fix receipt test

src/concrete/receipt/Receipt.sol

@@ -12,8 +12,14 @@ import {ERC1155Upgradeable as ERC1155} from
 import {OwnableUpgradeable as Ownable} from "openzeppelin-contracts-upgradeable/contracts/access/OwnableUpgradeable.sol";
 import {StringsUpgradeable as Strings} from "openzeppelin-contracts-upgradeable/contracts/utils/StringsUpgradeable.sol";
 
-/// @dev the ERC1155 URI is always the pinned metadata on ipfs.
-string constant RECEIPT_METADATA_URI = "ipfs://bafkreih7cvpjocgrk7mgdel2hvjpquc26j4jo2jkez5y2qdaojfil7vley";
+/// @dev The prefix for data URIs as base64 encoded JSON.
+string constant DATA_URI_BASE64_PREFIX = "data:application/json;base64,";
+
+// @notice The URI for the metadata of the `Receipt` contract.
+// Decodes to a simple generic receipt metadata object.
+// `{"name":"Receipt","decimals":18,"description":"A receipt for a ReceiptVault."}`
+string constant RECEIPT_METADATA_DATA_URI =
+    "eyJuYW1lIjoiUmVjZWlwdCIsImRlY2ltYWxzIjoxOCwiZGVzY3JpcHRpb24iOiJBIHJlY2VpcHQgZm9yIGEgUmVjZWlwdFZhdWx0LiJ9";
 
 /// @title Receipt
 /// @notice The `IReceiptV1` for a `ReceiptVault`. Standard implementation allows
@@ -30,7 +36,7 @@ contract Receipt is IReceiptV1, Ownable, ERC1155, ICloneableV2 {
     /// implementation in `ReceiptFactory`.
     function initialize(bytes memory data) external override initializer returns (bytes32) {
         __Ownable_init();
-        __ERC1155_init(RECEIPT_METADATA_URI);
+        __ERC1155_init(string.concat(DATA_URI_BASE64_PREFIX, RECEIPT_METADATA_DATA_URI));
 
         address initialOwner = abi.decode(data, (address));
         _transferOwnership(initialOwner);

test/src/concrete/receipt/Receipt.t.sol

@@ -2,21 +2,22 @@
 // SPDX-FileCopyrightText: Copyright (c) 2020 thedavidmeister
 pragma solidity =0.8.25;
 
-import {Receipt, RECEIPT_METADATA_URI} from "src/concrete/receipt/Receipt.sol";
+import {Receipt, RECEIPT_METADATA_DATA_URI, DATA_URI_BASE64_PREFIX} from "src/concrete/receipt/Receipt.sol";
 import {IReceiptOwnerV1} from "src/interface/IReceiptOwnerV1.sol";
 import {TestReceipt} from "test/concrete/TestReceipt.sol";
 import {TestReceiptOwner} from "test/concrete/TestReceiptOwner.sol";
 import {LibUniqueAddressesGenerator} from "../../../lib/LibUniqueAddressesGenerator.sol";
 import {ReceiptFactoryTest, Vm} from "test/abstract/ReceiptFactoryTest.sol";
 import {Base64} from "solady/utils/Base64.sol";
+import {console2} from "forge-std/Test.sol";
 
 contract ReceiptTest is ReceiptFactoryTest {
     event ReceiptInformation(address sender, uint256 id, bytes information);
 
     struct Metadata {
-        string name;
         uint256 decimals;
         string description;
+        string name;
     }
 
     function testInitialize() public {
@@ -25,17 +26,26 @@ contract ReceiptTest is ReceiptFactoryTest {
         assertEq(receipt.owner(), address(mockOwner));
     }
 
-    function testReceiptURI() external {
+    function testReceiptURI(uint256 id) external {
         // Deploy the Receipt contract
         TestReceiptOwner mockOwner = new TestReceiptOwner();
         TestReceipt receipt = createReceipt(address(mockOwner));
 
-        string memory uri = receipt.uri(0);
-
-        assertEq(uri, RECEIPT_METADATA_URI);
-
-        bytes memory uriDecoded = Base64.decode(uri);
-        bytes memory uriJsonData = vm.parseJson(string(uriDecoded));
+        string memory uri = receipt.uri(id);
+
+        uint256 uriLength = bytes(uri).length;
+        assembly ("memory-safe") {
+            mstore(uri, 29)
+        }
+        assertEq(uri, DATA_URI_BASE64_PREFIX);
+        assembly ("memory-safe") {
+            uri := add(uri, 29)
+            mstore(uri, sub(uriLength, 29))
+        }
+        assertEq(uri, RECEIPT_METADATA_DATA_URI);
+
+        string memory uriDecoded = string(Base64.decode(uri));
+        bytes memory uriJsonData = vm.parseJson(uriDecoded);
 
         Metadata memory metadataJson = abi.decode(uriJsonData, (Metadata));
         assertEq(metadataJson.description, "A receipt for a ReceiptVault.");