lnrpc: updating protos to include ChannelAcceptor

lnrpc/rpc.proto

@@ -430,6 +430,15 @@ service Lightning {
     */
     rpc OpenChannel (OpenChannelRequest) returns (stream OpenStatusUpdate);
 
+    /**
+    ChannelAcceptor dispatches a bi-directional streaming RPC in which
+    OpenChannel requests are sent to the client and the client responds with
+    a boolean that tells LND whether or not to accept the channel. This allows
+    node operators to specify their own criteria for accepting inbound channels
+    through a single persistent connection.
+    */
+    rpc ChannelAcceptor (stream ChannelAcceptResponse) returns (stream ChannelAcceptRequest);
+
     /** lncli: `closechannel`
     CloseChannel attempts to close an active channel identified by its channel
     outpoint (ChannelPoint). The actions of this method can additionally be
@@ -912,6 +921,58 @@ message SendToRouteRequest {
     Route route = 4;
 }
 
+message ChannelAcceptRequest {
+    /// The pubkey of the node that wishes to open an inbound channel.
+    bytes node_pubkey = 1;
+
+    /// The hash of the genesis block that the proposed channel resides in.
+    bytes chain_hash = 2;
+
+    /// The pending channel id.
+    bytes pending_chan_id = 3;
+
+    /// The funding amount in satoshis that initiator wishes to use in the channel.
+    uint64 funding_amt = 4;
+
+    /// The push amount of the proposed channel in millisatoshis.
+    uint64 push_amt = 5;
+
+    /// The dust limit of the initiator's commitment tx.
+    uint64 dust_limit = 6;
+
+    /// The maximum amount of coins in millisatoshis that can be pending in this channel.
+    uint64 max_value_in_flight = 7;
+
+    /// The minimum amount of satoshis the initiator requires us to have at all times.
+    uint64 channel_reserve = 8;
+
+    /// The smallest HTLC in millisatoshis that the initiator will accept.
+    uint64 min_htlc = 9;
+
+    /// The initial fee rate that the initiator suggests for both commitment transactions.
+    uint64 fee_per_kw = 10;
+
+    /**
+    The number of blocks to use for the relative time lock in the pay-to-self output
+    of both commitment transactions.
+    */
+    uint32 csv_delay = 11;
+
+    /// The total number of incoming HTLC's that the initiator will accept.
+    uint32 max_accepted_htlcs = 12;
+
+    /// A bit-field which the initiator uses to specify proposed channel behavior.
+    uint32 channel_flags = 13;
+}
+
+message ChannelAcceptResponse {
+    /// Whether or not the client accepts the channel.
+    bool accept = 1;
+
+    /// The pending channel id to which this response applies.
+    bytes pending_chan_id = 2;
+}
+
 message ChannelPoint {
     oneof funding_txid {
         /// Txid of the funding transaction

lnrpc/rpc.swagger.json

@@ -1657,6 +1657,76 @@
         }
       }
     },
+    "lnrpcChannelAcceptRequest": {
+      "type": "object",
+      "properties": {
+        "node_pubkey": {
+          "type": "string",
+          "format": "byte",
+          "description": "/ The pubkey of the node that wishes to open an inbound channel."
+        },
+        "chain_hash": {
+          "type": "string",
+          "format": "byte",
+          "description": "/ The hash of the genesis block that the proposed channel resides in."
+        },
+        "pending_chan_id": {
+          "type": "string",
+          "format": "byte",
+          "description": "/ The pending channel id."
+        },
+        "funding_amt": {
+          "type": "string",
+          "format": "uint64",
+          "description": "/ The funding amount in satoshis that initiator wishes to use in the channel."
+        },
+        "push_amt": {
+          "type": "string",
+          "format": "uint64",
+          "description": "/ The push amount of the proposed channel in millisatoshis."
+        },
+        "dust_limit": {
+          "type": "string",
+          "format": "uint64",
+          "description": "/ The dust limit of the initiator's commitment tx."
+        },
+        "max_value_in_flight": {
+          "type": "string",
+          "format": "uint64",
+          "description": "/ The maximum amount of coins in millisatoshis that can be pending in this channel."
+        },
+        "channel_reserve": {
+          "type": "string",
+          "format": "uint64",
+          "description": "/ The minimum amount of satoshis the initiator requires us to have at all times."
+        },
+        "min_htlc": {
+          "type": "string",
+          "format": "uint64",
+          "description": "/ The smallest HTLC in millisatoshis that the initiator will accept."
+        },
+        "fee_per_kw": {
+          "type": "string",
+          "format": "uint64",
+          "description": "/ The initial fee rate that the initiator suggests for both commitment transactions."
+        },
+        "csv_delay": {
+          "type": "integer",
+          "format": "int64",
+          "description": "*\nThe number of blocks to use for the relative time lock in the pay-to-self output\nof both commitment transactions."
+        },
+        "max_accepted_htlcs": {
+          "type": "integer",
+          "format": "int64",
+          "description": "/ The total number of incoming HTLC's that the initiator will accept."
+        },
+        "channel_flags": {
+          "type": "integer",
+          "format": "int64",
+          "description": "/ A bit-field which the initiator uses to specify proposed channel behavior."
+        }
+      }
+    },
     "lnrpcChannelBackup": {
       "type": "object",
       "properties": {

rpcserver.go

@@ -5051,3 +5051,8 @@ func (r *rpcServer) SubscribeChannelBackups(req *lnrpc.ChannelBackupSubscription
 		}
 	}
 }
+
+// ChannelAcceptor method stub.
+func (r *rpcServer) ChannelAcceptor(stream lnrpc.Lightning_ChannelAcceptorServer) error {
+	return nil
+}