When catches events, happened error.

[satellitex]

polkadot-js version is 0.79.1

When I try a sample code.
https://polkadot.js.org/api/examples/promise/08_system_events/

I happened error below.

Unable to decode Uint8Array for type 'Phase': Unable to create Enum via index 4, in ApplyExtrinsic, Finalization
Unable to decode Uint8Array for type 'EventRecord': Unable to create Enum via index 4, in ApplyExtrinsic, Finalization
Unable to decode Uint8Array for type 'EventRecord': Unable to create Enum via index 4, in ApplyExtrinsic, Finalization
Unable to decode Uint8Array for type 'EventRecord': Unable to create Enum via index 4, in ApplyExtrinsic, Finalization
Unable to decode Uint8Array for type 'Phase': Unable to create Enum via index 42, in ApplyExtrinsic, Finalization
Unable to decode Uint8Array for type 'EventRecord_0_76': Unable to create Enum via index 42, in ApplyExtrinsic, Finalization
Unable to decode Uint8Array for type 'EventRecord_0_76': Unable to create Enum via index 42, in ApplyExtrinsic, Finalization
Unable to decode Uint8Array for type 'EventRecord_0_76': Unable to create Enum via index 42, in ApplyExtrinsic, Finalization
Unable to decode storage system.events: Unable to create Enum via index 42, in ApplyExtrinsic, Finalization
2019-06-05 16:19:00        RPC-CORE: subscribeStorage (keys: Vec<StorageKey>): StorageChangeSet:: Unable to create Enum via index 42, in ApplyExtrinsic, Finalization

[jacogr]

Could you please upgrade to 0.80.1

These issues are generally caused by the node version being ahead in terms of metadata support.

The same code, with the latest API running - https://polkadot.js.org/apps/#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

[satellitex]

@jacogr Thank you!
But, I have a error yet.
I execute my substrate project node on substrate v1.0.0rc2.

Unable to decode Uint8Array for type 'Phase': Unable to create Enum via index 4, in ApplyExtrinsic, Finalization
Unable to decode Uint8Array for type 'EventRecord': Unable to create Enum via index 4, in ApplyExtrinsic, Finalization
Unable to decode Uint8Array for type 'EventRecord': Unable to create Enum via index 4, in ApplyExtrinsic, Finalization
Unable to decode Uint8Array for type 'EventRecord': Unable to create Enum via index 4, in ApplyExtrinsic, Finalization
Unable to decode Uint8Array for type 'Phase': Unable to create Enum via index 9, in ApplyExtrinsic, Finalization
Unable to decode Uint8Array for type 'EventRecord_0_76': Unable to create Enum via index 9, in ApplyExtrinsic, Finalization
Unable to decode Uint8Array for type 'EventRecord_0_76': Unable to create Enum via index 9, in ApplyExtrinsic, Finalization
Unable to decode Uint8Array for type 'EventRecord_0_76': Unable to create Enum via index 9, in ApplyExtrinsic, Finalization
Unable to decode storage system.events: Unable to create Enum via index 9, in ApplyExtrinsic, Finalization
2019-06-05 17:29:40        RPC-CORE: subscribeStorage (keys: Vec<StorageKey>): StorageChangeSet:: Unable to create Enum via index 9, in ApplyExtrinsic, Finalization

[jacogr]

Node template or the substrate v1.0 branch?

EDIT: Tested locally against -

• Alexander (substrate 1.0-based)
• Substrate master
• Substrate v1.0 branch

[satellitex]

@jacogr
I still get errors. And sorry, I don't say information.

I run two nodes simultaneously.

substrate node A

./target/debug/a --base-path /tmp/a --port 30333 --ws-port 9944 --dev

substrate node B

./target/debug/b --base-path /tmp/b --port 30334 --ws-port 9955 --dev

I listen to events from both by using ApiPromise.
const nodeA = await ApiPromise.create({ provider: new WsProvider(ws://127.0.0.1:9944)
const nodeB = await ApiPromise.create({ provider: new WsProvider(ws://127.0.0.1:9955)

[jacogr]

What happens when you run 1 Node? Are both binaries the the same version with the same Metadata?

[satellitex]

What happens when you run 1 Node?

I get error too when 1 Node issue to events.

Unable to decode Uint8Array for type 'Phase': Unable to create Enum via index 4, in ApplyExtrinsic, Finalization
Unable to decode Uint8Array for type 'EventRecord': Unable to create Enum via index 4, in ApplyExtrinsic, Finalization
Unable to decode Uint8Array for type 'EventRecord': Unable to create Enum via index 4, in ApplyExtrinsic, Finalization
Unable to decode Uint8Array for type 'EventRecord': Unable to create Enum via index 4, in ApplyExtrinsic, Finalization

But after that, I was able to get the intended event when 1 node.
1 node case, RPC-CORE: subscribeStorage (keys: Vec<StorageKey>): StorageChangeSet:: Unable to create Enum via index 9, in ApplyExtrinsic, Finalization error is not found.

Are both binaries the the same version with the same Metadata?

No. Specifically, I use these two nodes.
https://github.com/stakedtechnologies/Plasm/blob/fix-divide-plasm-nodes/child/src/main.rs
https://github.com/stakedtechnologies/Plasm/blob/fix-divide-plasm-nodes/src/main.rs

[jacogr]

Ok, so these are custom nodes, substrate master. Which means that the metadata exposed does not contain all the information required, i.e. In the Phase, there are extra event types, not just these - https://github.com/paritytech/substrate/blob/9687db56516ef573f650dadc030315b78d708cc4/srml/system/src/lib.rs#L210

The issue with those are that they are not exposed by the runtime metadata, so you would need to provide your own overrides for the Phase type.

[satellitex]

@jacogr thanks!
How do I override Phase type on SubstrateNode or js codes?

[jacogr]

Could you point me to where you made changes to the events?

[satellitex]

@jacogr
Substrate codes are
https://github.com/stakedtechnologies/Plasm/blob/fix-divide-plasm-nodes/core/parent/src/mvp.rs#L350

And, js codes are
https://github.com/stakedtechnologies/plasm-client/blob/master/packages/operator/lib/ChainManager.js#L27

[jacogr]

I don't see that you actually expose the events here - https://github.com/stakedtechnologies/Plasm/blob/fix-divide-plasm-nodes/runtime/src/lib.rs#L224

So they probably are not making it into metadata.

Compare to substrate itself - all events needs to be exposed (some modules have some tweaks, e.g. Balances) - if not, parsing of the event data cannot occur. (The info does not make it into metadata)

https://github.com/paritytech/substrate/blob/9687db56516ef573f650dadc030315b78d708cc4/node/runtime/src/lib.rs#L235

[satellitex]

I think that construct_runtime! automaticaly exposes Module, Call, Storage, Event<T>, Config<T> if it doesn't specify any types.
Said by https://docs.substrate.dev/docs/construct_runtime#section-no-types-or-default-

[jacogr]

Do a query for the metadata (can do it via polkadot.js.org/apps -> toolbox -> rpc -> state.getMetadata - it displays the parsed result, which is easy to inspect and check) and ensure it is in there. (You can just paste the whole JSON result here as well)

Everything in the API is dynamic as the runtime metadata tells it - if the data is not there, it doesn't know what to do.

[satellitex]

I can get metadata JSON.
https://gist.github.com/satellitex/b11b1de8c95b059a98897fd9bb7a9b06

Are Exposed events this?
https://gist.github.com/satellitex/b11b1de8c95b059a98897fd9bb7a9b06#file-plasm_parent_metadata-json-L891