There are three types of unsuccessful transactions. You can check the following why it happens and how to solve this issue.
- Unsubmitted transaction
Cause: transfer request has not been accepted on chain.
Solution: send it again.
- Transaction pending
Cause: miner/gas fee is too low.
Solution: Be patient and wait. Eventually it will get through.
- Transaction failed
Cause: Gas is insufficient, or a smart contract issue.
Solution: increase your gas limit and send it again.
- Your assets will not be deducted before the transaction is successful.
- If the transaction fails, the gas fee will still be charged and will not be refunded. The fees are used to pay the miner to package your transaction. Every transaction has a fee irrespective of the status of the transaction.
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