EIP-141: Designated invalid EVM instruction


  Ethereum Improvement Proposals
        
        
          
            
              
            
          
        

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      Standards Track: Core
    
  
  
    
      EIP-141: Designated invalid EVM instruction
    
    
      
        
      
    
    
      
        
      
    
  

  

  	Authors	Alex Beregszaszi (@axic)
	Created	2017-02-09


  


  

  
    Table of Contents

    	Abstract
	Motivation
	Specification
	Backwards Compatibility
	Copyright



  


  
      
      
         Abstract
      
      
    


An instruction is designated to remain as an invalid instruction.

  
    
      
      
         Motivation
      
      
    


The invalid instruction can be used as a distinct reason to abort execution.

  
    
      
      
         Specification
      
      
    


The opcode 0xfe is the INVALID instruction. It can be used to abort the execution (i.e. duplicates as an ABORT instruction).

  
    
      
      
         Backwards Compatibility
      
      
    


This instruction was never used and therefore has no effect on past contracts.

  
    
      
      
         Copyright
      
      
    


Copyright and related rights waived via CC0.


  Citation

  Please cite this document as:

  
  Alex Beregszaszi (@axic), "EIP-141: Designated invalid EVM instruction," Ethereum Improvement Proposals, no. 141, February 2017. [Online serial]. Available: https://eips.ethereum.org/EIPS/eip-141.






      
    
  

  

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