Runtime panicked: Bad input data provided to validate_transaction: Invalid length prefix

[metmirr]

Hello, I am using subxt to read data and submit transactions. I have the latest substrate-node-template running and I am using this example as a starter examples/balance_transfer.rs.

Error details:

Error: Rpc(ClientError(Call(Custom(ErrorObject { code: ServerError(1002), message: "Verification Error: Runtime error: Execution failed: Runtime panicked: Bad input data provided to validate_transaction: Invalid length prefix", data: Some(RawValue("RuntimeApi(\"Execution failed: Runtime panicked: Bad input data provided to validate_transaction: Invalid length prefix\")")) }))))

Additional notes: I can read storage without any issues. Also, submit transactions from the polkadot.js.org/apps

[niklasad1]

hey @metmirr

Can you please specify which substrate rev your using and the code use in examples/balance_transfer.rs?

I tried running the balance transfer against substrate b1396f and it worked fine.

Please not that the substrate node template runtime is a bit different compared to polkadot/substrate node/kusama/westend and our integration tests are executed against polkadot (every day) so it might not work reliable in all cases.

[metmirr]

Thanks for the quick reply.

I am using the main branch which uses the branch: https://github.com/paritytech/substrate/tree/polkadot-v0.9.32, I use the exact same code in balance_transfer.rs

[niklasad1]

alright, "subxt master" is only tested against the polkadot "master" so we don't really keep track of backwards compatibility with older polkadot/substrate versions.

you can find more info about that here: #626

Perhaps try some older version of subxt such as v0.25 or v0.24 might good for subxt to have such compatibility matrix, it's quite hard to get that.

[metmirr]

I see, thank you. I will close the issue then. Perhaps would it make sense to add that info to the readme. As you can guess most of the starters use node template which is pointed to some stable version of the substrate.