Interpreting "goal app read" response

gidon · February 28, 2021, 4:08pm

When I run the goal app read command I get back a list of state variables, each containing fields such as tt, ui and tb. Is there anywhere that lists what each of these mean?

fabrice · February 28, 2021, 4:26pm

if the variable is a []byte, then tt is set to 1, and tb contains the value
if the variable is an uint, then tt is set to 2, and ui contains the value

You indeed need to dig in the code to find this information:

github.com

algorand/go-algorand/blob/76177281c6ee2afe744be9bdbe882f0f72f54ef8/data/basics/teal.go#L242


	case TealBytesType:
		return "b"
	case TealUintType:
		return "u"
	}
	return "?"
}

// TealValue contains type information and a value, representing a value in a
// TEAL program
type TealValue struct {
	_struct struct{} `codec:",omitempty,omitemptyarray"`

	Type  TealType `codec:"tt"`
	Bytes string   `codec:"tb"`
	Uint  uint64   `codec:"ui"`
}

// ToValueDelta creates ValueDelta from TealValue
func (tv *TealValue) ToValueDelta() (vd ValueDelta) {
	if tv.Type == TealUintType {

and the TEAL type:

github.com

algorand/go-algorand/blob/76177281c6ee2afe744be9bdbe882f0f72f54ef8/data/basics/teal.go#L222


	min = AddSaturate(min, uintCost)
	min = AddSaturate(min, bytesCost)

	res.Raw = min
	return res
}

// TealType is an enum of the types in a TEAL program: Bytes and Uint
type TealType uint64

const (
	// TealBytesType represents the type of a byte slice in a TEAL program
	TealBytesType TealType = 1

	// TealUintType represents the type of a uint in a TEAL program
	TealUintType TealType = 2
)

func (tt TealType) String() string {
	switch tt {
	case TealBytesType: