package lockstep

import (
    "ripple/errmsgs"
	"ripple/types"
    "ripple/state"
)
type CommandHandler func(st *state.State, id types.UserIdentifier, args []byte) (func(), error)

func (l *Lockstep) dispatch(st *state.State, id types.UserIdentifier, instr types.Instruction) (func(), error) {
    cmd := instr.Command
    if cmd >= 128 {
        return nil, errmsgs.ErrInvalidCmd
    }
    h := l.cmdHandlers[cmd]
    if h == nil {
        return nil, errmsgs.ErrInvalidCmd
    }
    return h(st, id, instr.Arguments)
}