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Allow Hash Constraints to propagate to Signature Constraints. When propagating, the new jar is added to the transaction instead of the original contract attachment (jar). The following requirements must be met to do so: - System property "net.corda.node.disableHashConstraints" must be set to `true` - The min platform version must be 4 or greater - There must be an input state with a hash constraint - There must be no output states with a hash constraint - The new jar must be signed If these requirements are not met, the original Hash Constraint will be kept and the contract attachment related to it is also used. This transition is done at the start of `handleContract` as it is not the normal path a transition would follow. It is considered a backdoor and should be treated separately from the rest of the attachment and constraint logic. Furthermore, it will only work in private network since all nodes must set the special `disableHashConstraints` flag.
Corda
Corda is an open source blockchain project, designed for business from the start. Only Corda allows you to build interoperable blockchain networks that transact in strict privacy. Corda's smart contract technology allows businesses to transact directly, with value.
Features
- Smart contracts that can be written in Java and other JVM languages
- Flow framework to manage communication and negotiation between participants
- Peer-to-peer network of nodes
- "Notary" infrastructure to validate uniqueness and sequencing of transactions without global broadcast
- Enables the development and deployment of distributed apps called CorDapps
- Written in Kotlin, targeting the JVM
Getting started
- Read the Getting Started documentation
- Run the Example CorDapp
- Read about Corda's Key Concepts
- Follow the Hello, World! tutorial
Useful links
- Project Website
- Mailing List
- Documentation
- Stack Overflow Tag
- Slack Channel
- Meetups
- Training Courses
Contributing
Corda is an open-source project and contributions are welcome!
To find out how to contribute, please see our contributing docs.
License
Acknowledgements
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