usddex io Troubleshooting Guide: Fix Failed Swaps, Stuck Transactions, and Missing Tokens

Most problems have simple causes

When something goes wrong on usddex io, it’s usually not mysterious. Failed swaps, pending transactions, and “missing” tokens are common DeFi experiences, and they typically come down to a few root issues: network settings, slippage, approvals, gas, or wallet display quirks.

This guide walks through the most frequent problems and how to fix them without guesswork.

Problem 1: “Swap failed” or “Transaction reverted”

A reverted transaction means the swap did not execute and state changes were rolled back. You may still pay a network fee, depending on the situation.

Most common causes and fixes:

Slippage tolerance too low

If the market moved while your transaction was pending, it may have exceeded your slippage tolerance.

Fix:

  • Try again with a slightly higher slippage tolerance.
  • If volatility is high, reduce your trade size rather than raising slippage too much.
  • Increase gas priority so the transaction confirms faster (if your wallet allows).

Insufficient gas or fee token

Even if you have enough of the token you’re swapping, you still need the network’s fee token.

Fix:

  • Top up a small amount of the native token used for fees.
  • Retry the swap once your wallet balance updates.

Approval not completed

If you skipped the approval step or it failed, the swap can’t spend your token.

Fix:

  • Submit the approval transaction first and wait for confirmation.
  • Then re-run the swap.

Problem 2: Transaction stuck “Pending” for a long time

A pending transaction usually means it hasn’t been included in a block yet. This is common during network congestion or when the gas fee you offered is too low.

Fix options (choose based on your wallet features):

  • Speed up: Increase the fee to replace the transaction with a faster one (same nonce).
  • Cancel: Submit a cancellation transaction (often a 0-value transfer to yourself with the same nonce and higher fee).
  • Wait: If congestion clears, it may confirm eventually, but be aware the quote may become stale.

Important note: if you attempt another swap while one is pending, you can create nonce conflicts or stack transactions unexpectedly. It’s usually best to resolve the pending one first.

For more in-depth guides and related topics, be sure to check out our homepage where we cover a wide range of subjects.

Problem 3: Wrong network or “Unsupported chain” messages

If your wallet is on a different network than the one you’re trying to use on usddex io, swaps won’t work properly.

Fix:

  • Switch your wallet to the correct network.
  • Refresh usddex io after switching.
  • If you’re using multiple networks, confirm you’re viewing the right asset balances for that chain.

Problem 4: Tokens not showing up in your wallet after a successful swap

If the transaction is confirmed on-chain but your wallet doesn’t display the token, the token may simply not be added to your wallet’s asset list.

Fix:

  • Find the token’s contract address from a reliable source.
  • Use your wallet’s “Add token” feature and paste the contract address.
  • Confirm decimals and symbol auto-fill correctly.

Also check that you’re looking at the correct network inside your wallet. It’s easy to confirm a transaction on one chain and then view a different chain’s balances.

Problem 5: Quote changes too fast or “Insufficient liquidity”

If liquidity is thin or the market is moving quickly, the quote can update constantly or the platform may indicate insufficient liquidity.

Fix:

  • Reduce the trade size to fit available liquidity.
  • Try a more liquid route by swapping through a major asset first (depending on available pairs).
  • Wait for better liquidity conditions rather than forcing a trade at a poor rate.

Sometimes, what looks like a technical issue is actually the market telling you the pair is not deep enough for your order.

Problem 6: Approval succeeded, but swap still fails

This can happen if:
  • You approved a smaller amount than you’re trying to swap.
  • The token has transfer restrictions, taxes, or unusual mechanics.
  • The market moved and slippage was too low.

Fix:

  • Check the approved allowance amount and increase it if needed.
  • Try swapping a smaller amount to test behavior.
  • If the token has complex mechanics, consider avoiding it or researching how it trades on DEXs.

A clean troubleshooting workflow

When you encounter an issue on usddex io, use this order of operations:
  • Confirm you’re on the correct network and the correct site.
  • Check you have enough fee token for gas.
  • Check whether approval is needed and confirmed.
  • Review slippage tolerance and price impact.
  • If pending: speed up or cancel, then retry.
  • If tokens missing: add the token by contract address.

By following this consistent workflow, you can solve the majority of issues in minutes without panic. DeFi feels complex until you recognize the patterns—then troubleshooting becomes a simple checklist you can reuse every time.

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