curl --request POST \
  --url https://partners.chargeexpressltd.com/api/public/v1/invoices/usage/pay \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'Idempotency-Key: <idempotency-key>' \
  --data '
{
  "invoice_ids": [
    "<string>"
  ],
  "amount": 123
}
'

const options = {
  method: 'POST',
  headers: {
    'Idempotency-Key': '<idempotency-key>',
    Authorization: 'Bearer <token>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({invoice_ids: ['<string>'], amount: 123})
};

fetch('https://partners.chargeexpressltd.com/api/public/v1/invoices/usage/pay', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://partners.chargeexpressltd.com/api/public/v1/invoices/usage/pay"

payload = {
    "invoice_ids": ["<string>"],
    "amount": 123
}
headers = {
    "Idempotency-Key": "<idempotency-key>",
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

{
  "object": "funding",
  "id": "<string>",
  "status": "pending",
  "amount": "125.50",
  "currency": "GHS",
  "unit_price": "125.50",
  "kwh": "12.5000",
  "credited_kwh": "12.5000",
  "debt_repaid": "125.50",
  "invoice_number": "<string>",
  "checkout_url": "<string>",
  "credited_at": "2023-11-07T05:31:56Z",
  "created_at": "2023-11-07T05:31:56Z",
  "updated_at": "2023-11-07T05:31:56Z",
  "sandbox": true
}

{
  "error": {
    "type": "authentication_error",
    "code": "<string>",
    "message": "<string>",
    "request_id": "<string>",
    "param": "<string>"
  }
}

{
  "error": {
    "type": "authentication_error",
    "code": "<string>",
    "message": "<string>",
    "request_id": "<string>",
    "param": "<string>"
  }
}

{
  "error": {
    "type": "authentication_error",
    "code": "<string>",
    "message": "<string>",
    "request_id": "<string>",
    "param": "<string>"
  }
}

{
  "error": {
    "type": "authentication_error",
    "code": "<string>",
    "message": "<string>",
    "request_id": "<string>",
    "param": "<string>"
  }
}

{
  "error": {
    "type": "authentication_error",
    "code": "<string>",
    "message": "<string>",
    "request_id": "<string>",
    "param": "<string>"
  }
}

{
  "error": {
    "type": "authentication_error",
    "code": "<string>",
    "message": "<string>",
    "request_id": "<string>",
    "param": "<string>"
  }
}