Issues creating RuntimeDispatchInfo type when using queryInfo

[TarikGul]

• I'm submitting a ...

• Bug report
• Feature request
• Support request
• Other

• What is the current behavior and expected behavior?

When using rpc.payment.queryInfo against certain blocks on westend there is the following decoding error:

RPC-CORE: queryInfo(extrinsic: Bytes, at?: BlockHash): RuntimeDispatchInfo:: createType(RuntimeDispatchInfo):: Struct: failed on weight: u64:: Assertion failed

Reproduction

const main = async () => {
    const api = await ApiPromise.create({
        provider: new WsProvider('wss://westend-rpc.polkadot.io'),
    });

    // Extrinsic is from block 12604391, blockhash is for block 12604390
    const extrinsic = '0x310284009ba31d1bca2c1123f67c012b86cceef3c8333fa2370a7e9f3ba7fe88b8600082009849e1cd980414a560e310bed2b2d82e9a4392eac0dc52245fd9fce31eef126c9a984511d1e0dec3f9b20b4846a12fe9d1ca47b4886c4316fe04d61bf656980e2b3e4d05000403002f833023f0254be1362a880c1e74bd1d2e1348b216201749b4f8d5191b1d17b400'
    const blockHash = '0xecc5770387f776b64a73f3614666a41fc325a81f3e029bc45fe684cc84103cf5';
    const result = await api.rpc.payment.queryInfo(extrinsic, blockHash);
    console.log('queryInfo: ', result.toJSON());

};

main().finally(() => process.exit());

This is happening on westend currently as far as I know, and here are some additional blocks:
12604449
12604804

• What is the motivation for changing the behavior?

• Please tell us about your environment:

• Version:
  @polkadot/api@9.3.3

• Environment:

  • Node.js v17.1
  • Browser
  • Other (limited support for other environments)

• Language:

  • JavaScript (I reproduced in Typescript and Javascript)
  • TypeScript (include tsc --version) 4.8.2
  • Other

[niklasad1]

This is probably because the weight type in substrate was changed from u64 -> struct Weight { ref_time: u64 }

See paritytech/substrate#12138

[lcovar]

Any update? We're unable to continue indexing blocks due to this.

[jacogr]

I am looking at solutions - these are deceptively tricky since RPCs are not fully-specified with metadata/types and needs tweaks on a version basis without breaking compat for all chains. Hopefully a solution will present itself before a point release over the weekend.

[polkadot-js-bot]

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