Automation Help needed - "Received invalid in...

[Faculty_Schedul]

I am new to scripting in Airtable and am receiving "Received malformed JSON input." every time I try to validate my JSON. Below is my script, and the error message Airtable keeps returning- can someone help me determine what is wrong with my formatting? For context, I am trying to use a web hook to connect Salesforce and Airtable, where Salesforce creates a record in my Airtable base.

// @TS-nocheck

var Base64 = {

// private property

_keyStr: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",

// public method for decoding

decode: function (input) {

var output = "";

var chr1, chr2, chr3;

var enc1, enc2, enc3, enc4;

var i = 0;

input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");

while (i < input.length) {

enc1 = this._keyStr.indexOf(input.charAt(i++));

enc2 = this._keyStr.indexOf(input.charAt(i++));

enc3 = this._keyStr.indexOf(input.charAt(i++));

enc4 = this._keyStr.indexOf(input.charAt(i++));

chr1 = (enc1 << 2) | (enc2 >> 4);

chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);

chr3 = ((enc3 & 3) << 6) | enc4;

output = output + String.fromCharCode(chr1);

if (enc3 != 64) {

output = output + String.fromCharCode(chr2);

}

if (enc4 != 64) {

output = output + String.fromCharCode(chr3);

}

}

output = Base64._utf8_decode(output);

return output;

},

// private method for UTF-8 decoding

_utf8_decode: function (utftext) {

var string = "";

var i = 0;

var c = 0;

var c2 = 0;

var c3 = 0;

while (i < utftext.length) {

c = utftext.charCodeAt(i);

if (c < 128) {

string += String.fromCharCode(c);

i++;

}

else if ((c > 191) && (c < 224)) {

c2 = utftext.charCodeAt(i + 1);

string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));

i += 2;

}

else {

c2 = utftext.charCodeAt(i + 1);

c3 = utftext.charCodeAt(i + 2);

string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));

i += 3;

}

}

return string;

}

}

let sfFields = JSON.parse(Base64.decode(input.config().update));

console.log(sfFields);

const NUM_OF_PASSIVE_PARTICIPANTS = "fldIo8ZOWFEvX7joL"

const ACCOUNT_ID = 'fldNP4o5Fm5BAcOu1';

const AGENDA_PROPOSAL_LINK = 'fldNsfagu9jlBHXnN';

const ASSESSMENTS = 'fld2cgwKP06grankN';

const AUDIENCE_LEVEL = 'fldikAOITHFyDNxHL';

const CLIENT_RELATIONS_DIRECTORS = 'fldQdxidRivMyws8k';

const fldConnection = {

[NUM_OF_PASSIVE_PARTICIPANTS]: 'Num_Passive_Participants_Observers__c', //# of Passive Participants/Observers

[ACCOUNT_ID]: 'AccountId', //AccountId

[AGENDA_PROPOSAL_LINK]: 'Agenda_Proposal_Link__c', //Agenda/Proposal Link

[ASSESSMENTS]: 'Assessments__c', //Assessments

[AUDIENCE_LEVEL]: 'Audience_Level__c', //Audience Level

[CLIENT_RELATIONS_DIRECTORS]: 'Client_Relations_Directors__c', //Client Relations Directors

var fldType = {

[NUM_OF_PASSIVE_PARTICIPANTS]: 'number',

[ACCOUNT_ID]: 'text',

[AGENDA_PROPOSAL_LINK]: 'text',

[ASSESSMENTS]: 'multiSel',

[AUDIENCE_LEVEL]: 'multiSel',

[CLIENT_RELATIONS_DIRECTORS]: 'multiSel',

};

let progRecFields = {};

for (const fld in fldConnection) {

let val = sfFields[fldConnection[fld]]

if (val !== undefined) {

switch(fldType[fld]){

case "singleSel":

progRecFields[fld] = formatSingleSel(val);

break;

case "multiSel":

progRecFields[fld] = formatMultiSel(val);

break;

case "date":

progRecFields[fld] = formatDate(val);

break;

case "number":

progRecFields[fld] = formatNumber(val);

break;

case "percent":

progRecFields[fld] = formatPercent(val);

break;

case "text":

progRecFields[fld] = val;

break;

default:

error("Unknown Field Type");

}

}

}

let tblPrograms = base.getTable("tbl6bgXM1l9yfZgtJ"); //Programs

let progRecExists = false;

let curRecId = sfFields[fldConnection[SALESFORCE_ID]];

let atProgram = await tblPrograms.selectRecordsAsync({ fields: [SALESFORCE_ID] });

let atRecId;

atProgram.records.forEach(rec => {

if (rec.getCellValueAsString(SALESFORCE_ID) === curRecId) {

progRecExists = true;

atRecId = rec.id;

return;

}

})

if (!progRecExists) {

createProgram();

} else {

updateProgram();

}

async function createProgram() {

await tblPrograms.createRecordAsync(progRecFields);

}

async function updateProgram() {

await tblPrograms.updateRecordAsync(atRecId, progRecFields);

}

function formatSingleSel(val) {

return { name: val };

}

function formatMultiSel(val) {

let valArr = val.split(";");

valArr.forEach( (ele, index) => {

valArr[index] = { name: ele };

})

return valArr;

}

function formatDate(val){

return new Date(val);

}

function formatNumber(val){

return parseInt(val);

}

function formatPercent(val){

return parseInt(val)/100;

}