UniFFI bindings

.github/workflows/build.yml

@@ -22,7 +22,9 @@ jobs:
           profile: minimal
       - name: Build on Rust ${{ matrix.toolchain }}
         run: cargo build --verbose --color always
-      - name: Check formatting
+      - name: Check release build on Rust ${{ matrix.toolchain }}
+        run: cargo check --release --verbose --color always
+      - name: Check formatting on Rust ${{ matrix.toolchain }}
         if: matrix.check-fmt
         run: rustup component add rustfmt && cargo fmt --all -- --check
       - name: Test on Rust ${{ matrix.toolchain }}

.gitignore

@@ -8,3 +8,19 @@ Cargo.lock
 
 # These are backup files generated by rustfmt
 **/*.rs.bk
+
+# Ignore generated swift related files
+.swiftpm/
+ldk_nodeFFI.*
+ldk_node.swift
+libldk_node.dylib
+LightningDevKitNode.swift
+ldk_node.swiftmodule
+swift.swiftsourceinfo
+swift.abi.json
+swift.swiftdoc
+
+# Ignore ldk_nodeFFI.xcframework files
+/bindings/swift/ldk_nodeFFI.xcframework
+/bindings/kotlin/ldk-node-android/lib/src/main/jniLibs
+/bindings/kotlin/ldk-node-android/lib/src/main/kotlin/org/lightningdevkit/ldknode/ldk_node.kt

Cargo.toml

@@ -13,6 +13,22 @@ categories = ["cryptography::cryptocurrencies"]
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
+[lib]
+crate-type = ["staticlib", "cdylib"]
+name = "ldk_node"
+
+[[bin]]
+name = "uniffi-bindgen"
+path = "uniffi-bindgen.rs"
+
+[profile.release-smaller]
+inherits = "release"
+opt-level = 'z'     # Optimize for size.
+lto = true          # Enable Link Time Optimization
+codegen-units = 1   # Reduce number of codegen units to increase optimizations.
+panic = 'abort'     # Abort on panic
+strip = true        # Strip symbols from binary*
+
 [dependencies]
 lightning = { version = "0.0.115", features = ["max_level_trace", "std"] }
 lightning-invoice = { version = "0.23" }
@@ -51,13 +67,18 @@ serde_json = { version = "1.0" }
 tokio = { version = "1", default-features = false, features = [ "rt-multi-thread", "time", "sync" ] }
 esplora-client = { version = "0.4", default-features = false }
 libc = "0.2"
+uniffi = { version = "0.23.0", features = ["build"] }
 
 [dev-dependencies]
 electrsd = { version = "0.22.0", features = ["legacy", "esplora_a33e97e1", "bitcoind_23_0"] }
 electrum-client = "0.12.0"
 proptest = "1.0.0"
 regex = "1.5.6"
 
+[build-dependencies]
+uniffi = { version = "0.23.0", features = ["build", "cli"] }
+
+
 [profile.release]
 panic = "abort"
 

bindings/kotlin/ldk-node-android/.gitattributes

@@ -0,0 +1,9 @@
+#
+# https://help.github.com/articles/dealing-with-line-endings/
+#
+# Linux start script should use lf
+/gradlew        text eol=lf
+
+# These are Windows script files and should use crlf
+*.bat           text eol=crlf
+

bindings/kotlin/ldk-node-android/.gitignore

@@ -0,0 +1,5 @@
+# Ignore Gradle project-specific cache directory
+.gradle
+
+# Ignore Gradle build output directory
+build

bindings/kotlin/ldk-node-android/build.gradle.kts

@@ -0,0 +1,17 @@
+buildscript {
+    repositories {
+        google()
+    }
+    dependencies {
+        classpath("com.android.tools.build:gradle:7.1.2")
+    }
+}
+
+plugins {
+    id("io.github.gradle-nexus.publish-plugin") version "1.1.0"
+}
+
+// library version is defined in gradle.properties
+val libraryVersion: String by project
+
+version = libraryVersion

bindings/kotlin/ldk-node-android/gradle.properties

@@ -0,0 +1,5 @@
+org.gradle.jvmargs=-Xmx1536m
+android.useAndroidX=true
+android.enableJetifier=true
+kotlin.code.style=official
+libraryVersion=0.1

bindings/kotlin/ldk-node-android/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,6 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.6-bin.zip
+networkTimeout=10000
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists