Method to set the default value for current timestamp

You can use useCurrent() method for your custom timestamp column to store the current timestamp as a default value.

1Schema::create('posts', function (Blueprint $table) {
2    $table->id();
3    $table->string('title');
4    $table->timestamp('added_at')->useCurrent();
5    $table->timespamps();
6});

Tip given by @iamgurmandeep