Persistence Integration

.gitattributes

@@ -0,0 +1 @@
+*text=auto

.gitignore

@@ -11,5 +11,17 @@
 # Output of the go coverage tool, specifically when used with LiteIDE
 *.out
 
+/channel-service.
+
 # log files
 *.log
+/.vscode
+/.idea
+
+test/devnet/accounts
+test/devnet/data
+test/devnet/specs
+test/devnet/ckb-miner.toml
+test/devnet/ckb.toml
+test/devnet/default.db-options
+test/devnet/system_scripts

.gitmodules

@@ -1,3 +1,6 @@
 [submodule "perun-wallet-spec"]
 	path = perun-wallet-spec
 	url = [email protected]:perun-network/perun-wallet-spec
+[submodule "test/devnet/contracts"]
+	path = test/devnet/contracts
+	url = https://github.com/perun-network/perun-ckb-contract.git

LICENSE

@@ -0,0 +1,201 @@
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README.md

@@ -0,0 +1,142 @@
+<h1 align="center"><br>
+    <a href="https://perun.network/"><img src=".assets/go-perun.png" alt="Perun" width="196"></a>
+<br></h1>
+
+<h2 align="center">Perun-Channel-Service</h2>
+
+<p align="center">
+  <a href="https://www.apache.org/licenses/LICENSE-2.0.txt"><img src="https://img.shields.io/badge/license-Apache%202-blue" alt="License: Apache 2.0"></a>
+</p>
+
+This repository contains contains an implementation of the Channel Service, which is standardized to allow implementing Perun channels into any CKB wallet ready to conform with the standard.
+
+The specification can be found in the repository [perun-wallet-spec](https://github.com/perun-network/perun-wallet-spec). 
+
+
+## Table of Contents
+
+- [Table of Contents](#table-of-contents)
+- [Introduction](#introduction)
+- [Features](#features)
+- [Installation](#installation)
+- [Usage](#usage)
+- [Test](#test)
+    - [Test Chain Dependencies](#test-chain-dependencies)
+    - [Setup](#setup)
+- [Demo](#demo)
+- [License](#license)
+
+## Introduction
+
+The Perun-Channel-Service is a core component designed to facilitate the integration of Perun payment channels into CKB wallets. By adhering to the standardized implementation, developers can seamlessly integrate this service into their wallet applications, ensuring compatibility and enhanced functionality.
+
+## Features
+
+- Perun Payment Channels interactions (Open, Update, Close, Restore)
+- Built-in persistence
+- Compatible with any CKB wallet
+- Follows the [perun-wallet-spec](https://github.com/perun-network/perun-wallet-spec)
+- Open-source under the Apache 2.0 license
+
+## Installation
+
+Import the Perun-Channel-Service module:
+
+```
+go get github.com/perun-network/channel-service
+```
+
+You might need to replace the github path with the actual module name in your `go.mod`:
+
+```
+require (
+    github.com/perun-network/perun-channel-service v0.0.0
+)
+
+replace perun.network/channel-service v0.0.0 => github.com/perun-network/channel-service v0.1.0
+```
+## Usage
+
+Start a Channel-Service instance in a GRPC Server:
+
+````go
+// Create a channel service instance.
+cs, err := service.NewChannelService(wsc, network, rpcNodeUrl, d, nil, db)
+if  err != nil { /* error handling */ }
+
+// Deploy the channel service on a GRPC Server.
+lis := bufconn.Listen(bufSize)
+baseServer := grpc.NewServer()
+
+proto.RegisterChannelServiceServer(baseServer, cs)
+go func() {
+		err := baseServer.Serve(lis)
+		if err != nil { /* error handling */ }
+}()
+
+/*
+// ...
+*/
+
+// Clean up after use.
+defer func() {
+  	err := lis.Close()
+		if err != nil { /* error handling */ }
+		baseServer.Stop()
+}()
+
+````
+
+Wallet User can create a Channel Service Client by connecting to the GRPC Server:
+```go
+// Dial connection with channel service server.
+conn, err := grpc.DialContext(context.Background(), "bufnet", grpc.WithContextDialer(func(context.Context, string) (defaultnet.Conn, error) {
+	return lis.Dial()
+}), grpc.WithTransportCredentials(insecure.NewCredentials()))
+
+if  err != nil { /* error handling */ }
+
+// Create the channel service client.
+channelServiceClient := proto.NewChannelServiceClient(conn)
+```
+
+## Test
+#### Test Chain Dependencies
+
+We use various tools to enable a convenient setup for the local development testnet. If you want to use our `setup-devnet.sh` script, make sure the following commandline tools are installed:
+* `jq`:
+  - Used to parse and edit some configuration files.
+* `sed` and `awk`:
+  - We modify some fields of the files generated by the `ckb init --chain dev` command using `sed` and `awk`.
+* `tmux` and `tmuxp`:
+  - `tmuxp` is a session manager for `tmux` that allows to easily create descriptive `.yaml` configuration files to create and attach to `tmux` sessions.
+* `expect`:
+  - We completely automize the process for test-wallet creation, deploying of contracts etc. To make this work reliably, we use `expect` which allows to describe how a commandline application is fed input.
+* `make`:
+  - Not strictly necessary, but it should be available on most systems by default. In case you do not want to install `make` check out the `Makefile` content and issue the command on your own.
+* `ckb` with version `0.109.0` or higher.
+* `ckb-cli` with version `1.4.0` or higher.
+* `capsule` with version `0.9.2`.
+* `docker` and a **running** `dockerd` instance!
+
+#### Setup
+Start a test chain on a terminal.
+```bash
+cd ./test/devnet
+make dev
+```
+Test the channel-service on another terminal.
+```
+go test -v channel_service_test.go 
+```
+
+
+
+## Demo
+
+The [Perun-Nervos-Demo](https://github.com/perun-network/perun-nervos-demo) demonstrates the use of how a Wallet User can interact with the Channel-Service through RPC Messages and manage Perun Payment Channels on Nervos Network.
+
+
+## License
+This project is licensed under the Apache 2.0 License - see the [LICENSE](LICENSE) file for details.
+