github.com/MetalBlockchain/subnet-evm@v0.4.9/core/vm/errors.go (about)

     1  // (c) 2019-2020, Ava Labs, Inc.
     2  //
     3  // This file is a derived work, based on the go-ethereum library whose original
     4  // notices appear below.
     5  //
     6  // It is distributed under a license compatible with the licensing terms of the
     7  // original code from which it is derived.
     8  //
     9  // Much love to the original authors for their work.
    10  // **********
    11  // Copyright 2014 The go-ethereum Authors
    12  // This file is part of the go-ethereum library.
    13  //
    14  // The go-ethereum library is free software: you can redistribute it and/or modify
    15  // it under the terms of the GNU Lesser General Public License as published by
    16  // the Free Software Foundation, either version 3 of the License, or
    17  // (at your option) any later version.
    18  //
    19  // The go-ethereum library is distributed in the hope that it will be useful,
    20  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    21  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    22  // GNU Lesser General Public License for more details.
    23  //
    24  // You should have received a copy of the GNU Lesser General Public License
    25  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    26  
    27  package vm
    28  
    29  import (
    30  	"errors"
    31  	"fmt"
    32  )
    33  
    34  // List evm execution errors
    35  var (
    36  	// errStopToken is an internal token indicating interpreter loop termination,
    37  	// never returned to outside callers.
    38  	errStopToken = errors.New("stop token")
    39  )
    40  
    41  // ErrStackUnderflow wraps an evm error when the items on the stack less
    42  // than the minimal requirement.
    43  type ErrStackUnderflow struct {
    44  	stackLen int
    45  	required int
    46  }
    47  
    48  func (e *ErrStackUnderflow) Error() string {
    49  	return fmt.Sprintf("stack underflow (%d <=> %d)", e.stackLen, e.required)
    50  }
    51  
    52  // ErrStackOverflow wraps an evm error when the items on the stack exceeds
    53  // the maximum allowance.
    54  type ErrStackOverflow struct {
    55  	stackLen int
    56  	limit    int
    57  }
    58  
    59  func (e *ErrStackOverflow) Error() string {
    60  	return fmt.Sprintf("stack limit reached %d (%d)", e.stackLen, e.limit)
    61  }
    62  
    63  // ErrInvalidOpCode wraps an evm error when an invalid opcode is encountered.
    64  type ErrInvalidOpCode struct {
    65  	opcode OpCode
    66  }
    67  
    68  func (e *ErrInvalidOpCode) Error() string { return fmt.Sprintf("invalid opcode: %s", e.opcode) }