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

Low level triam smart cotnract support library

import {default as xdr} from "../generated/stellar-xdr_generated";
import isString from 'lodash/isString';

/**
 * This operation adds data entry to the ledger.
 * @function
 * @alias Operation.manageData
 * @param {object} opts
 * @param {string} opts.name - The name of the data entry.
 * @param {string|Buffer} opts.value - The value of the data entry.
 * @param {string} [opts.source] - The optional source account.
 * @returns {xdr.ManageDataOp}
 */
export const manageData = function(opts) {
  let attributes = {};

  if (!(isString(opts.name) && opts.name.length <= 64)) {
    throw new Error("name must be a string, up to 64 characters");
  }
  attributes.dataName = opts.name;

  if (!isString(opts.value) &&
      !Buffer.isBuffer(opts.value) && opts.value !== null) {
    throw new Error("value must be a string, Buffer or null");
  }

  if (isString(opts.value)) {
    attributes.dataValue = Buffer.from(opts.value);
  } else {
    attributes.dataValue = opts.value;
  }

  if (attributes.dataValue !== null && attributes.dataValue.length > 64) {
    throw new Error("value cannot be longer that 64 bytes");
  }

  let manageDataOp = new xdr.ManageDataOp(attributes);

  let opAttributes = {};
  opAttributes.body = xdr.OperationBody.manageDatum(manageDataOp);
  this.setSourceAccount(opAttributes, opts);

  return new xdr.Operation(opAttributes);
};