publish

action foo() {
    // assume there is a `command Foo { ... }`
    let obj = Foo{a: 3, b: "hello"}
    publish obj
}

publish submits a Command struct to the Aranya runtime. It is how Commands are created in the system. The struct given to publish is then passed to the command’s seal block as this, so the command can be transformed into a serialized format. Then the sealed command is evaluated within the runtime. Any failure in this evaluation will cause the action to fail and no commands will be added to the graph, including commands published before it.

publish is not a terminating statement; multiple commands can be published in a single action.