Starting from the processor.Block.Process all methods now return errors
if something goes wrong with unpacking of the blocks and reading the
transactions. In each function where the error is being propagated back
to client it is wrapped in a message with the function name. This makes
it easier to track down the error and see the propagation chain. Finally
the error is logged to the terminal and the go routine shuts down
gracefully. The graceful shutdown executes all deferred functions which
close the context, the checkpointer and the gateway.
Before panics were used everywhere which was an issue because the
unpacking of the blocks happened in a go routine. When a panic happens
in a go routine only the deferred functions of the go routine are called
but not those of the client which lead to unexpected behavior.
The transact function is also executed in a go routine therefore the
same typo of error handling was implemented there.
Signed-off-by: Stanislav Jakuschevskij <stas@two-giants.com>
Every struct was put in its own file. Every method which is not used
outside the parser package was given package scope. All interfaces were
removed, they are implemented by the structs which are now used
everywhere needed as return values. There is no clear benefit of using
interfaces in this sample.
Signed-off-by: Stanislav Jakuschevskij <stas@two-giants.com>
Added caching util function with tests and applied in:
- parser.Block.Transactions(),
- parser.Payload.ChannelHeader(),
- parser.Payload.SignatureHeader(),
- parser.NamespaceReadWriteSet.ReadWriteSet(),
- parser.EndorserTransaction.ReadWriteSets(),
methods, as it was in the typescript sample.
Corrected Println usage and added comments to util functions.
Signed-off-by: Stanislav Jakuschevskij <stas@two-giants.com>
Removed Block and Transaction interfaces and unused statusCode function.
Using the struct instead of the interfaces now.
Signed-off-by: Stanislav Jakuschevskij <stas@two-giants.com>
Created parser, contract and utils packages and extracted each piece of
functionality into its own files. Removed "Get" prefix from methods and
changed return values from interfaces to structs.
Signed-off-by: Stanislav Jakuschevskij <stas@two-giants.com>
