EIP-779: Hardfork Meta: DAO Fork


  Ethereum Improvement Proposals
        
        
          
            
              
            
          
        

        AllCoreNetworkingInterfaceERCMetaInformational

      



      
        
  
    

  
    
    
    
    
    
      Meta
    
  
  
    
      EIP-779: Hardfork Meta: DAO Fork
    
    
      
        
      
    
    
      
        
      
    
  

  

  	Authors	Casey Detrio (@cdetrio)
	Created	2017-11-26
	Requires	

  EIP-606




  


  

  
    Table of Contents

    	Abstract
	Specification
	References
	Copyright



  


  
      
      
         Abstract
      
      
    


This documents the changes included in the hard fork named “DAO Fork”. Unlike other hard forks, the DAO Fork did not change the protocol; all EVM opcodes, transaction format, block structure, and so on remained the same. Rather, the DAO Fork was an “irregular state change” that transferred ether balances from a list of accounts (“child DAO” contracts) into a specified account (the “WithdrawDAO” contract).

  
    
      
      
         Specification
      
      
    


	Codename: DAO Fork
	Activation:
    	Block == 1,920,000 on Mainnet


  



See references [1] and [2] for the original, full specification. It is summarized here for convenience.


At block 1880000, the following accounts are encoded into a list L:

	The DAO (0xbb9bc244d798123fde783fcc1c72d3bb8c189413)
	its extraBalance (0x807640a13483f8ac783c557fcdf27be11ea4ac7a)
	all children of the DAO creator (0x4a574510c7014e4ae985403536074abe582adfc8)
	and the extraBalance of each child




Reference list L

```
0xd4fe7bc31cedb7bfb8a345f31e668033056b2728,
0xb3fb0e5aba0e20e5c49d252dfd30e102b171a425,
0x2c19c7f9ae8b751e37aeb2d93a699722395ae18f,
0xecd135fa4f61a655311e86238c92adcd779555d2,
0x1975bd06d486162d5dc297798dfc41edd5d160a7,
0xa3acf3a1e16b1d7c315e23510fdd7847b48234f6,
0x319f70bab6845585f412ec7724b744fec6095c85,
0x06706dd3f2c9abf0a21ddcc6941d9b86f0596936,
0x5c8536898fbb74fc7445814902fd08422eac56d0,
0x6966ab0d485353095148a2155858910e0965b6f9,
0x779543a0491a837ca36ce8c635d6154e3c4911a6,
0x2a5ed960395e2a49b1c758cef4aa15213cfd874c,
0x5c6e67ccd5849c0d29219c4f95f1a7a93b3f5dc5,
0x9c50426be05db97f5d64fc54bf89eff947f0a321,
0x200450f06520bdd6c527622a273333384d870efb,
0xbe8539bfe837b67d1282b2b1d61c3f723966f049,
0x6b0c4d41ba9ab8d8cfb5d379c69a612f2ced8ecb,
0xf1385fb24aad0cd7432824085e42aff90886fef5,
0xd1ac8b1ef1b69ff51d1d401a476e7e612414f091,
0x8163e7fb499e90f8544ea62bbf80d21cd26d9efd,
0x51e0ddd9998364a2eb38588679f0d2c42653e4a6,
0x627a0a960c079c21c34f7612d5d230e01b4ad4c7,
0xf0b1aa0eb660754448a7937c022e30aa692fe0c5,
0x24c4d950dfd4dd1902bbed3508144a54542bba94,
0x9f27daea7aca0aa0446220b98d028715e3bc803d,
0xa5dc5acd6a7968a4554d89d65e59b7fd3bff0f90,
0xd9aef3a1e38a39c16b31d1ace71bca8ef58d315b,
0x63ed5a272de2f6d968408b4acb9024f4cc208ebf,
0x6f6704e5a10332af6672e50b3d9754dc460dfa4d,
0x77ca7b50b6cd7e2f3fa008e24ab793fd56cb15f6,
0x492ea3bb0f3315521c31f273e565b868fc090f17,
0x0ff30d6de14a8224aa97b78aea5388d1c51c1f00,
0x9ea779f907f0b315b364b0cfc39a0fde5b02a416,
0xceaeb481747ca6c540a000c1f3641f8cef161fa7,
0xcc34673c6c40e791051898567a1222daf90be287,
0x579a80d909f346fbfb1189493f521d7f48d52238,
0xe308bd1ac5fda103967359b2712dd89deffb7973,
0x4cb31628079fb14e4bc3cd5e30c2f7489b00960c,
0xac1ecab32727358dba8962a0f3b261731aad9723,
0x4fd6ace747f06ece9c49699c7cabc62d02211f75,
0x440c59b325d2997a134c2c7c60a8c61611212bad,
0x4486a3d68fac6967006d7a517b889fd3f98c102b,
0x9c15b54878ba618f494b38f0ae7443db6af648ba,
0x27b137a85656544b1ccb5a0f2e561a5703c6a68f,
0x21c7fdb9ed8d291d79ffd82eb2c4356ec0d81241,
0x23b75c2f6791eef49c69684db4c6c1f93bf49a50,
0x1ca6abd14d30affe533b24d7a21bff4c2d5e1f3b,
0xb9637156d330c0d605a791f1c31ba5890582fe1c,
0x6131c42fa982e56929107413a9d526fd99405560,
0x1591fc0f688c81fbeb17f5426a162a7024d430c2,
0x542a9515200d14b68e934e9830d91645a980dd7a,
0xc4bbd073882dd2add2424cf47d35213405b01324,
0x782495b7b3355efb2833d56ecb34dc22ad7dfcc4,
0x58b95c9a9d5d26825e70a82b6adb139d3fd829eb,
0x3ba4d81db016dc2890c81f3acec2454bff5aada5,
0xb52042c8ca3f8aa246fa79c3feaa3d959347c0ab,
0xe4ae1efdfc53b73893af49113d8694a057b9c0d1,
0x3c02a7bc0391e86d91b7d144e61c2c01a25a79c5,
0x0737a6b837f97f46ebade41b9bc3e1c509c85c53,
0x97f43a37f595ab5dd318fb46e7a155eae057317a,
0x52c5317c848ba20c7504cb2c8052abd1fde29d03,
0x4863226780fe7c0356454236d3b1c8792785748d,
0x5d2b2e6fcbe3b11d26b525e085ff818dae332479,
0x5f9f3392e9f62f63b8eac0beb55541fc8627f42c,
0x057b56736d32b86616a10f619859c6cd6f59092a,
0x9aa008f65de0b923a2a4f02012ad034a5e2e2192,
0x304a554a310c7e546dfe434669c62820b7d83490,
0x914d1b8b43e92723e64fd0a06f5bdb8dd9b10c79,
0x4deb0033bb26bc534b197e61d19e0733e5679784,
0x07f5c1e1bc2c93e0402f23341973a0e043f7bf8a,
0x35a051a0010aba705c9008d7a7eff6fb88f6ea7b,
0x4fa802324e929786dbda3b8820dc7834e9134a2a,
0x9da397b9e80755301a3b32173283a91c0ef6c87e,
0x8d9edb3054ce5c5774a420ac37ebae0ac02343c6,
0x0101f3be8ebb4bbd39a2e3b9a3639d4259832fd9,
0x5dc28b15dffed94048d73806ce4b7a4612a1d48f,
0xbcf899e6c7d9d5a215ab1e3444c86806fa854c76,
0x12e626b0eebfe86a56d633b9864e389b45dcb260,
0xa2f1ccba9395d7fcb155bba8bc92db9bafaeade7,
0xec8e57756626fdc07c63ad2eafbd28d08e7b0ca5,
0xd164b088bd9108b60d0ca3751da4bceb207b0782,
0x6231b6d0d5e77fe001c2a460bd9584fee60d409b,
0x1cba23d343a983e9b5cfd19496b9a9701ada385f,
0xa82f360a8d3455c5c41366975bde739c37bfeb8a,
0x9fcd2deaff372a39cc679d5c5e4de7bafb0b1339,
0x005f5cee7a43331d5a3d3eec71305925a62f34b6,
0x0e0da70933f4c7849fc0d203f5d1d43b9ae4532d,
0xd131637d5275fd1a68a3200f4ad25c71a2a9522e,
0xbc07118b9ac290e4622f5e77a0853539789effbe,
0x47e7aa56d6bdf3f36be34619660de61275420af8,
0xacd87e28b0c9d1254e868b81cba4cc20d9a32225,
0xadf80daec7ba8dcf15392f1ac611fff65d94f880,
0x5524c55fb03cf21f549444ccbecb664d0acad706,
0x40b803a9abce16f50f36a77ba41180eb90023925,
0xfe24cdd8648121a43a7c86d289be4dd2951ed49f,
0x17802f43a0137c506ba92291391a8a8f207f487d,
0x253488078a4edf4d6f42f113d1e62836a942cf1a,
0x86af3e9626fce1957c82e88cbf04ddf3a2ed7915,
0xb136707642a4ea12fb4bae820f03d2562ebff487,
0xdbe9b615a3ae8709af8b93336ce9b477e4ac0940,
0xf14c14075d6c4ed84b86798af0956deef67365b5,
0xca544e5c4687d109611d0f8f928b53a25af72448,
0xaeeb8ff27288bdabc0fa5ebb731b6f409507516c,
0xcbb9d3703e651b0d496cdefb8b92c25aeb2171f7,
0x6d87578288b6cb5549d5076a207456a1f6a63dc0,
0xb2c6f0dfbb716ac562e2d85d6cb2f8d5ee87603e,
0xaccc230e8a6e5be9160b8cdf2864dd2a001c28b6,
0x2b3455ec7fedf16e646268bf88846bd7a2319bb2,
0x4613f3bca5c44ea06337a9e439fbc6d42e501d0a,
0xd343b217de44030afaa275f54d31a9317c7f441e,
0x84ef4b2357079cd7a7c69fd7a37cd0609a679106,
0xda2fef9e4a3230988ff17df2165440f37e8b1708,
0xf4c64518ea10f995918a454158c6b61407ea345c,
0x7602b46df5390e432ef1c307d4f2c9ff6d65cc97,
0xbb9bc244d798123fde783fcc1c72d3bb8c189413,
0x807640a13483f8ac783c557fcdf27be11ea4ac7a
```


At the beginning of block 1920000, all ether throughout all accounts in L will be transferred to a contract deployed at 0xbf4ed7b27f1d666546e30d74d50d173d20bca754. The contract was created from the following Solidity code (compiler version v0.3.5-2016-07-01-48238c9):


// Deployed on mainnet at 0xbf4ed7b27f1d666546e30d74d50d173d20bca754

contract DAO {
    function balanceOf(address addr) returns (uint);
    function transferFrom(address from, address to, uint balance) returns (bool);
    uint public totalSupply;
}

contract WithdrawDAO {
    DAO constant public mainDAO = DAO(0xbb9bc244d798123fde783fcc1c72d3bb8c189413);
    address public trustee = 0xda4a4626d3e16e094de3225a751aab7128e96526;

    function withdraw(){
        uint balance = mainDAO.balanceOf(msg.sender);

        if (!mainDAO.transferFrom(msg.sender, this, balance) || !msg.sender.send(balance))
            throw;
    }

    function trusteeWithdraw() {
        trustee.send((this.balance + mainDAO.balanceOf(this)) - mainDAO.totalSupply());
    }
}





This contract is deployed on Mainnet in block 1883496 in transaction hash 0xfeae1ff3cf9b6927d607744e3883ea105fb16042d4639857d9cfce3eba644286. The deployment code of the contract is:


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





This deployment results in the runtime bytecode:


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





Blocks with block numbers in the range [1_920_000, 1_920_009] MUST have 0x64616f2d686172642d666f726b (hex encoded ASCII string dao-hard-fork) in the extraData field of the block.

  
    
      
      
         References
      
      
    


	https://blog.slock.it/hard-fork-specification-24b889e70703
	https://blog.ethereum.org/2016/07/15/to-fork-or-not-to-fork/


  
    
      
      
         Copyright
      
      
    


Copyright and related rights waived via CC0.


  Citation

  Please cite this document as:

  
  Casey Detrio (@cdetrio), "EIP-779: Hardfork Meta: DAO Fork," Ethereum Improvement Proposals, no. 779, November 2017. [Online serial]. Available: https://eips.ethereum.org/EIPS/eip-779.






      
    
  

  

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