_Follow along the course with this video._ --- ### ERC20 Deploy Script With our simple token contract written, we'll of course want to test and deploy it. Let's get started with writing a deploy script. In your workspace's `script` folder, create a file named `DeployOurToken.s.sol`. We expect OurToken to behave the same, regardless of the chain it's deployed on, so we don't really need a `HelperConfig` for this example. We'll skip that step and move write into writing the deploy script. To begin, we can import Script and OurToken as well as add the skeleton of our run function: ```solidity // SPDX-License-Identifier: MIT pragma solidity ^0.8.18; import {Script} from "forge-std/Script.sol"; import {OurToken} from "../src/OurToken.sol"; contract DeployOurToken is Script { function run() external {} } ``` We're going to keep this really basic, we just want to deploy OurToken. We know that OurToken requires an initial supply as a constructor parameter, so let's declare that and then deploy our contract. ```solidity // SPDX-License-Identifier: MIT pragma solidity ^0.8.18; import {Script} from "forge-std/Script.sol"; import {OurToken} from "../src/OurToken.sol"; contract DeployOurToken is Script { uint256 public constant INITIAL_SUPPLY = 1000 ether; function run() external returns (OurToken) { vm.startBroadcast(); OurToken ot = new OurToken(INITIAL_SUPPLY); vm.stopBroadcast(); return ot; } } ``` Our deploy script looks great! To make things a little easier on ourselves when using the CLI to run this script, copy the Makefile from the course GitHub repo and add this to our workspace (I've included it below to copy if needed). ### Makefile ```make -include .env .PHONY: all test clean deploy fund help install snapshot format anvil DEFAULT_ANVIL_KEY := 0xac0974bec39a17e36ba4a6b4d238ff944bacb478cbed5efcae784d7bf4f2ff80 help: @echo "Usage:" @echo " make deploy [ARGS=...]\n example: make deploy ARGS=\"--network sepolia\"" @echo "" @echo " make fund [ARGS=...]\n example: make deploy ARGS=\"--network sepolia\"" all: clean remove install update build # Clean the repo clean :; forge clean # Remove modules remove :; rm -rf .gitmodules && rm -rf .git/modules/* && rm -rf lib && touch .gitmodules && git add . && git commit -m "modules" install :; forge install Cyfrin/foundry-devops@0.0.11 --no-commit --no-commit && forge install foundry-rs/forge-std@v1.5.3 --no-commit && forge install openzeppelin/openzeppelin-contracts@v4.8.3 --no-commit # Update Dependencies update:; forge update build:; forge build test :; forge test snapshot :; forge snapshot format :; forge fmt anvil :; anvil -m 'test test test test test test test test test test test junk' --steps-tracing --block-time 1 NETWORK_ARGS := --rpc-url http://localhost:8545 --private-key $(DEFAULT_ANVIL_KEY) --broadcast ifeq ($(findstring --network sepolia,$(ARGS)),--network sepolia) NETWORK_ARGS := --rpc-url $(SEPOLIA_RPC_URL) --private-key $(PRIVATE_KEY) --broadcast --verify --etherscan-api-key $(ETHERSCAN_API_KEY) -vvvv endif deploy: @forge script script/DeployOurToken.s.sol:DeployOurToken $(NETWORK_ARGS) # cast abi-encode "constructor(uint256)" 1000000000000000000000000 -> 0x00000000000000000000000000000000000000000000d3c21bcecceda1000000 # Update with your contract address, constructor arguments and anything else verify: @forge verify-contract --chain-id 11155111 --num-of-optimizations 200 --watch --constructor-args 0x00000000000000000000000000000000000000000000d3c21bcecceda1000000 --etherscan-api-key $(ETHERSCAN_API_KEY) --compiler-version v0.8.19+commit.7dd6d404 0x089dc24123e0a27d44282a1ccc2fd815989e3300 src/OurToken.sol:OurToken ``` Now, by running `make anvil` (open a new terminal once your chain has started!) followed by `make deploy`... ::image{src='/foundry-erc20s/4-erc20-deploy-script/erc20-deploy-script1.png' style='width: 100%; height: auto;'} ### Wrap Up Woo! Deployment to our anvil chain successful, let's go! In the next lesson, we'll test our contracts with the help of some AI tools and recap everything we've gone over so far. See you there!