Audit log

Every state-changing event for Arcadia Finance v1: moderation decisions on community submissions, plus corrections and updates from the news pipeline. URL-based decisions carry three independent witnesses — the original source, an Internet Archive snapshot taken at submission time, and a Solana memo signed by our publicly-disclosed publisher key.

1. #1publishby system:backfill

   2026-05-30 12:11:45Z
   Score: ? → ? (no score change)
   anchoranchored

   chain

   ●mainnet-betaslot 423,153,877

   sig

   4qtUX7QKekdU…7Vn76P3ncopyexplorer ↗

   hash

   9R99vYCRzzfs…yGCm3Kzwcopysha256 → base58

   verifying row…full verify ↗

   canonical bytes (11814 B) ▸

   {"actor":"system:backfill","investigation_id":"cba3a26a-3789-4b6c-9429-ca7d9dfd4a18","kind":"publish","page_slug":"arcadia-v1","published_at":"2026-05-30T12:11:45.495Z","sequence_num":1,"snapshot":{"content_type":"investigation","entity_name":"Arcadia Finance v1","sections":[{"content":"","heading":"","severity":"low","sources":[{"credibility":1,"name":"Arcadia Finance Security & Audits documentation","type":"official","url":"https://docs.arcadia.finance/security-and-risk/audits"},{"credibility":1,"name":"Introducing Arcadia V2 — Arcadia Finance on Medium","type":"official","url":"https://arcadiafinance.medium.com/introducing-arcadia-v2-79ee345af20b"},{"credibility":2,"name":"Arcadia Finance DApp listing — Coinbase","type":"other","url":"https://www.coinbase.com/web3/dapps/arcadia"}]},{"content":"","heading":"","severity":"critical","sources":[{"credibility":1,"name":"Arcadia Finance Post Mortem — Medium","type":"official","url":"https://arcadiafinance.medium.com/post-mortem-72e9d24a79b0"},{"credibility":2,"name":"DeFi protocol Arcadia Finance hacked on Ethereum and Optimism for $455K — CoinTelegraph","type":"news_article","url":"https://cointelegraph.com/news/arcadia-finance-hacked-on-ethereum-and-optimism-for-455k"},{"credibility":2,"name":"DeFi Platform Arcadia Finance Hacked for $455K — Crypto Daily","type":"news_article","url":"https://cryptodaily.co.uk/2023/07/defi-platform-arcadia-finance-hacked-for-455k"},{"credibility":2,"name":"DeFi Protocol Hack Drains $455K from Arcadia Finance — Crypto Briefing","type":"news_article","url":"https://cryptobriefing.com/defi-protocol-hack-drains-455k/"}]},{"content":"","heading":"","severity":"critical","sources":[{"credibility":1,"name":"Arcadia Finance Post Mortem — Medium","type":"official","url":"https://arcadiafinance.medium.com/post-mortem-72e9d24a79b0"},{"credibility":2,"name":"Hacker exploits vulnerability, drains $455,000 from DeFi protocol Arcadia Finance — Cryptopolitan","type":"news_article","url":"https://www.cryptopolitan.com/hacker-exploits-vulnerability-drains-455000-from-defi-protocol-arcadia-finance"},{"credibility":2,"name":"Arcadia Finance says exploiter contacted after $450K hack — Protos","type":"news_article","url":"https://protos.com/arcadia-finance-says-exploiter-contacted-after-450k-hack/"},{"credibility":2,"name":"Arcadia Finance Hit by $455K Exploit on Both Ethereum, Optimism Networks — CryptoPotato","type":"news_article","url":"https://cryptopotato.com/arcadia-finance-hit-by-455k-exploit-on-both-ethereum-optimism-networks/"}]},{"content":"","heading":"","severity":"high","sources":[{"credibility":1,"name":"Arcadia Finance Post Mortem — Medium","type":"official","url":"https://arcadiafinance.medium.com/post-mortem-72e9d24a79b0"},{"credibility":2,"name":"Arcadia Finance hacker used reentrancy exploit, team demands return of funds — CoinTelegraph","type":"news_article","url":"https://cointelegraph.com/news/arcadia-finance-hacker-used-reentrancy-exploit-team-demands-return-of-funds"},{"credibility":2,"name":"Arcadia Finance hits $3.5m hacker with ultimatum: pay up or get hunted — DL News","type":"news_article","url":"https://www.dlnews.com/articles/defi/coinbased-backed-arcadia-finance-offers-hacker-bounty/"},{"credibility":2,"name":"Arcadia Finance says exploiter contacted after $450K hack — Protos","type":"news_article","url":"https://protos.com/arcadia-finance-says-exploiter-contacted-after-450k-hack/"}]},{"content":"","heading":"","severity":"medium","sources":[{"credibility":2,"name":"Latest Crypto News: Hacker Drains $455K From Arcadia's Ethereum, Optimism Vaults; ZachXBT's Research Cited In Canadian NFT Rug Pull Class-Action Lawsuit — Outlook Business","type":"news_article","url":"https://www.outlookbusiness.com/news/latest-crypto-news-hacker-drains-455k-from-arcadia-s-ethereum-optimism-vaults-zachxbt-s-research-cited-in-canadian-nft-rug-pull-class-action-lawsuit-news-301762"},{"credibility":2,"name":"ZachXBT — Mirror.xyz (investigator's publication hub)","type":"other","url":"https://zachxbt.mirror.xyz/"}]},{"content":"","heading":"","severity":"critical","sources":[{"credibility":1,"name":"Arcadia Finance Security & Audits documentation","type":"official","url":"https://docs.arcadia.finance/security-and-risk/audits"},{"credibility":2,"name":"ArcadiaFi — Rekt News (July 2025 exploit analysis)","type":"research","url":"https://rekt.news/arcadiafi-rekt"},{"credibility":2,"name":"Arcadia Finance Suffers $2.5M Exploit on Base; Funds Converted to WETH — CoinTelegraph","type":"news_article","url":"https://cointelegraph.com/news/arcadia-finance-exploit-2-5m-crypto-theft"},{"credibility":2,"name":"Hackers Drain $2.5M from Arcadia Finance on Base Blockchain — CryptoNews","type":"news_article","url":"https://cryptonews.com/news/hackers-drain-2-5m-from-arcadia-finance-on-base-blockchain-heres-what-happened/"}]},{"content":"","heading":"","severity":"high","sources":[{"credibility":1,"name":"Arcadia Finance Post Mortem — Medium","type":"official","url":"https://arcadiafinance.medium.com/post-mortem-72e9d24a79b0"},{"credibility":1,"name":"Arcadia Finance Security & Audits documentation","type":"official","url":"https://docs.arcadia.finance/security-and-risk/audits"},{"credibility":2,"name":"ArcadiaFi — Rekt News","type":"research","url":"https://rekt.news/arcadiafi-rekt"},{"credibility":2,"name":"Arcadia Finance Hack Analysis — ImmuneByes","type":"research","url":"https://immunebytes.com/blog/arcadia-finance-exploit-detailed-hack-analysis/"}]}],"sources_used":[{"credibility":1,"name":"Arcadia Finance Post Mortem — Medium","type":"official","url":"https://arcadiafinance.medium.com/post-mortem-72e9d24a79b0"},{"credibility":1,"name":"Arcadia Finance Security & Audits documentation","type":"official","url":"https://docs.arcadia.finance/security-and-risk/audits"},{"credibility":2,"name":"DeFi protocol Arcadia Finance hacked on Ethereum and Optimism for $455K — CoinTelegraph","type":"news_article","url":"https://cointelegraph.com/news/arcadia-finance-hacked-on-ethereum-and-optimism-for-455k"},{"credibility":2,"name":"Arcadia Finance hacker used reentrancy exploit, team demands return of funds — CoinTelegraph","type":"news_article","url":"https://cointelegraph.com/news/arcadia-finance-hacker-used-reentrancy-exploit-team-demands-return-of-funds"},{"credibility":2,"name":"Arcadia Finance Suffers $2.5M Exploit on Base — CoinTelegraph","type":"news_article","url":"https://cointelegraph.com/news/arcadia-finance-exploit-2-5m-crypto-theft"},{"credibility":2,"name":"Arcadia Finance says exploiter contacted after $450K hack — Protos","type":"news_article","url":"https://protos.com/arcadia-finance-says-exploiter-contacted-after-450k-hack/"},{"credibility":2,"name":"Arcadia Finance hits $3.5m hacker with ultimatum — DL News","type":"news_article","url":"https://www.dlnews.com/articles/defi/coinbased-backed-arcadia-finance-offers-hacker-bounty/"},{"credibility":2,"name":"DeFi Platform Arcadia Finance Hacked for $455K — Crypto Daily","type":"news_article","url":"https://cryptodaily.co.uk/2023/07/defi-platform-arcadia-finance-hacked-for-455k"},{"credibility":2,"name":"DeFi Protocol Hack Drains $455K from Arcadia Finance — Crypto Briefing","type":"news_article","url":"https://cryptobriefing.com/defi-protocol-hack-drains-455k/"},{"credibility":2,"name":"Arcadia Finance Hit by $455K Exploit on Both Ethereum, Optimism Networks — CryptoPotato","type":"news_article","url":"https://cryptopotato.com/arcadia-finance-hit-by-455k-exploit-on-both-ethereum-optimism-networks/"},{"credibility":2,"name":"Hacker drains $455K from Arcadia's Ethereum, Optimism Vaults; ZachXBT's Research Cited — Outlook Business","type":"news_article","url":"https://www.outlookbusiness.com/news/latest-crypto-news-hacker-drains-455k-from-arcadia-s-ethereum-optimism-vaults-zachxbt-s-research-cited-in-canadian-nft-rug-pull-class-action-lawsuit-news-301762"},{"credibility":2,"name":"ArcadiaFi — Rekt News","type":"research","url":"https://rekt.news/arcadiafi-rekt"},{"credibility":2,"name":"Hackers Drain $2.5M from Arcadia Finance on Base Blockchain — CryptoNews","type":"news_article","url":"https://cryptonews.com/news/hackers-drain-2-5m-from-arcadia-finance-on-base-blockchain-heres-what-happened/"},{"credibility":2,"name":"DeFi Platform Arcadia Finance Falls Victim to $455K Hack — CryptoNews","type":"news_article","url":"https://cryptonews.com/news/defi-platform-arcadia-finance-falls-victim-455k-hack-ethereum-optimism/"},{"credibility":2,"name":"ZachXBT — Mirror.xyz","type":"other","url":"https://zachxbt.mirror.xyz/"}],"summary":"Arcadia Finance v1 was a decentralized margin lending protocol deployed on Ethereum and Optimism that suffered a critical reentrancy exploit on July 10, 2023, resulting in the loss of approximately $459,030 across both chains. The attack exploited a missing reentrancy guard in the vault liquidation function combined with absent untrusted-input validation, allowing the attacker to bypass collateral health checks and drain darcWETH and darcUSDC vaults. The stolen funds on Optimism were largely laundered through Tornado Cash; the protocol subsequently paused all contracts and issued a bounty ultimatum to the attacker that went unanswered.","timeline":[{"date":"2022-10-01","event":"Nethermind begins audit of complete Arcadia Finance v1 codebase (Q4 2022 – Q1 2023).","source":"Arcadia Finance Audits Documentation","source_url":"https://docs.arcadia.finance/security-and-risk/audits"},{"date":"2023-07-10","event":"Attacker exploits reentrancy vulnerability in Arcadia Finance v1 vault liquidation function on Ethereum and Optimism. PeckShield issues first public alert. Total losses: $459,030 ($123,758 on Ethereum; $335,271 on Optimism). Attacker addresses: Optimism 0xD3641C912a6A4c30338787E3C464420b561A9467; Ethereum 0x5C75e94dD0Ab9c10BFd1B8073DafEF031D3c050d.","source":"Arcadia Finance Post Mortem / CoinTelegraph","source_url":"https://arcadiafinance.medium.com/post-mortem-72e9d24a79b0"},{"date":"2023-07-10","event":"Arcadia Finance team pauses all liquidity pool contracts, sets interest rates to zero, and engages BlockSec, Hexagate, and PeckShield for investigation. TVL falls 77% from $605K to $140K.","source":"Arcadia Finance Post Mortem","source_url":"https://arcadiafinance.medium.com/post-mortem-72e9d24a79b0"},{"date":"2023-07-10","event":"Optimism attacker routes approximately 179 ETH through Tornado Cash. Ethereum attacker retains funds in wallet. Team contacts law enforcement and sends on-chain messages to attacker addresses.","source":"Protos / Crypto Daily","source_url":"https://protos.com/arcadia-finance-says-exploiter-contacted-after-450k-hack/"},{"date":"2023-07-11","event":"Arcadia Finance issues 24-hour on-chain ultimatum: return 90% of stolen funds and keep 10% as white-hat bounty with no legal pursuit, or face a 10% public bounty for information leading to identification and arrest. Attacker does not respond.","source":"DL News / CoinTelegraph","source_url":"https://www.dlnews.com/articles/defi/coinbased-backed-arcadia-finance-offers-hacker-bounty/"},{"date":"2025-07-14","event":"Attacker funds fresh wallet via Tornado Cash on Ethereum at 10:58 PM UTC in preparation for a new exploit targeting Arcadia Finance v2 Rebalancer contract on Base.","source":"Rekt News","source_url":"https://rekt.news/arcadiafi-rekt"},{"date":"2025-07-15","event":"Arcadia Finance v2 Rebalancer contract exploited on Base for approximately $2.5M (total later estimated at $3.6M across two attack waves). Attacker bridges 840 ETH to Ethereum mainnet via Across Protocol. AAA token drops 46%. Team offers 10% white-hat bounty; attacker does not comply.","source":"Rekt News / CoinTelegraph","source_url":"https://cointelegraph.com/news/arcadia-finance-exploit-2-5m-crypto-theft"}]},"v":1}

   Verify offline (run on your own machine)

   python -m src.verify_decision d8f3d655-0331-46f4-b776-311172562eb0copy