Add Paybis webhook test and minor cleanups

Add a unit test for mapping a completed Paybis webhook that includes a payout transaction_hash (crates/fiat/src/providers/paybis/mapper.rs). Remove the #[serde(rename_all = "camelCase")] attribute from PaybisPayout (crates/fiat/src/providers/paybis/models/webhook.rs). Tidy keccak test assertions formatting (crates/gem_hash/src/keccak.rs) and adjust import ordering in Sui preload tests to avoid warnings (crates/gem_sui/src/provider/preload.rs). These changes increase test coverage and perform small formatting/import cleanups.

Author: gemcoder21

crates/fiat/src/providers/paybis/mapper.rs

@@ -373,6 +373,28 @@ mod tests {
         assert_eq!(transaction.fiat_currency, Some("EUR".to_string()));
     }
 
+    #[test]
+    fn test_map_process_webhook_completed_with_transaction_hash() {
+        let data: serde_json::Value = serde_json::from_str(include_str!("../../../testdata/paybis/webhook_transaction_completed.json")).unwrap();
+
+        let result = map_process_webhook(data).unwrap();
+        let FiatWebhook::Transaction(transaction) = result else {
+            panic!("Expected FiatWebhook::Transaction variant");
+        };
+
+        assert_eq!(
+            transaction,
+            FiatTransactionUpdate {
+                transaction_id: "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx".to_string(),
+                provider_transaction_id: Some("PBXXXXXXXXXXTXX".to_string()),
+                status: FiatTransactionStatus::Complete,
+                transaction_hash: Some("x".to_string()),
+                fiat_amount: Some(50.0),
+                fiat_currency: Some("USD".to_string()),
+            }
+        );
+    }
+
     #[test]
     fn test_verification_webhook_maps_to_none() {
         let data: serde_json::Value = serde_json::from_str(include_str!("../../../testdata/paybis/webhook_transaction_no_changes.json")).unwrap();

crates/fiat/src/providers/paybis/models/webhook.rs

@@ -18,7 +18,6 @@ pub struct PaybisWebhookData {
 }
 
 #[derive(Debug, Clone, Deserialize)]
-#[serde(rename_all = "camelCase")]
 pub struct PaybisPayout {
     pub transaction_hash: Option<String>,
 }

crates/fiat/testdata/paybis/webhook_transaction_completed.json

@@ -0,0 +1,25 @@
+{
+    "event": "TRANSACTION_STATUS_CHANGED",
+    "data": {
+        "partnerTransactionId": "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
+        "quote": {
+            "quoteId": "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
+        },
+        "transaction": {
+            "invoice": "PBXXXXXXXXXXTXX",
+            "status": "completed",
+            "flow": "buyCrypto"
+        },
+        "amountFrom": {
+            "amount": "50.00",
+            "currency": "USD"
+        },
+        "amountTo": {
+            "amount": "0.1",
+            "currency": "BTC"
+        },
+        "payout": {
+            "transaction_hash": "x"
+        }
+    }
+}

crates/gem_hash/src/keccak.rs

@@ -10,13 +10,7 @@ mod tests {
 
     #[test]
     fn test_keccak256() {
-        assert_eq!(
-            hex::encode(keccak256(b"hello")),
-            "1c8aff950685c2ed4bc3174f3472287b56d9517b9c948127319a09a7a36deac8"
-        );
-        assert_eq!(
-            hex::encode(keccak256(b"")),
-            "c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470"
-        );
+        assert_eq!(hex::encode(keccak256(b"hello")), "1c8aff950685c2ed4bc3174f3472287b56d9517b9c948127319a09a7a36deac8");
+        assert_eq!(hex::encode(keccak256(b"")), "c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470");
     }
 }

crates/gem_sui/src/provider/preload.rs

@@ -109,10 +109,10 @@ impl<C: Client + Clone> SuiClient<C> {
 #[cfg(all(test, feature = "chain_integration_tests"))]
 mod chain_integration_tests {
     use super::*;
+    use crate::models::SuiStakeStatus;
     use crate::provider::testkit::*;
     use base64::{Engine, engine::general_purpose};
     use chain_traits::ChainTransactionLoad;
-    use crate::models::SuiStakeStatus;
     use primitives::{Asset, Chain, Delegation, FeePriority, StakeType, TransactionLoadInput};
 
     #[tokio::test]