Most common errors

Transaction errors

If you encounter any of the following errors when making a transfer or swap:

'Failed to send transaction' (or Error!)
'An error occurred'
'Insufficient funds'
'Failed to calculate fee'
'Unknown'

It usually means that your wallet doesn't have enough TON or battery charges to cover the network fee. Required amounts for successful transactions:

0.1 TON (~30 Battery charges) — to send TON or other tokens.
0.3 TON (90–120 Battery charges) — to swap TON or other tokens.
0.1 TON (~4 Battery charges) — to send NFTs.
250-500 battery charges — exclusively for USDT (TRC20) transfers.

Also, ensure you are using the latest version of Tonkeeper!

Emulation failed

The 'Emulation failed' error occurs when your wallet doesn’t have enough TON to cover the network fee. Swaps require at least 0.3 TON (90-120 Battery charges), and token transfers require at least 0.1 TON (~30 Battery charges).

This error may also appear when purchasing Battery charges if the total amount is less than $3. For example, if you’re charging the Battery using NOT, the token amount must be equivalent to $3.

Error 'Failed. Increase the slippage tolerance in the swap settings to avoid this error'.

This error happens when the token price changes between when you create the transaction and when it’s executed. For example, the price may have unexpectedly gone up or down.

To fix this, increase the Slippage Tolerance. To do this, tap 'Swap', then click the settings icon in the top left corner and adjust the slippage percentage as needed.