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If the code is PAYMENT_INITIATED, need to check status of the transaction using transaction status API.

{  
   "merchantId":"TESTMERCHANT",
   "transactionId":"TX1234",
   "merchantOrderId":"ORDERID",
   "merchantUserId":"TXX",
   "mobileNumber":"9123456789",
   "amount":100, //total amount
   "paymentSources":[  
      {  
         "mode":"wallets",
         "providers":[  //taking list here for multiple wallet providers
            "PHONEPE" 
         ]
      }
   ]
}

{  
 "request": "<Base64Encode>"
}

Request Headers

Header Name	Header Value
`Content-Type`	application/json
`X-VERIFY`	SHA256(base64 encoded payload + "/v3/merchant/inline/pay" + salt key) + ### + salt index

Request Parameters

Parameter Name	Type	Description	Mandatory
`merchantId`	`STRING`	Unique `MerchantID` assigned to the merchant by PhonePe	`Yes`
`transactionId`	`STRING`	Unique merchant transaction id (merchants do a status check etc using this id).	`Yes`
`merchantUserId/ userAuthToken`	`STRING`	User Id to identify user / token generated while linking user	`Yes`
`amount`	`LONG`	Transaction amount in Paise	`Yes`
`merchantOrderId`	`STRING`	Merchant order id	`No`
`paymentSources`	`ARRAY`	List of payment sources (explained below)	`Yes`
`mobileNumber`	`STRING`	Customers' mobile number	`Yes`

Response Codes

CODE	Despcription
`PAYMENT_INITIATED`	Success scenario - will contain redirect url
`AUTHORIZATION_FAILED`	Value of X-VERIFY is incorrect
`BAD_REQUEST`	Some mandatory parameter is missing
`INTERNAL_SERVER_ERROR`	Something went wrong
`INVALID_TRANSACTION_ID`	If the transaction id is not unique
`INVALID_TRANSACTION_ID`	Duplicate TransactionID
`INVALID_USER_AUTH_TOKEN`	The userAuthToken provided is either invalid or not mapped to merchant.
`USER_BLACKLISTED`	Customer is blacklisted on PhonePe side
`MERCHANT_USER_NOT_FOUND`	No user exists for merchant id and user id combination.
`USER_BLOCKED`	User is blocked for 1 day.

Transaction status check API:

After user is redirected to merchant page after completing the transaction, you can get the
status of transaction using transaction status api. Please use this link for reference.