4 files changed, 53 insertions, 1 deletions
diff --git a/license-generator/Cargo.lock b/license-generator/Cargo.lock
index cee7dd9..d615538 100644
--- a/license-generator/Cargo.lock
+++ b/license-generator/Cargo.lock
@@ -147,6 +147,10 @@ dependencies = [
 ]
 
 [[package]]
+name = "paddle"
+version = "0.0.1"
+
+[[package]]
 name = "pkg-config"
 version = "0.3.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
diff --git a/license-generator/Cargo.toml b/license-generator/Cargo.toml
index 55d1a3f..99c9a3c 100644
--- a/license-generator/Cargo.toml
+++ b/license-generator/Cargo.toml
@@ -6,4 +6,7 @@ version = "0.0.1"
 fastcgi = "1.0.0"
 
 [workspace]
-members = ["aquatic-prime"]
+members = [
+	"aquatic-prime",
+	"paddle",
+]
diff --git a/license-generator/paddle/Cargo.toml b/license-generator/paddle/Cargo.toml
new file mode 100644
index 0000000..0a4f677
--- /dev/null
+++ b/license-generator/paddle/Cargo.toml
@@ -0,0 +1,5 @@
+[package]
+name = "paddle"
+version = "0.0.1"
+
+[dependencies]
diff --git a/license-generator/paddle/src/lib.rs b/license-generator/paddle/src/lib.rs
new file mode 100644
index 0000000..a1db417
--- /dev/null
+++ b/license-generator/paddle/src/lib.rs
@@ -0,0 +1,40 @@
+// https://paddle.com/docs/reference-verifying-webhooks/
+fn verify_signature<'a, I>(params: I) -> bool
+where I: ExactSizeIterator<Item = (&'a str, &'a str)> {
+    false
+}
+
+fn php_serialize<'a, I>(pairs: I) -> String
+where I: ExactSizeIterator<Item = (&'a str, &'a str)> {
+    let mut serialized = String::with_capacity(500);
+
+    serialized.push_str(
+        &format!("a:{pairs_count}:{{", pairs_count = pairs.len())
+    );
+
+    for (key, value) in pairs {
+        serialized.push_str(
+            &format!(
+                "s:{key_length}:\"{key}\";s:{value_length}:\"{value}\";",
+                key_length = key.len(),
+                key = key,
+                value_length = value.len(),
+                value = value
+            )
+        );
+    }
+
+    serialized.push_str("}");
+
+    serialized
+}
+
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn php_serialize_serializes_key_values_as_php_string() {
+    }
+}