test-triam-base-contract/src/operations/change_asset.js

Low level triam smart cotnract support library

import {default as xdr} from "../generated/stellar-xdr_generated";
import {Keypair} from "../keypair";

import {StrKey} from "../strkey";
import isString from 'lodash/isString';

/**
 * Create a ChangeAsset operation.
 * @function
 * @alias Operation.changeAsset
 * @param {object} opts
 * @param {Asset} opts.asset - The asset to create.
 * @param {string} opts.beneficiary - The beneficiary account ID.
 * The source account for the payment. Defaults to the transaction's source account.
 * @param {string} [opts.source]
 * @returns {xdr.ChangeAssetOp}
 */
export const changeAsset = function(opts) {

  if (!opts.asset) {
    throw new Error("Must provide an asset for a changeAsset operation");
  }

  let attributes = {};
  attributes.asset = opts.asset.toXDRObject();

  if (isString(opts.beneficiary)) {
    if ( opts.beneficiary.length != 0 && opts.beneficiary.length != 56) {
      throw new Error(" invalid beneficiary's address's length");
    }
    if ( opts.beneficiary.length == 56 && !StrKey.isValidEd25519PublicKey(opts.beneficiary)) {
      throw new Error("invalid beneficiary's address's format");
    }
  } else {
    throw new Error("beneficiary is invalid");
  }

  attributes.beneficiary = opts.beneficiary;

  let changeAsset = new xdr.ChangeAssetOp(attributes);
  let opAttributes = {};
  opAttributes.body = xdr.OperationBody.changeAsset(changeAsset);
  this.setSourceAccount(opAttributes, opts);
  return new xdr.Operation(opAttributes);
};