fix: fix client tests, query parameter names, http methods, side enum serialization

src/auth.rs

@@ -188,7 +188,6 @@ where
 #[cfg(test)]
 mod tests {
     use super::*;
-    use crate::client::ApiCreds;
 
     #[test]
     fn test_unix_timestamp() {
@@ -264,10 +263,10 @@ mod tests {
         assert!(result.is_ok());
         
         let headers = result.unwrap();
-        assert!(headers.contains_key("POLY_ADDRESS"));
-        assert!(headers.contains_key("POLY_SIGNATURE"));
-        assert!(headers.contains_key("POLY_TIMESTAMP"));
-        assert!(headers.contains_key("POLY_NONCE"));
+        assert!(headers.contains_key("poly_address"));
+        assert!(headers.contains_key("poly_signature"));
+        assert!(headers.contains_key("poly_timestamp"));
+        assert!(headers.contains_key("poly_nonce"));
     }
 
     #[test]
@@ -283,14 +282,14 @@ mod tests {
         
         // Different nonces should produce different signatures
         assert_ne!(
-            headers_1.get("POLY_SIGNATURE"),
-            headers_2.get("POLY_SIGNATURE")
+            headers_1.get("poly_signature"),
+            headers_2.get("poly_signature")
         );
         
         // But same address
         assert_eq!(
-            headers_1.get("POLY_ADDRESS"),
-            headers_2.get("POLY_ADDRESS")
+            headers_1.get("poly_address"),
+            headers_2.get("poly_address")
         );
     }
 
@@ -307,17 +306,17 @@ mod tests {
             passphrase: "test_passphrase".to_string(),
         };
         
-        let result = create_l2_headers(&signer, &api_creds, "/test", "GET", None);
+        let result = create_l2_headers::<String>(&signer, &api_creds, "/test", "GET", None);
         assert!(result.is_ok());
         
         let headers = result.unwrap();
-        assert!(headers.contains_key("POLY_API_KEY"));
-        assert!(headers.contains_key("POLY_SIGNATURE"));
-        assert!(headers.contains_key("POLY_TIMESTAMP"));
-        assert!(headers.contains_key("POLY_PASSPHRASE"));
+        assert!(headers.contains_key("poly_api_key"));
+        assert!(headers.contains_key("poly_signature"));
+        assert!(headers.contains_key("poly_timestamp"));
+        assert!(headers.contains_key("poly_passphrase"));
         
-        assert_eq!(headers.get("POLY_API_KEY").unwrap(), "test_key");
-        assert_eq!(headers.get("POLY_PASSPHRASE").unwrap(), "test_passphrase");
+        assert_eq!(headers.get("poly_api_key").unwrap(), "test_key");
+        assert_eq!(headers.get("poly_passphrase").unwrap(), "test_passphrase");
     }
 
     #[test]
@@ -333,7 +332,7 @@ mod tests {
         assert!(result.is_ok());
         
         let headers = result.unwrap();
-        let signature = headers.get("POLY_SIGNATURE").unwrap();
+        let signature = headers.get("poly_signature").unwrap();
         
         // EIP-712 signatures should be hex strings of specific length
         assert!(signature.starts_with("0x"));

src/client.rs

@@ -1328,7 +1328,7 @@ mod tests {
         let mock = server
             .mock("GET", "/sampling-markets")
             .match_query(Matcher::AllOf(vec![
-                Matcher::UrlEncoded("cursor".into(), "test_cursor".into()),
+                Matcher::UrlEncoded("next_cursor".into(), "test_cursor".into()),
             ]))
             .with_status(200)
             .with_header("content-type", "application/json")
@@ -1439,7 +1439,7 @@ mod tests {
             .mock("GET", "/price")
             .match_query(Matcher::AllOf(vec![
                 Matcher::UrlEncoded("token_id".into(), "0x123".into()),
-                Matcher::UrlEncoded("side".into(), "buy".into()),
+                Matcher::UrlEncoded("side".into(), "BUY".into()),
             ]))
             .with_status(200)
             .with_header("content-type", "application/json")
@@ -1557,10 +1557,8 @@ mod tests {
         }"#;
 
         let mock = server
-            .mock("GET", "/midpoints")
-            .match_query(Matcher::AllOf(vec![
-                Matcher::UrlEncoded("token_ids".into(), "0x123,0x456".into()),
-            ]))
+            .mock("POST", "/midpoints")
+            .with_header("content-type", "application/json")
             .with_status(200)
             .with_header("content-type", "application/json")
             .with_body(mock_response)

src/lib.rs

@@ -169,7 +169,6 @@ mod tests {
     use super::*;
     use rust_decimal::Decimal;
     use std::str::FromStr;
-    use alloy_primitives::U256;
 
     #[test]
     fn test_client_creation() {