'decimal:2', 'payload' => 'array', 'paid_at' => 'datetime', ]; } public function application(): BelongsTo { return $this->belongsTo(InstallmentApplication::class, 'installment_application_id'); } public function schedule(): BelongsTo { return $this->belongsTo(InstallmentSchedule::class, 'installment_schedule_id'); } public function user(): BelongsTo { return $this->belongsTo(User::class); } }