mirror of https://github.com/bumi/lnrpc
142 lines
3.9 KiB
Markdown
142 lines
3.9 KiB
Markdown
# Lnrpc - ruby gRPC client for LND
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a [gRPC](https://grpc.io/) client for [LND, the Lightning Network Daemon](https://github.com/lightningnetwork/lnd/) packed as ruby gem.
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## Installation
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Add this line to your application's Gemfile:
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```ruby
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gem 'lnrpc'
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```
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And then execute:
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$ bundle
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Or install it yourself as:
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$ gem install lnrpc
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## Usage
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This gem makes the gRPC client classes created from the [LND service defintions](https://github.com/lightningnetwork/lnd/tree/master/lnrpc) available.
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```ruby
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require "lnrpc"
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# the gRPC client is available under the Lnrpc namespace, e.g.
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Lnrpc::Lightning::Stub
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Lnrpc::GetInfoRequest
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```
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Learn more about [gRPC](https://grpc.io/) on [gRPC.io](https://grpc.io/).
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The LND API reference can be found here: [https://api.lightning.community/](https://api.lightning.community/)
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### Example
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```ruby
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require "lnrpc"
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credentials = File.read("/path/to/tls.cert")
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macaroon = File.read("/path/to/readonly.macaroon").unpack("H*")
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# initialize a new client
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client = Lnrpc::Lightning::Stub.new("localhost:10009", GRPC::Core::ChannelCredentials.new(self.credentials))
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# perform a request
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request = Lnrpc::GetInfoRequest.new
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response = client.get_info(request, { metadata: { macaroon: macaroon } }) #=> Lnrpc::GetInfoResponse
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puts response.alias
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```
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### Client wrapper
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An optional client wrapper ([Lnrpc::Client](https://github.com/bumi/lnrpc/blob/master/lib/lnrpc/client.rb")) makes
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initializing the gRPC client easier and removes the need for some boilerplate code for calling RPC methods.
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#### Example
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```ruby
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lnd = Lnrpc::Client.new({credentials_path: '/path/to.cert.cls', macaroon_path: '/path/to/admin.macaroon'})
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lnd.get_info
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```
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Also have a look at [examples.rb](https://github.com/bumi/lnrpc/blob/master/examples.rb)
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#### Initializing a new client
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The Lnrpc::Client constructor allows the following options:
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* credentials:
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- `credentials` : the credentials data as string
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- `credentials_path` : the path to a credentials file (tls.cert) as string
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* macaroon:
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- `macaroon` : the macaroon as hex string
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- `macaroon_path` : the path to the macaroon file created by lnd as string
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* address:
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- `address` : lnd address as string. format: address:port, e.g. default: localhost:10009
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```ruby
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require 'lnrpc'
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lnd = Lnrpc::Client.new({
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credentials_path: '/path/to.cert.cls',
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macaroon_path: '/path/to/admin.macaroon',
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address: 'host:port'
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})
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# the actual gRPC client is available through:
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lnd.grpc_client
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```
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#### Calling RPC methods
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The client wrapper passes any supported RPC method call to the gRPC client applying the following conventions:
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If the first parameter is a hash or blank the corresponding gRPC request object will be instantiated
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If the second paramter is blank the macaroon will be passed as metadata: `{ metadata: { macaroon: self.macaroon } }`
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Example:
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```ruby
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client.get_info
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# is the same as:
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client.grpc_client.get_info(Lnrpc::GetInfoRequest.new, { metadata: { macaroon: macaroon } })
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client.list_channels(inactive_only: true)
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# is the same as:
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request = Lnrpc::ListChannelsRequest.new(inactive_only: true)
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client.grpc_client.list_channels(request, { metadata: { macaroon: macaroon } })
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client.wallet_balance.total_balance
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# is the same as:
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request = Lnrpc::WalletBalanceRequest.new()
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client.grpc_client.wallet_balance(request, { metadata: { macaroon: macaroon } }).total_balance
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```
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## Versioning
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This gem follows the LND versions and will update the gRPC service definitions accordingly.
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e.g. gem version 0.5.2 includes the gRPC service definitions from LND v0.5.2
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## Other resources
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* [LND gRPC API Reference](https://api.lightning.community)
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* [LND Developer Site](https://dev.lightning.community/)
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* [gRPC Ruby quick start](https://grpc.io/docs/quickstart/ruby.html)
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## Contributing
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Bug reports and pull requests are welcome on GitHub at https://github.com/bumi/lnrpc.
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## License
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The gem is available as open source under the terms of the [MIT License](https://opensource.org/licenses/MIT).
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