// Assumes validation has already been done.
func (fs *FactoidState) UpdateTransaction(rt bool, trans interfaces.ITransaction) error {
	for _, input := range trans.GetInputs() {
		adr := input.GetAddress().Fixed()
		oldv := fs.State.GetF(rt, adr)
		fs.State.PutF(rt, adr, oldv-int64(input.GetAmount()))
	}
	for _, output := range trans.GetOutputs() {
		adr := output.GetAddress().Fixed()
		oldv := fs.State.GetF(rt, adr)
		fs.State.PutF(rt, adr, oldv+int64(output.GetAmount()))
	}
	for _, ecOut := range trans.GetECOutputs() {
		ecbal := int64(ecOut.GetAmount()) / int64(fs.State.FactoshisPerEC)
		fs.State.PutE(rt, ecOut.GetAddress().Fixed(), fs.State.GetE(rt, ecOut.GetAddress().Fixed())+ecbal)
	}
	fs.State.NumTransactions++
	return nil
}