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function getHash(
    address _signer,
    address _recipient,
    uint _transactionObjectValueField,
    bytes memory _transactionObjectDataField,
    address _rewardTokenAddress,
    uint _rewardAmount
)
 public

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Eidoo Hybrid Exchange CLI sheet

All the following commands are runned from the https://github.com/eidoo/hybrid-exchange-sdk root folder.

CREATE KEYSTORE

node bin/hybrid-exchange-cli.js ethereum-wallet keystore-generate --ksp .

CREATE TRADING WALLET

node bin/hybrid-exchange-cli.js trading-wallet create-wallet --eoa EXTERNAL_OWNED_ACCOUNT --ksp KEYSTORE_PATH

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echo "Stopping container.."
docker stop keosd
docker stop nodeos

echo "Removing container.."
docker rm keosd
docker rm nodeos

echo "Removing network.."
docker network rm eosdev

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# be sure that the docker daemon is running before you start this script
#
# this script will create an alias at the end, so please run it with:
#
# source starteos.sh
#
# see https://developers.eos.io/eosio-nodeos/docs/docker-quickstart

docker pull eosio/eos-dev:v1.2.5 # pull eosio image
docker network create eosdev # create an eos network(see docker networking)

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pragma solidity ^0.5.2;

/**
 * @title ERC20 interface
 * @dev see https://github.com/ethereum/EIPs/issues/20
 */
interface IERC20 {
    function transfer(address to, uint256 value) external returns (bool);

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contract Wallet {
  ...
  address public logic_;
  /**
   * @dev Deposit any ERC20 token into this wallet.
   * @param _token The address of the existing token contract.
   * @param _amount The amount of tokens to deposit.
   * @return Bool if the deposit was successful.
 */

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Get Smart Contract instance bytecode and hashed bytecode

Minimal SC sample exposing a way to get the bytecode and the hashed bytecode of a deployed smart contract.
This without the new OPCODE of EIP1052

pragma solidity ^0.4.24;

contract SomeContractInstance {
    constructor () public {}
}

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Next-Gen JavaScript

let & const

About let : https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/let
About const : https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/const

let and const basically replace var.
You use let instead of var and const instead of var if you plan on never re-assigning this "variable" (effectively turning it into a constant therefore).

Remember they are block scoped.

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JavaScript array functions

map() , filter() , reduce() etc.

The following page gives a good overview over the various methods you can use on the array prototype.
Feel free to click through them and refresh your knowledge as required:

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array

Particularly important are:

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Flask - Apache2

Project structure

Useful link for requirements: How To Deploy a Flask Application on an Ubuntu VPS

Under /var/www folder you should have a structure like following

/var/www/
/var/www/project-name/
/var/www/project-name/project-name.wsgi
/var/www/project-name/project/__init__.py