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>
Before all transactions were processed and when the failure was
simulated a message was printed and all the transactions still
processed. Now the store returns an error when the failure is simulated
which the listener expects so that it can gracefully shutdown the system
and close the context. The context must be closed correctly or the
checkpointer won't save the last processed transactionId to the file
system.
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>
Before when pressing 'ctrl+c' and stopping the go program non of the
deferred functions in listen.go were called. A standard procedure for
stopping goroutines with context was implemented which shuts down the
program gracefully. Logs were added to notify the user that the shutdown
was successful.
Signed-off-by: Stanislav Jakuschevskij <stas@two-giants.com>
Created packages for the flat file store and the processor and moved
functions, variables and constants from listener.go to those packages.
Encapsulated everything not used outside the packages, introduced
model.go files which later might be extracted into a model package and
renamed parser/parsedBlock.go to parser/block.go.
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>
Persisting ledger writes to the file system into the store.log file in
the application-go directory. The write values are converted from bytes
to a string when the read write sets are unwrapped in the transaction
processor.
Signed-off-by: Stanislav Jakuschevskij <stas@two-giants.com>
Added block processor struct and the process method.
Implemented getting valid transactions from the last processed index.
Added data structures needed for the store.
Decomposed the parser.Block.Transactions() method into readable chunks.
Added transaction processor struct and process method. Unwrapping
read write set data from the transaction, mapping to a new "write"
data structure and passing down to the store.
Store is an empty function and will be implemented next.
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>
Created project structure, fixed typos. Implemented connect.go and
getAllAssets.go. The latter uses an assetTransferBasic struct which
provides a simple API for basic asset operations like create, transfer,
etc.
Added transact.go with some util functions. Using google uuid package to
generate random UUIDs for the transactions.
Implemented pretty printing of JSON results.
Implemented app.go entry point with error handling. The existing
commands are getAllAssets, transact and listen. They can be called from
the command line via: "go run . <command> <command> ...". They will be
executed in order and if a command is not known an the application
panics and aborts before executing any of the commands.
Implementing listen.go. Added checkpointer, context setups, call to
BlockEvents and all the interfaces needed for parsing. Started
implementing the interfaces needed to represent a block bottom up in
structs. Finished NamespaceReadWriteSet, ReadWriteSet and
EndorserTransaction.
Signed-off-by: Stanislav Jakuschevskij <stas@two-giants.com>
The shadow plugin is now maintained by the GradleUp organization. Change
to use the current plugin ID and latest version.
Signed-off-by: Mark S. Lewis <Mark.S.Lewis@outlook.com>
The latest fabric-gateway client API release (v1.7.0) includes the gRPC error
details in the GatewayExcetion stack trace so it is not necessary to
programmatically access them to demonstrate that they are present.
This change updates the asset-transfer-basic/application-gateway-java
sample to simplify the updateNonExistentAsset example method. It also:
- Updates all samples to use the latest fabric-gateway release.
- Adds equivalent Maven POM files for fabric-gateway application samples.
Signed-off-by: Mark S. Lewis <Mark.S.Lewis@outlook.com>
For some signing implementations, such as ed25519, a non-default hash
implementation must be specified when creating the Gateway connection in
client applications. Rather than relying on the default hash algorithm,
it is probably good practice in general to specify an algorithm that is
compatible with your signing implementation.
This change explicitly specifies the hash algorithm to raise visibility
of the option to select the hash algorithm.
Signed-off-by: Mark S. Lewis <Mark.S.Lewis@outlook.com>
The removed samples make use of deprecated legacy client SDKs. They all
have equivalent samples implemented using the currently supported Fabric
Gateway client API, and are therefore redundant.
Signed-off-by: Mark S. Lewis <Mark.S.Lewis@outlook.com>
- Dependency updates
- ESLint flat configuration format, replacing deprecated configuration
- Minor fixes to compile and lint issues
- Consistent TypeScript formatting with .editorconfig
Signed-off-by: Mark S. Lewis <Mark.S.Lewis@outlook.com>
Include specific gRPC TLS implementation in dependencies instead of relying on an appropriate one to be present as a transitive dependency.
Signed-off-by: Mark S. Lewis <Mark.S.Lewis@outlook.com>
Rely on the dependencies of @hyperledger/fabric-gateway making these packages transitively available. Having explicit dependency versions in the application can cause type conflicts due to private member changes in the gRPC Client class across versions.
Also fix some missing or incorrect Node types and engines version contraints.
Signed-off-by: Mark S. Lewis <mark_lewis@uk.ibm.com>
- Updated build to use Go 1.18 since Go 1.16 is no longer supported.
- Use Java 11 in updated samples, and take advantage of new language features.
Signed-off-by: Mark S. Lewis <mark_lewis@uk.ibm.com>
Also minor implementation changes to TypeScript sample for better consistency between implementations.
Signed-off-by: Mark S. Lewis <mark_lewis@uk.ibm.com>
The off_chain_data sample fails to put data to the off-chain
database. The application does not read fetched blocks because
it uses the old interface of `addBlockListener()` to handle
block events.
This PR fixes the application to use the latest block listener
and build the off-chain database.
Signed-off-by: Yuki Kondo <yuki.kondo.ob@hitachi.com>
Update all of the Node deps to 2.2.<latest>
and regenerate existing package-lock.json files
Signed-off-by: Brett Logan <brett.t.logan@ibm.com>
Co-authored-by: Brett Logan <brett.t.logan@ibm.com>
Update application and chaincode dependendencies to use v2.0 or
later versions in package.json, build.gradle, pom.xml files.
Signed-off-by: David Enyeart <enyeart@us.ibm.com>
Have the application read the common connection profile to
build a JSON object used for the gateway connect and for
a fabric-ca client instance.
Signed-off-by: Bret Harrison <beharrison@nc.rr.com>
