In this error message:

Error: There was a timeout while attempting to connect to the network.
       Check to see that your provider is valid.
       If you have a slow internet connection, try configuring a longer timeout in your Truffle config. Use the networks[networ

When passing Wasm function to the host as a callback, it's passed as an index in the table.
Wasm3 needs to provide an API to call such functions.

Given a contract like this:

import "this-library-does-not-exist";

The error message says:

Error HH411: The library this-library-does-not-exis, imported from...

We can safely disallow any use of solc below 0.4.25.

We avoid using cgo anywhere in the codebase since it causes problems with cross compilation. However, cgo would be advantageous in some cases (e.g. can use certain optimized libraries, can use libsecp256k1 bindings)

Investigate the viability of using xgo to do this. Test it on linux/osx/windows.

• https://github.com/karalabe/xgo
• https://github.com/ethereum/go-ethereum/wiki/Cross-compili

Just to let you know you have a problem with ABIEncoderV2 if you are trying to call a function that returns a struct.

Call to a member function staticPartLength() on integer