grpc: GetPeerInfo and GetNetworkInfo are not well defined

[b00f]

We try our best to define gRPC APIs as much as possible close to the Bitcoin JSON-RPC APIs. It looks the GetNetworkInfo and GetPeerInfo in our proto file are not well defined.

GetNetworkInfo

In Bitcoin, getnetworkinfo is designed to "Returns an object containing various state info regarding P2P networking".
For example, here is the result of calling getnetworkinfo in my local machine.

{
  "version": 220000,
  "subversion": "/Satoshi:22.0.0/",
  "protocolversion": 70016,
  "localservices": "0000000000000408",
  "localservicesnames": [
    "WITNESS",
    "NETWORK_LIMITED"
  ],
  "localrelay": true,
  "timeoffset": 0,
  "networkactive": true,
  "connections": 3,
  "connections_in": 0,
  "connections_out": 3,
  "networks": [
    {
      "name": "ipv4",
      "limited": false,
      "reachable": true,
      "proxy": "",
      "proxy_randomize_credentials": false
    },
    {
      "name": "ipv6",
      "limited": false,
      "reachable": true,
      "proxy": "",
      "proxy_randomize_credentials": false
    },
    {
      "name": "onion",
      "limited": true,
      "reachable": false,
      "proxy": "",
      "proxy_randomize_credentials": false
    },
    {
      "name": "i2p",
      "limited": true,
      "reachable": false,
      "proxy": "",
      "proxy_randomize_credentials": false
    }
  ],
  "relayfee": 0.00001000,
  "incrementalfee": 0.00001000,
  "localaddresses": [
    {
      "address": "....",
      "port": 8333,
      "score": 1
    },
    {
      "address": "....",
      "port": 8333,
      "score": 1
    }
  ],
  "warnings": ""
}

GetNetworkInfo in our proto returns the list of peers info. It is not compatible with the getnetworkinfo. So we need to redefine the GetNetworkInfoResponse properly.
We should be able to get information about the network from libp2p. We can do it in another PR, but it should be accessible in this gRPC call.

GetPeerInfo

In Bitcoin, getpeerinfo is designed to "Returns data about each connected network node as a json array of objects.".
For example, here is the result of calling getpeerinfo in my local machine.

[
  {
    "id": 0,
    "addr": "69.228.134.38:8333",
    "addrbind": "192.168.1.203:50606",
    "addrlocal": "115.134.6.105:50606",
    "network": "ipv4",
    "services": "0000000000000409",
    "servicesnames": [
      "NETWORK",
      "WITNESS",
      "NETWORK_LIMITED"
    ],
    "relaytxes": false,
    "lastsend": 1668569765,
    "lastrecv": 1668569765,
    "last_transaction": 0,
    "last_block": 1668569765,
    "bytessent": 9082,
    "bytesrecv": 118829731,
    "conntime": 1668569714,
    "timeoffset": -2,
    "pingtime": 0.253437,
    "minping": 0.253437,
    "version": 70016,
    "subver": "/Satoshi:23.0.0/",
    "inbound": false,
    "bip152_hb_to": false,
    "bip152_hb_from": false,
    "startingheight": 763371,
    "synced_headers": 763371,
    "synced_blocks": 512398,
    "inflight": [
      512566,
      512569,
      512570,
      512571,
      512574,
      512576,
      512579,
      512581,
      512582,
      512584,
      512587,
      512588,
      512591,
      512593,
      512611,
      512614
    ],
    "addr_processed": 0,
    "addr_rate_limited": 0,
    "permissions": [
    ],
    "minfeefilter": 0.00000000,
    "bytessent_per_msg": {
      "getdata": 7677,
      "getheaders": 1053,
      "ping": 32,
      "pong": 32,
      "sendaddrv2": 24,
      "sendcmpct": 66,
      "sendheaders": 24,
      "verack": 24,
      "version": 126,
      "wtxidrelay": 24
    },
    "bytesrecv_per_msg": {
      "block": 118362994,
      "feefilter": 32,
      "getheaders": 1053,
      "headers": 106,
      "ping": 32,
      "pong": 32,
      "sendaddrv2": 24,
      "sendcmpct": 66,
      "sendheaders": 24,
      "verack": 24,
      "version": 126,
      "wtxidrelay": 24
    },
    "connection_type": "block-relay-only"
  },
  {
    "id": 1,
    ...
  },
  {
    "id": 4,
    ...
  },
  {
    "id": 5,
    ...
  },
  {
    "id": 7,
   ...
  }
]

GetPeerInfo in our proto returns our local node info. It is not compatible with the getpeerinfo. So we need to redefine the GetPeerInfoResponse like:

message GetPeerInfoResponse {
  repeated PeerInfo peers = 1;
}

It should return the list of connected peers to our local node. The PeerInfo struct can be used here, but not for GetNetworkInfo. They might have some common fields like version, but they are not the same.

[b00f]

related to #424