKNOWN = 0;
  INBOUND = 1;
  OUTBOUND = 2;
}

// ConnectionState states the current status of the peer.
enum ConnectionState {
    DISCONNECTED = 0;
    DISCONNECTING = 1;
    CONNECTED = 2;
    CONNECTING = 3;
}

// ETH1ConnectionStatus states the current address and error of the ETH1 API
// endpoint. It also provides the addresses and errors for any fallback URLs. 
message ETH1ConnectionStatus {
    // Current ETH1 HTTP endpoint.
    string current_address = 1;

    // Current error (if any) of the current connection.
    string current_connection_error = 2;

    // A list of all provider URLs. 
    repeated string addresses = 3;

    // Current error (if any) of the HTTP connections.
    repeated string connection_errors = 4;
}