A GitHub user typed four words and froze $150 million in Ethereum. "I accidentally killed it." Still frozen today. Nobody got it back. This is the story of devops199 and the Parity wallet bug. July 19, 2017 - Parity, built by Ethereum co-founder Gavin Wood, is one of crypto's most trusted wallets - a bug in its multisig wallets lets an attacker drain 153,037 ETH (~$30M) - Parity patches it the next day The patch hides a new problem. A shared "library" contract every new Parity wallet depends on. Nobody owns it and still has a kill switch. A dev warned about it in August. Parity filed it as a "convenience enhancement." November 6, 2017 - devops199 tells Parity's chat "I'm eth newbie..just learning" - says he's been sending kill() to random contracts - finds the unclaimed library - makes himself the owner - calls kill() The library self-destructs. 587 wallets now point to nothing. 513,774 ETH is frozen. He asks: "Will I get arrested for this?" Then opens GitHub issue #6995. Title: "anyone can kill your contract" Body: "I accidentally killed it." who got hit - Web3 Foundation, building Polkadot (Gavin Wood's own project): 306,276 ETH - ICONOMI: 114,939 ETH - hundreds more April 2018 - EIP-999 proposes bringing the dead library back - a coin vote: 330 no, 300 yes - the frozen Polkadot wallet votes yes - the proposal is withdrawn Today - the library address still holds no code - Polkadot's wallet still holds 306,276 ETH - at $2,267 per ETH, the full 513,774 ETH is worth $1.16 billion today - the account behind issue #6995 now shows up as "ghost" one account got $150M frozen in 2017 and now it has ~$1.16B