Error while initializing the virtual machine: Instantiation: Couldn't resolve env:ext_trie_blake2_256_ordered_root_version_2

[librelois]

Hello,

I develop a standalone substrate chain, the repository here: https://git.duniter.org/nodes/rust/duniter-v2s

Our specific developments are runtime only, and we use BABE/GRANDPA for our consensus, so in theory smoldot should be a working client on our blockchain.

I just tested smoldot on a chain that I bootstrap locally and I have the following error:

$ npm start

> @duniter/duniter-v2s-light@0.0.1 start /home/elois/dev/duniter/duniter-v2s/light
> node index.js

JSON-RPC server now listening on port 9946
Please visit: https://polkadot.js.org/apps/?rpc=ws%3A%2F%2F127.0.0.1%3A9946

Error while adding chain: Error: Failed to build genesis chain information: Error while initializing the virtual machine: Instantiation: Couldn't resolve `env`:`ext_trie_blake2_256_ordered_root_version_2`
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! @duniter/duniter-v2s-light@0.0.1 start: `node index.js`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the @duniter/duniter-v2s-light@0.0.1 start script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /home/elois/.npm/_logs/2022-01-30T21_39_42_587Z-debug.log

I guess it's just the latest release of @substrate/smoldot-light which is not up to date with substrate (we use the monthly-2022-01 version of substrate).

But maybe it's a bug?

[librelois]

I cloned and compiled smoldot on the main branch (commit bc5d27b), and I have exactly the same error.

[librelois]

It seems that the problem comes from the fact that substrate has recently introduced a v2 of some host function and that it is not yet implemented in smoldot:

paritytech/substrate#9732

I reverted this PR on my substrate fork and bootstrapped a new currency, this time smoldot is able to load my runtime and connect to my substrate node in p2p, but as soon as I try to submit a transaction I get an error, I open another issue for that.

[tomaka]

Thanks!

I wasn't aware that this Substrate PR had new host functions
Opened #1967 and #1968

[tomaka]

Closing as fixed