A SyncSwap swap on an Ethereum layer-2 network usually completes in seconds; up to two minutes can be normal while the wallet receives an L2 confirmation. Longer waits usually mean an approval, RPC, fee, congestion, or slippage problem—not a fixed SyncSwap timer.
A token swap has several separate waiting points, and each one suggests a different fix:
approve transaction before the swap.On zkSync Era, the protocol documentation says an L2 block is generated every one second, so actual inclusion can be fast once the transaction reaches the network. The apparent delay often happens before submission or after confirmation, while a wallet, RPC provider, or block explorer catches up. ZKsync’s block documentation explains how those L2 blocks and larger batches are formed.
The first swap of an ERC-20 token often takes two transactions: an approval that allows the router contract to spend the token, followed by the swap itself. If the approval is still waiting for a signature, SyncSwap has not received the swap transaction yet.
That makes the wallet’s wording important. “Confirm approval” means the user is still at the permission stage. “Confirm swap” means the allowance step is complete. If the wallet shows neither prompt, the browser tab may have lost its connection to the wallet extension or the RPC endpoint.
Gas is the unit used to measure computational work on Ethereum-style networks. A contract interaction such as a swap consumes gas, and its fee is calculated from the gas used and the applicable fee per unit. Ethereum’s gas documentation explains the difference between the protocol-set base fee and the user’s priority fee.
On EIP-1559-style transactions, the wallet typically sets maxFeePerGas and maxPriorityFeePerGas. A transaction can wait if its effective fee settings are not attractive enough for inclusion, although an L2 usually makes this less visible than Ethereum mainnet.
If someone asked me, I would tell them to find the transaction hash before touching slippage or sending another swap. The hash tells whether the transaction exists on-chain and which stage is actually slow.
| Wallet status | What it usually means | Best next check |
|---|---|---|
| Awaiting signature | The transaction has not been sent. | Complete or reject the wallet prompt. |
| Submitted but no hash | The interface or RPC may not have returned the transaction identifier. | Reconnect the wallet and check the correct network. |
| Pending | The chain has received the transaction, but it is not included yet. | Open the transaction in the network’s explorer. |
| Confirmed | The swap was included successfully. | Refresh the wallet balance and token list. |
| Reverted or failed | The contract rejected execution. | Read the revert reason before retrying. |
A nonce is the account’s transaction counter; it helps prevent the same signed transaction from being replayed. If an earlier transaction with the same account is stuck, later transactions may wait behind it. Ethereum’s glossary defines the nonce and its role in transaction ordering.