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Metamask: Token Swap Not Working on Uniswap v2

I’m a web3 developer, and I’ve been experiencing issues with token swaps on the popular decentralized exchange (DEX) platform Uniswap v2. While my swap from ETH to my native token is functioning correctly, I have encountered problems with the reverse swap from my native token to ETH.

The Issue:

After conducting some troubleshooting, I’ve identified the following issue:

• My Metamask wallet has been updated to version 1.9.0 or higher.

• I have a MetaMask seed phrase and have generated new private keys for both my ETH wallet and my Token wallet.

Steps to Reproduce:

To help others who may be experiencing similar issues, here are the steps I’ve taken:

• Metamask Version: Make sure your Metamask wallet is running version 1.9.0 or higher.

• Wallet Seed Phrases: Verify that you have generated a new private key for both your ETH wallet and your Token wallet using MetaMask’s seed phrase feature.

• Swap Settings: Double-check the swap settings on Uniswap v2, including the swap direction (ETH to Token, or Token to ETH) and any relevant liquidity provider settings.

Potential Causes:

Based on my research, I’ve identified a few potential causes for this issue:

• Network congestion: If the network is experiencing high congestion or large volumes of swaps, it may cause issues with token swaps.

• Liquidity pool configuration: Incorrectly configured liquidity pools can lead to errors during token swaps.

• Swap rules: Make sure that your swap rules are set correctly on Uniswap v2.

Resolution:

To resolve the issue, I recommend:

• Disable Swap Rules: Try disabling any swap rules that may be causing issues with token swaps (e.g., allowing large liquidity pool sizes or specific swap directions).

• Update Metamask Wallet: Consider updating your Metamask Wallet to version 1.9.0 or higher.

• Check Liquidity Pool Configuration: Verify that your liquidity pools are correctly configured on Uniswap v2.

Conclusion:

While I’ve encountered some issues with token swaps on Uniswap v2, I’m confident that a simple update to Metamask and some troubleshooting steps can solve the problem. If you’re experiencing similar issues, try disabling swap rules, updating your wallet, and checking the liquidity pool configuration. With a few tweaks, your token swaps should be working correctly again!