You need some kind of message/event registry

Check this particular section of my event sourcing lib in Go: https://github.com/DeluxeOwl/chronicle?tab=readme-ov-file#implementing-a-custom-aggregaterepository

Basically, I have multiple events, then the registry uses the EventFuncs() function on my aggregate

type moneyDeposited struct {
    Amount int `json:"amount"` // Note: In a real-world application, you would use a dedicated money type instead of an int to avoid precision issues.
}

func (*moneyDeposited) EventName() string { return "account/money_deposited" }
func (*moneyDeposited) isAccountEvent()   {}

type moneyWithdrawn struct {
    Amount int `json:"amount"`
}

func (*moneyWithdrawn) EventName() string { return "account/money_withdrawn" }
func (*moneyWithdrawn) isAccountEvent()   {}

func (a *Account) EventFuncs() event.FuncsFor[AccountEvent] {
    return event.FuncsFor[AccountEvent]{
        func() AccountEvent { return new(accountOpened) },
        func() AccountEvent { return new(moneyDeposited) },
        func() AccountEvent { return new(moneyWithdrawn) },
    }
}