How to use the ecdsa-sig-formatter.derToJose function in ecdsa-sig-formatter

// make sure the required parameters are provided
    if (!(signingInputHash && rawPrivateKey)) {
      throw new MissingParametersError(
        'a signing input hash and private key are all required')
    }
    // prepare the private key
    const privateKeyObject = SECP256K1Client.loadPrivateKey(rawPrivateKey)
    // calculate the signature
    const signatureObject = privateKeyObject.sign(signingInputHash)
    const derSignature = Buffer.from(signatureObject.toDER())

    if (format === 'der') {
      return derSignature.toString('hex')
    } else if (format === 'jose') {
      // return the JOSE-formatted signature
      return derToJose(derSignature, 'ES256')
    } else {
      throw Error('Invalid signature format')
    }
  }

var signature;
  var cryptoAlgName = enums.algCryptoMap[algorithm];
  var signingType = enums.algTypeMap[algorithm];

  if (!cryptoAlgName) {
    throw new errors.UnsupportedSigningAlgorithmJwtError();
  }

  if (signingType === 'hmac') {
    buffer = crypto.createHmac(cryptoAlgName, cryptoInput).update(payload).digest();
  } else {
    buffer = crypto.createSign(cryptoAlgName).update(payload).sign(cryptoInput);
  }

  if (helpers.isECDSA(algorithm)) {
    signature = ecdsaSigFormatter.derToJose(buffer, algorithm);
  } else {
    signature = helpers.base64urlEncode(buffer);
  }

  return signature;
};

return function sign() {
    var signature = inner.apply(null, arguments);
    signature = formatEcdsa.derToJose(signature, 'ES' + bits);
    return signature;
  };
}

return function sign() {
    var signature = inner.apply(null, arguments);
    signature = formatEcdsa.derToJose(signature, 'ES' + bits);
    return signature;
  };
}