Lottery Bot
Here is how to get this bot started on a development envirnoment.
Exercise inspired from this article here.
Start geth and unlock the accounts
Please refer to the README for Geth on how to install and setup on your local dev environment or to a testnet environment.
Run the command below. You will need to create your own accounts in Geth and unlock them.
geth --datadir ./geth-test --networkid 15
Attach a terminal to the local geth node
geth attach ./geth-test/geth.ipc
Add helper scripts to geth
In the geth console that you are attached to, drop this into the console
loadScript('./geth/checkAllBalances.js')
loadScript('./geth/checkWork.js')
loadScript('./geth/unlockAllAccounts.js')
Feel free to take a look at each of these scripts inthe geth folder of this repo.
At this point you might need to create some local test accounts set one as the setEtherbase, mine and transfer funds as well as manually unlock these accounts. You can do so by following the instructions here.
Run the loaded functions
The checkWork function ensures that gethonly mines when there are transactions in the txpool. Note you need to load the script (using loadScript as shown above) before you can run this in the geth console.
checkWork()
Unlock all the accounts using the unlockAllAccounts script. This script makes some assumtions about the accounts that you have created and the passwords you have used. Feel free to modify this script to suite your own accounts setup.
unlockAllAccounts()
For fun, you can also run the checkAllBalances() function too:
checkAllBalances()
From the geth terminal, inpect the txpool which should be empty
Take a look at the txpool - it should be empty
txpool.inspect
Start the txSimulater
This simulates small transactions of ether between two accounts.
node simulator/traffic
Initialize the Bot
Be sure to have your .env file in the root of this project and correctly filled out.
node bot/init
Call releaseNextIncrement as the owner of the lottery contract
node simulator/lottery
If you see execution reverted: The counter needs to be incremented first then you need to manually run the increment() function on the smart contract using truffle console terminal (see below).
Check the bot output
You should see that the SniperBot fires a number of transactions. One of them will go through. Both the bot and the lottery simulator show the latest block after. This usually is the block that both transactions were mined in.
Review the CounterContract results
In truffle console window run. The winner should be the bot.
sc = await SimpleCounter.deployed()
(await sc.getCounter()).toString()
counter = await sc.getCounter()
sc.winners(counter) // shows the address of that winner
sc.winners(counter+1) // should be an unclaimed slot (address 0x0)
If you need to manually increment the counter then run that function as follows
sc.increment()
Terminal screen capture
I had many terminal windows open while testing this:
