Swap failed but gas was charged: what happened?
Find out why a reverted swap still costs gas, how to verify the receipt, what happens to your input tokens and what to check before retrying.
Explore the reference
Fix a swap problem
Identify failed, pending or unexpected transactions using the evidence recorded on-chain.
50 guides · Page 1 of 3
A token transfer is paused or your address is blocked
Recognize token-level pause or address restrictions that a wallet setting cannot override.
Allowance too low after a successful approval
Compare the current spender allowance with the actual amount required after an approval appears to have succeeded.
Approval is pending: should I submit the swap anyway?
Understand what a pending approval means for your next swap and how to avoid stale quotes or duplicate permission transactions.
Can I cancel a pending swap after signing?
Understand the limits and cost of attempting to replace a pending swap with a cancellation transaction.
Does a successful transaction receipt prove my swap completed?
A successful outer transaction does not always prove every intended swap step ran; verify settlement and recipient balances.
Dropped and replaced swap: which transaction matters?
Follow the confirmed replacement hash to determine whether an earlier pending swap executed, changed or was cancelled.
Dropped swap with no replacement: when is retrying reasonable?
A dropped transaction can reappear, so verify account nonce and submission state before retrying a swap.
Enough tokens to swap, but insufficient funds for gas
Why an account with enough input tokens can still be unable to pay for approval or swap execution.
Explorer says confirmed but my wallet still says pending
Resolve disagreement between a wallet’s pending label and a confirmed explorer transaction without submitting a duplicate swap.
Gas estimation failed before a swap: should I continue?
Understand what a failed preflight estimate is warning about and why entering a manual gas limit may not fix a swap.
Hardware wallet not detected at swap confirmation
Diagnose device connection and signing failures without exposing the hardware wallet’s recovery phrase.
How to identify your actual input and output in a swap receipt
Trace the assets that actually left and entered your account without double counting router and pool transfers.
I approved a token but received nothing: did I swap?
Identify whether your confirmed transaction granted a token allowance or actually exchanged tokens, then resume the correct step.
I clicked Swap twice: can both transactions execute?
Determine whether repeated swap clicks created duplicate requests, same-nonce replacements or two independently executable trades.
Invalid permit nonce after signing a swap
Distinguish a consumed permit nonce from the wallet account’s transaction nonce when a signed authorization stops working.
Is my swap pending, failed, or never submitted?
Use the transaction hash, block inclusion and receipt to distinguish a waiting swap from a reverted or unsubmitted request.
My swap reverted without an error message: what can I check?
Collect useful evidence when an explorer reports execution reverted without decoding a clear reason.
No swap route found: liquidity problem or unsupported token?
Identify whether a missing route reflects token identity, unsupported execution or insufficient liquidity for your exact request.
Nonce too low during a swap: check what already confirmed
Check confirmed and replaced transactions before treating a nonce-too-low message as a reason to submit another swap.