Create transaction failed with 400 Bad Request

Developer Discussion
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Hello Support. Please can you help with this “Asset is not supported under this workspace settings”. I have a very simple contract deployed, and I’m just trying to call a method on the contract via CONTRACT_CALL.

I see this below, but what do I need to do to make this work please?

Also, I see this message. Is there something that can be done with this please?
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Thanks

“Asset not supported. The asset is not supported in your workspace. It may be a testnet asset on a mainnet workspace (or vice versa). What can I do?
This issue typically occurs when submitting transactions via the API. Confirm that the correct asset ID is selected before resubmitting the transaction.”

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Hi @david.cassell it looks like the contract you’ve developed is using ETH which is a mainnet asset. Please note that only testnet assets are available in the sandbox environment as per this Help Center article

As for the banner notifying you that your sandbox environment has expired, please reach out to request for a demo and consider purchasing a starter pack - Fireblocks Pricing

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Thank you @Wilfred

So I looked at the Help Center link and tried with ETH_TEST3.

I’ve resubmitted a transaction, Can you advise on this error please?

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Regarding the sandbox expiry, I will take this up separately with other my contacts at Fireblocks. Thank you.

Related questions to all of this. You will see my issues reported here : C# .NET support please - Support - Fireblocks Developer Community and here: How to call read method using postman api create transaction method - Developer Discussion - Fireblocks Developer Community

Could you advise please on the best way to work with Fireblocks API from C# API?
As per support issues, I would like to use Open API and C# to strong define the contracts of the API. Secondly, from the second support issue how would we work with an external RPC provider, in C# and .NET?

Your experience with other clients using C# and .NET would be helpful.

Thank you
David