A user had accidentally sent 2100 Ethereum as a transaction fee which was verified by Sparkpool. According to Sparkpool, they on 25th February, they received an email claiming that the user had mistakenly sent 2100 Ethereum as mining fee on 19th February which was more than $300,000.
What happened next?
Sparkpool was generous enough to reply to the email asking the user to verify himself as the owner of the ethereum account from which the transaction was made. Sparkpool asked the user to send 0.022517 ETH on the mining pool’s ethereum address from the same address (0x587ecf600d304f831201c30ea0845118dd57516e) from which the transaction was made.
According to what Sparkpool asked him to do, the user sent the same amount of ETH (0.022517) to Sparkpool’s address on the same day to confirm his identity as the owner of the address. After confirmation, Sparkpool negotiated on the term that they are going to keep half of the amount of ETH i.e. 1050 ETH for the pool miners and the rest half they are going to return to the user.
The user sent another transaction to Sparkpool’s address to confirm the negotiation made by Sparkpool. This transaction was worth 0.666 ETH and also contained a coded paragraph in which the user thanked Sparkpool and their miners for helping them and that they are willing to share 1050 ETH with the miners after which Sparkpool returned 1050 ETH to the user.