function somePromise(someObject) {

console.log("Start work with promise..");

let promise = new Promise(function(resolve, reject) {

setTimeout(function() {

let random = Math.random();

if (random > 0.3) {

someObject.prop2 = 11;

resolve(someObject);

}

reject("Some error.");

}, 1000);

});

return promise;

}

function firstFunc(someObject) {

console.log("First function.");

console.log(someObject);

someObject.prop3 = "This is first func prop.";

return new Promise((resolve, reject) => {

resolve(someObject)

});

}

function secondFunc(someObject) {

console.log("Second function.");

console.log(someObject);

return Promise.resolve({ propNew: 111 })

}

function thirdFunc(someObject) {

console.log("Third function.");

console.log(someObject);

return new Promise((resolve, reject) => {

reject("Third func error.");

});

}

function finallyFunc() {

console.log("End work with promise.")

}

const testObject = {

prop1: "Property one",

prop2: 1

}

somePromise(testObject)

.then(firstFunc)

.then(secondFunc)

.then(thirdFunc)

.catch(error => console.error(error))

.finally(finallyFunc);