chore: regroup sent elements by collection when creataing vault

src/contracts/UserVaultV5.ts

@@ -60,8 +60,23 @@ export class UserVaultV5 extends Contract<typeof userVaultABIV5> {
     const { id: vaultId } = await this.#mintVault();
     const receipts = [];
 
-    for (let i = 0; i < nfts.length; i++) {
-      const { collection, tokenIds } = nfts[i];
+    // Regroup all elements in the same collection in case users send tokenIds as separate elements of the array
+    const groupedNfts = nfts.reduce(
+      (acc, curr) => {
+        const { collection, tokenIds } = curr;
+        const index = acc.findIndex((element) => element.collection === collection);
+        if (index === -1) {
+          acc.push({ collection, tokenIds });
+        } else {
+          acc[index].tokenIds = [...acc[index].tokenIds, ...tokenIds];
+        }
+        return acc;
+      },
+      [] as typeof nfts,
+    );
+
+    for (let i = 0; i < groupedNfts.length; i++) {
+      const { collection, tokenIds } = groupedNfts[i];
       const deposit = await this.depositERC721s({ vaultId, collection, tokenIds });
       const receipt = await deposit.waitTxInBlock();
       receipts.push(receipt);