Generate Signature

const crypto = require("crypto");
const SIGNATURE_KEY = "JUYADZ3ZMrj8Bwdme2Pu8a4r"; // your signature key
 
// Your request body
const data = {
  svAccServiceRQ: {
    company: [
      {
        companyCode: "1810",
        userName: "Muhammad_11",
        account: [
          {
            bankCode: "11",
            accountNum: "108057386290014",
            corpId: "OSV0000062",
            holderName: "Company Code 1810",
            iban: "SA5330400108057386290014",
            address: "riyadh",
            currency: "SAR",
            acERPcode: "ANB_1"
          }
        ]
      }
    ]
  }
};
 
function generateSignature(reqBody) {
  // Step 1: Convert request body to JSON string
  const jsonString = JSON.stringify(reqBody);
 
  // Step 2: Base64 encode the JSON string
  const base64Data = Buffer.from(jsonString, "utf-8").toString("base64");
 
  // Step 3: Append the SIGNATURE_KEY
  const dataToHash = base64Data + SIGNATURE_KEY;
 
  // Step 4: Generate SHA256 hash (hex encoded)
  const signature = crypto.createHash("sha256").update(dataToHash).digest("hex");
 
  return signature;
}
 
// Example usage
const signature = generateSignature(data);
console.log("Generated Signature:", signature);