EIP-609: Hardfork Meta: Byzantium


  Ethereum Improvement Proposals
        
        
          
            
              
            
          
        

        AllCoreNetworkingInterfaceERCMetaInformational

      



      
        
  
    

  
    
    
    
    
    
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      EIP-609: Hardfork Meta: Byzantium
    
    
      
        
      
    
    
      
        
      
    
  

  

  	Authors	Alex Beregszaszi (@axic)
	Created	2017-04-23
	Requires	

  EIP-100, 

  EIP-140, 

  EIP-196, 

  EIP-197, 

  EIP-198, 

  EIP-211, 

  EIP-214, 

  EIP-607, 

  EIP-649, 

  EIP-658




  


  

  
    Table of Contents

    	Abstract
	Specification
	References
	Copyright



  


  
      
      
         Abstract
      
      
    


This specifies the changes included in the hard fork named Byzantium.

  
    
      
      
         Specification
      
      
    


	Codename: Byzantium
	Aliases: Metropolis/Byzantium, Metropolis part 1
	Activation:
    	Block >= 4,370,000 on Mainnet
	Block >= 1,700,000 on Ropsten testnet


  
	Included EIPs:
    	EIP-100 (Change difficulty adjustment to target mean block time including uncles)
	EIP-140 (REVERT instruction in the Ethereum Virtual Machine)
	EIP-196 (Precompiled contracts for addition and scalar multiplication on the elliptic curve alt_bn128)
	EIP-197 (Precompiled contracts for optimal ate pairing check on the elliptic curve alt_bn128)
	EIP-198 (Precompiled contract for bigint modular exponentiation)
	EIP-211 (New opcodes: RETURNDATASIZE and RETURNDATACOPY)
	EIP-214 (New opcode STATICCALL)
	EIP-649 (Difficulty Bomb Delay and Block Reward Reduction)
	EIP-658 (Embedding transaction status code in receipts)


  


  
    
      
      
         References
      
      
    


	https://blog.ethereum.org/2017/10/12/byzantium-hf-announcement/


  
    
      
      
         Copyright
      
      
    


Copyright and related rights waived via CC0.


  Citation

  Please cite this document as:

  
  Alex Beregszaszi (@axic), "EIP-609: Hardfork Meta: Byzantium," Ethereum Improvement Proposals, no. 609, April 2017. [Online serial]. Available: https://eips.ethereum.org/EIPS/eip-609.






      
    
  

  

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        Ethereum Improvement Proposals (EIPs) describe standards for the Ethereum platform, including core protocol specifications, client APIs, and contract standards.