🌐 It's time to swap! Let's trade our WETH for another ERC20 token using @Uniswap's Swap Router on our @ZKsync fork. We'll utilize `cast send` to perform the swap. Ready to trade? 🧵👇

Step 1: Find the Swap Router Address

Set the Uniswap Swap Router address in your `.env` and run source .env to update your variables.

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Step 2: Approve WETH for Swapping

Allow the Swap Router to spend your WETH.

Replace `<AMOUNT_IN>` with the amount you want to swap (in wei). 📝 Again you can use this converter to easily get the amount in wei

Step 2: Approve WETH for Swapping

Allow the Swap Router to spend your WETH.

Replace `<AMOUNT_IN>` with the amount you want to swap (in wei). 📝 Again you can use this converter to easily get the amount in wei https://eth-converter.com/

Step 3: Select an ERC20 Token

Choose a token to swap into. Find one from the ZKsync Tokens List (https://era.zksync.io/tokens) and set. Make sure to use a more popular token to make sure there is plenty of liquidity for swapping.

Step 4: Determine the Fee Tier

Use https://app.uniswap.org/explore/pools/zksync to find a pool with plenty of liquidity. Choose the fee tier for the pool you're swapping in (e.g., `3000` for 0.3% fee).

💡Test your Foundry skills: You can also use cast call to read what the fee is for the pool address you chose.

Step 5: Prepare Swap Parameters

Calculate `amountOutMinimum` to protect against slippage. Use expected rates minus your slippage tolerance (e.g., 1%). Use tools like @krakenfx Convert https://www.kraken.com/convert for estimates. ⚖️

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Step 6: Prepare your .env

We’ll take the time to make sure we have all our variables set and run `source .env` before moving on to the next step

Step 7: Perform the Swap

Execute the swap. Set `SQRT_PRICE_LIMIT_X96` to `0` to accept market price (we can get into that math lesson another time). 🔄

In the output after executing you can see the status of the transaction in your terminal 🤗

Step 8: Verify the Swap

Check your new ERC20 balance and you'll see you successfully swapped tokens! 🎉

zkSync

Swapping tokens on @uniswap via the command line empowers ZKsync Devs to interact directly with /zksync Era mainnet without having to use real funds. Thanks for following along and keep an eye out for the release of this in the Community Code

Swapping tokens on @uniswap via the command line empowers ZKsync Devs to interact directly with /zksync Era mainnet without having to use real funds. Thanks for following along and keep an eye out for the release of this in the Community Code https://code.zksync.io/