Unable to pull block based off old MultiSignature in V3

[zadmarbella]

Testing on westend Westend is using MultiAddress https://github.com/paritytech/polkadot/blob/master/runtime/westend/src/lib.rs#L815

Not seeing the issue in v2 but it's there in v3.

snippet used to test:

    api := NewSubstrateAPI()
    metadata := GetMetadataLatest(api)

    types.SetSerDeOptions(types.SerDeOptions{NoPalletIndices: true})
    fmt.Println("BXL: SetSerDeOptions: ")

    key, err := types.CreateStorageKey(metadata, "System", "Events", nil, nil)
    if err != nil {
        panic(err)
    }

    // blockNumber 3443522  westend testing 
    blockNumber := uint64(3443522)
    blockHash, err := api.RPC.Chain.GetBlockHash(blockNumber)
    // blockHash, err := api.RPC.Chain.GetBlockHashLatest()
    if err != nil {
        return err
    }

    raw, err := api.RPC.State.GetStorageRaw(key, blockHash)
    if err != nil {
        panic(err)
    }

    //fmt.Printf("%x\n", *raw)

    events := types.EventRecords{}
    err = types.EventRecordsRaw(*raw).DecodeEventRecords(metadata, &events)
    if err != nil {
        panic(err)
    }

    // fmt.Println("BXL: readBlockUsingCentrifuge: blockHash: ", blockHash.Hex())
    // Get the block
    block, err := api.RPC.Chain.GetBlock(blockHash)
    if err != nil {
        panic(err)
    }

[vedhavyas]

This is happening because the block requested above was added pre-multiaddress. Since v3 doesn't have backward compatibility with v2, its fails on v3 but goes through on v2

[cdamian]

Closing this for now, please let us know if this is still something that you need help with.