Cannot read properties of undefined (reading 'toHuman')

[ioannist]

• I'm submitting a bug

• [ x] Bug report
• [ ] Feature request
• [ ] Support request
• [ ] Other

• What is the current behavior and expected behavior?

for events and extrinsics: GenericExtrinsic<AnyTuple> EventRecord.event: Event calling e.toJSON() works fine

calling e.toHuman()

 error: Error: Error in processBlockRange pipe: Error: Error in fetchBlockData: TypeError: Cannot read properties of undefined (reading 'toHuman')
      at file:///root/stakexyz-worker/indexer-activities/src/indexer.ts:138:48
      at Observable.init [as _subscribe] (/root/stakexyz-worker/indexer-activities/node_modules/rxjs/dist/cjs/internal/observable/throwError.js:8:64)
      at Observable._trySubscribe (/root/stakexyz-worker/indexer-activities/node_modules/rxjs/dist/cjs/internal/Observable.js:41:25)
      at /root/stakexyz-worker/indexer-activities/node_modules/rxjs/dist/cjs/internal/Observable.js:35:31
      at Object.errorContext (/root/stakexyz-worker/indexer-activities/node_modules/rxjs/dist/cjs/internal/util/errorContext.js:22:9)
      at Observable.subscribe (/root/stakexyz-worker/indexer-activities/node_modules/rxjs/dist/cjs/internal/Observable.js:26:24)
      at /root/stakexyz-worker/indexer-activities/node_modules/rxjs/dist/cjs/internal/operators/catchError.js:17:31
      at OperatorSubscriber._this._error (/root/stakexyz-worker/indexer-activities/node_modules/rxjs/dist/cjs/internal/operators/OperatorSubscriber.js:43:21)
      at Subscriber.error (/root/stakexyz-worker/indexer-activities/node_modules/rxjs/dist/cjs/internal/Subscriber.js:60:18)
      at Subscriber._error (/root/stakexyz-worker/indexer-activities/node_modules/rxjs/dist/cjs/internal/Subscriber.js:84:30)
      at Subscriber.error (/root/stakexyz-worker/indexer-activities/node_modules/rxjs/dist/cjs/internal/Subscriber.js:60:18)
      at Subscriber._error (/root/stakexyz-worker/indexer-activities/node_modules/rxjs/dist/cjs/internal/Subscriber.js:84:30)
      at Subscriber.error (/root/stakexyz-worker/indexer-activities/node_modules/rxjs/dist/cjs/internal/Subscriber.js:60:18)
      at Subscriber._error (/root/stakexyz-worker/indexer-activities/node_modules/rxjs/dist/cjs/internal/Subscriber.js:84:30)
      at Subscriber.error (/root/stakexyz-worker/indexer-activities/node_modules/rxjs/dist/cjs/internal/Subscriber.js:60:18)
      at Subscriber._error (/root/stakexyz-worker/indexer-activities/node_modules/rxjs/dist/cjs/internal/Subscriber.js:84:30),
  durationMs: 1673
}

This used to work in v10.11.2 and i think it broke in 10.13.1

• Version:

• Environment:

  • [x ] Node.js
  • [ ] Browser
  • [ ] Other (limited support for other environments)

• Language:

  • [ ] JavaScript
  • [ x] TypeScript (node18)
  • [ ] Other

[TarikGul]

Can you provide a reproducible example, that would help a lot with narrowing this down.

[ioannist]

Can you provide a reproducible example, that would help a lot with narrowing this down.

import { ApiPromise, WsProvider } from "@polkadot/api";
import { Vec } from "@polkadot/types";
import { EventRecord } from "@polkadot/types/interfaces";

(async () => {
  try {
    console.log('Results to-> TypeError: Cannot read properties of undefined (reading \'toHuman\') in >=10.13.1')

    const provider = new WsProvider('wss://moonbeam.unitedbloc.com');
    const api = await ApiPromise.create({ provider, throwOnConnect: true });

    for (let blockNumber = 1000000; blockNumber < 1001000; blockNumber++) {
      const hash = await api.rpc.chain.getBlockHash(blockNumber);
      const apiAt = await api.at(hash);

      const allRecords = await apiAt.query.system.events() as Vec<EventRecord>;

      for (const record of allRecords) {
        record.event.toHuman()
      }

      const signedBlock = await api.rpc.chain.getBlock(hash);

      for (let extrinsicIndex = 0; extrinsicIndex < signedBlock.block.extrinsics.length; extrinsicIndex++) {
        const extrinsic = signedBlock.block.extrinsics[extrinsicIndex];
        extrinsic.toHuman()
      }
    }
  } catch (err) {
    console.error(err)
    throw err;
  }
})();

[TarikGul]

Fix will be included in Mondays release

[polkadot-js-bot]

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