Implement lightning-net

Squashed commits in original PR at
lexe-app#1:

- Create empty lightning-net module
- SyncSocketDescriptor skeleton implementation
- Connection struct with read and write halves
- Implement shutdown() for TcpReader and TcpWriter
- Implement most of spawn_inbound_handler
- Add crossbeam and some associated channels
- Implement basic functionality of ConnectionWriter
- Pass a Arc<PeerManager> into ConnectionReader
- Get a SyncSocketDescriptor into the ConnectionWriter
- Implement first half of pausing reads
- Renome write tx/rx to write_data tx/rx
- Rename ConnectionReader/Writer to Reader/Writer
- Create the Reader/Writer cmd channels
- Send ResumeRead command to the Reader
- Remove write_cmd, rename reader_cmd -> resume_read
- Reader can handle ResumeRead events
- Implement disconnecting from peer
- send_data() actually sends data now
- Allow send_data() to pause reads
- Get a Arc<PeerManager> into Writer
- Refactor write_data tx/rx into writer_cmd tx/rx
- Give Reader/Writer a cmd tx for the other
- Implement all disconnecting except TcpDisconnectooor
- Remove the Arc<Mutex<Connection>>
- Refactor Connection into setup()
- disconnect_socket() now calls into TcpDisconnectooor
- Get a SyncSocketDescriptor into Writer
- Call write_buffer_space_avail and socket_disconnected v2
- resume_read check should go before the early return
- Handle read() ErrorKind variants
- Implement handle_connection and initiate_outbound
- Finish writing doc comments, clean up
- Basic tests for lightning-net
- These is modeled exactly after the tests in lightning-net-tokio
- Update GitHub CI and dependabot for lightning-net
- Reduce the dependencies used
- Implementing PR review feedback from @phlip9
- Remove some comments about SGX
- Hide ID_COUNTER in a function, return JoinHandles
- Reader/Writer now send commands via the descriptor
- Extract do_recv(), do_try_recv(), do_read() fns v2
- Split WriteData command into its own channel v4
- Remove `std::net` limitations from EDP doc comment
- Implement ReaderState enum v2

Author: MaxFangX

.github/dependabot.yml

@@ -18,6 +18,10 @@ updates:
     directory: "/lightning-invoice" 
     schedule:
       interval: "daily"
+  - package-ecosystem: "cargo" 
+    directory: "/lightning-net"
+    schedule:
+      interval: "daily"
   - package-ecosystem: "cargo" 
     directory: "/lightning-net-tokio"
     schedule:

.github/workflows/build.yml

@@ -10,7 +10,7 @@ jobs:
         platform: [ ubuntu-latest ]
         toolchain: [ stable,
                      beta,
-                     # 1.41.1 is MSRV for Rust-Lightning, lightning-invoice, and lightning-persister
+                     # 1.41.1 is MSRV for Rust-Lightning, lightning-invoice, lightning-persister, lightning-net, and lightning-background-processor
                      1.41.1,
                      # 1.45.2 is MSRV for lightning-net-tokio, lightning-block-sync, and coverage generation
                      1.45.2,
@@ -74,6 +74,7 @@ jobs:
           cargo build --verbose  --color always -p lightning
           cargo build --verbose  --color always -p lightning-invoice
           cargo build --verbose  --color always -p lightning-persister
+          cargo build --verbose  --color always -p lightning-net
       - name: Build on Rust ${{ matrix.toolchain }} with all Log-Limiting features
         if: matrix.test-log-variants
         run: |
@@ -142,13 +143,15 @@ jobs:
           cargo test --verbose --color always  -p lightning
           cargo test --verbose --color always  -p lightning-invoice
           cargo build --verbose  --color always -p lightning-persister
+          cargo build --verbose  --color always -p lightning-net
           cargo build --verbose  --color always -p lightning-background-processor
       - name: Test C Bindings Modifications on Rust ${{ matrix.toolchain }}
         if: "! matrix.build-net-tokio"
         run: |
           RUSTFLAGS="--cfg=c_bindings" cargo test --verbose --color always  -p lightning
           RUSTFLAGS="--cfg=c_bindings" cargo test --verbose --color always  -p lightning-invoice
           RUSTFLAGS="--cfg=c_bindings" cargo build --verbose  --color always -p lightning-persister
+          RUSTFLAGS="--cfg=c_bindings" cargo build --verbose  --color always -p lightning-net
           RUSTFLAGS="--cfg=c_bindings" cargo build --verbose  --color always -p lightning-background-processor
       - name: Test Block Sync Clients on Rust ${{ matrix.toolchain }} with features
         if: "matrix.build-net-tokio && !matrix.coverage"

Cargo.toml

@@ -4,6 +4,7 @@ members = [
     "lightning",
     "lightning-block-sync",
     "lightning-invoice",
+    "lightning-net",
     "lightning-net-tokio",
     "lightning-persister",
     "lightning-background-processor",

lightning-net/Cargo.toml

@@ -0,0 +1,22 @@
+[package]
+name = "lightning-net"
+version = "0.0.106"
+authors = ["Max Fang <[email protected]>"]
+license = "MIT OR Apache-2.0"
+repository = "https://github.com/lightningdevkit/rust-lightning/"
+description = """
+Implementation of the rust-lightning network stack for a synchronous runtime.
+For Rust-Lightning clients which wish to make direct connections to Lightning
+P2P nodes, this is a simple alternative to implementing the required network
+stack for those who do not want to use async Rust or Tokio.
+"""
+edition = "2018"
+
+[package.metadata.docs.rs]
+all-features = true
+rustdoc-args = ["--cfg", "docsrs"]
+
+[dependencies]
+bitcoin = "0.28.1"
+lightning = { version = "0.0.106", path = "../lightning" }
+crossbeam-channel = "0.5.4"