Lightning block sync and sample block sources

.github/workflows/build.yml

@@ -13,7 +13,7 @@ jobs:
                      1.30.0,
                      # 1.34.2 is Debian stable
                      1.34.2,
-                     # 1.39.0 is MSRV for lightning-net-tokio and generates coverage
+                     # 1.39.0 is MSRV for lightning-net-tokio and lightning-block-sync and generates coverage
                      1.39.0]
         include:
           - toolchain: stable
@@ -48,6 +48,15 @@ jobs:
       - name: Build on Rust ${{ matrix.toolchain }}
         if: "! matrix.build-net-tokio"
         run: cargo build --verbose  --color always -p lightning
+      - name: Build Block Sync Clients on Rust ${{ matrix.toolchain }} with features
+        if: matrix.build-net-tokio
+        run: |
+          cd lightning-block-sync
+          RUSTFLAGS="-C link-dead-code" cargo build --verbose --color always --features rest-client
+          RUSTFLAGS="-C link-dead-code" cargo build --verbose --color always --features rpc-client
+          RUSTFLAGS="-C link-dead-code" cargo build --verbose --color always --features rpc-client,rest-client
+          RUSTFLAGS="-C link-dead-code" cargo build --verbose --color always --features rpc-client,rest-client,tokio
+          cd ..
       - name: Test on Rust ${{ matrix.toolchain }} with net-tokio
         if: "matrix.build-net-tokio && !matrix.coverage"
         run: cargo test --verbose --color always

Cargo.toml

@@ -2,6 +2,7 @@
 
 members = [
     "lightning",
+    "lightning-block-sync",
     "lightning-net-tokio",
     "lightning-persister",
 ]

lightning-block-sync/Cargo.toml

@@ -0,0 +1,27 @@
+[package]
+name = "lightning-block-sync"
+version = "0.0.1"
+authors = ["Matt Corallo"]
+license = "Apache-2.0"
+edition = "2018"
+description = """
+Utilities to fetch the chain from Bitcoin Core REST/RPC Interfaces and feed them into Rust Lightning.
+"""
+
+[features]
+rest-client = [ "serde", "serde_json", "serde_derive", "chunked_transfer" ]
+rpc-client = [ "serde", "serde_json", "serde_derive", "base64", "chunked_transfer" ]
+
+[dependencies]
+bitcoin = "0.24"
+lightning = { version = "0.0.11", path = "../lightning" }
+tokio = { version = ">=0.2.12", features = [ "tcp", "io-util", "dns" ], optional = true }
+serde = { version = "1", optional = true }
+serde_json = { version = "1", optional = true }
+serde_derive = { version = "1", optional = true }
+base64 = { version = "0.9", optional = true }
+chunked_transfer = { version = "1.3.0", optional = true }
+futures = { version = "0.3.8" }
+
+[dev-dependencies]
+tokio = { version = ">=0.2.12", features = [ "macros", "rt-core" ] }