Backwards Compatibility - Failed to get Transaction Result

[austinkline]

Problem

Getting a failure while trying to parse transactions results using the crescendo preview build's backwards compatibility option

failed to get transactions by block id: client: failed to construct flow.TransactionResult entity from protobuf value: ccf convert: ccf: failed to decode: unexpected CBOR type CBOR boolean type as Authorization type"

Steps to Reproduce

This gist reproduces the failure

Acceptance Criteria

This transaction should decode correctly

[peterargue]

Hi @austinkline. the SDK uses CCF encoded events, so your update to use json backwards compatibility mode is not registered. We're looking into how to address this for CCF.

As a temporary workaround, you could use grpc directly to get the tx result, and leave the encoding version flag as its default (jsoncdc)

[austinkline]

Would there maybe be a way to switch to using JSON encoding instead of ccf temporarily? I'm not in control of that I don't think and am just using standard sdk methods

[peterargue]

it's currently not configurable. it's a simple change to switch it to jsoncdc if you wanted to try creating a custom build as a temporary workaround. just need to remove this line
https://github.com/onflow/flow-go-sdk/blob/master/access/grpc/grpc.go#L383

[peterargue]

@austinkline I just tagged v1.0.0-preview.33 which includes a change to set the encoding.

you can add the following to your client setup

	opts = append(opts, flowGrpc.WithEventEncoding(flow.EventEncodingVersionJSONCDC))

give that a try and let me know how it goes.

[austinkline]

Amazing! I'll give it a try tomorrow and report back