Add Rust bindings to Go VDF

Cargo.lock

@@ -17,18 +17,126 @@ version = "0.1.6"
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+ "anstyle",
+ "anstyle-parse",
+ "anstyle-query",
+ "anstyle-wincon",
+ "colorchoice",
+ "is_terminal_polyfill",
+ "utf8parse",
+]
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+ "serde",
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@@ -74,6 +182,44 @@ version = "1.5.0"
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+dependencies = [
+ "serde",
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+
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+ "semver",
+ "serde",
+ "serde_json",
+ "thiserror",
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@@ -120,6 +266,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "90bc066a67923782aa8515dbaea16946c5bcc5addbd668bb80af688e53e548a0"
 dependencies = [
  "clap_builder",
+ "clap_derive",
 ]
 
 [[package]]
@@ -128,8 +275,22 @@ version = "4.5.2"
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 checksum = "ae129e2e766ae0ec03484e609954119f123cc1fe650337e155d03b022f24f7b4"
 dependencies = [
+ "anstream",
  "anstyle",
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+ "strsim",
+]
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+dependencies = [
+ "heck 0.5.0",
+ "proc-macro2",
+ "quote",
+ "syn",
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 [[package]]
@@ -147,6 +308,12 @@ dependencies = [
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 ]
 
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+
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@@ -235,6 +402,15 @@ version = "0.1.2"
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+dependencies = [
+ "autocfg",
+]
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@@ -244,6 +420,23 @@ dependencies = [
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+[[package]]
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+dependencies = [
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+ "plain",
+ "scroll",
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@@ -254,6 +447,18 @@ dependencies = [
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@@ -319,6 +530,38 @@ version = "2.7.2"
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+dependencies = [
+ "memchr",
+ "minimal-lexical",
+]
+
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@@ -334,6 +577,12 @@ version = "1.19.0"
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@@ -346,6 +595,18 @@ version = "0.2.3"
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+
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@@ -456,6 +717,35 @@ dependencies = [
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+dependencies = [
+ "serde",
+]
+
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@@ -499,6 +789,24 @@ dependencies = [
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 ]
 
+[[package]]
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+
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@@ -510,6 +818,26 @@ dependencies = [
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 ]
 
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c546c80d6be4bc6a00c0f01730c08df82eaa7a7a61f11d656526506112cc1709"
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+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
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@@ -520,18 +848,174 @@ dependencies = [
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+[[package]]
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@@ -542,8 +1026,15 @@ dependencies = [
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+ "uniffi",
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+version = "0.9.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
+
 [[package]]
 name = "walkdir"
 version = "2.5.0"
@@ -618,6 +1109,15 @@ dependencies = [
  "wasm-bindgen",
 ]
 
+[[package]]
+name = "weedle2"
+version = "4.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2e79c5206e1f43a2306fd64bdb95025ee4228960f2e6c5a8b173f3caaf807741"
+dependencies = [
+ "nom",
+]
+
 [[package]]
 name = "winapi-util"
 version = "0.1.8"

Cargo.toml

@@ -18,7 +18,8 @@ members = [
 ]
 
 [profile.release]
-rpath = true
+# rpath = false is important to make Go bindings work
+rpath = false
 lto   = true
 debug = false
 # panic = 'abort'

crates/vdf/Cargo.toml

@@ -22,11 +22,19 @@ license = "Apache-2.0"
 edition = "2018"
 description = "An implementation of Verifiable Delay Functions (VDFs) in Rust"
 
+[lib]
+crate-type = ["lib", "cdylib"]
+name = "vdf"
+
 [dependencies]
 classgroup = { path = "../classgroup", version = "^0.1.0" }
 num-traits = "0.2"
 sha2 = "0.8"
 bit-vec = "0.5"
+uniffi = {  version= "0.25", features = ["cli"]}
+
+[build-dependencies]
+uniffi = { version = "0.25", features = [ "build" ] }
 
 [dev-dependencies]
 criterion = ">=0.2"

crates/vdf/build.rs

@@ -110,6 +110,8 @@ fn main() {
         println!("cargo:rustc-link-search=/opt/homebrew/Cellar/gmp/6.3.0/lib");
     }
 
+    uniffi::generate_scaffolding("src/lib.udl").expect("uniffi generation failed");
+
     let manifest_path = env::var("OUT_DIR").expect("cargo should have set this");
     let mut path = PathBuf::from(&manifest_path);
     path.push("constants.rs");

crates/vdf/src/lib.rs

@@ -95,6 +95,8 @@ mod proof_of_time;
 mod proof_pietrzak;
 mod proof_wesolowski;
 
+uniffi::include_scaffolding!("lib");
+
 /// An empty struct indicating verification failure.
 ///
 /// For security reasons, the functions that perform verification *do not*
@@ -243,3 +245,17 @@ pub trait VDF: Send + Debug {
         alleged_solution: &[u8],
     ) -> Result<(), InvalidProof>;
 }
+
+/// Solve and prove with the Wesolowski VDF using the given parameters.
+/// Outputs the concatenated solution and proof (in this order).
+pub fn wesolowski_solve(int_size_bits: u16, challenge: &[u8], difficulty: u64) -> Vec<u8> {
+    let vdf = WesolowskiVDFParams(int_size_bits).new();
+    vdf.solve(challenge, difficulty).expect("invalid difficulty")
+}
+
+/// Verify with the Wesolowski VDF using the given parameters.
+/// `alleged_solution` is the output of `wesolowski_solve`.
+pub fn wesolowski_verify(int_size_bits: u16, challenge: &[u8], difficulty: u64, alleged_solution: &[u8]) -> bool {
+    let vdf = WesolowskiVDFParams(int_size_bits).new();
+    vdf.verify(challenge, difficulty, alleged_solution).is_ok()
+}

crates/vdf/src/lib.udl

@@ -0,0 +1,4 @@
+namespace vdf {
+    sequence<u8> wesolowski_solve(u16 int_size_bits, [ByRef] sequence<u8> challenge, u64 difficulty);
+    boolean wesolowski_verify(u16 int_size_bits, [ByRef] sequence<u8> challenge, u64 difficulty, [ByRef] sequence<u8> alleged_solution);
+};

vdf/.gitignore

@@ -0,0 +1 @@
+generated

vdf/generate.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+set -euxo pipefail
+
+SCRIPT_DIR="${SCRIPT_DIR:-$( cd "../$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )}"
+ROOT_DIR="$SCRIPT_DIR"
+
+RUST_VDF_PACKAGE="$ROOT_DIR/crates/vdf"
+BINDINGS_DIR="$ROOT_DIR/vdf"
+
+# Build the Rust VDF package in release mode
+RUSTFLAGS='-L /opt/homebrew/Cellar/gmp/6.3.0/lib' cargo build -p vdf --release
+
+# Generate Go bindings
+pushd "$RUST_VDF_PACKAGE" > /dev/null
+uniffi-bindgen-go src/lib.udl -o "$BINDINGS_DIR"/generated

vdf/go.mod

@@ -0,0 +1,3 @@
+module "source.quilibrium.com/quilibrium/cermonyclient/vdf"
+
+go 1.20

vdf/test.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+set -euxo pipefail
+
+SCRIPT_DIR="${SCRIPT_DIR:-$( cd "../$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )}"
+ROOT_DIR="$SCRIPT_DIR"
+
+BINDINGS_DIR="$ROOT_DIR/vdf"
+BINARIES_DIR="$ROOT_DIR/target/release"
+
+go generate
+
+# Test the generated bindings
+pushd "$BINDINGS_DIR" > /dev/null
+LD_LIBRARY_PATH="${LD_LIBRARY_PATH:-}:$BINARIES_DIR" \
+	CGO_LDFLAGS="-lvdf -L$BINARIES_DIR -ldl" \
+	CGO_ENABLED=1 \
+	LC_RPATH="$BINARIES_DIR" \
+  go test

vdf/vdf.go

@@ -0,0 +1,19 @@
+package vdf
+
+import (
+	generated "source.quilibrium.com/quilibrium/cermonyclient/vdf/generated/vdf"
+)
+
+//go:generate ./generate.sh
+
+// WesolowskiSolve Solve and prove with the Wesolowski VDF using the given parameters.
+// Outputs the concatenated solution and proof (in this order).
+func WesolowskiSolve(intSizeBits uint16, challenge []uint8, difficulty uint64) []uint8 {
+	return generated.WesolowskiSolve(intSizeBits, challenge, difficulty)
+}
+
+// WesolowskiVerify Verify with the Wesolowski VDF using the given parameters.
+// `allegedSolution` is the output of `WesolowskiSolve`.
+func WesolowskiVerify(intSizeBits uint16, challenge []uint8, difficulty uint64, allegedSolution []uint8) bool {
+	return generated.WesolowskiVerify(intSizeBits, challenge, difficulty, allegedSolution)
+}

vdf/vdf_test.go

@@ -0,0 +1,17 @@
+package vdf_test
+
+import (
+	"source.quilibrium.com/quilibrium/cermonyclient/vdf"
+	"testing"
+)
+
+const intSizeBits = uint16(2048)
+const difficulty = uint64(10000)
+
+func TestProveVerify(t *testing.T) {
+	solution := vdf.WesolowskiSolve(intSizeBits, []byte{0x01, 0x02, 0x03}, difficulty)
+	isOk := vdf.WesolowskiVerify(intSizeBits, []byte{0x01, 0x02, 0x03}, difficulty, solution)
+	if !isOk {
+		t.Errorf("WesolowskiVerify failed")
+	}
+}