path: root/vm/errors.go

package vm

import (
    "fmt"
    "math/big"
)

type OutOfGasError struct {
    req, has *big.Int
}

func OOG(req, has *big.Int) OutOfGasError {
    return OutOfGasError{req, has}
}

func (self OutOfGasError) Error() string {
    return fmt.Sprintf("out of gas! require %v, have %v", self.req, self.has)
}

func IsOOGErr(err error) bool {
    _, ok := err.(OutOfGasError)
    return ok
}

type StackError struct {
    req, has int
}

func StackErr(req, has int) StackError {
    return StackError{req, has}
}

func (self StackError) Error() string {
    return fmt.Sprintf("stack error! require %v, have %v", self.req, self.has)
}

func IsStack(err error) bool {
    _, ok := err.(StackError)
    return ok
}

type DepthError struct{}

func (self DepthError) Error() string {
    return fmt.Sprintf("Max call depth exceeded (%d)", MaxCallDepth)
}

func IsDepthErr(err error) bool {
    _, ok := err.(DepthError)
    return ok
}