Method hash

lib/primitives/tx.js:178–198

* Hash the transaction with the non-witness serialization. * @param {String?} enc - Can be `'hex'` or `null`. * @returns {Hash|Buffer} hash

(enc)

   */

  hash(enc) {
    let h = this._hash;

    if (!h) {
      h = hash256.digest(this.toNormal());
      if (!this.mutable)
        this._hash = h;
    }

    if (enc === 'hex') {
      let hex = this._hhash;
      if (!hex) {
        hex = h.toString('hex');
        if (!this.mutable)
          this._hhash = hex;
      }
      h = hex;
    }

    return h;
  }

  /**
   * Hash the transaction with the witness