signer.js

const signerData =  {
    currency : 'ETH',
    paymentAddress : PAYMENT_ADDRESS,
    expectedAmount : '10000000000000000000',
    data: { description: 'request-signer signed request' },
}

export async function signRequest() {
  // you need get the necessary information to sign
  // pass in your API_KEY to be able to sign requests
  const response = await axios.post(SIGNER_URL, requestData, {headers: { authorization: `${API_KEY}` }})
  return response.data;
}