Unable to find Call with index [218, 168] - Westend Assethub block 13440239

[jwbd1]

Description

/blocks/13440239 fails with the following error message on Westend Assethub:

{
  "code": 500,
  "message": "createType(SignedBlock):: Struct: failed on block: {\"header\":\"Header\",\"extrinsics\":\"Vec<Extrinsic>\"}:: Struct: failed on extrinsics: Vec<Extrinsic>:: createType(ExtrinsicV4):: createType(Call):: findMetaCall: Unable to find Call with index [218, 168]/[218,168]",
  "stack": "Error: createType(SignedBlock):: Struct: failed on block: {\"header\":\"Header\",\"extrinsics\":\"Vec<Extrinsic>\"}:: Struct: failed on extrinsics: Vec<Extrinsic>:: createType(ExtrinsicV4):: createType(Call):: findMetaCall: Unable to find Call with index [218, 168]/[218,168]\n    at createTypeUnsafe (/usr/src/app/node_modules/@polkadot/types-create/cjs/create/type.js:54:22)\n    at TypeRegistry.createTypeUnsafe (/usr/src/app/node_modules/@polkadot/types/cjs/create/registry.js:230:52)\n    at RpcCore._formatOutput (/usr/src/app/node_modules/@polkadot/rpc-core/cjs/bundle.js:336:25)\n    at RpcCore._formatResult (/usr/src/app/node_modules/@polkadot/rpc-core/cjs/bundle.js:174:20)\n    at callWithRegistry (/usr/src/app/node_modules/@polkadot/rpc-core/cjs/bundle.js:195:25)\n    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)",
  "level": "error"
}

Steps to Reproduce

Request /blocks/13440239 on Westend Assethub

[Imod7]

The error is triggered with this call api.rpc.chain.getBlock(hash) (in this line of code in BlocksService.ts)

[moronyoh]

Hello !
We encountered the same issue with this height and to others: 13440261, 13440262

2026-02-03 08:13:36 error: GET /blocks/13440261 500 19ms
2026-02-03 08:13:38 error: VEC: Unable to decode on index 2 createType(ExtrinsicV4):: createType(Call):: findMetaCall: Unable to find Call with index [218, 168]/[218,168]
2026-02-03 08:13:38 error: RPC-CORE: getBlock(hash?: BlockHash): SignedBlock:: createType(SignedBlock):: Struct: failed on block: {"header":"Header","extrinsics":"Vec<Extrinsic>"}:: Struct: failed on extrinsics: Vec<Extrinsic>:: createType(ExtrinsicV4):: createType(Call):: findMetaCall: Unable to find Call with index [218, 168]/[218,168]
2026-02-03 08:13:38 error: createType(SignedBlock):: Struct: failed on block: {"header":"Header","extrinsics":"Vec<Extrinsic>"}:: Struct: failed on extrinsics: Vec<Extrinsic>:: createType(ExtrinsicV4):: createType(Call):: findMetaCall: Unable to find Call with index [218, 168]/[218,168]
 Error: createType(SignedBlock):: Struct: failed on block: {"header":"Header","extrinsics":"Vec<Extrinsic>"}:: Struct: failed on extrinsics: Vec<Extrinsic>:: createType(ExtrinsicV4):: createType(Call):: findMetaCall: Unable to find Call with index [218, 168]/[218,168]

I will follow this issue with some interest 😉

[leon-blockdaemon]

Still seeing this issue on latest sidecar release v20.14.0.

[bee344]

This is not a sidecar error but a Polkadot-JS error. The same error shows up on PJS/APPS.

It looks like a PJS/API issue, see polkadot-js/api#6239 . We'll have to wait until that's sorted out to downstream the fix to sidecar.