net.corda.core.contracts

Interface Attachment

All Superinterfaces:

NamedByHash

public Attachment
extends NamedByHash

An attachment is a ZIP (or an optionally signed JAR) that contains one or more files. Attachments are meant to contain public static data which can be referenced from transactions and utilised from contracts. Good examples of how attachments are meant to be used include:

• Calendar data

• Fixes (e.g. LIBOR)

• Smart contract code

• Legal documents

• Facts generated by oracles which might be reused a lot

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	Attachment.DefaultImpls An attachment is a ZIP (or an optionally signed JAR) that contains one or more files. Attachments are meant to contain public static data which can be referenced from transactions and utilised from contracts. Good examples of how attachments are meant to be used include:

Method Summary

Modifier and Type	Method and Description
void	extractFile(java.lang.String path, java.io.OutputStream outputTo) Finds the named file case insensitively and copies it to the output stream.
java.io.InputStream	open()
java.util.jar.JarInputStream	openAsJAR()

Methods inherited from interface net.corda.core.contracts.NamedByHash

getId

Method Detail

open

java.io.InputStream open()

openAsJAR

java.util.jar.JarInputStream openAsJAR()

extractFile

void extractFile(java.lang.String path,
                 java.io.OutputStream outputTo)

Finds the named file case insensitively and copies it to the output stream.

Throws:

- if the given path doesn't exist in the attachment.