Nebulearn

Rectangle Smart Contract

class Rectangle {
  constructor() {
      // define fields stored to state trie.
      LocalContractStorage.defineProperties(this, {
          height: null,
          width: null,
      });
  }

  // init function.
  init(height, width) {
      this.height = height;
      this.width = width;
  }

  // calc area function.
  calcArea() {
      return this.height * this.width;
  }

  // verify function.
  verify(expected) {
      let area = this.calcArea();
      if (expected != area) {
          throw new Error("Error: expected " + expected + ", actual is " + area + ".");
      }
  }
}

module.exports = Rectangle