CREATE2 proxy for constantinople/petersburg

Create2Proxy.sol

// CREATE2 proxy for constantinople/petersburg which allows easy deploying of
// contracts using the same address on multiple chains.
//
// Idea by @Arachnid. Some code by @axic.

pragma solidity ^0.5.0;

contract Create2Proxy {
  function() external payable {
    assembly {
      let payload_length := sub(calldatasize(), 32)
      calldatacopy(0, 32, payload_length)
      mstore(0, create2(callvalue(), 0, payload_length, calldataload(0)))
      return(0, 32)
    }
  }
}