phone pe payment gateway sdk integration react native

What data will be send to make transaction in phone pe PG for example : body, checkSum, packageName, appSchema
how to make transaction…!

/**
    * This method is used to initiate PhonePe B2B PG Flow.
    * Provide all the information as requested by the method signature.
    * Params:
    * - body : The request body for the transaction as per the developer docs.
    * Make sure the request body is base64encoded
    * - checkSum: checksum for the particular transaction as per the developer docs.
    * - packageName: @Optional(for iOS) in case of android if intent url is expected for specific app.
    * - appSchema: Your custom URL Schemes, as per the developer docs.
    * Return: Will be returning a dictionary / hashMap
    * {
    * status: String, // string value to provide the status of the transaction
    * // possible values: SUCCESS, FAILURE, INTERRUPTED
    * error: String // if any error occurs
    * }
    */
startTransaction(
body: string,
checkSum: string,
packageName: string | null,
appSchema: string | null
):Promise;

Example:

PhonePePaymentSDK.startTransaction(body, checkSum, packageName, appSchema).then( a => { console.log(a) })

I am trying to make transaction using phone pe pg sdk but i don’t understand how to do this

startTransaction(
body: string,
checkSum: string,
packageName: string | null,
appSchema: string | null
):Promise;

Example:

PhonePePaymentSDK.startTransaction(body, checkSum, packageName, appSchema).then( a => { console.log(a) })

what data will be send in : body, checkSum, packageName, appSchema