Understand the Configuration

// beginning of the code
....
card: { \\name for cards
    name: "Pay Via Cards"
    instruments: [
      {
        method: "card",
        issuers: ["HDFC"],
        networks: ["Visa"],
        types: ["debit","credit"]
      }
    ]
},
...
//rest of the code

// beginning of the code
....
{
  "custom": {
    "name": "Pay with Apps",
    "instruments": [
      {
        "method": "app",
        "providers": [
          "cred"
        ]
      }
    ]
  }
}
...
//rest of the code

// Block creation
let myPayments = {
  name: "My Custom Block",
  instruments: ["gpay"]
};
// Usage in config
let config = {
  display: {
    blocks: {
      highlighted: myPayments
    }
  }
};

let sequence = ["block.highlighted", "upi", "netbanking"];

let cardInstrument = {
  method: "card"
};

let instrumentOfSomeBank = {
  method: "netbanking",
  banks: ["HDFC"]
};

let hiddenInstruments = [cardInstrument, instrumentOfSomeBank];

let cardInstrument = {
  method: "card"
};

let instrumentOfSomeBank = {
  method: "netbanking",
  banks: ["UTIB"]
};

let hiddenInstruments = [cardInstrument, instrumentOfSomeBank];