Getting Started for foundry

Requirements

Please install the following:

• Git
  • You'll know you've done it right if you can run git --version
• Foundry / Foundryup
  • This will install forge, cast, and anvil. Installation Instructions
  • You can test you've installed them right by running forge --version

Quickstart

git clone https://github.com/fullstack-development/Uniswap-v2-Fork-SC.git
cd UNISWAP-V2-FORK-SC
forge install
forge build

Deploying to a network

Setup

You need to create a file .env in the project and add the following variables to it:

• POLYGON_TESTNET_RPC_URL: A URL to connect to the zkEvm Polygon testnet. You can get one for free from here.
• POLYGON_MAINNET_RPC_URL: A URL to connect to the zkEVM Polygon mainnet.
• PRIVATE_KEY: A private key from your deploying wallet. You can get a private key from a new Metamask account.
• POLYSCAN_API_KEY: To verify a contract on zkevm polygonscan.

Deploying

We have two --rpc-url options:

• testnet is zkEVMPolygonTestnet
• mainnet is zkEVMPolygonMainnet

You can choice option depends on the network you want to deploy to.

1. Deploy uniswapV2 Factory

To deploy uniswapV2 Factory, you will need to pass _FEETOSETTER address right after --constructor-args in the code below. The wallet allowed to set the fees’ wallet

source .env
forge create src/v2-core/UniswapV2Factory.sol:UniswapV2Factory --rpc-url zkEVMPolygonTestnet --private-key ${PRIVATE_KEY} --constructor-args "putFeeToSetterAddressHere" --legacy

if you are windows user, you might have error - "Failed to create wallet from private key. Private key is invalid hex: Odd number of digits"

To resolve this problem, you need to remove the \r symbol from private key. To do it, you can run PRIVATE_KEY=$(echo $PRIVATE_KEY | tr -d '\r')

Save the address of Fabric contract.

Now, to get initial code hash of the Pair contract, we need to install ethers library and run computation script.

npm install --save ethers and node ./script/compute.js

node ./script/compute.js

Save this initial code hash

1. Deploy uniswapV2 Router

We need to put our initial code hash of the Pair contract to the library called UniswapV2Library.sol

We insert (line 24) the INIT_CODE_HASH we saved earlier without the leading “0x”.

To deploy UniswapV2Router02, you will need to pass _FACTORY and _WETH addresses right after --constructor-args in the code below.

We put Factory address that we saved earlier as the first constructor argument. As the second argument for zkEVM polygon mainnet we can use WETH address.

If we want to deploy to testnet, we can use this command to deploy our WETH contract.

forge create src/erc-20-tokens/WETH.sol:WETH9 --rpc-url zkEVMPolygonTestnet --private-key 'privateKey' --legacy

Now we are ready to run deploy with this command:

forge create src/v2-periphery/UniswapV2Router02.sol:UniswapV2Router02 --rpc-url zkEVMPolygonTestnet --private-key ${PRIVATE_KEY} --constructor-args "factoryAddressPutHere" "WETHAddressPutHere" --legacy

To be able to make batch requests to smart contracts as frontend, you will need to deploy Multicall contract:

forge create src/Multicall.sol:Multicall --rpc-url zkEVMPolygonTestnet --private-key ${PRIVATE_KEY} --legacy

if you want to deploy erc-20 tokens to test your protocol, you can use this code below. It will deploy all erc-20 tokens in erc-20-tokens folder and mint those tokens to your account.

chmod +x ./script/deploy.sh

source .env
./script/deploy.sh putYourWalletAddressHere

deployed addresses here