How to fix a 400 error code issue in the Pricing API due to mismatched query parameters?

Overview:

Transak supports over 160 fiat currencies with 20+ local payment options. Each fiat currency has limitations depending on the country and the local payment option level.

For example:

1. The United States (USD) supports local payment options like Cash App.

2. India (INR) supports local payment options like UPI.

How to fetch the supported payment options from a Pricing API based on the Fiat currency?

Step 1: Access the endpoint https://api.transak.com/fiat/public/v1/currencies/fiat-currencies?apiKey=YOUR_API_KEY

Step 2: Look for the paymentOptions array in the response.

Step 3: Identify the local payment options supported for a fiat from the paymentOptions array.

"response": [
    {
      "symbol": "BRL",
      "supportingCountries": [
        "BR"
      ],
      "logoSymbol": "BR",
      "name": "Brazilian Real",
      "paymentOptions": [
        {
          //...
          "name": "Pix"
          //...
        },
        {
          //...
          "name": "AstroPay"
          //...
        },
        {
          //...
          "name": "Card Payment"
          //...
        },
        {
          //...
          "name": "Apple Pay"
          //...
        },
        {
          //...
          "name": "Google Pay"
          //...
        }
      ],
      "isPopular": true,
      "isAllowed": true,
      "roundOff": 3,
      "icon": "<svg xmlns=\\"<http://www.w3.org/2000/svg\\>" xmlns:xlink=\\"<http://www.w3.org/1999/xlink\\>" width=\\"21px\\" height=\\"15px\\" viewBox=\\"0 0 21 15\\" version=\\"1.1\\">\\n    <!-- Generator: sketchtool 46 (44423) - <http://www.bohemiancoding.com/sketch> -->\\n    <title>BR</title>\\n    <desc>Created with sketchtool.</desc>\\n    <defs>\\n        <linearGradient x1=\\"50%\\" y1=\\"0%\\" x2=\\"50%\\" y2=\\"100%\\" id=\\"linearGradient-1\\">\\n            <stop stop-color=\\"#FFFFFF\\" offset=\\"0%\\"/>\\n            <stop stop-color=\\"#F0F0F0\\" offset=\\"100%\\"/>\\n        </linearGradient>\\n        <linearGradient x1=\\"50%\\" y1=\\"0%\\" x2=\\"50%\\" y2=\\"100%\\" id=\\"linearGradient-2\\">\\n            <stop stop-color=\\"#05AB41\\" offset=\\"0%\\"/>\\n            <stop stop-color=\\"#019C39\\" offset=\\"100%\\"/>\\n        </linearGradient>\\n        <linearGradient x1=\\"50%\\" y1=\\"0%\\" x2=\\"50%\\" y2=\\"100%\\" id=\\"linearGradient-3\\">\\n            <stop stop-color=\\"#053087\\" offset=\\"0%\\"/>\\n            <stop stop-color=\\"#012877\\" offset=\\"100%\\"/>\\n        </linearGradient>\\n        <circle id=\\"path-4\\" cx=\\"3.5\\" cy=\\"3.5\\" r=\\"3.5\\"/>\\n    </defs>\\n    <g id=\\"Symbols\\" stroke=\\"none\\" stroke-width=\\"1\\" fill=\\"none\\" fill-rule=\\"evenodd\\">\\n        <g id=\\"BR\\">\\n            <rect id=\\"FlagBackground\\" fill=\\"url(#linearGradient-1)\\" x=\\"0\\" y=\\"0\\" width=\\"21\\" height=\\"15\\"/>\\n            <rect id=\\"Mask-Copy\\" fill=\\"url(#linearGradient-2)\\" x=\\"0\\" y=\\"0\\" width=\\"21\\" height=\\"15\\"/>\\n            <path d=\\"M2.42151632,7.77274586 C2.18871929,7.62211248 2.19350487,7.37479097 2.42151632,7.22725414 L10.0784837,2.27274586 C10.3112807,2.12211248 10.6935049,2.12520903 10.9215163,2.27274586 L18.5784837,7.22725414 C18.8112807,7.37788752 18.8064951,7.62520903 18.5784837,7.77274586 L10.9215163,12.7272541 C10.6887193,12.8778875 10.3064951,12.874791 10.0784837,12.7272541 L2.42151632,7.77274586 Z\\" id=\\"Combined-Shape\\" fill=\\"#FDD216\\"/>\\n            <g id=\\"Oval-2\\" transform=\\"translate(7.000000, 4.000000)\\">\\n                <mask id=\\"mask-5\\" fill=\\"white\\">\\n                    <use xlink:href=\\"#path-4\\"/>\\n                </mask>\\n                <use id=\\"Mask\\" fill=\\"url(#linearGradient-3)\\" xlink:href=\\"#path-4\\"/>\\n                <path d=\\"M-0.100381226,2.97376324 C0.164901149,2.75894182 1.36252192,2.933788 3.43417519,3.48641101 C4.90835176,3.87965437 6.60707006,4.747859 6.9957681,5.22786103 L7.31042832,5.61643399 L8.08757424,4.98711354 L7.77291401,4.59854058 C7.22285434,3.91927356 5.35175728,2.96296719 3.69191715,2.52019722 C1.10596471,1.83038255 -0.0661252244,1.65926374 -0.7297016,2.19661727 L-1.11827459,2.51127745 L-0.488954213,3.28842343 L-0.100381226,2.97376324 Z\\" id=\\"Line\\" fill=\\"#FFFFFF\\" fill-rule=\\"nonzero\\" mask=\\"url(#mask-5)\\"/>\\n            </g>\\n        </g>\\n    </g>\\n</svg>",
      "isPayOutAllowed": true
    }
  ]

FAQs:

1. Bad Request:

1. WHEN fiatCurrency=USD and paymentMethod=sepa_bank_transfer.

2. WHEN fiatCurrency=EUR and paymentMethod=gbp_bank_transfer

3. WHEN fiatCurrency=EUR and paymentMethod=pm_pix

2. Success Request:

1. WHEN fiatCurrency=EUR and paymentMethod=sepa_bank_transfer.

2. WHEN fiatCurrency=GBP and paymentMethod=gbp_bank_transfer

3. WHEN fiatCurrency=BRL and paymentMethod=pm_pix