Blockchain.info is back online and services are fully restored. As described in its blog, all functions have returned including the block explorer, API functions and the web wallet service, although they warned of initially reduced performance as traffic spikes from a rush of returning users.
The outage was reported to be caused by a database glitch, although it seemed to have been initially catalyzed by shaky “shared coin” transactions. One user on reddit reported a failed transaction, and the functionality was intermittently enabled and disabled as other issues came to light.
Throughout the entire outage and even after, Blockchain.info sought to reassure users that bitcoins in their wallets are safe and secure, not affected by the outage in any way. They also expressed their apologies, sympathizing with frustrated users unable to access their funds- an all too familiar feeling for many in recent times. They expressed resolve “to regain your trust and make sure this doesn’t happen again.”
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They did emphasize though the ability to back up your wallet, which is then fully accessible even in the event of an outage or some other disaster. The backup is imported into the Multibit client, from where transactions can be made.
“Blockchain’s design is based on the principle of giving users 100% control of their funds. We don’t hold your keys and we don’t hold you hostage. You are your own bank.”
Some users are still reporting issues, with some saying its been up and down intermittently for several hours, and another complaining of not receiving e-mail authorization links. While the main blockchain explorer appears to be okay, the following error appears when attempting to drill down into a particular block: