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Outline

•  contract Echoer *
•    - function echo(bytes calldata _data)

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/**
 *Submitted for verification at Etherscan.io on 2021-02-12
*/

pragma solidity ^0.6.0;

contract Echoer {
  event Echo(address indexed who, bytes data);

  function echo(bytes calldata _data) external {
    emit Echo(msg.sender, _data);
  }
}

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[{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"who","type":"address"},{"indexed":false,"internalType":"bytes","name":"data","type":"bytes"}],"name":"Echo","type":"event"},{"inputs":[{"internalType":"bytes","name":"_data","type":"bytes"}],"name":"echo","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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ipfs://b2b76e4e9a947b5f56659743735868b5b279bd7e1190f0b7f46f9d0160be8b88