René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Issue when wallet_index is not 0","articleBody":"Upon trying to implemnt Jupiter Ultra API using this example [standalone_script_examples/ultra-api/order-and-execute/main.py](https://github.com/Jupiter-DevRel/python-examples/blob/e676ab6f625079c131812459b1a42a47c2ad6c8d/standalone_script_examples/ultra-api/order-and-execute/main.py). It works from SOL to USDC (`So11111111111111111111111111111111111111112` -\u003e `EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v`), however when I try going back USDC -\u003e SOL, I am getting the following error\n\n```\n    signed_transaction = VersionedTransaction(raw_transaction.message, signers)\nTypeError: argument 'keypairs': failed to extract enum Signer ('KeypairWrapper | PresignerWrapper | NullSignerWrapper')\n- variant KeypairWrapper (KeypairWrapper): TypeError: failed to extract field Signer::KeypairWrapper.0, caused by TypeError: 'Signature' object cannot be converted to 'Keypair'\n- variant PresignerWrapper (PresignerWrapper): TypeError: failed to extract field Signer::PresignerWrapper.0, caused by TypeError: 'Signature' object cannot be converted to 'Presigner'\n- variant NullSignerWrapper (NullSignerWrapper): TypeError: failed to extract field Signer::NullSignerWrapper.0, caused by TypeError: 'Signature' object cannot be converted to 'NullSigner'\n```\n\nI have discovered that the issue is linked to the index of my (signer) wallet. When it's the first one (`wallet_index == 0`), it works. When `wallet_index \u003e 0` (aka `wallet_index == 1`) this issue occurs.\n\nList of signers than looks like this\n```\n[Signature(\n    1111111111111111111111111111111111111111111111111111111111111111,\n), Keypair(\n    Keypair(\n        Keypair {\n            secret: SecretKey: [...],\n            public: PublicKey(CompressedEdwardsY: [...]), EdwardsPoint{\n                X: FieldElement51([...]),\n                Y: FieldElement51([...]),\n                Z: FieldElement51([...]),\n                T: FieldElement51([...])\n            }),\n        },\n    ),\n)]\n```\n\nCan you please advise how to swap in the opposite direction? Thanks\n\nI have checked also the example in [standalone_script_examples/ultra-api/sell-everything-back-to-sol/main.py](https://github.com/Jupiter-DevRel/python-examples/blob/e676ab6f625079c131812459b1a42a47c2ad6c8d/standalone_script_examples/ultra-api/sell-everything-back-to-sol/main.py#L75) and the issue is the same.\n\n","author":{"url":"https://github.com/fniko","@type":"Person","name":"fniko"},"datePublished":"2025-10-09T19:09:05.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":3},"url":"https://github.com/3/python-examples/issues/3"}