Struct Journal

pub struct Journal {}

Journals are the primary way that application developers interact with the synchronic web.

Conceptually, a Journal is a service that interacts with users and other Journals (nodes) to persist synchronic web state. Behind the schemes, it is responsible for two capabilities:

• Persistence: managing bytes on the global hash graph

• Evaluation: executing code in the global Lisp environment

Records are the primary way that developers interface with Journals. A Record is a mapping between a constant identifier and mutable state. Both identifiers and state are represented as fixed-size Words that the outputs of a cryptographic hash function. When a new record is created, the Journal returns a record secret that is the second hash preimage of the identifier. This is intended to be used so that applications can bootstrap records into increasingly sophisticated notions of identity.

Implementations

impl Journal

pub fn evaluate(&self, query: &str) -> String

Evaluate a Lisp expression within a Record

Examples

use journal_sdk::JOURNAL;

// Simple expression
let output = JOURNAL.evaluate("(+ 1 2)");
assert!(output == "3");

// Complex expression
let output = JOURNAL.evaluate(
    "(begin (define (add2 x) (+ x 2)) (add2 1))",
);
assert!(output == "3");