createChannel returns unknown field

[UkrainianHulk]

createChannel returns two fields: "id" and "2", although only "id" is declared in .proto. Please explain me where the parameter "2" comes from. Data in the field "2" contains a hex string within 64 symbols.

Here is the line:

go-btfs-common/ledger/sample/demo.go

Line 53 in c8b2053

channelID, err := c.CreateChannel(ctx, channelCommit, fromSig)

Here is output:

Sorry for my english.