Stage 2: Token Deployment¶

Important

The following videos may make note of the use of something called “Docker” and “containers”, but do note that Docker has since been omitted. The same commands that are mentioned may be run directly on the machine without entering into the noted container.

Video Tutorial

Start up your Ethereum node, ganache

Back within your terminal window where the npm start command was run, create a new terminal window, or tab, to run your blockchain
Note

While within the terminal window select File -> Open Terminal to create a new window.

To create a new tab from within a terminal window:
ctrl+shft+t
Example output: Result is a new empty terminal, in the same directory you were in.
adam@adam:~/Desktop/blg/wallet-template$
Then run the blockchain emulation with the below command:
ganache-cli
Example output:
# ganache-cli
Ganache CLI v6.0.3 (ganache-core: 2.0.2)
[...]
Listening on localhost:8545

Open the application’s code in the Sublime text editor, time to get to some coding…

Open the Sublime text editor by clicking on the Sublime icon in the left dock.

From within Sublime open the wallet-template folder. Click on File in the top left corner and select Open Folder... in the menu. Select Desktop/blg/wallet-template to open, and we can get to coding!

Video Tutorial

Note

A default, and required, initial migration script(src/migrations/1_initial_migration.js), has been included. Do not remove this script.

Write the Deployment Script

Create a new file in order to deploy the token, src/migrations/2_deploy_contracts.js

Simply right-click on the migrations directory and select New File from the drop down menu to create the new file.

Select File => Save As and then enter the name of the file: 2_deploy_contracts.js, click the Save button in the bottom right corner.

Time to add some code to this new file!

Import the token’s artifacts, line 1
const Token = artifacts.require("./Token.sol");
Define the owner account, line 2 - Note that the truffle migrate command exposes the web3 object globally which is connected to your ganache node

and therefore has access to all of the default 10 accounts.
const owner = web3.eth.accounts[0];
Utilize truffle’s deployer object in order to deploy an instance of the token, line 4-6 - This deployer is a utility that truffle provides within its framework to make sending contract creation transactions as easy as the one line below! - This function will be exported so that it may be executed by the truffle migrate command
module.exports = deployer => {
  deployer.deploy(Token, { from: owner });
}
Important

Don’t forget to save!

This may be done either by selecting File => Save or via ctrl+s on the keyboard.

Deploy your Token

Important

Now back within your terminal window where the truffle test command was recently run…

Ensure you are still in the src directory!

truffle migrate --reset

Example output:

# truffle migrate --reset
Using network 'development'.

Running migration: 1_initial_migration.js
  Deploying Migrations...
  ... 0x26ff3f480502a228f34363e938289c3164edf8bc49c75f5d6d9623a05da92dbf
  Migrations: 0x3e47fad1423cbf6bd97fee18ae2de546b0e9188a
Saving successful migration to network...
  ... 0x19a7a819df452847f34815e2573765be8c26bac43b1c10d3b7528e6d952ac02c
Saving artifacts...
Running migration: 2_deploy_contracts.js
  Deploying Token...
  ... 0x4a69e7840d0f96067964fb515ffea1a04a98fc5759849d3308584af4770c8f7b
  Token: 0xd58c6b5e848d70fd94693a370045968c0bc762a7
Saving successful migration to network...
  ... 0xd1e9bef5f19bb37daa200d7e563f4fa438da60dbc349f408d1982f8626b3c202
Saving artifacts...
#

Important

You just sent your first contract creation transaction via the truffle framework, well done!

As above, the Token contract has been created at address: 0xd58c6b5e848d70fd94693a370045968c0bc762a7, note that yours will almost certainly be created at a different address!

Also the Migrations contract was created which is nothing to worry about but just a utility the truffle framework uses to monitor the status of your transactions.

If you have a look back at ganache and select on the Transactions tab you will see the Contract Creation transactions that were sent and lots of other data too!