f - add BOLT 12 merkle test vectors

Author: jkczyz

lightning/src/offers/merkle.rs

@@ -137,3 +137,28 @@ impl<'a> Iterator for TlvStream<'a> {
 		}
 	}
 }
+
+#[cfg(test)]
+mod tests {
+	use bitcoin::hashes::{Hash, sha256};
+
+	#[test]
+	fn calculates_merkle_root_hash() {
+		// BOLT 12 test vectors
+		macro_rules! tlv1 { () => { "010203e8" } }
+		macro_rules! tlv2 { () => { "02080000010000020003" } }
+		macro_rules! tlv3 { () => { "03310266e4598d1d3c415f572a8488830b60f7e744ed9235eb0b1ba93283b315c0351800000000000000010000000000000002" } }
+		assert_eq!(
+			super::root_hash(&hex::decode(tlv1!()).unwrap()),
+			sha256::Hash::from_slice(&hex::decode("b013756c8fee86503a0b4abdab4cddeb1af5d344ca6fc2fa8b6c08938caa6f93").unwrap()).unwrap(),
+		);
+		assert_eq!(
+			super::root_hash(&hex::decode(concat!(tlv1!(), tlv2!())).unwrap()),
+			sha256::Hash::from_slice(&hex::decode("c3774abbf4815aa54ccaa026bff6581f01f3be5fe814c620a252534f434bc0d1").unwrap()).unwrap(),
+		);
+		assert_eq!(
+			super::root_hash(&hex::decode(concat!(tlv1!(), tlv2!(), tlv3!())).unwrap()),
+			sha256::Hash::from_slice(&hex::decode("ab2e79b1283b0b31e0b035258de23782df6b89a38cfa7237bde69aed1a658c5d").unwrap()).unwrap(),
+		);
+	}
+}