navio-blsct/dist/managedObj.js

TypeScript bindings for the `libblsct` library used by the [Navio](https://nav.io/) blockchain to construct confidential transactions based on the BLS12-381 curve.

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.ManagedObj = void 0;
const blsct_1 = require("./blsct");
const util_1 = __importDefault(require("util"));
const finalizer = new FinalizationRegistry((fi) => {
    if (fi.obj && !fi.isBorrow) {
        (0, blsct_1.freeObj)(fi.obj);
        fi.obj = undefined;
    }
});
class ManagedObj {
    obj;
    objSize;
    fi;
    constructor(obj) {
        this.fi = {
            obj,
            cls: this.constructor.name,
            isBorrow: false,
        };
        if (obj !== undefined) {
            finalizer.register(this, this.fi, this);
        }
        this.obj = obj;
        this.objSize = 0;
    }
    size() {
        return this.objSize;
    }
    move() {
        if (this.obj === undefined) {
            throw new Error('Obj has already been moved');
        }
        const obj = this.obj;
        this.obj = undefined;
        // both fi.obj and unregister can suppress freeing memory
        // using both just in case either of them fails
        this.fi.obj = undefined;
        finalizer.unregister(this);
        return obj;
    }
    static fromObj(obj) {
        return new this(obj);
    }
    static fromObjAndSize(obj, objSize) {
        const x = new this(obj);
        x.objSize = objSize;
        return x;
    }
    toString() {
        return `${this.constructor.name}(${this.serialize()})`;
    }
    [util_1.default.inspect.custom]() {
        return this.toString();
    }
    serialize() {
        return 'NOT IMPLEMENTED';
    }
    static _deserialize(hex, deserializer) {
        if (hex.length % 2 !== 0) {
            hex = `0${hex}`;
        }
        const rv = deserializer(hex);
        if (rv.result !== 0) {
            (0, blsct_1.freeObj)(rv);
            throw new Error(`Deserialization failed. Error code = ${rv.result}`);
        }
        const x = new this(rv.value);
        x.objSize = rv.value_size;
        (0, blsct_1.freeObj)(rv);
        return x;
    }
}
exports.ManagedObj = ManagedObj;