René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"`writeCallFunction` fails with array parameters due to `value` field typed as String","articleBody":"The `ParameterWithValue.value` field is typed as `String`, offering no obvious way to pass an array. \n\nIf the array is serialized as JSON string it is serialized again, causing it to be double escaped. This causes 500 errors when calling contract functions with array parameters.\n\n## Environment\n- Fireblocks Java SDK version: 13.0.0.\n- Java: 21\n\n## Reproduction\n```kotlin\n// Kotlin\nval addresses = listOf(\"0x2838a9dcc507c5ea4f07ca68a15ec53d1e5911a0\", \"0x07c5fb2c857fca6b53856c6e30556a865858d167\")\nval dto = WriteCallFunctionDto(\n    vaultAccountId,\n    WriteCallFunctionDtoAbiFunction(\n        WriteAbiFunction(\n            WriteAbiFunction.StateMutabilityEnum.NONPAYABLE,\n            WriteAbiFunction.TypeEnum.FUNCTION,\n            listOf(\n                ParameterWithValue(\"accounts\", \"address[]\").apply {\n                    value = objectMapper.writeValueAsString(addresses)\n                },\n            ),\n        ).apply {\n            name = \"batchAddBlacklist\"\n            outputs = listOf()\n        },\n    ),\n)\nclient.contractInteractions().writeCallFunction(dto, contractAddress, assetId, idempotencyKey)\n```\n\n## Actual Behavior\nThe `value` field is serialized as an escaped JSON string:\n```json\n{\n  \"inputs\": [{\n    \"name\": \"accounts\",\n    \"type\": \"address[]\",\n    \"value\": \"[\\\"0xabc...\\\",\\\"0xdef...\\\"]\"\n  }]\n}\n```\n\n## Expected Behavior\nThe `value` field should be a native JSON array:\n```json\n{\n  \"inputs\": [{\n    \"name\": \"accounts\",\n    \"type\": \"address[]\",\n    \"value\": [\"0xabc...\", \"0xdef...\"]\n  }]\n}\n```\n\n## Root Cause\n`ParameterWithValue.value` is typed as `String`, forcing array values to be double-serialized.\n\n## Solution\nChange `ParameterWithValue.value` from `String` to `Object` to support both primitive values and complex types (arrays, objects).\n\n## Workaround\nRaw HTTP requests with manually constructed JSON work correctly, but that is sidestepping the whole SDK.","author":{"url":"https://github.com/febeling","@type":"Person","name":"febeling"},"datePublished":"2025-12-01T14:03:26.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/117/java-sdk/issues/117"}