function operationReceipt(outcome,receipt){
 const original=typeof receipt==='string'?JSON.parse(receipt):receipt;
 if(!original||!outcome?.source||!['locationId','workflowId','recordId','revision','phone','country','profile'].every(k=>outcome.source[k]===original[k])||!/^\+[1-9][0-9]{6,14}$/.test(outcome.source.e164||'')||!/^[a-f0-9]{8}-[a-f0-9]{4}-[1-8][a-f0-9]{3}-[89ab][a-f0-9]{3}-[a-f0-9]{12}$/i.test(outcome.operationId||''))throw Error('Retain the original request and response for review; no replacement purchase.');
 return {operationId:outcome.operationId,receipt:JSON.stringify({...original,e164:outcome.source.e164,operationId:outcome.operationId})};
}
function retainDecision(outcome,receipt){
 if(outcome?.state==='preview'&&outcome.operationId===null&&outcome.readyToWrite===false)return {retain:false,reason:'preview_only',operationId:'',receipt:''};
 const bound=operationReceipt(outcome,receipt);
 return {retain:true,reason:null,...bound};
}
function nativeObject(value,name){
 let parsed=value;
 if(typeof value==='string'){
  try{parsed=JSON.parse(value);}catch(error){
   // Native workflow interpolation HTML-encodes the JSON string. Decode
   // exactly one layer only when the opening JSON key is visibly encoded.
   if(!/^\s*\{(?:"|"|")/i.test(value))throw error;
   const entities={'quot':'"','amp':'&','apos':"'",'lt':'<','gt':'>'};
   const decoded=value.replace(/&(#x[0-9a-f]+|#[0-9]+|quot|amp|apos|lt|gt);/gi,(entity,key)=>{
    if(key[0]!=='#')return entities[key.toLowerCase()]??entity;
    const point=key[1].toLowerCase()==='x'?parseInt(key.slice(2),16):parseInt(key.slice(1),10);
    return point>0&&point<=0x10ffff?String.fromCodePoint(point):entity;
   });
   parsed=JSON.parse(decoded);
  }
 }
 if(!parsed||typeof parsed!=='object'||Array.isArray(parsed))throw Error(name+' must be a JSON object.');
 return parsed;
}
return retainDecision(nativeObject(inputData.outcome,'outcome'), nativeObject(inputData.receipt,'receipt'));