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Unable to decode storage system.events for Kusama block 92874

See original GitHub issue

I get the following at block 92874 (polkascan)

Unable to decode storage system.events: createType(Vec<EventRecord>):: Struct: failed on 'data':: Unable to create Enum via index 15, in Normal, Operational
2020-01-21 18:13:29        RPC-CORE: getStorage(key: StorageKey, at?: BlockHash): StorageData:: createType(Vec<EventRecord>):: Struct: failed on 'data':: Unable to create Enum via index 15, in Normal, Operational
2020-01-21 18:13:29            MAIN: Error: getStorage(key: StorageKey, at?: BlockHash): StorageData:: createType(Vec<EventRecord>):: Struct: failed on 'data':: Unable to create Enum via index 15, in Normal, Operational
    at CatchSubscriber.pipe.error [as selector] (/home/thib/github/paritytech/Nomidot/node_modules/@polkadot/rpc-core/index.js:193:38)
    at CatchSubscriber.error (/home/thib/github/paritytech/Nomidot/node_modules/rxjs/src/internal/operators/catchError.ts:132:23)
    at MapSubscriber._next (/home/thib/github/paritytech/Nomidot/node_modules/rxjs/src/internal/operators/map.ts:86:24)
    at MapSubscriber.Subscriber.next (/home/thib/github/paritytech/Nomidot/node_modules/rxjs/src/internal/Subscriber.ts:99:12)92874
    at SwitchMapSubscriber.notifyNext (/home/thib/github/paritytech/Nomidot/node_modules/rxjs/src/internal/operators/switchMap.ts:172:24)
    at InnerSubscriber._next (/home/thib/github/paritytech/Nomidot/node_modules/rxjs/src/internal/InnerSubscriber.ts:17:17)
    at InnerSubscriber.Subscriber.next (/home/thib/github/paritytech/Nomidot/node_modules/rxjs/src/internal/Subscriber.ts:99:12)
    at CombineLatestSubscriber.notifyNext (/home/thib/github/paritytech/Nomidot/node_modules/rxjs/src/internal/observable/combineLatest.ts:313:26)
    at InnerSubscriber._next (/home/thib/github/paritytech/Nomidot/node_modules/rxjs/src/internal/InnerSubscriber.ts:17:17)
    at InnerSubscriber.Subscriber.next (/home/thib/github/paritytech/Nomidot/node_modules/rxjs/src/internal/Subscriber.ts:99:12)

Reproducible in the js console. With the block before all good, the 92874 fails:

async function logMethod(blockHash){
  const events = await api.query.system.events.at(blockHash);
  events.map(
        ({ event: { method } }) =>
          console.log('method',method)
      );
}

const blockHashFine = "0x88bfb8baf0e8e5e192b911b80aed45e49f27b50fa91d217a2ca71c6dd1e2c53d"; //92873 working fine
const blockHashFailing = "0xc67e368912d8b0a824f917fff7ef3885e4bf867f07df99441368eb234b05b4ab"; //92874 failing

logMethod(blockHashFine).catch(e => console.error(e));
logMethod(blockHashFailing).catch(e => console.error(e));

Issue Analytics

State:
Created 4 years ago
Comments:7 (6 by maintainers)

Top GitHub Comments

2reactions

jacogrcommented, Jan 22, 2020

It is the types, specifically DispatchError, as indicated above, see https://github.com/polkadot-js/api/blob/master/packages/api/src/base/typeInjector.ts#L33

(The above is NOT comprehensive, since types adjust to latest)

0reactions

polkadot-js-botcommented, Jun 4, 2021

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue if you think you have a related problem or query.