Merge pull request #1 from PR0M3TH3AN/codex/start-building-project-with-mvp

feat(cli): basic tests and CI workflow

.github/workflows/ci.yml

@@ -0,0 +1,18 @@
+name: CI
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          override: true
+      - name: Cargo test
+        run: cargo test --locked --all

README.md

@@ -31,7 +31,12 @@ cargo build --release
 sudo install -m755 target/release/private_proof_of_reserve_cli /usr/local/bin/por
 ```
 
----
+## Running tests
+
+```bash
+cargo test
+```
+
 
 \## Running a local Bitcoin node
 

src/main.rs

@@ -1,3 +1,4 @@
+#![forbid(unsafe_code)]
 //! Prototype CLI for a lower-bound Bitcoin proof-of-reserve.
 //! SECURITY:  demo code only.
 
@@ -158,3 +159,27 @@ fn verify_proof(pf: &Proof, rpc_url: &str, rpc_user: &str, rpc_pass: &str) -> Re
     let _ = RangeProof::from_bytes(&base64::decode(&pf.range_proof)?)?;
     Ok(())
 }
+
+// ── tests ───────────────────────────────────────────────────
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn merkle_root_single_leaf() {
+        let leaf = [42u8; 32];
+        assert_eq!(merkle_root(vec![leaf]), leaf);
+    }
+
+    #[test]
+    fn merkle_root_two_leaves() {
+        let a = [1u8; 32];
+        let b = [2u8; 32];
+        let mut h = Sha256::new();
+        h.update(a);
+        h.update(b);
+        let expected: [u8; 32] = h.finalize().into();
+        assert_eq!(merkle_root(vec![a, b]), expected);
+    }
+}