> Coindesk reported at the time that the South Korean blockchain firm behind the error admitted to the mistake, contacted the mining pool that had benefitted, and worked out a deal where the firm got half of the accidentally sent ETH returned. Notably, that partial happy ending 100 percent relied on the goodwill of the mining pool, as ETH transactions are non-reversible by design.

If cryptocurrency use increases it will eventually approach how real currency is used with defacto Know Your Customer and reversibility.