@kinecosystem/kin-base/lib/operations/change_trust.js

Low level Kin support library

"use strict";

var _interopRequire = function (obj) { return obj && obj.__esModule ? obj["default"] : obj; };

Object.defineProperty(exports, "__esModule", {
  value: true
});

var xdr = _interopRequire(require("../generated/stellar-xdr_generated"));

var Keypair = require("../keypair").Keypair;

var isUndefined = _interopRequire(require("lodash/isUndefined"));

var Hyper = require("js-xdr").Hyper;

var BigNumber = _interopRequire(require("bignumber.js"));

var MAX_INT64 = "9223372036854775807";

/**
 * Returns an XDR ChangeTrustOp. A "change trust" operation adds, removes, or updates a
 * trust line for a given asset from the source account to another. The issuer being
 * trusted and the asset code are in the given Asset object.
 * @function
 * @alias Operation.changeTrust
 * @param {object} opts
 * @param {Asset} opts.asset - The asset for the trust line.
 * @param {string} [opts.limit] - The limit for the asset, defaults to max int64.
 *                                If the limit is set to "0" it deletes the trustline.
 * @param {string} [opts.source] - The source account (defaults to transaction source).
 * @returns {xdr.ChangeTrustOp}
 */
var changeTrust = function changeTrust(opts) {
  var attributes = {};
  attributes.line = opts.asset.toXDRObject();
  if (!isUndefined(opts.limit) && !this.isValidAmount(opts.limit, true)) {
    throw new TypeError(this.constructAmountRequirementsError("limit"));
  }

  if (opts.limit) {
    attributes.limit = this._toXDRAmount(opts.limit);
  } else {
    attributes.limit = Hyper.fromString(new BigNumber(MAX_INT64).toString());
  }

  if (opts.source) {
    attributes.source = opts.source.masterKeypair;
  }
  var changeTrustOP = new xdr.ChangeTrustOp(attributes);

  var opAttributes = {};
  opAttributes.body = xdr.OperationBody.changeTrust(changeTrustOP);
  this.setSourceAccount(opAttributes, opts);

  return new xdr.Operation(opAttributes);
};
exports.changeTrust = changeTrust;