feat: custom and store self agent version + store self protocol version (#800)

* feat: custom and store self protocol and agent version

* fix: do not enable custom protocolVersion

doc/API.md

@@ -92,6 +92,7 @@ Creates an instance of Libp2p.
 | options.modules | [`Array<object>`](./CONFIGURATION.md#modules) | libp2p [modules](./CONFIGURATION.md#modules) to use |
 | [options.addresses] | `{ listen: Array<string>, announce: Array<string>, noAnnounce: Array<string> }` | Addresses for transport listening and to advertise to the network |
 | [options.config] | `object` | libp2p modules configuration and core configuration |
+| [options.host] | `{ agentVersion: string }` | libp2p host options |
 | [options.connectionManager] | [`object`](./CONFIGURATION.md#configuring-connection-manager) | libp2p Connection Manager [configuration](./CONFIGURATION.md#configuring-connection-manager) |
 | [options.transportManager] | [`object`](./CONFIGURATION.md#configuring-transport-manager) | libp2p transport manager [configuration](./CONFIGURATION.md#configuring-transport-manager) |
 | [options.datastore] | `object` | must implement [ipfs/interface-datastore](https://github.com/ipfs/interface-datastore) (in memory datastore will be used if not provided) |

src/config.js

@@ -4,6 +4,7 @@ const mergeOptions = require('merge-options')
 const { dnsaddrResolver } = require('multiaddr/src/resolvers')
 
 const Constants = require('./constants')
+const { AGENT_VERSION } = require('./identify/consts')
 
 const { FaultTolerance } = require('./transport-manager')
 
@@ -27,6 +28,9 @@ const DefaultConfig = {
       dnsaddr: dnsaddrResolver
     }
   },
+  host: {
+    agentVersion: AGENT_VERSION
+  },
   metrics: {
     enabled: false
   },

src/identify/index.js

@@ -83,6 +83,16 @@ class IdentifyService {
     this._protocols = protocols
 
     this.handleMessage = this.handleMessage.bind(this)
+
+    // Store self host metadata
+    this._host = {
+      agentVersion: AGENT_VERSION,
+      protocolVersion: PROTOCOL_VERSION,
+      ...libp2p._options.host
+    }
+
+    this.peerStore.metadataBook.set(this.peerId, 'AgentVersion', uint8ArrayFromString(this._host.agentVersion))
+    this.peerStore.metadataBook.set(this.peerId, 'ProtocolVersion', uint8ArrayFromString(this._host.protocolVersion))
   }
 
   /**
@@ -246,8 +256,8 @@ class IdentifyService {
     const signedPeerRecord = await this._getSelfPeerRecord()
 
     const message = Message.encode({
-      protocolVersion: PROTOCOL_VERSION,
-      agentVersion: AGENT_VERSION,
+      protocolVersion: this._host.protocolVersion,
+      agentVersion: this._host.agentVersion,
       publicKey,
       listenAddrs: this._libp2p.multiaddrs.map((ma) => ma.bytes),
       signedPeerRecord,

test/identify/index.spec.js

@@ -53,7 +53,8 @@ describe('Identify', () => {
         peerId: localPeer,
         connectionManager: new EventEmitter(),
         peerStore: new PeerStore({ peerId: localPeer }),
-        multiaddrs: listenMaddrs
+        multiaddrs: listenMaddrs,
+        _options: { host: {} }
       },
       protocols
     })
@@ -63,7 +64,8 @@ describe('Identify', () => {
         peerId: remotePeer,
         connectionManager: new EventEmitter(),
         peerStore: new PeerStore({ peerId: remotePeer }),
-        multiaddrs: listenMaddrs
+        multiaddrs: listenMaddrs,
+        _options: { host: {} }
       },
       protocols
     })
@@ -106,7 +108,8 @@ describe('Identify', () => {
         peerId: localPeer,
         connectionManager: new EventEmitter(),
         peerStore: new PeerStore({ peerId: localPeer }),
-        multiaddrs: listenMaddrs
+        multiaddrs: listenMaddrs,
+        _options: { host: {} }
       },
       protocols
     })
@@ -116,7 +119,8 @@ describe('Identify', () => {
         peerId: remotePeer,
         connectionManager: new EventEmitter(),
         peerStore: new PeerStore({ peerId: remotePeer }),
-        multiaddrs: listenMaddrs
+        multiaddrs: listenMaddrs,
+        _options: { host: {} }
       },
       protocols
     })
@@ -165,7 +169,8 @@ describe('Identify', () => {
         peerId: localPeer,
         connectionManager: new EventEmitter(),
         peerStore: new PeerStore({ peerId: localPeer }),
-        multiaddrs: []
+        multiaddrs: [],
+        _options: { host: {} }
       },
       protocols
     })
@@ -174,7 +179,8 @@ describe('Identify', () => {
         peerId: remotePeer,
         connectionManager: new EventEmitter(),
         peerStore: new PeerStore({ peerId: remotePeer }),
-        multiaddrs: []
+        multiaddrs: [],
+        _options: { host: {} }
       },
       protocols
     })
@@ -201,6 +207,36 @@ describe('Identify', () => {
       .and.to.have.property('code', Errors.ERR_INVALID_PEER)
   })
 
+  it('should store host data and protocol version into metadataBook', () => {
+    const agentVersion = 'js-project/1.0.0'
+    const peerStore = new PeerStore({ peerId: localPeer })
+
+    sinon.spy(peerStore.metadataBook, 'set')
+
+    new IdentifyService({ // eslint-disable-line no-new
+      libp2p: {
+        peerId: localPeer,
+        connectionManager: new EventEmitter(),
+        peerStore,
+        multiaddrs: listenMaddrs,
+        _options: {
+          host: {
+            agentVersion
+          }
+        }
+      },
+      protocols
+    })
+
+    expect(peerStore.metadataBook.set.callCount).to.eql(2)
+
+    const storedAgentVersion = peerStore.metadataBook.getValue(localPeer, 'AgentVersion')
+    const storedProtocolVersion = peerStore.metadataBook.getValue(localPeer, 'ProtocolVersion')
+
+    expect(agentVersion).to.eql(unit8ArrayToString(storedAgentVersion))
+    expect(storedProtocolVersion).to.exist()
+  })
+
   describe('push', () => {
     it('should be able to push identify updates to another peer', async () => {
       const connectionManager = new EventEmitter()
@@ -211,7 +247,8 @@ describe('Identify', () => {
           peerId: localPeer,
           connectionManager: new EventEmitter(),
           peerStore: new PeerStore({ peerId: localPeer }),
-          multiaddrs: listenMaddrs
+          multiaddrs: listenMaddrs,
+          _options: { host: {} }
         },
         protocols: new Map([
           [multicodecs.IDENTIFY],
@@ -224,7 +261,8 @@ describe('Identify', () => {
           peerId: remotePeer,
           connectionManager,
           peerStore: new PeerStore({ peerId: remotePeer }),
-          multiaddrs: []
+          multiaddrs: [],
+          _options: { host: {} }
         }
       })
 
@@ -272,7 +310,8 @@ describe('Identify', () => {
           peerId: localPeer,
           connectionManager: new EventEmitter(),
           peerStore: new PeerStore({ peerId: localPeer }),
-          multiaddrs: listenMaddrs
+          multiaddrs: listenMaddrs,
+          _options: { host: {} }
         },
         protocols: new Map([
           [multicodecs.IDENTIFY],
@@ -285,7 +324,8 @@ describe('Identify', () => {
           peerId: remotePeer,
           connectionManager,
           peerStore: new PeerStore({ peerId: remotePeer }),
-          multiaddrs: []
+          multiaddrs: [],
+          _options: { host: {} }
         }
       })
 
@@ -404,5 +444,23 @@ describe('Identify', () => {
       // Verify the streams close
       await pWaitFor(() => connection.streams.length === 0)
     })
+
+    it('should store host data and protocol version into metadataBook', () => {
+      const agentVersion = 'js-project/1.0.0'
+
+      libp2p = new Libp2p({
+        ...baseOptions,
+        peerId,
+        host: {
+          agentVersion
+        }
+      })
+
+      const storedAgentVersion = libp2p.peerStore.metadataBook.getValue(localPeer, 'AgentVersion')
+      const storedProtocolVersion = libp2p.peerStore.metadataBook.getValue(localPeer, 'ProtocolVersion')
+
+      expect(agentVersion).to.eql(unit8ArrayToString(storedAgentVersion))
+      expect(storedProtocolVersion).to.exist()
+    })
   })
 })