More helpful error message when the user supplies a raw wasm module

[abizjak]

Description

When the user supplies a raw wasm module to module deploy the error message is not the most descriptive

Error: Supplied file 'piggy_bank_part1.wasm' cannot be parsed as a smart contract module to be deployed:

This would happen if the user built a wasm module without the version information and did not supply the --contract-version flag.

It would be good if this common case was covered by a more helpful error message.

Steps to Reproduce

Try to deploy a wasm module without supplying the --contract-version flag.

Expected Result

A helpful error message pointing out the common causes for the failure.

Actual Result

Error: Supplied file 'piggy_bank_part1.wasm' cannot be parsed as a smart contract module to be deployed:

Versions

• Software Version: 4.*

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