The attacker who withdrew roughly 4,000 BTC from Liquid Network's federation wallet over the weekend has returned around 85% of the funds after Blockstream said its bridge nodes had been patched.The purported white-hat hacker communicated with Blockstream through Bitcoin OP_RETURN messages and PGP-encrypted text. In a message at block 965,875, the party told Blockstream to "fix the bug first" and ensure every node is patched before they would transfer the funds back.Adam Back-led Blockstream sub...