Node.js

ITIDA Canonicalize JSON and Compute SHA256 Hash

See more Egypt ITIDA Examples

Demonstrates creating the canonical (ITIDA) version of a JSON document, and then computes the SHA256 hash of the canonicalized JSON. Node.js

NODEJS_PRELUDE

function chilkatExample() {

    var success = false;

    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    // Load the JSON containing the document to be signed.

    // The JSON file should look like this:
    // NOTE: The JSON should NOT begin with "{ "documents" : [ ..."

    //       {
    //          "issuer":{
    //             "address":{
    //                "branchID":"0",
    //                "country":"EG",
    //                "regionCity":"Cairo",
    //                "postalCode":"",
    //                "buildingNumber":"0",
    //                "street":"123rd Street",
    //                "governate":"GOVERNATE"
    //             },
    //             "type":"B",
    //             "id":"209999899",
    //             "name":"Xyz SAE"
    //          },
    // ...
    // ...

    var sb = new chilkat.StringBuilder();
    success = sb.LoadFile("my_invoice.json","utf-8");
    if (success == false) {
        console.log("Failed to load input file.");
        return;
    }

    // Convert the contents of sb to the ITIDA canonical form.
    // Always pass utf-8 for the 2nd arg.
    sb.Encode("itida","utf-8");

    // Examine the canonicalized JSON
    console.log(sb.GetAsString());

    // Compute the SHA256 hash and show the SHA256 in hex format
    console.log("SHA256 hash: " + sb.GetHash("sha256","hex","utf-8"));

}

chilkatExample();