notary | allows anyone to have trust over arbitrary collections | Continuous Deployment library
kandi X-RAY | notary Summary
kandi X-RAY | notary Summary
The Notary project comprises a server and a client for running and interacting with trusted collections. See the service architecture documentation for more information. Notary aims to make the internet more secure by making it easy for people to publish and verify content. We often rely on TLS to secure our communications with a web server, which is inherently flawed, as any compromise of the server enables malicious content to be substituted for the legitimate content. With Notary, publishers can sign their content offline using keys kept highly secure. Once the publisher is ready to make the content available, they can push their signed trusted collection to a Notary Server. Consumers, having acquired the publisher's public key through a secure channel, can then communicate with any Notary server or (insecure) mirror, relying only on the publisher's key to determine the validity and integrity of the received content.
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notary Examples and Code Snippets
Community Discussions
Trending Discussions on notary
QUESTION
I had cloned the cordapp-kotlin-template . I've defined a state called LoadState which looks like this:
...ANSWER
Answered 2022-Jan-24 at 04:23After our discussion in the above comments section, it appears that your states have been issued using Whitelist zone constraint.
Also looking at the code it is clear that you have not explicitly added Whitelist Zone constraints for your states. Then there remain two more possibilities by which states are issued using Whitelist Zone constraint.
One is you are using some Corda version before 4 or you have included the necessary configs to include white list zone constraints in network bootstrapper as specified here. You have two options - either start from scratch and make sure you use Corda 4.
If you cannot start from scratch follow this path to first migrate the whitelist zone constraints to signature constraints, before running your UpdateLoadFlow. You can refer to this blog which talks about constraint migration.
QUESTION
I am trying to create a POC of Corda. I was able to connect 3 nodes running in my system with different ports. But now i want to connect different vms running on different system. What I am planning to do is run two vms on two different systems as two different nodes. How do i connect them?
I am attaching my node configuration
...ANSWER
Answered 2021-Dec-28 at 13:58Easiest way to make Nodes known to eachother without using a network-map-service is to copy each node's "nodeinfo-*"-file into all other node's "additional node-infos" directory (see here ). This directory will contain all node-info files that this specific node knows about(their names, parties, ip-addresses, ports etc.) Also make sure that your vm is capable of inbound and outgoing connections like Alessandro Baffa said.
You can read up on this topic here: https://docs.r3.com/en/platform/corda/4.8/open-source/network-map.html
QUESTION
I have a Corda Infrastructure with some nodes and a (not validating) notary. They're all using a Network Map for the compatibility zone, and all the corda nodes, including the notary, download the same network-parameters file.
When executing a flow, Corda gives me an Exception because the Notary is not on the network parameters whitelist. I cannot find anything anything about that on R3 Documentation.
...ANSWER
Answered 2021-Dec-26 at 02:09Do I have to do something explicit to add Notary in network parameters whitelist?
Yeah you do. Since you are using a network-map-service your node will get its network-parameters from there.
What you'll have to do then is
- delete your current network-parameters for every Node.
- whitelist your Notary Node into your network-map-service
- restart all your Nodes so they can retrieve the new network-parameters from the network-map-service where the new Notary is assigned as such
I don't know which network-map-service exactly you use but i assume its nms by cordite. You can read up on how to whitelist a Notary here: https://gitlab.com/cordite/network-map-service/-/blob/master/FAQ.md#14-start-the-notary-node
QUESTION
I have implemented the endpoint by using DocuSign Java SDK and it is working fine but the result is a bit different in comparison to the result getting from Postman. Below is the result from Postman when calling {{baseUrl}}/v2.1/accounts/{{accountId}}/envelopes?folder_ids=out_for_signature&include=recipients&exclude=folders,powerforms
result
ANSWER
Answered 2021-Dec-16 at 00:36In C# and Java the DocuSign SDKs not yet using dynamic typing and modern techniques to build objects. The objects have to (from the nature of classic OOP design for both C# and Java) have all the various properties that can be returned, or else you will need a different object for each combination of returned data.
I have to get the same result as I get from Postman. Is there any options I need to add or remove in coding?
Well, you are getting the same results in the JSON that the SDK sends behind the scenes, but the object has additional null properties. I'm not clear why this is an issue for you. Simple null checks can be used to determine which of these have a value. You can even build your own type of dynamic objects by creating them on the fly and eliminating nulls if you really need this.
QUESTION
I am working on a Spring Batch application and I have the following doubt about what could be a smart way to handle exceptions. Following my situation: my job is composed by a single step. This single step contains a writer component that call an external API in order to write the current element on an external system. This is my writer class code:
...ANSWER
Answered 2021-Oct-24 at 18:35You can do whatever you want when the error is caught. By default, the record will simply be skipped and the job will continue to process elements.
You can write the ID inside a database, you can retry, you can state how many times you want items to be skipped before stopping, etc. The behavior is highly configurable and it depends on your outcome.
As for reading materials, I highly recommend:
https://www.baeldung.com/spring-batch-skip-logic
https://www.baeldung.com/spring-batch-retry-logic
https://www.javadevjournal.com/spring-batch/spring-batch-listeners/
QUESTION
I am working on a Java application and I have the following problem.
I have a string like this (representing the URL of an API endpoint):
...ANSWER
Answered 2021-Oct-03 at 15:17public static String replaceIdnotary(String url,String newIdnotary){
return url.replaceAll("(?<=wpcf-idnotary=)[^&]*",newIdnotary);
}
QUESTION
Network:
- PartyA, PartyB, PartyC, Notary
Scenario:
PartyB’s node is put into draining mode.
PartyA performs a transaction where PartyB and PartyC are participants (not signers)
Outcome:
- PartyA completes the transaction, gets the notary’s signature and saves the state in its vault.
- PartyB will not be informed of transaction (expected)
- PartyC will not be informed of the transaction (surprise!)
Learning:
I assume because PartyC is listed after PartyB in getParticipants() it has to wait until PartyB is back online before it will receive the transaction. This is unfortunate because PartyC gets punished because PartyB’s node is down.
Question:
Is this just a limitation of the open source version of Corda? Would Corda Enterprise behave the same way?
Thoughts:
It may be necessary to clearly inform the users of your CorDapp about this phenomenon because it creates a condition of asymmetric information that is caused by some other node on the network.
...ANSWER
Answered 2021-Sep-22 at 23:29It is a limitation of Corda Open Source. The FinalityFlow of Corda Enterprise (up until 4.x) sends the transaction - after notarisation - to all the peers and resolution is performed in parallel for increased performance. In Corda Open Source it is done in sequence.
QUESTION
I am working on a WordPress website (but I think that the problem is not strictly related to WordPress but to some string encoding problem).
Basically I have two post in a specific post type named "Notary districts". This post type have a custom field named wpcf-idnotary-district containing a string value representing the ID of an object.
Ok then I have two different POST having different format for the value of this wpcf-idnotary-district field.
I have the following situation:
POST 1: the value of wpcf-idnotary-district field is 123456 POST 2: the value of wpcf-idnotary-district field is CG7drXn9fvA%253D
Then I have an WordPress API retrieving post from this post type by this wpcf-idnotary-district ID value.
Getting the previous POST 1 from my post type using the first value it is not a problem, infact calling my API passing this ID paramether, something like this:
...ANSWER
Answered 2021-Sep-19 at 19:47CG7drXn9fvA%253D is the url encoded form of CG7drXn9fvA%3D,
% = %25
you can decode this in postman itself.
Just copy the text to any part like body , url etc select the text and right click and select decode.
QUESTION
I have a corda network running on a VM on Azure with two parties and a notary. I would like to deploy the spring boot APIs, but not sure how to do that and where.
Any link to documentations or help is appreciated.
...ANSWER
Answered 2021-Sep-15 at 00:55You just need to deploy it anywhere you want - in the same VM of your Corda node or another one. The only thing you need to take care of is the configuration of RPC connection in the node.conf, where you set the RPC settings and users, like this example:
QUESTION
I am working on a Spring Batch application. Untill now I was able to unit test something like service methods and something like this (as done in every Spring Boot application).
Now I am trying to follow this tutorial in order to test an entire job from my unit test class (basically I want to execute a test method that perform a Job): https://www.baeldung.com/spring-batch-testing-job
This is my JUnit test class, in this case works fine and I correctly can test my services method using the @SpringBootTest annotation:
...ANSWER
Answered 2021-Sep-03 at 14:44The JobLauncherTestUtils that is provided by @SpringBatchTest expects that there is only a single bean of type Job in the test context. This is also documented in the java doc of the annotation.
If you use @SpringBootTest and full component scanning such that more than one job bean is picked up, @SpringBatchTest does not work out of the box.
The easiest solution is probably to remove @SpringBatchTest and to start the jobs with the jobLauncher. Alternatively, you can split your tests across multiple test classes and use test contexts that only contain a single job bean, respectively.
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Install notary
Ensure that you have docker and docker-compose installed.
git clone https://github.com/theupdateframework/notary.git and from the cloned repository path, start up a local Notary server and signer and copy the config file and testing certs to your local Notary config directory: $ docker-compose build $ docker-compose up -d $ mkdir -p ~/.notary && cp cmd/notary/config.json cmd/notary/root-ca.crt ~/.notary
Add 127.0.0.1 notary-server to your /etc/hosts, or if using docker-machine, add $(docker-machine ip) notary-server).
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