Add support for v0.11 GRPC services

This also refactors the client GRPC wrapper to dynamically load the
request objects.
All GRPC generated client files now live under lib/grpc_services

lib/grpc_services/walletrpc/walletkit_services_pb.rb

@@ -0,0 +1,115 @@
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# Source: walletrpc/walletkit.proto for package 'walletrpc'
+
+require 'grpc'
+require 'walletrpc/walletkit_pb'
+
+module Walletrpc
+  module WalletKit
+    # WalletKit is a service that gives access to the core functionalities of the
+    # daemon's wallet.
+    class Service
+
+      include GRPC::GenericService
+
+      self.marshal_class_method = :encode
+      self.unmarshal_class_method = :decode
+      self.service_name = 'walletrpc.WalletKit'
+
+      #
+      # ListUnspent returns a list of all utxos spendable by the wallet with a
+      # number of confirmations between the specified minimum and maximum.
+      rpc :ListUnspent, ListUnspentRequest, ListUnspentResponse
+      #
+      # LeaseOutput locks an output to the given ID, preventing it from being
+      # available for any future coin selection attempts. The absolute time of the
+      # lock's expiration is returned. The expiration of the lock can be extended by
+      # successive invocations of this RPC. Outputs can be unlocked before their
+      # expiration through `ReleaseOutput`.
+      rpc :LeaseOutput, LeaseOutputRequest, LeaseOutputResponse
+      #
+      # ReleaseOutput unlocks an output, allowing it to be available for coin
+      # selection if it remains unspent. The ID should match the one used to
+      # originally lock the output.
+      rpc :ReleaseOutput, ReleaseOutputRequest, ReleaseOutputResponse
+      #
+      # DeriveNextKey attempts to derive the *next* key within the key family
+      # (account in BIP43) specified. This method should return the next external
+      # child within this branch.
+      rpc :DeriveNextKey, KeyReq, Signrpc::KeyDescriptor
+      #
+      # DeriveKey attempts to derive an arbitrary key specified by the passed
+      # KeyLocator.
+      rpc :DeriveKey, Signrpc::KeyLocator, Signrpc::KeyDescriptor
+      #
+      # NextAddr returns the next unused address within the wallet.
+      rpc :NextAddr, AddrRequest, AddrResponse
+      #
+      # PublishTransaction attempts to publish the passed transaction to the
+      # network. Once this returns without an error, the wallet will continually
+      # attempt to re-broadcast the transaction on start up, until it enters the
+      # chain.
+      rpc :PublishTransaction, Transaction, PublishResponse
+      #
+      # SendOutputs is similar to the existing sendmany call in Bitcoind, and
+      # allows the caller to create a transaction that sends to several outputs at
+      # once. This is ideal when wanting to batch create a set of transactions.
+      rpc :SendOutputs, SendOutputsRequest, SendOutputsResponse
+      #
+      # EstimateFee attempts to query the internal fee estimator of the wallet to
+      # determine the fee (in sat/kw) to attach to a transaction in order to
+      # achieve the confirmation target.
+      rpc :EstimateFee, EstimateFeeRequest, EstimateFeeResponse
+      #
+      # PendingSweeps returns lists of on-chain outputs that lnd is currently
+      # attempting to sweep within its central batching engine. Outputs with similar
+      # fee rates are batched together in order to sweep them within a single
+      # transaction.
+      #
+      # NOTE: Some of the fields within PendingSweepsRequest are not guaranteed to
+      # remain supported. This is an advanced API that depends on the internals of
+      # the UtxoSweeper, so things may change.
+      rpc :PendingSweeps, PendingSweepsRequest, PendingSweepsResponse
+      #
+      # BumpFee bumps the fee of an arbitrary input within a transaction. This RPC
+      # takes a different approach than bitcoind's bumpfee command. lnd has a
+      # central batching engine in which inputs with similar fee rates are batched
+      # together to save on transaction fees. Due to this, we cannot rely on
+      # bumping the fee on a specific transaction, since transactions can change at
+      # any point with the addition of new inputs. The list of inputs that
+      # currently exist within lnd's central batching engine can be retrieved
+      # through the PendingSweeps RPC.
+      #
+      # When bumping the fee of an input that currently exists within lnd's central
+      # batching engine, a higher fee transaction will be created that replaces the
+      # lower fee transaction through the Replace-By-Fee (RBF) policy. If it
+      #
+      # This RPC also serves useful when wanting to perform a Child-Pays-For-Parent
+      # (CPFP), where the child transaction pays for its parent's fee. This can be
+      # done by specifying an outpoint within the low fee transaction that is under
+      # the control of the wallet.
+      #
+      # The fee preference can be expressed either as a specific fee rate or a delta
+      # of blocks in which the output should be swept on-chain within. If a fee
+      # preference is not explicitly specified, then an error is returned.
+      #
+      # Note that this RPC currently doesn't perform any validation checks on the
+      # fee preference being provided. For now, the responsibility of ensuring that
+      # the new fee preference is sufficient is delegated to the user.
+      rpc :BumpFee, BumpFeeRequest, BumpFeeResponse
+      #
+      # ListSweeps returns a list of the sweep transactions our node has produced.
+      # Note that these sweeps may not be confirmed yet, as we record sweeps on
+      # broadcast, not confirmation.
+      rpc :ListSweeps, ListSweepsRequest, ListSweepsResponse
+      #
+      # LabelTransaction adds a label to a transaction. If the transaction already
+      # has a label the call will fail unless the overwrite bool is set. This will
+      # overwrite the exiting transaction label. Labels must not be empty, and
+      # cannot exceed 500 characters.
+      rpc :LabelTransaction, LabelTransactionRequest, LabelTransactionResponse
+    end
+
+    Stub = Service.rpc_stub_class
+  end
+end