@metamask/ocap-kernel/dist/store/utils/parse-ref.cjs

OCap kernel core components

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.parseRef = parseRef;
const errors_1 = require("@endo/errors");
/**
 * Parse an alleged ref string into its components.
 *
 * @param ref - The string to be parsed.
 *
 * @returns an object with all of the ref string components as individual properties.
 */
function parseRef(ref) {
    let context;
    let typeIdx = 1;
    switch (ref[0]) {
        case 'k':
            context = 'kernel';
            break;
        case 'o':
        case 'p':
            typeIdx = 0;
            context = 'vat';
            break;
        case 'r':
            context = 'remote';
            break;
        case undefined:
        default:
            (0, errors_1.Fail) `invalid reference context ${ref[0]}`;
    }
    if (ref[typeIdx] !== 'p' && ref[typeIdx] !== 'o') {
        (0, errors_1.Fail) `invalid reference type ${ref[typeIdx]}`;
    }
    const isPromise = ref[typeIdx] === 'p';
    let direction;
    let index;
    if (context === 'kernel') {
        index = ref.slice(2);
    }
    else {
        const dirIdx = typeIdx + 1;
        if (ref[dirIdx] !== '+' && ref[dirIdx] !== '-') {
            (0, errors_1.Fail) `invalid reference direction ${ref[dirIdx]}`;
        }
        direction = ref[dirIdx] === '+' ? 'export' : 'import';
        index = ref.slice(dirIdx + 1);
    }
    return {
        context,
        direction,
        isPromise,
        index,
    };
}
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