Postgres + Sequelize: How to read function result? - json

Question

I have a function payment_summary() as below:
CREATE OR REPLACE FUNCTION payment_summary()
RETURNS SETOF PAYMENT_SUMMARY_TYPE
LANGUAGE plpgsql
AS $$
DECLARE
payment_sum payment_summary_type%ROWTYPE;
BEGIN
FOR payment_sum IN SELECT
pay.application_no,
project.title,
pay.payment_rec,
customer.cust_name,
project.estimated_cost,
(project.estimated_cost - pay.payment_rec) AS outstanding_amt
FROM project
INNER JOIN customer
ON project.customer_cust_id = customer.cust_id
INNER JOIN
(SELECT
project.application_no,
sum(payment.amount) AS payment_rec
FROM payment
INNER JOIN project
ON payment.project_id = project.project_id
WHERE payment.drcr_flg = 'Cr'
GROUP BY project.application_no) AS pay
ON pay.application_no = project.application_no
LOOP
RETURN NEXT payment_sum;
END LOOP;
END;
$$;
PAYMENT_SUMMARY_TYPE is defined as:
CREATE TYPE PAYMENT_SUMMARY_TYPE AS
(
application_no VARCHAR(150),
title VARCHAR(500),
payment_rec INTEGER,
customer_name VARCHAR(500),
estimated_cost INTEGER,
outstanding_amt INTEGER
);
Using below code to execute the function and get results:
sequelize.query('SELECT payment_summary()').then(function(data) {
res.json(data);
});
Getting below as response:
[
[
{
"payment_summary": "(716,\"C1\",100000,\"C1 - city\",0,-100000)"
},
{
"payment_summary": "(716,\"C2\",100000,\"C2 - city\",0,-100000)"
}
],
{
"command": "SELECT",
"rowCount": 2,
"oid": null,
"rows": [
{
"payment_summary": "(716,\"C1\",100000,\"C1 - city\",0,-100000)"
},
{
"payment_summary": "(716,\"C2\",100000,\"C2 - city\",0,-100000)"
}
],
"fields": [
{
"name": "payment_summary",
"tableID": 0,
"columnID": 0,
"dataTypeID": 17453,
"dataTypeSize": -1,
"dataTypeModifier": -1,
"format": "text"
}
],
"_parsers": [
null
],
"rowAsArray": false
}
]
I need the response in below format:
[
{
application_no: 716,
title: "C1",
payment_rec : 100000,
customer_name : "C1 - city"
estimated_cost : 0
outstanding_amt : -100000
},
{
application_no: 717,
title: "C2",
payment_rec : 100000,
customer_name : "C2 - city"
estimated_cost : 0
outstanding_amt : -100000
}
]
How can i read / convert the response in required format ?